@@ -125,14 +125,6 @@ fvp-base:
- TESTING: testimage
- FIRMWARE: edk2
-fvp-baser-aemv8r64:
- extends: .build
- parallel:
- matrix:
- - TESTING: testimage
- tags:
- - x86_64
-
fvps:
extends: .build
deleted file mode 100644
@@ -1,7 +0,0 @@
-header:
- version: 14
- includes:
- - ci/base.yml
- - ci/fvp.yml
-
-machine: fvp-baser-aemv8r64
@@ -55,7 +55,7 @@ The name of the FVP binary itself, for example `fvp-base` uses `FVP_Base_RevC-2x
The name of the recipe that provides the FVP executable set in `FVP_EXE`, for example `fvp-base` uses `fvp-base-a-aem-native`. This *must* be a `-native` recipe as the binary will be executed on the build host.
-There are recipes for common FVPs in meta-arm already, and writing new recipes is trivial. For FVPs which are free to download `fvp-base-a-aem.bb` is a good example. Some FVPs must be downloaded separately as they need an account on Arm's website, `fvp-base-r-aem.bb` is a good example of those.
+There are recipes for common FVPs in meta-arm already, and writing new recipes is trivial. For FVPs which are free to download `fvp-base-a-aem.bb` is a good example. Some FVPs must be downloaded separately as they need an account on Arm's website.
If `FVP_PROVIDER` is not set then it is assumed that `FVP_EXE` is installed on the host already.
deleted file mode 100644
@@ -1,42 +0,0 @@
-header:
- version: 9
- includes:
- - kas/fvp-eula.yml
-
-env:
- DISPLAY: ""
-
-distro: poky
-machine: fvp-baser-aemv8r64
-
-defaults:
- repos:
- refspec: master
-
-repos:
- meta-arm:
- url: https://git.yoctoproject.org/git/meta-arm
- path: layers/meta-arm
- layers:
- meta-arm:
- meta-arm-bsp:
- meta-arm-toolchain:
-
- poky:
- url: https://git.yoctoproject.org/git/poky
- path: layers/poky
- layers:
- meta:
- meta-poky:
-
-local_conf_header:
- base: |
- CONF_VERSION = "2"
- PACKAGE_CLASSES = "package_ipk"
- PACKAGECONFIG:remove:pn-qemu-system-native = "gtk+ sdl"
- EXTRA_IMAGE_FEATURES:append = " debug-tweaks ssh-server-openssh"
- CORE_IMAGE_EXTRA_INSTALL:append = " ssh-pregen-hostkeys"
- IMAGE_CLASSES:append = " testimage"
-
-target:
- - core-image-minimal
deleted file mode 100644
@@ -1,8 +0,0 @@
-header:
- version: 9
- includes:
- - kas/fvp-baser-aemv8r64-bsp.yml
-
-local_conf_header:
- base-rt: |
- PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-rt"
deleted file mode 100644
@@ -1,66 +0,0 @@
-# Configuration for Fixed Virtual Platform BaseR AEMv8r64 Machine
-
-#@TYPE: Machine
-#@NAME: FVP BaseR AEMv8r64 Machine
-#@DESCRIPTION: Machine configuration for FVP BaseR AEMv8r64
-
-require conf/machine/include/arm/armv8r/arch-armv8r64.inc
-
-EXTRA_IMAGEDEPENDS += "boot-wrapper-aarch64"
-
-PREFERRED_PROVIDER_virtual/kernel ?= "linux-yocto"
-PREFERRED_VERSION_u-boot ?= "2023.01"
-
-KERNEL_IMAGETYPE = "Image"
-KERNEL_DEVICETREE = "arm/fvp-baser-aemv8r64.dtb"
-
-UBOOT_MACHINE ?= "vexpress_aemv8r_defconfig"
-
-SERIAL_CONSOLES = "115200;ttyAMA0"
-
-IMAGE_CLASSES:append = " fvpboot"
-IMAGE_FSTYPES += "wic"
-WKS_FILE ?= "efi-disk.wks.in"
-EFI_PROVIDER ?= "grub-efi"
-MACHINE_FEATURES:append = " efi"
-
-IMAGE_NAME_SUFFIX = ""
-
-# As this is a virtual target that will not be used in the real world there is
-# no need for real SSH keys.
-MACHINE_EXTRA_RRECOMMENDS += "ssh-pregen-hostkeys"
-
-# testimage configuration
-TEST_TARGET = "OEFVPTarget"
-TEST_SUITES:append = " fvp_boot fvp_devices"
-TEST_TARGET_IP ?= "127.0.0.1:2222"
-TEST_SERVER_IP ?= "127.0.1.1"
-TEST_FVP_DEVICES ?= "rtc watchdog networking virtiorng cpu_hotplug"
-
-FVP_EXTRA_ARGS = "-a cluster0*=linux-system.axf"
-FVP_PROVIDER ?= "fvp-base-r-aem-native"
-FVP_EXE ?= "FVP_BaseR_AEMv8R"
-FVP_CONSOLE ?= "terminal_0"
-
-# FVP parameters
-FVP_CONFIG[bp.exclusive_monitor.monitor_access_level] ?= "2"
-FVP_CONFIG[bp.refcounter.non_arch_start_at_default] ?= "1"
-FVP_CONFIG[bp.refcounter.use_real_time] ?= "1"
-FVP_CONFIG[bp.ve_sysregs.exit_on_shutdown] ?= "1"
-FVP_CONFIG[bp.virtio_net.enabled] ?= "1"
-FVP_CONFIG[bp.virtio_net.hostbridge.userNetPorts] ?= "2222=22"
-FVP_CONFIG[bp.virtio_net.hostbridge.userNetworking] ?= "1"
-FVP_CONFIG[bp.virtio_net.secure_accesses] = "1"
-FVP_CONFIG[bp.virtio_rng.enabled] ?= "1"
-FVP_CONFIG[bp.virtio_rng.secure_accesses] = "1"
-FVP_CONFIG[bp.virtioblockdevice.image_path] ?= "${IMAGE_NAME}.wic"
-FVP_CONFIG[bp.virtioblockdevice.secure_accesses] = "1"
-FVP_CONFIG[cache_state_modelled] ?= "0"
-FVP_CONFIG[cci400.force_on_from_start] = "1"
-FVP_CONFIG[cluster0.gicv3.cpuintf-mmap-access-level] ?= "2"
-FVP_CONFIG[cluster0.gicv3.extended-interrupt-range-support] ?= "1"
-FVP_CONFIG[cluster0.gicv3.SRE-EL2-enable-RAO] ?= "1"
-FVP_CONFIG[cluster0.gicv3.SRE-enable-action-on-mmap] ?= "2"
-FVP_CONFIG[cluster0.has_aarch64] ?= "1"
-FVP_CONFIG[gic_distributor.GICD_CTLR-DS-1-means-secure-only] ?= "1"
-FVP_CONFIG[gic_distributor.has-two-security-states] ?= "0"
deleted file mode 100644
@@ -1,10 +0,0 @@
-require conf/machine/include/arm/arch-armv8r.inc
-
-TUNE_FEATURES:tune-armv8r =+ "aarch64"
-PACKAGE_EXTRA_ARCHS:tune-armv8r =+ "aarch64"
-BASE_LIB:tune-armv8r = "lib64"
-BASE_LIB:tune-armv8r-crc = "lib64"
-BASE_LIB:tune-armv8r-crypto = "lib64"
-BASE_LIB:tune-armv8r-simd = "lib64"
-BASE_LIB:tune-armv8r-crc-simd = "lib64"
-BASE_LIB:tune-armv8r-crc-crypto-simd = "lib64"
deleted file mode 100644
@@ -1,264 +0,0 @@
-Armv8-R AArch64 AEM FVP Support in meta-arm-bsp
-===============================================
-
-Overview
---------
-
-Fixed Virtual Platforms (FVP) are complete simulations of an Arm system,
-including processor, memory and peripherals. These are set out in a
-"programmer's view", which gives you a comprehensive model on which to build
-and test your software.
-
-The Armv8-R AEM FVP is a free of charge Armv8-R Fixed Virtual Platform. It
-supports the latest Armv8-R feature set.
-
-This BSP implements a reference stack for the AArch64 support in the R-class
-first announced with the Cortex-R82 processor:
-https://developer.arm.com/ip-products/processors/cortex-r/cortex-r82
-
-Fast Models Fixed Virtual Platforms (FVP) Reference Guide:
-https://developer.arm.com/docs/100966/latest
-
-
-BSP Support
------------
-
-The fvp-baser-aemv8r64 Yocto MACHINE supports the following BSP components,
-where either a standard or Real-Time Linux kernel (PREEMPT\_RT) can be built
-and run:
-
- - FVP_Base_AEMv8R: v11.22.14
- - boot-wrapper-aarch64: provides PSCI support
- - U-Boot: v2022.07 - provides UEFI services
- - Linux kernel: linux-yocto-5.15
- - Linux kernel with PREEMPT\_RT support: linux-yocto-rt-5.15
-
-Note that the Real-Time Linux kernel (PREEMPT\_RT) does not use the real-time
-architectural extensions of the Armv8-R feature set.
-
-High-Level Architecture
------------------------
-
-The diagram below shows the current boot flow:
-
- +---------------------------------------------------------------+
- | Linux kernel |
- +---------------------------------------------------------------+
- /|\ /|\
- | |
- | UEFI services |
- | PSCI services |
- \|/ |
- +----------------+ | S-EL1
- ----| U-Boot |------------------------------|-----------
- +----------------+ | S-EL2
- /|\ |
- | |
- | |
- | |
- +--------------------------------------------------\|/----------+
- | +----------------+ +----------------+ |
- | boot-wrapper-aarch64 | Device tree | | PSCI handler | |
- | +----------------+ +----------------+ |
- +---------------------------------------------------------------+
-
-
-The firmware binary (generated as `linux-system.axf`) includes
-boot-wrapper-aarch64, the flattened device tree and U-Boot. U-Boot is configured
-to automatically detect a virtio block device and boot the UEFI payload at the
-path `/efi/boot/bootaa64.efi`. Using the standard build, the first partition
-contains a Grub image at this path, which boots the Linux kernel at `/Image` on
-the same partition. The second partition of the image contains the Linux root
-file system.
-
-There is no EL3 or non-secure world in the Armv8-R AArch64 architecture, so the
-reset vector starts boot-wrapper-aarch64 at S-EL2. Boot-wrapper-aarch64 is
-compiled with the `--enable-keep-el` flag, which causes it to boot U-Boot at
-S-EL2 too. U-Boot is compiled with the `CONFIG_ARMV8_SWITCH_TO_EL1` flag, which
-causes it to switch to S-EL1 before booting Linux.
-
-The bundled device tree is passed to U-Boot via register x0. U-Boot passes the
-same device tree to Linux via the UEFI system table.
-
-Power state management is provided by PSCI services in boot-wrapper-aarch64.
-Linux accesses the PSCI handler via HVC calls to S-EL2. U-Boot has been patched
-to prevent it from overriding the exception vector at S-EL2. The PSCI handler
-memory region is added to a `/memreserve/` node in the device tree.
-
-Please note that the final firmware architecture for the fvp-baser-aemv8r64 is
-not yet stabilized. The patches in this layer are provided for development and
-evaluation purposes only, and should not be used in production firmware.
-
-Quick start: Howto Build and Run
---------------------------------
-
-### Host environment setup
-The following instructions have been tested on hosts running Ubuntu 18.04 and
-Ubuntu 20.04.
-Install the required packages for the build host:
-https://docs.yoctoproject.org/singleindex.html#required-packages-for-the-build-host
-
-Kas is a setup tool for bitbake based projects. The minimal supported version
-is 3.0, install it like so:
-
- pip3 install --user --upgrade kas
-
-For more details on kas, see https://kas.readthedocs.io/.
-
-To build the images for the fvp-baser-aemv8r64 machine, you also need to accept
-the EULA at
-https://developer.arm.com/downloads/-/arm-ecosystem-fvps/eula
-by setting the following environment variable:
-
- ARM_FVP_EULA_ACCEPT="True"
-
-**Note:** The host machine should have at least 50 GBytes of free disk space
-for the next steps to work correctly.
-
-### Fetch sources
-To fetch and build the ongoing development of the software stack follow the
-instructions on this document.
-
-To fetch and build the version 1 (single core) find instructions at https://community.arm.com/developer/tools-software/oss-platforms/w/docs/633/release-1-single-core
-
-To fetch and build the version 2 (linux smp) find instructions at https://community.arm.com/developer/tools-software/oss-platforms/w/docs/634/release-2---smp
-
-Fetch the meta-arm repository into a build directory:
-
- mkdir -p ~/fvp-baser-aemv8r64-build
- cd ~/fvp-baser-aemv8r64-build
- git clone https://git.yoctoproject.org/git/meta-arm
-
-
-### Build
-Building with the standard Linux kernel:
-
- cd ~/fvp-baser-aemv8r64-build
- export ARM_FVP_EULA_ACCEPT="True"
- kas build meta-arm/kas/fvp-baser-aemv8r64-bsp.yml
-
-Building with the Real-Time Linux kernel (PREEMPT\_RT):
-
- cd ~/fvp-baser-aemv8r64-build
- export ARM_FVP_EULA_ACCEPT="True"
- kas build meta-arm/kas/fvp-baser-aemv8r64-rt-bsp.yml
-
-### Run
-To run an image after the build is done with the standard Linux kernel:
-
- kas shell --keep-config-unchanged \
- meta-arm/kas/fvp-baser-aemv8r64-bsp.yml \
- --command "../layers/meta-arm/scripts/runfvp \
- --console "
-
-To run an image after the build is done with the Real-Time Linux kernel
-(PREEMPT\_RT):
-
- kas shell --keep-config-unchanged \
- meta-arm/kas/fvp-baser-aemv8r64-rt-bsp.yml \
- --command "../layers/meta-arm/scripts/runfvp \
- --console "
-
-**Note:** The terminal console login is `root` without password.
-
-To finish the fvp emulation, you need to close the telnet session:
-
- - Escape to telnet console with ``ctrl+]``.
- - Run ``quit`` to close the session.
-
-### Networking
-The FVP is configured by default to use "user-mode networking", which simulates
-an IP router and DHCP server to avoid additional host dependencies and
-networking configuration. Outbound connections work automatically, e.g. by
-running:
-
- wget www.arm.com
-
-Inbound connections require an explicit port mapping from the host. By default,
-port 2222 on the host is mapped to port 22 on the FVP, so that the following
-command will connect to an ssh server running on the FVP:
-
- ssh root@localhost -p 2222
-
-Note that user-mode networking does not support ICMP, so `ping` will not work.
-For more information about user-mode networking, please see
-https://developer.arm.com/documentation/100964/1117/Introduction-to-Fast-Models/User-mode-networking?lang=en
-
-### File sharing between host and fvp
-It is possible to share a directory between the host machine and the fvp using
-the virtio P9 device component included in the kernel. To do so, create a
-directory to be mounted from the host machine:
-
- mkdir /path/to/host-mount-dir
-
-Then, add the following parameter containing the path to the directory when
-launching the model:
-
- --parameter 'bp.virtiop9device.root_path=/path/to/host-mount-dir'
-
-e.g. for the standard Linux kernel:
-
- kas shell --keep-config-unchanged \
- meta-arm/kas/fvp-baser-aemv8r64-bsp.yml \
- --command "../layers/meta-arm/scripts/runfvp \
- --console -- --parameter \
- 'bp.virtiop9device.root_path=/path/to/host-mount-dir'"
-
-Once you are logged into the fvp, the host directory can be mounted in a
-directory on the model using the following command:
-
- mount -t 9p -o trans=virtio,version=9p2000.L FM /path/to/fvp-mount-dir
-
-Devices supported in the kernel
--------------------------------
-
-- serial
-- virtio 9p
-- virtio disk
-- virtio network
-- virtio rng
-- watchdog
-- rtc
-
-Known Issues and Limitations
-----------------------------
-
-- Only PSCI CPU\_ON and CPU\_OFF functions are supported
-- Linux kernel does not support booting from secure EL2 on Armv8-R AArch64
-- Linux KVM does not support Armv8-R AArch64
-- Device DMA memory cache-coherence issue: the FVP `cache_state_modelled`
- parameter will affect the cache coherence behavior of peripherals’ DMA. When
- users set `cache_state_modelled=1`, they also have to set
- `cci400.force_on_from_start=1` to force the FVP to enable snooping on upstream
- ports.
-
-Change Log
-----------
-- Enabled the ability for U-Boot to apply device tree overlays
-- Fixed bug in U-Boot that caused changes to the `memory` node in the device
- tree to be ignored.
-- Added boot-wrapper-aarch64 support for booting SMP payloads at S-EL2.
-- Enabled testimage support by default.
-- Added virtio\_rng to improve random number generation.
-- Added U-Boot v2022.01 for UEFI support.
-- Updated Linux kernel version from 5.14 to 5.15 for both standard and
- Real-Time (PREEMPT\_RT) builds.
-- Updated boot-wrapper-aarch64 revision and added support for booting U-Boot.
-- Included boot-wrapper-aarch64 PSCI services in `/memreserve/` region.
-- Fixed the counter frequency initialization in boot-wrapper-aarch64.
-- Configured the FVP to use the default RAM size of 4 Gb
-- Fixed PL011 and SP805 register sizes in the device tree.
-- Added virtio\_net User Networking mode by default and removed instructions
- about tap networking setup.
-- Updated Linux kernel version from 5.10 to 5.14 for both standard and
- Real-Time (PREEMPT\_RT) builds.
-- Enabled SMP support via boot-wrapper-aarch64 providing the PSCI CPU\_ON and
- CPU\_OFF functions.
-- Introduced Armv8-R64 compiler flags.
-- Added Linux PREEMPT\_RT support via linux-yocto-rt-5.10.
-- Added support for file sharing with the host machine using Virtio P9.
-- Added support for runfvp.
-- Added performance event support (PMU) in the Linux device tree.
-- Introduced the fvp-baser-aemv8r64 machine and its BSP composed of
- boot-wrapper-aarch64 and linux-yocto-5.10 supporting serial, virtio disk,
- virtio network, watchdog and rtc.
deleted file mode 100644
@@ -1,36 +0,0 @@
-COMPATIBLE_MACHINE = "fvp-baser-aemv8r64"
-
-FILESEXTRAPATHS:prepend := "${THISDIR}/files/${MACHINE}:"
-SRC_URI:append = " \
- file://0001-aarch64-Rename-labels-and-prepare-for-lower-EL-booti.patch \
- file://0002-aarch64-Prepare-for-EL1-booting.patch \
- file://0003-aarch64-Prepare-for-lower-EL-booting.patch \
- file://0004-gic-v3-Prepare-for-gicv3-with-EL2.patch \
- file://0005-aarch64-Prepare-for-booting-with-EL2.patch \
- file://0006-aarch64-Introduce-EL2-boot-code-for-Armv8-R-AArch64.patch \
- file://0007-Allow-enable-psci-to-choose-between-smc-and-hvc.patch \
- file://0008-aarch64-Disable-CNTPCT_EL0-trap-for-v8-R64.patch \
- file://0009-lds-Mark-the-mem-range.patch \
- file://0010-common-Introduce-the-libfdt.patch \
- file://0011-common-Add-essential-libc-functions.patch \
- file://0012-Makefile-Add-the-libfdt-to-the-Makefile-system.patch \
- file://0013-platform-Add-print_hex-func.patch \
- file://0014-common-Add-mem-usage-to-memreserve.patch \
- file://0015-boot-Add-the-enable-keep-el-compile-option.patch \
- file://0016-Makefile-Change-COUNTER_FREQ-to-100-MHz.patch \
- file://0017-PSCI-Apply-flush-cache-after-setting-branch_data.patch \
- file://0018-PSCI-Add-function-call-entry-point.patch \
- file://0019-lds-Rearrange-and-mark-the-sections.patch \
- file://0020-common-Provide-firmware-info-using-libfdt.patch \
- file://0021-boot-Enable-firmware-node-initialization.patch \
- "
-
-BOOT_WRAPPER_AARCH64_CMDLINE = "\
-earlycon console=ttyAMA0 loglevel=8 rootfstype=ext4 root=/dev/vda1 rw"
-
-EXTRA_OECONF += "--enable-psci=hvc --enable-keep-el"
-
-TUNE_CCARGS = ""
-
-BOOT_WRAPPER_AARCH64_KERNEL = "u-boot.bin"
-do_deploy[depends] += "u-boot:do_deploy"
deleted file mode 100644
@@ -1,4 +0,0 @@
-MACHINE_BOOT_WRAPPER_AARCH64_REQUIRE ?= ""
-MACHINE_BOOT_WRAPPER_AARCH64_REQUIRE:fvp-baser-aemv8r64 ?= "boot-wrapper-aarch64-fvp-baser-aemv8r64.inc"
-
-require ${MACHINE_BOOT_WRAPPER_AARCH64_REQUIRE}
deleted file mode 100644
@@ -1,135 +0,0 @@
-From 545f6950ae4dc55b4974986aa9629adb16eaf4e1 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 25 May 2021 07:25:00 +0100
-Subject: [PATCH] aarch64: Rename labels and prepare for lower EL booting
-
-Prepare for booting from lower EL. Rename *_el3 relavant labels with
-*_el_max and *_no_el3 with *_keep_el. Since the original _no_el3 means
-"We neither do init sequence at this highest EL nor drop to lower EL
-when entering to kernel", we rename it with _keep_el to make it more
-clear for lower EL initialisation.
-
-Upstream-Status: Pending
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
----
- arch/aarch64/boot.S | 28 ++++++++++++++++++++--------
- arch/aarch64/psci.S | 9 +++++----
- arch/aarch64/spin.S | 4 ++--
- 3 files changed, 27 insertions(+), 14 deletions(-)
-
-diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
-index d682ba5..fab694e 100644
---- a/arch/aarch64/boot.S
-+++ b/arch/aarch64/boot.S
-@@ -34,18 +34,30 @@ ASM_FUNC(_start)
-
- /*
- * EL3 initialisation
-+ * Boot sequence
-+ * If CurrentEL == EL3, then goto EL3 initialisation and drop to
-+ * lower EL before entering the kernel.
-+ * Else, no initialisation and keep the current EL before
-+ * entering the kernel.
- */
- mrs x0, CurrentEL
- cmp x0, #CURRENTEL_EL3
-- b.eq 1f
-+ b.eq el3_init
-
-+ /*
-+ * We stay in the current EL for entering the kernel
-+ */
- mov w0, #1
-- ldr x1, =flag_no_el3
-+ ldr x1, =flag_keep_el
- str w0, [x1]
-
-- b start_no_el3
-+ b start_keep_el
-
--1: mov x0, #0x30 // RES1
-+ /*
-+ * EL3 initialisation
-+ */
-+el3_init:
-+ mov x0, #0x30 // RES1
- orr x0, x0, #(1 << 0) // Non-secure EL1
- orr x0, x0, #(1 << 8) // HVC enable
-
-@@ -145,7 +157,7 @@ ASM_FUNC(_start)
-
- bl gic_secure_init
-
-- b start_el3
-+ b start_el_max
-
- err_invalid_id:
- b .
-@@ -172,7 +184,7 @@ ASM_FUNC(jump_kernel)
- bl find_logical_id
- bl setup_stack // Reset stack pointer
-
-- ldr w0, flag_no_el3
-+ ldr w0, flag_keep_el
- cmp w0, #0 // Prepare Z flag
-
- mov x0, x20
-@@ -181,7 +193,7 @@ ASM_FUNC(jump_kernel)
- mov x3, x23
-
- b.eq 1f
-- br x19 // No EL3
-+ br x19 // Keep current EL
-
- 1: mov x4, #SPSR_KERNEL
-
-@@ -199,5 +211,5 @@ ASM_FUNC(jump_kernel)
-
- .data
- .align 3
--flag_no_el3:
-+flag_keep_el:
- .long 0
-diff --git a/arch/aarch64/psci.S b/arch/aarch64/psci.S
-index 8bd224b..7b8919a 100644
---- a/arch/aarch64/psci.S
-+++ b/arch/aarch64/psci.S
-@@ -79,7 +79,7 @@ smc_exit:
- ldp x18, x19, [sp], #16
- eret
-
--ASM_FUNC(start_el3)
-+ASM_FUNC(start_el_max)
- ldr x0, =vector
- bl setup_vector
-
-@@ -89,10 +89,11 @@ ASM_FUNC(start_el3)
- b psci_first_spin
-
- /*
-- * This PSCI implementation requires EL3. Without EL3 we'll only boot the
-- * primary cpu, all others will be trapped in an infinite loop.
-+ * This PSCI implementation requires the highest EL(EL3 or Armv8-R EL2).
-+ * Without the highest EL, we'll only boot the primary cpu, all othersr
-+ * will be trapped in an infinite loop.
- */
--ASM_FUNC(start_no_el3)
-+ASM_FUNC(start_keep_el)
- cpuid x0, x1
- bl find_logical_id
- cbz x0, psci_first_spin
-diff --git a/arch/aarch64/spin.S b/arch/aarch64/spin.S
-index 1ea1c0b..bfb1d47 100644
---- a/arch/aarch64/spin.S
-+++ b/arch/aarch64/spin.S
-@@ -12,8 +12,8 @@
-
- .text
-
--ASM_FUNC(start_el3)
--ASM_FUNC(start_no_el3)
-+ASM_FUNC(start_el_max)
-+ASM_FUNC(start_keep_el)
- cpuid x0, x1
- bl find_logical_id
-
deleted file mode 100644
@@ -1,48 +0,0 @@
-From bad32d3fc127a421be416b17e4f7d6d514f06abb Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 25 May 2021 07:25:00 +0100
-Subject: [PATCH] aarch64: Prepare for EL1 booting
-
-When booting from EL1, add a check and skip the init of
-sctlr_el2 in jump_kernel
-
-Upstream-Status: Pending
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Reviewed-by: Andre Przywara <andre.przywara@arm.com>
----
- arch/aarch64/boot.S | 6 +++++-
- arch/aarch64/include/asm/cpu.h | 1 +
- 2 files changed, 6 insertions(+), 1 deletion(-)
-
-diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
-index fab694e..5105b41 100644
---- a/arch/aarch64/boot.S
-+++ b/arch/aarch64/boot.S
-@@ -177,10 +177,14 @@ ASM_FUNC(jump_kernel)
- ldr x0, =SCTLR_EL1_KERNEL
- msr sctlr_el1, x0
-
-+ mrs x0, CurrentEL
-+ cmp x0, #CURRENTEL_EL2
-+ b.lt 1f
-+
- ldr x0, =SCTLR_EL2_KERNEL
- msr sctlr_el2, x0
-
-- cpuid x0, x1
-+1: cpuid x0, x1
- bl find_logical_id
- bl setup_stack // Reset stack pointer
-
-diff --git a/arch/aarch64/include/asm/cpu.h b/arch/aarch64/include/asm/cpu.h
-index 49d3f86..3767da3 100644
---- a/arch/aarch64/include/asm/cpu.h
-+++ b/arch/aarch64/include/asm/cpu.h
-@@ -11,6 +11,7 @@
-
- #define MPIDR_ID_BITS 0xff00ffffff
-
-+#define CURRENTEL_EL2 (2 << 2)
- #define CURRENTEL_EL3 (3 << 2)
-
- /*
deleted file mode 100644
@@ -1,55 +0,0 @@
-From 252cbd36e51414b60ab68306f9c38e358709494d Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 25 May 2021 07:25:00 +0100
-Subject: [PATCH] aarch64: Prepare for lower EL booting
-
-Save SPSR_KERNEL into spsr_to_elx during el3_init.
-The jump_kernel will load spsr_to_elx into spsr_el3.
-
-This change will make it easier to control whether drop to lower EL
-before jumping to the kernel.
-
-Upstream-Status: Pending
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Reviewed-by: Andre Przywara <andre.przywara@arm.com>
----
- arch/aarch64/boot.S | 15 +++++++++++++--
- 1 file changed, 13 insertions(+), 2 deletions(-)
-
-diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
-index 5105b41..243198d 100644
---- a/arch/aarch64/boot.S
-+++ b/arch/aarch64/boot.S
-@@ -151,7 +151,16 @@ el3_init:
- mov x0, #ZCR_EL3_LEN_MAX // SVE: Enable full vector len
- msr ZCR_EL3, x0 // for EL2.
-
--1:
-+ /*
-+ * Save SPSR_KERNEL into spsr_to_elx.
-+ * The jump_kernel will load spsr_to_elx into spsr_el3
-+ */
-+1: mov w0, #SPSR_KERNEL
-+ ldr x1, =spsr_to_elx
-+ str w0, [x1]
-+ b el_max_init
-+
-+el_max_init:
- ldr x0, =COUNTER_FREQ
- msr cntfrq_el0, x0
-
-@@ -199,7 +208,7 @@ ASM_FUNC(jump_kernel)
- b.eq 1f
- br x19 // Keep current EL
-
--1: mov x4, #SPSR_KERNEL
-+1: ldr w4, spsr_to_elx
-
- /*
- * If bit 0 of the kernel address is set, we're entering in AArch32
-@@ -217,3 +226,5 @@ ASM_FUNC(jump_kernel)
- .align 3
- flag_keep_el:
- .long 0
-+spsr_to_elx:
-+ .long 0
deleted file mode 100644
@@ -1,105 +0,0 @@
-From bff110a95a5e4c9db2d61e629b4aa4b84530201e Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 25 May 2021 07:25:00 +0100
-Subject: [PATCH] gic-v3: Prepare for gicv3 with EL2
-
-This is a preparation for allowing boot-wrapper configuring the gicv3
-with EL2.
-
-When confiuring with EL2, since there is no ICC_CTLR_EL2, the
-ICC_CTLR_EL3 cannot be replaced with ICC_CTLR_EL2 simply.
-See [https://developer.arm.com/documentation/ihi0069/latest/].
-
-As the caller, gic_secure_init expects the ICC_CTLR to be written,
-we change the function into gic_init_icc_ctlr(). In the GIC spec,
-the r/w bits in this register ([6:0]) either affect EL3 IRQ routing
-(not applicable since no EL3), non-secure IRQ handling (not applicable
-since only secure state in Armv8-R aarch64), or are aliased to
-ICC_CTLR_EL1 bits.
-So, based on this, the new gic_init_icc_ctlr() would be:
-When currentEL is EL3, init ICC_CTLR_EL3 as before.
-When currentEL is not EL3, init ICC_CTLR_EL1 with ICC_CTLR_EL1_RESET.
-
-Upstream-Status: Pending
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Reviewed-by: Andre Przywara <andre.przywara@arm.com>
----
- arch/aarch32/include/asm/gic-v3.h | 7 +++++++
- arch/aarch64/include/asm/gic-v3.h | 23 ++++++++++++++++++++---
- common/gic-v3.c | 2 +-
- 3 files changed, 28 insertions(+), 4 deletions(-)
-
-diff --git a/arch/aarch32/include/asm/gic-v3.h b/arch/aarch32/include/asm/gic-v3.h
-index 65f38de..11e7bc7 100644
---- a/arch/aarch32/include/asm/gic-v3.h
-+++ b/arch/aarch32/include/asm/gic-v3.h
-@@ -9,6 +9,8 @@
- #ifndef __ASM_AARCH32_GICV3_H
- #define __ASM_AARCH32_GICV3_H
-
-+#define ICC_CTLR_RESET (0UL)
-+
- static inline void gic_write_icc_sre(uint32_t val)
- {
- asm volatile ("mcr p15, 6, %0, c12, c12, 5" : : "r" (val));
-@@ -19,4 +21,9 @@ static inline void gic_write_icc_ctlr(uint32_t val)
- asm volatile ("mcr p15, 6, %0, c12, c12, 4" : : "r" (val));
- }
-
-+static inline void gic_init_icc_ctlr()
-+{
-+ gic_write_icc_ctlr(ICC_CTLR_RESET);
-+}
-+
- #endif
-diff --git a/arch/aarch64/include/asm/gic-v3.h b/arch/aarch64/include/asm/gic-v3.h
-index 5b32380..090ab0b 100644
---- a/arch/aarch64/include/asm/gic-v3.h
-+++ b/arch/aarch64/include/asm/gic-v3.h
-@@ -15,14 +15,31 @@
- #define ICC_CTLR_EL3 "S3_6_C12_C12_4"
- #define ICC_PMR_EL1 "S3_0_C4_C6_0"
-
-+#define ICC_CTLR_EL3_RESET (0UL)
-+#define ICC_CTLR_EL1_RESET (0UL)
-+
-+static inline uint32_t current_el(void)
-+{
-+ uint32_t val;
-+
-+ asm volatile ("mrs %0, CurrentEL" : "=r" (val));
-+ return val;
-+}
-+
- static inline void gic_write_icc_sre(uint32_t val)
- {
-- asm volatile ("msr " ICC_SRE_EL3 ", %0" : : "r" (val));
-+ if (current_el() == CURRENTEL_EL3)
-+ asm volatile ("msr " ICC_SRE_EL3 ", %0" : : "r" (val));
-+ else
-+ asm volatile ("msr " ICC_SRE_EL2 ", %0" : : "r" (val));
- }
-
--static inline void gic_write_icc_ctlr(uint32_t val)
-+static inline void gic_init_icc_ctlr()
- {
-- asm volatile ("msr " ICC_CTLR_EL3 ", %0" : : "r" (val));
-+ if (current_el() == CURRENTEL_EL3)
-+ asm volatile ("msr " ICC_CTLR_EL3 ", %0" : : "r" (ICC_CTLR_EL3_RESET));
-+ else
-+ asm volatile ("msr " ICC_CTLR_EL1 ", %0" : : "r" (ICC_CTLR_EL1_RESET));
- }
-
- #endif
-diff --git a/common/gic-v3.c b/common/gic-v3.c
-index 6207007..a0fe564 100644
---- a/common/gic-v3.c
-+++ b/common/gic-v3.c
-@@ -117,6 +117,6 @@ void gic_secure_init(void)
- gic_write_icc_sre(ICC_SRE_Enable | ICC_SRE_DIB | ICC_SRE_DFB | ICC_SRE_SRE);
- isb();
-
-- gic_write_icc_ctlr(0);
-+ gic_init_icc_ctlr();
- isb();
- }
deleted file mode 100644
@@ -1,63 +0,0 @@
-From ba955efb35ce1d41b562190d7c2fbcbcf8ef97ff Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 25 May 2021 07:25:00 +0100
-Subject: [PATCH] aarch64: Prepare for booting with EL2
-
-Prepare for allowing boot-wrapper to be entered in EL2.
-Detect current EL and set the corresponding EL registers.
-
-Upstream-Status: Pending
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Reviewed-by: Andre Przywara <andre.przywara@arm.com>
----
- arch/aarch64/boot.S | 8 ++++++++
- arch/aarch64/utils.S | 10 +++++++++-
- 2 files changed, 17 insertions(+), 1 deletion(-)
-
-diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
-index 243198d..3593ca5 100644
---- a/arch/aarch64/boot.S
-+++ b/arch/aarch64/boot.S
-@@ -216,10 +216,18 @@ ASM_FUNC(jump_kernel)
- */
- bfi x4, x19, #5, #1
-
-+ mrs x5, CurrentEL
-+ cmp x5, #CURRENTEL_EL2
-+ b.eq 1f
-+
- msr elr_el3, x19
- msr spsr_el3, x4
- eret
-
-+1: msr elr_el2, x19
-+ msr spsr_el2, x4
-+ eret
-+
- .ltorg
-
- .data
-diff --git a/arch/aarch64/utils.S b/arch/aarch64/utils.S
-index 85c7f8a..f02a249 100644
---- a/arch/aarch64/utils.S
-+++ b/arch/aarch64/utils.S
-@@ -34,10 +34,18 @@ ASM_FUNC(find_logical_id)
- ret
-
- /*
-- * Setup EL3 vectors
-+ * Setup EL3/EL2 vectors
- * x0: vector address
- */
- ASM_FUNC(setup_vector)
-+ mrs x1, CurrentEL
-+ cmp x1, #CURRENTEL_EL2
-+ b.eq 1f
-+
- msr VBAR_EL3, x0
- isb
- ret
-+
-+1: msr VBAR_EL2, x0
-+ isb
-+ ret
deleted file mode 100644
@@ -1,182 +0,0 @@
-From 8e44fac113d935affed1550480631f3fe7f30584 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 25 May 2021 07:25:00 +0100
-Subject: [PATCH] aarch64: Introduce EL2 boot code for Armv8-R AArch64
-
-The Armv8-R AArch64 profile does not support the EL3 exception level.
-The Armv8-R AArch64 profile allows for an (optional) VMSAv8-64 MMU
-at EL1, which allows to run off-the-shelf Linux. However EL2 only
-supports a PMSA, which is not supported by Linux, so we need to drop
-into EL1 before entering the kernel.
-
-We add a new err_invalid_arch symbol as a dead loop. If we detect the
-current Armv8-R aarch64 only supports with PMSA, meaning we cannot boot
-Linux anymore, then we jump to err_invalid_arch.
-
-During Armv8-R aarch64 init, to make sure nothing unexpected traps into
-EL2, we auto-detect and config FIEN and EnSCXT in HCR_EL2.
-
-The boot sequence is:
-If CurrentEL == EL3, then goto EL3 initialisation and drop to lower EL
- before entering the kernel.
-If CurrentEL == EL2 && id_aa64mmfr0_el1.MSA == 0xf (Armv8-R aarch64),
- if id_aa64mmfr0_el1.MSA_frac == 0x2,
- then goto Armv8-R AArch64 initialisation and drop to EL1 before
- entering the kernel.
- else, which means VMSA unsupported and cannot boot Linux,
- goto err_invalid_arch (dead loop).
-Else, no initialisation and keep the current EL before entering the
- kernel.
-
-Upstream-Status: Pending
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
----
- arch/aarch64/boot.S | 92 +++++++++++++++++++++++++++++++++-
- arch/aarch64/include/asm/cpu.h | 2 +
- 2 files changed, 92 insertions(+), 2 deletions(-)
-
-diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
-index 3593ca5..a219ea7 100644
---- a/arch/aarch64/boot.S
-+++ b/arch/aarch64/boot.S
-@@ -37,16 +37,24 @@ ASM_FUNC(_start)
- * Boot sequence
- * If CurrentEL == EL3, then goto EL3 initialisation and drop to
- * lower EL before entering the kernel.
-+ * If CurrentEL == EL2 && id_aa64mmfr0_el1.MSA == 0xf, then
-+ * If id_aa64mmfr0_el1.MSA_frac == 0x2, then goto
-+ * Armv8-R AArch64 initialisation and drop to EL1 before
-+ * entering the kernel.
-+ * Else, which means VMSA unsupported and cannot boot Linux,
-+ * goto err_invalid_arch (dead loop).
- * Else, no initialisation and keep the current EL before
- * entering the kernel.
- */
- mrs x0, CurrentEL
-- cmp x0, #CURRENTEL_EL3
-- b.eq el3_init
-+ cmp x0, #CURRENTEL_EL2
-+ bgt el3_init
-+ beq el2_init
-
- /*
- * We stay in the current EL for entering the kernel
- */
-+keep_el:
- mov w0, #1
- ldr x1, =flag_keep_el
- str w0, [x1]
-@@ -160,6 +168,85 @@ el3_init:
- str w0, [x1]
- b el_max_init
-
-+ /*
-+ * EL2 Armv8-R AArch64 initialisation
-+ */
-+el2_init:
-+ /* Detect Armv8-R AArch64 */
-+ mrs x1, id_aa64mmfr0_el1
-+ /*
-+ * Check MSA, bits [51:48]:
-+ * 0xf means Armv8-R AArch64.
-+ * If not 0xf, proceed in Armv8-A EL2.
-+ */
-+ ubfx x0, x1, #48, #4 // MSA
-+ cmp x0, 0xf
-+ bne keep_el
-+ /*
-+ * Check MSA_frac, bits [55:52]:
-+ * 0x2 means EL1&0 translation regime also supports VMSAv8-64.
-+ */
-+ ubfx x0, x1, #52, #4 // MSA_frac
-+ cmp x0, 0x2
-+ /*
-+ * If not 0x2, no VMSA, so cannot boot Linux and dead loop.
-+ * Also, since the architecture guarantees that those CPUID
-+ * fields never lose features when the value in a field
-+ * increases, we use blt to cover it.
-+ */
-+ blt err_invalid_arch
-+
-+ mrs x0, midr_el1
-+ msr vpidr_el2, x0
-+
-+ mrs x0, mpidr_el1
-+ msr vmpidr_el2, x0
-+
-+ mov x0, #(1 << 31) // VTCR_MSA: VMSAv8-64 support
-+ msr vtcr_el2, x0
-+
-+ /* Init HCR_EL2 */
-+ mov x0, #(1 << 31) // RES1: Armv8-R aarch64 only
-+
-+ mrs x1, id_aa64pfr0_el1
-+ ubfx x2, x1, #56, 4 // ID_AA64PFR0_EL1.CSV2
-+ cmp x2, 0x2
-+ b.lt 1f
-+ /*
-+ * Disable trap when accessing SCTXNUM_EL0 or SCTXNUM_EL1
-+ * if FEAT_CSV2.
-+ */
-+ orr x0, x0, #(1 << 53) // HCR_EL2.EnSCXT
-+
-+1: ubfx x2, x1, #28, 4 // ID_AA64PFR0_EL1.RAS
-+ cmp x2, 0x2
-+ b.lt 1f
-+ /* Disable trap when accessing ERXPFGCDN_EL1 if FEAT_RASv1p1. */
-+ orr x0, x0, #(1 << 47) // HCR_EL2.FIEN
-+
-+ /* Enable pointer authentication if present */
-+1: mrs x1, id_aa64isar1_el1
-+ /*
-+ * If ID_AA64ISAR1_EL1.{GPI, GPA, API, APA} == {0000, 0000, 0000, 0000}
-+ * then HCR_EL2.APK and HCR_EL2.API are RES 0.
-+ * Else
-+ * set HCR_EL2.APK and HCR_EL2.API.
-+ */
-+ ldr x2, =(((0xff) << 24) | (0xff << 4))
-+ and x1, x1, x2
-+ cbz x1, 1f
-+
-+ orr x0, x0, #(1 << 40) // HCR_EL2.APK
-+ orr x0, x0, #(1 << 41) // HCR_EL2.API
-+
-+1: msr hcr_el2, x0
-+ isb
-+
-+ mov w0, #SPSR_KERNEL_EL1
-+ ldr x1, =spsr_to_elx
-+ str w0, [x1]
-+ // fall through
-+
- el_max_init:
- ldr x0, =COUNTER_FREQ
- msr cntfrq_el0, x0
-@@ -169,6 +256,7 @@ el_max_init:
- b start_el_max
-
- err_invalid_id:
-+err_invalid_arch:
- b .
-
- /*
-diff --git a/arch/aarch64/include/asm/cpu.h b/arch/aarch64/include/asm/cpu.h
-index 3767da3..3c0e00d 100644
---- a/arch/aarch64/include/asm/cpu.h
-+++ b/arch/aarch64/include/asm/cpu.h
-@@ -25,6 +25,7 @@
- #define SPSR_I (1 << 7) /* IRQ masked */
- #define SPSR_F (1 << 6) /* FIQ masked */
- #define SPSR_T (1 << 5) /* Thumb */
-+#define SPSR_EL1H (5 << 0) /* EL1 Handler mode */
- #define SPSR_EL2H (9 << 0) /* EL2 Handler mode */
- #define SPSR_HYP (0x1a << 0) /* M[3:0] = hyp, M[4] = AArch32 */
-
-@@ -50,6 +51,7 @@
- #else
- #define SCTLR_EL1_KERNEL SCTLR_EL1_RES1
- #define SPSR_KERNEL (SPSR_A | SPSR_D | SPSR_I | SPSR_F | SPSR_EL2H)
-+#define SPSR_KERNEL_EL1 (SPSR_A | SPSR_D | SPSR_I | SPSR_F | SPSR_EL1H)
- #endif
-
- #ifndef __ASSEMBLY__
deleted file mode 100644
@@ -1,89 +0,0 @@
-From 0b9a966b8a28961b078215ee7169e32a976d5e7d Mon Sep 17 00:00:00 2001
-From: Qi Feng <qi.feng@arm.com>
-Date: Wed, 26 May 2021 17:52:01 +0800
-Subject: [PATCH] Allow --enable-psci to choose between smc and hvc
-
-According to Armv8-R AArch64 manual [1], Armv8-R AArch64 does not
-support smc:
-
-- Pseudocode for AArch64.CheckForSMCUndefOrTrap has this snippet:
-
- if !HaveEL(EL3) || PSTATE.EL == EL0 then
- UNDEFINED;
-
- And Armv8-R AArch64 does not have EL3.
-
-- In the document of HCR_EL2 TSC bit:
- If EL3 is not implemented and HCR_EL2.NV is 0, it is IMPLEMENTATION
- DEFINED whether this bit is:
- - RES0.
- - Implemented with the functionality as described in HCR_EL2.TSC.
-
-So hvc is needed in this situation. And due to the lack of libfdt, the
-psci method cannot be modified at runtime.
-
-To use smc, use --enable-psci or --enable-psci=smc.
-To use hvc, use --enable-psci=hvc.
-
-[1]: https://developer.arm.com/documentation/ddi0600/latest/
-
-Issue-Id: SCM-2654
-Upstream-Status: Pending
-Signed-off-by: Qi Feng <qi.feng@arm.com>
-Change-Id: Ib8afabdad2d98bc37371d165bbb6f1f9b88bfc87
-
-Upstream-Status: Pending
-Signed-off-by: Huifeng Zhang <Huifeng.Zhang@arm.com>
----
- Makefile.am | 10 +++++-----
- configure.ac | 14 +++++++++-----
- 2 files changed, 14 insertions(+), 10 deletions(-)
-
-diff --git a/Makefile.am b/Makefile.am
-index 5731a19..fc66662 100644
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -50,11 +50,11 @@ endif
- if PSCI
- ARCH_OBJ += psci.o
- COMMON_OBJ += psci.o
--PSCI_NODE := psci { \
-- compatible = \"arm,psci\"; \
-- method = \"smc\"; \
-- cpu_on = <$(PSCI_CPU_ON)>; \
-- cpu_off = <$(PSCI_CPU_OFF)>; \
-+PSCI_NODE := psci { \
-+ compatible = \"arm,psci\"; \
-+ method = \"$(PSCI_METHOD)\"; \
-+ cpu_on = <$(PSCI_CPU_ON)>; \
-+ cpu_off = <$(PSCI_CPU_OFF)>; \
- };
- CPU_NODES := $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/addpsci.pl $(KERNEL_DTB))
- else
-diff --git a/configure.ac b/configure.ac
-index 9e3b722..53e51be 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -83,13 +83,17 @@ AS_IF([test "x$X_IMAGE" != "x"],
- # Allow a user to pass --enable-psci
- AC_ARG_ENABLE([psci],
- AS_HELP_STRING([--disable-psci], [disable the psci boot method]),
-- [USE_PSCI=$enableval], [USE_PSCI="yes"])
--AM_CONDITIONAL([PSCI], [test "x$USE_PSCI" = "xyes"])
--AS_IF([test "x$USE_PSCI" = "xyes"], [], [USE_PSCI=no])
--
--AS_IF([test "x$USE_PSCI" != "xyes" -a "x$KERNEL_ES" = "x32"],
-+ [case "${enableval}" in
-+ yes|smc) USE_PSCI=smc ;;
-+ hvc) USE_PSCI=hvc ;;
-+ *) AC_MSG_ERROR([Bad value "${enableval}" for --enable-psci. Use "smc" or "hvc"]) ;;
-+ esac], [USE_PSCI="yes"])
-+AM_CONDITIONAL([PSCI], [test "x$USE_PSCI" = "xyes" -o "x$USE_PSCI" = "xsmc" -o "x$USE_PSCI" = "xhvc"])
-+
-+AS_IF([test "x$USE_PSCI" = "xno" -a "x$KERNEL_ES" = "x32"],
- [AC_MSG_ERROR([With an AArch32 kernel, boot method must be PSCI.])]
- )
-+AC_SUBST([PSCI_METHOD], [$USE_PSCI])
-
- # Allow a user to pass --with-initrd
- AC_ARG_WITH([initrd],
deleted file mode 100644
@@ -1,48 +0,0 @@
-From 521c121eccb386aca7c75d92528e495546adccec Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Mon, 25 Oct 2021 17:09:13 +0800
-Subject: [PATCH] aarch64: Disable CNTPCT_EL0 trap for v8-R64
-
-To allow EL1 to access CNTPCT_EL0 without traping into EL2, we need to
-set CNTHCTL_EL2.EL1PCTEN to 1.
-
-For v8-R64, the CNTHCTL_EL2 register follows the v8-A architecture.
-However, as described in the v8-A architecture profile, the
-CNTHCTL_EL2's bit assignments are different according to whether the
-FEAT_VHE is implemented.
-
-Since v8-R64 does not support FEAT_VHE, we do not need to detect
-FEAT_VHE. We can simply set CNTHCTL_EL2.EL1PCTEN to 1.
-
-Issue-ID: SCM-3508
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: I4147e66341c8153312021e6f2ab67d0037246da1
----
- arch/aarch64/boot.S | 12 ++++++++++++
- 1 file changed, 12 insertions(+)
-
-diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
-index a219ea7..27b1139 100644
---- a/arch/aarch64/boot.S
-+++ b/arch/aarch64/boot.S
-@@ -240,6 +240,18 @@ el2_init:
- orr x0, x0, #(1 << 41) // HCR_EL2.API
-
- 1: msr hcr_el2, x0
-+
-+ /*
-+ * To disable trap when accessing CNTPCT_EL0, we need to set
-+ * CNTHCTL_EL2.EL1PCTEN to 1. However, the CNTHCTL_EL2 bit assignments
-+ * are different according to whether the FEAT_VHE is implemented.
-+ *
-+ * For Armv8-R AArch64, FEAT_VHE is not supported, so we do not need to
-+ * detect FEAT_VHE(ID_AA64MMFR1_EL1.VH) and simply set
-+ * CNTHCTL_EL2.EL1PCTEN to 1.
-+ */
-+ mov x0, #1 // CNTHCTL_EL2.EL1PCTEN
-+ msr cnthctl_el2, x0
- isb
-
- mov w0, #SPSR_KERNEL_EL1
deleted file mode 100644
@@ -1,38 +0,0 @@
-From 780df234d98db81485b1f351f902a68def35c9d4 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 2 Nov 2021 15:10:28 +0800
-Subject: [PATCH] lds: Mark the mem range
-
-Add firmware_start and firmware_end, so that we can use them to
-calculate the mem range of boot-wrapper and then set the range to
-/memreserve/ of dtb.
-
-Issue-ID: SCM-3815
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: Idc5a2894e193c75381049a0f359b4b2a51c567ee
----
- model.lds.S | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/model.lds.S b/model.lds.S
-index d4e7e13..ab98ddf 100644
---- a/model.lds.S
-+++ b/model.lds.S
-@@ -64,6 +64,7 @@ SECTIONS
- #endif
-
- .boot PHYS_OFFSET: {
-+ PROVIDE(firmware_start = .);
- *(.init)
- *(.text*)
- *(.data* .rodata* .bss* COMMON)
-@@ -76,6 +77,7 @@ SECTIONS
- mbox = .;
- QUAD(0x0)
- }
-+ PROVIDE(firmware_end = .);
-
- ASSERT(etext <= (PHYS_OFFSET + TEXT_LIMIT), ".text overflow!")
- }
deleted file mode 100644
@@ -1,6044 +0,0 @@
-From b3762b6c5a56bf594bc5cb63d145e8efd86e106e Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 28 Dec 2021 17:02:17 +0800
-Subject: [PATCH] common: Introduce the libfdt
-
-We introduce libfdt (v1.6.1) [1] to boot-wrapper, so we can dynamically
-add the firmware node.
-
-According to [2]: The libfdt is GPL/BSD dual-licensed which means it can
-be used either under the terms of GPL, or under the terms of BSD.
-We choose BSD because the boot-wrapper is under BSD.
-
-[1]: https://github.com/dgibson/dtc/tree/v1.6.1/libfdt
-[2]: https://github.com/dgibson/dtc/blob/v1.6.1/README.license
-
-Issue-Id: SCM-3814
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: Iec2f469053c8ac0ed38838c597b21a42bdf67b38
----
- common/libfdt/README.license | 56 +
- common/libfdt/fdt.c | 335 +++++
- common/libfdt/fdt_addresses.c | 101 ++
- common/libfdt/fdt_check.c | 93 ++
- common/libfdt/fdt_empty_tree.c | 38 +
- common/libfdt/fdt_overlay.c | 882 +++++++++++++
- common/libfdt/fdt_ro.c | 859 +++++++++++++
- common/libfdt/fdt_rw.c | 500 +++++++
- common/libfdt/fdt_strerror.c | 59 +
- common/libfdt/fdt_sw.c | 384 ++++++
- common/libfdt/fdt_wip.c | 94 ++
- common/libfdt/libfdt_internal.h | 192 +++
- include/fdt.h | 66 +
- include/libfdt.h | 2147 +++++++++++++++++++++++++++++++
- include/libfdt_env.h | 95 ++
- 15 files changed, 5901 insertions(+)
- create mode 100644 common/libfdt/README.license
- create mode 100644 common/libfdt/fdt.c
- create mode 100644 common/libfdt/fdt_addresses.c
- create mode 100644 common/libfdt/fdt_check.c
- create mode 100644 common/libfdt/fdt_empty_tree.c
- create mode 100644 common/libfdt/fdt_overlay.c
- create mode 100644 common/libfdt/fdt_ro.c
- create mode 100644 common/libfdt/fdt_rw.c
- create mode 100644 common/libfdt/fdt_strerror.c
- create mode 100644 common/libfdt/fdt_sw.c
- create mode 100644 common/libfdt/fdt_wip.c
- create mode 100644 common/libfdt/libfdt_internal.h
- create mode 100644 include/fdt.h
- create mode 100644 include/libfdt.h
- create mode 100644 include/libfdt_env.h
-
-diff --git a/common/libfdt/README.license b/common/libfdt/README.license
-new file mode 100644
-index 0000000..102b004
---- /dev/null
-+++ b/common/libfdt/README.license
-@@ -0,0 +1,56 @@
-+Licensing and contribution policy of dtc and libfdt
-+===================================================
-+
-+This dtc package contains two pieces of software: dtc itself, and
-+libfdt which comprises the files in the libfdt/ subdirectory. These
-+two pieces of software, although closely related, are quite distinct.
-+dtc does not incorporate or rely on libfdt for its operation, nor vice
-+versa. It is important that these two pieces of software have
-+different license conditions.
-+
-+As SPDX license tags in each source file attest, dtc is licensed
-+under the GNU GPL. The full text of the GPL can be found in the file
-+entitled 'GPL' which should be included in this package. dtc code,
-+therefore, may not be incorporated into works which do not have a GPL
-+compatible license.
-+
-+libfdt, however, is GPL/BSD dual-licensed. That is, it may be used
-+either under the terms of the GPL, or under the terms of the 2-clause
-+BSD license (aka the ISC license). The full terms of that license can
-+be found are in the file entitled 'BSD-2-Clause'. This is, in
-+practice, equivalent to being BSD licensed, since the terms of the BSD
-+license are strictly more permissive than the GPL.
-+
-+I made the decision to license libfdt in this way because I want to
-+encourage widespread and correct usage of flattened device trees,
-+including by proprietary or otherwise GPL-incompatible firmware or
-+tools. Allowing libfdt to be used under the terms of the BSD license
-+makes that it easier for vendors or authors of such software to do so.
-+
-+This does mean that libfdt code could be "stolen" - say, included in a
-+proprietary fimware and extended without contributing those extensions
-+back to the libfdt mainline. While I hope that doesn't happen, I
-+believe the goal of allowing libfdt to be widely used is more
-+important than avoiding that. libfdt is quite small, and hardly
-+rocket science; so the incentive for such impolite behaviour is small,
-+and the inconvenience caused thereby is not dire.
-+
-+Licenses such as the LGPL which would allow code to be used in non-GPL
-+software, but also require contributions to be returned were
-+considered. However, libfdt is designed to be used in firmwares and
-+other environments with unusual technical constraints. It's difficult
-+to anticipate all possible changes which might be needed to meld
-+libfdt into such environments and so difficult to suitably word a
-+license that puts the boundary between what is and isn't permitted in
-+the intended place. Again, I judged encouraging widespread use of
-+libfdt by keeping the license terms simple and familiar to be the more
-+important goal.
-+
-+**IMPORTANT** It's intended that all of libfdt as released remain
-+permissively licensed this way. Therefore only contributions which
-+are released under these terms can be merged into the libfdt mainline.
-+
-+
-+David Gibson <david@gibson.dropbear.id.au>
-+(principal original author of dtc and libfdt)
-+2 November 2007
-diff --git a/common/libfdt/fdt.c b/common/libfdt/fdt.c
-new file mode 100644
-index 0000000..9fe7cf4
---- /dev/null
-+++ b/common/libfdt/fdt.c
-@@ -0,0 +1,335 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+/*
-+ * Minimal sanity check for a read-only tree. fdt_ro_probe_() checks
-+ * that the given buffer contains what appears to be a flattened
-+ * device tree with sane information in its header.
-+ */
-+int32_t fdt_ro_probe_(const void *fdt)
-+{
-+ uint32_t totalsize = fdt_totalsize(fdt);
-+
-+ if (can_assume(VALID_DTB))
-+ return totalsize;
-+
-+ /* The device tree must be at an 8-byte aligned address */
-+ if ((uintptr_t)fdt & 7)
-+ return -FDT_ERR_ALIGNMENT;
-+
-+ if (fdt_magic(fdt) == FDT_MAGIC) {
-+ /* Complete tree */
-+ if (!can_assume(LATEST)) {
-+ if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
-+ return -FDT_ERR_BADVERSION;
-+ if (fdt_last_comp_version(fdt) >
-+ FDT_LAST_SUPPORTED_VERSION)
-+ return -FDT_ERR_BADVERSION;
-+ }
-+ } else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
-+ /* Unfinished sequential-write blob */
-+ if (!can_assume(VALID_INPUT) && fdt_size_dt_struct(fdt) == 0)
-+ return -FDT_ERR_BADSTATE;
-+ } else {
-+ return -FDT_ERR_BADMAGIC;
-+ }
-+
-+ if (totalsize < INT32_MAX)
-+ return totalsize;
-+ else
-+ return -FDT_ERR_TRUNCATED;
-+}
-+
-+static int check_off_(uint32_t hdrsize, uint32_t totalsize, uint32_t off)
-+{
-+ return (off >= hdrsize) && (off <= totalsize);
-+}
-+
-+static int check_block_(uint32_t hdrsize, uint32_t totalsize,
-+ uint32_t base, uint32_t size)
-+{
-+ if (!check_off_(hdrsize, totalsize, base))
-+ return 0; /* block start out of bounds */
-+ if ((base + size) < base)
-+ return 0; /* overflow */
-+ if (!check_off_(hdrsize, totalsize, base + size))
-+ return 0; /* block end out of bounds */
-+ return 1;
-+}
-+
-+size_t fdt_header_size_(uint32_t version)
-+{
-+ if (version <= 1)
-+ return FDT_V1_SIZE;
-+ else if (version <= 2)
-+ return FDT_V2_SIZE;
-+ else if (version <= 3)
-+ return FDT_V3_SIZE;
-+ else if (version <= 16)
-+ return FDT_V16_SIZE;
-+ else
-+ return FDT_V17_SIZE;
-+}
-+
-+size_t fdt_header_size(const void *fdt)
-+{
-+ return can_assume(LATEST) ? FDT_V17_SIZE :
-+ fdt_header_size_(fdt_version(fdt));
-+}
-+
-+int fdt_check_header(const void *fdt)
-+{
-+ size_t hdrsize;
-+
-+ /* The device tree must be at an 8-byte aligned address */
-+ if ((uintptr_t)fdt & 7)
-+ return -FDT_ERR_ALIGNMENT;
-+
-+ if (fdt_magic(fdt) != FDT_MAGIC)
-+ return -FDT_ERR_BADMAGIC;
-+ if (!can_assume(LATEST)) {
-+ if ((fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
-+ || (fdt_last_comp_version(fdt) >
-+ FDT_LAST_SUPPORTED_VERSION))
-+ return -FDT_ERR_BADVERSION;
-+ if (fdt_version(fdt) < fdt_last_comp_version(fdt))
-+ return -FDT_ERR_BADVERSION;
-+ }
-+ hdrsize = fdt_header_size(fdt);
-+ if (!can_assume(VALID_DTB)) {
-+
-+ if ((fdt_totalsize(fdt) < hdrsize)
-+ || (fdt_totalsize(fdt) > INT_MAX))
-+ return -FDT_ERR_TRUNCATED;
-+
-+ /* Bounds check memrsv block */
-+ if (!check_off_(hdrsize, fdt_totalsize(fdt),
-+ fdt_off_mem_rsvmap(fdt)))
-+ return -FDT_ERR_TRUNCATED;
-+ }
-+
-+ if (!can_assume(VALID_DTB)) {
-+ /* Bounds check structure block */
-+ if (!can_assume(LATEST) && fdt_version(fdt) < 17) {
-+ if (!check_off_(hdrsize, fdt_totalsize(fdt),
-+ fdt_off_dt_struct(fdt)))
-+ return -FDT_ERR_TRUNCATED;
-+ } else {
-+ if (!check_block_(hdrsize, fdt_totalsize(fdt),
-+ fdt_off_dt_struct(fdt),
-+ fdt_size_dt_struct(fdt)))
-+ return -FDT_ERR_TRUNCATED;
-+ }
-+
-+ /* Bounds check strings block */
-+ if (!check_block_(hdrsize, fdt_totalsize(fdt),
-+ fdt_off_dt_strings(fdt),
-+ fdt_size_dt_strings(fdt)))
-+ return -FDT_ERR_TRUNCATED;
-+ }
-+
-+ return 0;
-+}
-+
-+const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)
-+{
-+ unsigned int uoffset = offset;
-+ unsigned int absoffset = offset + fdt_off_dt_struct(fdt);
-+
-+ if (offset < 0)
-+ return NULL;
-+
-+ if (!can_assume(VALID_INPUT))
-+ if ((absoffset < uoffset)
-+ || ((absoffset + len) < absoffset)
-+ || (absoffset + len) > fdt_totalsize(fdt))
-+ return NULL;
-+
-+ if (can_assume(LATEST) || fdt_version(fdt) >= 0x11)
-+ if (((uoffset + len) < uoffset)
-+ || ((offset + len) > fdt_size_dt_struct(fdt)))
-+ return NULL;
-+
-+ return fdt_offset_ptr_(fdt, offset);
-+}
-+
-+uint32_t fdt_next_tag(const void *fdt, int startoffset, int *nextoffset)
-+{
-+ const fdt32_t *tagp, *lenp;
-+ uint32_t tag;
-+ int offset = startoffset;
-+ const char *p;
-+
-+ *nextoffset = -FDT_ERR_TRUNCATED;
-+ tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);
-+ if (!can_assume(VALID_DTB) && !tagp)
-+ return FDT_END; /* premature end */
-+ tag = fdt32_to_cpu(*tagp);
-+ offset += FDT_TAGSIZE;
-+
-+ *nextoffset = -FDT_ERR_BADSTRUCTURE;
-+ switch (tag) {
-+ case FDT_BEGIN_NODE:
-+ /* skip name */
-+ do {
-+ p = fdt_offset_ptr(fdt, offset++, 1);
-+ } while (p && (*p != '\0'));
-+ if (!can_assume(VALID_DTB) && !p)
-+ return FDT_END; /* premature end */
-+ break;
-+
-+ case FDT_PROP:
-+ lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));
-+ if (!can_assume(VALID_DTB) && !lenp)
-+ return FDT_END; /* premature end */
-+ /* skip-name offset, length and value */
-+ offset += sizeof(struct fdt_property) - FDT_TAGSIZE
-+ + fdt32_to_cpu(*lenp);
-+ if (!can_assume(LATEST) &&
-+ fdt_version(fdt) < 0x10 && fdt32_to_cpu(*lenp) >= 8 &&
-+ ((offset - fdt32_to_cpu(*lenp)) % 8) != 0)
-+ offset += 4;
-+ break;
-+
-+ case FDT_END:
-+ case FDT_END_NODE:
-+ case FDT_NOP:
-+ break;
-+
-+ default:
-+ return FDT_END;
-+ }
-+
-+ if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))
-+ return FDT_END; /* premature end */
-+
-+ *nextoffset = FDT_TAGALIGN(offset);
-+ return tag;
-+}
-+
-+int fdt_check_node_offset_(const void *fdt, int offset)
-+{
-+ if (!can_assume(VALID_INPUT)
-+ && ((offset < 0) || (offset % FDT_TAGSIZE)))
-+ return -FDT_ERR_BADOFFSET;
-+
-+ if (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE)
-+ return -FDT_ERR_BADOFFSET;
-+
-+ return offset;
-+}
-+
-+int fdt_check_prop_offset_(const void *fdt, int offset)
-+{
-+ if (!can_assume(VALID_INPUT)
-+ && ((offset < 0) || (offset % FDT_TAGSIZE)))
-+ return -FDT_ERR_BADOFFSET;
-+
-+ if (fdt_next_tag(fdt, offset, &offset) != FDT_PROP)
-+ return -FDT_ERR_BADOFFSET;
-+
-+ return offset;
-+}
-+
-+int fdt_next_node(const void *fdt, int offset, int *depth)
-+{
-+ int nextoffset = 0;
-+ uint32_t tag;
-+
-+ if (offset >= 0)
-+ if ((nextoffset = fdt_check_node_offset_(fdt, offset)) < 0)
-+ return nextoffset;
-+
-+ do {
-+ offset = nextoffset;
-+ tag = fdt_next_tag(fdt, offset, &nextoffset);
-+
-+ switch (tag) {
-+ case FDT_PROP:
-+ case FDT_NOP:
-+ break;
-+
-+ case FDT_BEGIN_NODE:
-+ if (depth)
-+ (*depth)++;
-+ break;
-+
-+ case FDT_END_NODE:
-+ if (depth && ((--(*depth)) < 0))
-+ return nextoffset;
-+ break;
-+
-+ case FDT_END:
-+ if ((nextoffset >= 0)
-+ || ((nextoffset == -FDT_ERR_TRUNCATED) && !depth))
-+ return -FDT_ERR_NOTFOUND;
-+ else
-+ return nextoffset;
-+ }
-+ } while (tag != FDT_BEGIN_NODE);
-+
-+ return offset;
-+}
-+
-+int fdt_first_subnode(const void *fdt, int offset)
-+{
-+ int depth = 0;
-+
-+ offset = fdt_next_node(fdt, offset, &depth);
-+ if (offset < 0 || depth != 1)
-+ return -FDT_ERR_NOTFOUND;
-+
-+ return offset;
-+}
-+
-+int fdt_next_subnode(const void *fdt, int offset)
-+{
-+ int depth = 1;
-+
-+ /*
-+ * With respect to the parent, the depth of the next subnode will be
-+ * the same as the last.
-+ */
-+ do {
-+ offset = fdt_next_node(fdt, offset, &depth);
-+ if (offset < 0 || depth < 1)
-+ return -FDT_ERR_NOTFOUND;
-+ } while (depth > 1);
-+
-+ return offset;
-+}
-+
-+const char *fdt_find_string_(const char *strtab, int tabsize, const char *s)
-+{
-+ int len = strlen(s) + 1;
-+ const char *last = strtab + tabsize - len;
-+ const char *p;
-+
-+ for (p = strtab; p <= last; p++)
-+ if (memcmp(p, s, len) == 0)
-+ return p;
-+ return NULL;
-+}
-+
-+int fdt_move(const void *fdt, void *buf, int bufsize)
-+{
-+ if (!can_assume(VALID_INPUT) && bufsize < 0)
-+ return -FDT_ERR_NOSPACE;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ if (fdt_totalsize(fdt) > (unsigned int)bufsize)
-+ return -FDT_ERR_NOSPACE;
-+
-+ memmove(buf, fdt, fdt_totalsize(fdt));
-+ return 0;
-+}
-diff --git a/common/libfdt/fdt_addresses.c b/common/libfdt/fdt_addresses.c
-new file mode 100644
-index 0000000..9a82cd0
---- /dev/null
-+++ b/common/libfdt/fdt_addresses.c
-@@ -0,0 +1,101 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2014 David Gibson <david@gibson.dropbear.id.au>
-+ * Copyright (C) 2018 embedded brains GmbH
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+static int fdt_cells(const void *fdt, int nodeoffset, const char *name)
-+{
-+ const fdt32_t *c;
-+ uint32_t val;
-+ int len;
-+
-+ c = fdt_getprop(fdt, nodeoffset, name, &len);
-+ if (!c)
-+ return len;
-+
-+ if (len != sizeof(*c))
-+ return -FDT_ERR_BADNCELLS;
-+
-+ val = fdt32_to_cpu(*c);
-+ if (val > FDT_MAX_NCELLS)
-+ return -FDT_ERR_BADNCELLS;
-+
-+ return (int)val;
-+}
-+
-+int fdt_address_cells(const void *fdt, int nodeoffset)
-+{
-+ int val;
-+
-+ val = fdt_cells(fdt, nodeoffset, "#address-cells");
-+ if (val == 0)
-+ return -FDT_ERR_BADNCELLS;
-+ if (val == -FDT_ERR_NOTFOUND)
-+ return 2;
-+ return val;
-+}
-+
-+int fdt_size_cells(const void *fdt, int nodeoffset)
-+{
-+ int val;
-+
-+ val = fdt_cells(fdt, nodeoffset, "#size-cells");
-+ if (val == -FDT_ERR_NOTFOUND)
-+ return 1;
-+ return val;
-+}
-+
-+/* This function assumes that [address|size]_cells is 1 or 2 */
-+int fdt_appendprop_addrrange(void *fdt, int parent, int nodeoffset,
-+ const char *name, uint64_t addr, uint64_t size)
-+{
-+ int addr_cells, size_cells, ret;
-+ uint8_t data[sizeof(fdt64_t) * 2], *prop;
-+
-+ ret = fdt_address_cells(fdt, parent);
-+ if (ret < 0)
-+ return ret;
-+ addr_cells = ret;
-+
-+ ret = fdt_size_cells(fdt, parent);
-+ if (ret < 0)
-+ return ret;
-+ size_cells = ret;
-+
-+ /* check validity of address */
-+ prop = data;
-+ if (addr_cells == 1) {
-+ if ((addr > UINT32_MAX) || ((UINT32_MAX + 1 - addr) < size))
-+ return -FDT_ERR_BADVALUE;
-+
-+ fdt32_st(prop, (uint32_t)addr);
-+ } else if (addr_cells == 2) {
-+ fdt64_st(prop, addr);
-+ } else {
-+ return -FDT_ERR_BADNCELLS;
-+ }
-+
-+ /* check validity of size */
-+ prop += addr_cells * sizeof(fdt32_t);
-+ if (size_cells == 1) {
-+ if (size > UINT32_MAX)
-+ return -FDT_ERR_BADVALUE;
-+
-+ fdt32_st(prop, (uint32_t)size);
-+ } else if (size_cells == 2) {
-+ fdt64_st(prop, size);
-+ } else {
-+ return -FDT_ERR_BADNCELLS;
-+ }
-+
-+ return fdt_appendprop(fdt, nodeoffset, name, data,
-+ (addr_cells + size_cells) * sizeof(fdt32_t));
-+}
-diff --git a/common/libfdt/fdt_check.c b/common/libfdt/fdt_check.c
-new file mode 100644
-index 0000000..fa410a8
---- /dev/null
-+++ b/common/libfdt/fdt_check.c
-@@ -0,0 +1,93 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+int fdt_check_full(const void *fdt, size_t bufsize)
-+{
-+ int err;
-+ int num_memrsv;
-+ int offset, nextoffset = 0;
-+ uint32_t tag;
-+ unsigned int depth = 0;
-+ const void *prop;
-+ const char *propname;
-+ bool expect_end = false;
-+
-+ if (bufsize < FDT_V1_SIZE)
-+ return -FDT_ERR_TRUNCATED;
-+ if (bufsize < fdt_header_size(fdt))
-+ return -FDT_ERR_TRUNCATED;
-+ err = fdt_check_header(fdt);
-+ if (err != 0)
-+ return err;
-+ if (bufsize < fdt_totalsize(fdt))
-+ return -FDT_ERR_TRUNCATED;
-+
-+ num_memrsv = fdt_num_mem_rsv(fdt);
-+ if (num_memrsv < 0)
-+ return num_memrsv;
-+
-+ while (1) {
-+ offset = nextoffset;
-+ tag = fdt_next_tag(fdt, offset, &nextoffset);
-+
-+ if (nextoffset < 0)
-+ return nextoffset;
-+
-+ /* If we see two root nodes, something is wrong */
-+ if (expect_end && tag != FDT_END)
-+ return -FDT_ERR_BADSTRUCTURE;
-+
-+ switch (tag) {
-+ case FDT_NOP:
-+ break;
-+
-+ case FDT_END:
-+ if (depth != 0)
-+ return -FDT_ERR_BADSTRUCTURE;
-+ return 0;
-+
-+ case FDT_BEGIN_NODE:
-+ depth++;
-+ if (depth > INT_MAX)
-+ return -FDT_ERR_BADSTRUCTURE;
-+
-+ /* The root node must have an empty name */
-+ if (depth == 1) {
-+ const char *name;
-+ int len;
-+
-+ name = fdt_get_name(fdt, offset, &len);
-+ if (*name || len)
-+ return -FDT_ERR_BADSTRUCTURE;
-+ }
-+ break;
-+
-+ case FDT_END_NODE:
-+ if (depth == 0)
-+ return -FDT_ERR_BADSTRUCTURE;
-+ depth--;
-+ if (depth == 0)
-+ expect_end = true;
-+ break;
-+
-+ case FDT_PROP:
-+ prop = fdt_getprop_by_offset(fdt, offset, &propname,
-+ &err);
-+ if (!prop)
-+ return err;
-+ break;
-+
-+ default:
-+ return -FDT_ERR_INTERNAL;
-+ }
-+ }
-+}
-diff --git a/common/libfdt/fdt_empty_tree.c b/common/libfdt/fdt_empty_tree.c
-new file mode 100644
-index 0000000..49d54d4
---- /dev/null
-+++ b/common/libfdt/fdt_empty_tree.c
-@@ -0,0 +1,38 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2012 David Gibson, IBM Corporation.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+int fdt_create_empty_tree(void *buf, int bufsize)
-+{
-+ int err;
-+
-+ err = fdt_create(buf, bufsize);
-+ if (err)
-+ return err;
-+
-+ err = fdt_finish_reservemap(buf);
-+ if (err)
-+ return err;
-+
-+ err = fdt_begin_node(buf, "");
-+ if (err)
-+ return err;
-+
-+ err = fdt_end_node(buf);
-+ if (err)
-+ return err;
-+
-+ err = fdt_finish(buf);
-+ if (err)
-+ return err;
-+
-+ return fdt_open_into(buf, buf, bufsize);
-+}
-diff --git a/common/libfdt/fdt_overlay.c b/common/libfdt/fdt_overlay.c
-new file mode 100644
-index 0000000..d217e79
---- /dev/null
-+++ b/common/libfdt/fdt_overlay.c
-@@ -0,0 +1,882 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2016 Free Electrons
-+ * Copyright (C) 2016 NextThing Co.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+/**
-+ * overlay_get_target_phandle - retrieves the target phandle of a fragment
-+ * @fdto: pointer to the device tree overlay blob
-+ * @fragment: node offset of the fragment in the overlay
-+ *
-+ * overlay_get_target_phandle() retrieves the target phandle of an
-+ * overlay fragment when that fragment uses a phandle (target
-+ * property) instead of a path (target-path property).
-+ *
-+ * returns:
-+ * the phandle pointed by the target property
-+ * 0, if the phandle was not found
-+ * -1, if the phandle was malformed
-+ */
-+static uint32_t overlay_get_target_phandle(const void *fdto, int fragment)
-+{
-+ const fdt32_t *val;
-+ int len;
-+
-+ val = fdt_getprop(fdto, fragment, "target", &len);
-+ if (!val)
-+ return 0;
-+
-+ if ((len != sizeof(*val)) || (fdt32_to_cpu(*val) == (uint32_t)-1))
-+ return (uint32_t)-1;
-+
-+ return fdt32_to_cpu(*val);
-+}
-+
-+/**
-+ * overlay_get_target - retrieves the offset of a fragment's target
-+ * @fdt: Base device tree blob
-+ * @fdto: Device tree overlay blob
-+ * @fragment: node offset of the fragment in the overlay
-+ * @pathp: pointer which receives the path of the target (or NULL)
-+ *
-+ * overlay_get_target() retrieves the target offset in the base
-+ * device tree of a fragment, no matter how the actual targeting is
-+ * done (through a phandle or a path)
-+ *
-+ * returns:
-+ * the targeted node offset in the base device tree
-+ * Negative error code on error
-+ */
-+static int overlay_get_target(const void *fdt, const void *fdto,
-+ int fragment, char const **pathp)
-+{
-+ uint32_t phandle;
-+ const char *path = NULL;
-+ int path_len = 0, ret;
-+
-+ /* Try first to do a phandle based lookup */
-+ phandle = overlay_get_target_phandle(fdto, fragment);
-+ if (phandle == (uint32_t)-1)
-+ return -FDT_ERR_BADPHANDLE;
-+
-+ /* no phandle, try path */
-+ if (!phandle) {
-+ /* And then a path based lookup */
-+ path = fdt_getprop(fdto, fragment, "target-path", &path_len);
-+ if (path)
-+ ret = fdt_path_offset(fdt, path);
-+ else
-+ ret = path_len;
-+ } else
-+ ret = fdt_node_offset_by_phandle(fdt, phandle);
-+
-+ /*
-+ * If we haven't found either a target or a
-+ * target-path property in a node that contains a
-+ * __overlay__ subnode (we wouldn't be called
-+ * otherwise), consider it a improperly written
-+ * overlay
-+ */
-+ if (ret < 0 && path_len == -FDT_ERR_NOTFOUND)
-+ ret = -FDT_ERR_BADOVERLAY;
-+
-+ /* return on error */
-+ if (ret < 0)
-+ return ret;
-+
-+ /* return pointer to path (if available) */
-+ if (pathp)
-+ *pathp = path ? path : NULL;
-+
-+ return ret;
-+}
-+
-+/**
-+ * overlay_phandle_add_offset - Increases a phandle by an offset
-+ * @fdt: Base device tree blob
-+ * @node: Device tree overlay blob
-+ * @name: Name of the property to modify (phandle or linux,phandle)
-+ * @delta: offset to apply
-+ *
-+ * overlay_phandle_add_offset() increments a node phandle by a given
-+ * offset.
-+ *
-+ * returns:
-+ * 0 on success.
-+ * Negative error code on error
-+ */
-+static int overlay_phandle_add_offset(void *fdt, int node,
-+ const char *name, uint32_t delta)
-+{
-+ const fdt32_t *val;
-+ uint32_t adj_val;
-+ int len;
-+
-+ val = fdt_getprop(fdt, node, name, &len);
-+ if (!val)
-+ return len;
-+
-+ if (len != sizeof(*val))
-+ return -FDT_ERR_BADPHANDLE;
-+
-+ adj_val = fdt32_to_cpu(*val);
-+ if ((adj_val + delta) < adj_val)
-+ return -FDT_ERR_NOPHANDLES;
-+
-+ adj_val += delta;
-+ if (adj_val == (uint32_t)-1)
-+ return -FDT_ERR_NOPHANDLES;
-+
-+ return fdt_setprop_inplace_u32(fdt, node, name, adj_val);
-+}
-+
-+/**
-+ * overlay_adjust_node_phandles - Offsets the phandles of a node
-+ * @fdto: Device tree overlay blob
-+ * @node: Offset of the node we want to adjust
-+ * @delta: Offset to shift the phandles of
-+ *
-+ * overlay_adjust_node_phandles() adds a constant to all the phandles
-+ * of a given node. This is mainly use as part of the overlay
-+ * application process, when we want to update all the overlay
-+ * phandles to not conflict with the overlays of the base device tree.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_adjust_node_phandles(void *fdto, int node,
-+ uint32_t delta)
-+{
-+ int child;
-+ int ret;
-+
-+ ret = overlay_phandle_add_offset(fdto, node, "phandle", delta);
-+ if (ret && ret != -FDT_ERR_NOTFOUND)
-+ return ret;
-+
-+ ret = overlay_phandle_add_offset(fdto, node, "linux,phandle", delta);
-+ if (ret && ret != -FDT_ERR_NOTFOUND)
-+ return ret;
-+
-+ fdt_for_each_subnode(child, fdto, node) {
-+ ret = overlay_adjust_node_phandles(fdto, child, delta);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ return 0;
-+}
-+
-+/**
-+ * overlay_adjust_local_phandles - Adjust the phandles of a whole overlay
-+ * @fdto: Device tree overlay blob
-+ * @delta: Offset to shift the phandles of
-+ *
-+ * overlay_adjust_local_phandles() adds a constant to all the
-+ * phandles of an overlay. This is mainly use as part of the overlay
-+ * application process, when we want to update all the overlay
-+ * phandles to not conflict with the overlays of the base device tree.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_adjust_local_phandles(void *fdto, uint32_t delta)
-+{
-+ /*
-+ * Start adjusting the phandles from the overlay root
-+ */
-+ return overlay_adjust_node_phandles(fdto, 0, delta);
-+}
-+
-+/**
-+ * overlay_update_local_node_references - Adjust the overlay references
-+ * @fdto: Device tree overlay blob
-+ * @tree_node: Node offset of the node to operate on
-+ * @fixup_node: Node offset of the matching local fixups node
-+ * @delta: Offset to shift the phandles of
-+ *
-+ * overlay_update_local_nodes_references() update the phandles
-+ * pointing to a node within the device tree overlay by adding a
-+ * constant delta.
-+ *
-+ * This is mainly used as part of a device tree application process,
-+ * where you want the device tree overlays phandles to not conflict
-+ * with the ones from the base device tree before merging them.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_update_local_node_references(void *fdto,
-+ int tree_node,
-+ int fixup_node,
-+ uint32_t delta)
-+{
-+ int fixup_prop;
-+ int fixup_child;
-+ int ret;
-+
-+ fdt_for_each_property_offset(fixup_prop, fdto, fixup_node) {
-+ const fdt32_t *fixup_val;
-+ const char *tree_val;
-+ const char *name;
-+ int fixup_len;
-+ int tree_len;
-+ int i;
-+
-+ fixup_val = fdt_getprop_by_offset(fdto, fixup_prop,
-+ &name, &fixup_len);
-+ if (!fixup_val)
-+ return fixup_len;
-+
-+ if (fixup_len % sizeof(uint32_t))
-+ return -FDT_ERR_BADOVERLAY;
-+ fixup_len /= sizeof(uint32_t);
-+
-+ tree_val = fdt_getprop(fdto, tree_node, name, &tree_len);
-+ if (!tree_val) {
-+ if (tree_len == -FDT_ERR_NOTFOUND)
-+ return -FDT_ERR_BADOVERLAY;
-+
-+ return tree_len;
-+ }
-+
-+ for (i = 0; i < fixup_len; i++) {
-+ fdt32_t adj_val;
-+ uint32_t poffset;
-+
-+ poffset = fdt32_to_cpu(fixup_val[i]);
-+
-+ /*
-+ * phandles to fixup can be unaligned.
-+ *
-+ * Use a memcpy for the architectures that do
-+ * not support unaligned accesses.
-+ */
-+ memcpy(&adj_val, tree_val + poffset, sizeof(adj_val));
-+
-+ adj_val = cpu_to_fdt32(fdt32_to_cpu(adj_val) + delta);
-+
-+ ret = fdt_setprop_inplace_namelen_partial(fdto,
-+ tree_node,
-+ name,
-+ strlen(name),
-+ poffset,
-+ &adj_val,
-+ sizeof(adj_val));
-+ if (ret == -FDT_ERR_NOSPACE)
-+ return -FDT_ERR_BADOVERLAY;
-+
-+ if (ret)
-+ return ret;
-+ }
-+ }
-+
-+ fdt_for_each_subnode(fixup_child, fdto, fixup_node) {
-+ const char *fixup_child_name = fdt_get_name(fdto, fixup_child,
-+ NULL);
-+ int tree_child;
-+
-+ tree_child = fdt_subnode_offset(fdto, tree_node,
-+ fixup_child_name);
-+ if (tree_child == -FDT_ERR_NOTFOUND)
-+ return -FDT_ERR_BADOVERLAY;
-+ if (tree_child < 0)
-+ return tree_child;
-+
-+ ret = overlay_update_local_node_references(fdto,
-+ tree_child,
-+ fixup_child,
-+ delta);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ return 0;
-+}
-+
-+/**
-+ * overlay_update_local_references - Adjust the overlay references
-+ * @fdto: Device tree overlay blob
-+ * @delta: Offset to shift the phandles of
-+ *
-+ * overlay_update_local_references() update all the phandles pointing
-+ * to a node within the device tree overlay by adding a constant
-+ * delta to not conflict with the base overlay.
-+ *
-+ * This is mainly used as part of a device tree application process,
-+ * where you want the device tree overlays phandles to not conflict
-+ * with the ones from the base device tree before merging them.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_update_local_references(void *fdto, uint32_t delta)
-+{
-+ int fixups;
-+
-+ fixups = fdt_path_offset(fdto, "/__local_fixups__");
-+ if (fixups < 0) {
-+ /* There's no local phandles to adjust, bail out */
-+ if (fixups == -FDT_ERR_NOTFOUND)
-+ return 0;
-+
-+ return fixups;
-+ }
-+
-+ /*
-+ * Update our local references from the root of the tree
-+ */
-+ return overlay_update_local_node_references(fdto, 0, fixups,
-+ delta);
-+}
-+
-+/**
-+ * overlay_fixup_one_phandle - Set an overlay phandle to the base one
-+ * @fdt: Base Device Tree blob
-+ * @fdto: Device tree overlay blob
-+ * @symbols_off: Node offset of the symbols node in the base device tree
-+ * @path: Path to a node holding a phandle in the overlay
-+ * @path_len: number of path characters to consider
-+ * @name: Name of the property holding the phandle reference in the overlay
-+ * @name_len: number of name characters to consider
-+ * @poffset: Offset within the overlay property where the phandle is stored
-+ * @label: Label of the node referenced by the phandle
-+ *
-+ * overlay_fixup_one_phandle() resolves an overlay phandle pointing to
-+ * a node in the base device tree.
-+ *
-+ * This is part of the device tree overlay application process, when
-+ * you want all the phandles in the overlay to point to the actual
-+ * base dt nodes.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_fixup_one_phandle(void *fdt, void *fdto,
-+ int symbols_off,
-+ const char *path, uint32_t path_len,
-+ const char *name, uint32_t name_len,
-+ int poffset, const char *label)
-+{
-+ const char *symbol_path;
-+ uint32_t phandle;
-+ fdt32_t phandle_prop;
-+ int symbol_off, fixup_off;
-+ int prop_len;
-+
-+ if (symbols_off < 0)
-+ return symbols_off;
-+
-+ symbol_path = fdt_getprop(fdt, symbols_off, label,
-+ &prop_len);
-+ if (!symbol_path)
-+ return prop_len;
-+
-+ symbol_off = fdt_path_offset(fdt, symbol_path);
-+ if (symbol_off < 0)
-+ return symbol_off;
-+
-+ phandle = fdt_get_phandle(fdt, symbol_off);
-+ if (!phandle)
-+ return -FDT_ERR_NOTFOUND;
-+
-+ fixup_off = fdt_path_offset_namelen(fdto, path, path_len);
-+ if (fixup_off == -FDT_ERR_NOTFOUND)
-+ return -FDT_ERR_BADOVERLAY;
-+ if (fixup_off < 0)
-+ return fixup_off;
-+
-+ phandle_prop = cpu_to_fdt32(phandle);
-+ return fdt_setprop_inplace_namelen_partial(fdto, fixup_off,
-+ name, name_len, poffset,
-+ &phandle_prop,
-+ sizeof(phandle_prop));
-+};
-+
-+/**
-+ * overlay_fixup_phandle - Set an overlay phandle to the base one
-+ * @fdt: Base Device Tree blob
-+ * @fdto: Device tree overlay blob
-+ * @symbols_off: Node offset of the symbols node in the base device tree
-+ * @property: Property offset in the overlay holding the list of fixups
-+ *
-+ * overlay_fixup_phandle() resolves all the overlay phandles pointed
-+ * to in a __fixups__ property, and updates them to match the phandles
-+ * in use in the base device tree.
-+ *
-+ * This is part of the device tree overlay application process, when
-+ * you want all the phandles in the overlay to point to the actual
-+ * base dt nodes.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_fixup_phandle(void *fdt, void *fdto, int symbols_off,
-+ int property)
-+{
-+ const char *value;
-+ const char *label;
-+ int len;
-+
-+ value = fdt_getprop_by_offset(fdto, property,
-+ &label, &len);
-+ if (!value) {
-+ if (len == -FDT_ERR_NOTFOUND)
-+ return -FDT_ERR_INTERNAL;
-+
-+ return len;
-+ }
-+
-+ do {
-+ const char *path, *name, *fixup_end;
-+ const char *fixup_str = value;
-+ uint32_t path_len, name_len;
-+ uint32_t fixup_len;
-+ char *sep, *endptr;
-+ int poffset, ret;
-+
-+ fixup_end = memchr(value, '\0', len);
-+ if (!fixup_end)
-+ return -FDT_ERR_BADOVERLAY;
-+ fixup_len = fixup_end - fixup_str;
-+
-+ len -= fixup_len + 1;
-+ value += fixup_len + 1;
-+
-+ path = fixup_str;
-+ sep = memchr(fixup_str, ':', fixup_len);
-+ if (!sep || *sep != ':')
-+ return -FDT_ERR_BADOVERLAY;
-+
-+ path_len = sep - path;
-+ if (path_len == (fixup_len - 1))
-+ return -FDT_ERR_BADOVERLAY;
-+
-+ fixup_len -= path_len + 1;
-+ name = sep + 1;
-+ sep = memchr(name, ':', fixup_len);
-+ if (!sep || *sep != ':')
-+ return -FDT_ERR_BADOVERLAY;
-+
-+ name_len = sep - name;
-+ if (!name_len)
-+ return -FDT_ERR_BADOVERLAY;
-+
-+ poffset = strtoul(sep + 1, &endptr, 10);
-+ if ((*endptr != '\0') || (endptr <= (sep + 1)))
-+ return -FDT_ERR_BADOVERLAY;
-+
-+ ret = overlay_fixup_one_phandle(fdt, fdto, symbols_off,
-+ path, path_len, name, name_len,
-+ poffset, label);
-+ if (ret)
-+ return ret;
-+ } while (len > 0);
-+
-+ return 0;
-+}
-+
-+/**
-+ * overlay_fixup_phandles - Resolve the overlay phandles to the base
-+ * device tree
-+ * @fdt: Base Device Tree blob
-+ * @fdto: Device tree overlay blob
-+ *
-+ * overlay_fixup_phandles() resolves all the overlay phandles pointing
-+ * to nodes in the base device tree.
-+ *
-+ * This is one of the steps of the device tree overlay application
-+ * process, when you want all the phandles in the overlay to point to
-+ * the actual base dt nodes.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_fixup_phandles(void *fdt, void *fdto)
-+{
-+ int fixups_off, symbols_off;
-+ int property;
-+
-+ /* We can have overlays without any fixups */
-+ fixups_off = fdt_path_offset(fdto, "/__fixups__");
-+ if (fixups_off == -FDT_ERR_NOTFOUND)
-+ return 0; /* nothing to do */
-+ if (fixups_off < 0)
-+ return fixups_off;
-+
-+ /* And base DTs without symbols */
-+ symbols_off = fdt_path_offset(fdt, "/__symbols__");
-+ if ((symbols_off < 0 && (symbols_off != -FDT_ERR_NOTFOUND)))
-+ return symbols_off;
-+
-+ fdt_for_each_property_offset(property, fdto, fixups_off) {
-+ int ret;
-+
-+ ret = overlay_fixup_phandle(fdt, fdto, symbols_off, property);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ return 0;
-+}
-+
-+/**
-+ * overlay_apply_node - Merges a node into the base device tree
-+ * @fdt: Base Device Tree blob
-+ * @target: Node offset in the base device tree to apply the fragment to
-+ * @fdto: Device tree overlay blob
-+ * @node: Node offset in the overlay holding the changes to merge
-+ *
-+ * overlay_apply_node() merges a node into a target base device tree
-+ * node pointed.
-+ *
-+ * This is part of the final step in the device tree overlay
-+ * application process, when all the phandles have been adjusted and
-+ * resolved and you just have to merge overlay into the base device
-+ * tree.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_apply_node(void *fdt, int target,
-+ void *fdto, int node)
-+{
-+ int property;
-+ int subnode;
-+
-+ fdt_for_each_property_offset(property, fdto, node) {
-+ const char *name;
-+ const void *prop;
-+ int prop_len;
-+ int ret;
-+
-+ prop = fdt_getprop_by_offset(fdto, property, &name,
-+ &prop_len);
-+ if (prop_len == -FDT_ERR_NOTFOUND)
-+ return -FDT_ERR_INTERNAL;
-+ if (prop_len < 0)
-+ return prop_len;
-+
-+ ret = fdt_setprop(fdt, target, name, prop, prop_len);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ fdt_for_each_subnode(subnode, fdto, node) {
-+ const char *name = fdt_get_name(fdto, subnode, NULL);
-+ int nnode;
-+ int ret;
-+
-+ nnode = fdt_add_subnode(fdt, target, name);
-+ if (nnode == -FDT_ERR_EXISTS) {
-+ nnode = fdt_subnode_offset(fdt, target, name);
-+ if (nnode == -FDT_ERR_NOTFOUND)
-+ return -FDT_ERR_INTERNAL;
-+ }
-+
-+ if (nnode < 0)
-+ return nnode;
-+
-+ ret = overlay_apply_node(fdt, nnode, fdto, subnode);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ return 0;
-+}
-+
-+/**
-+ * overlay_merge - Merge an overlay into its base device tree
-+ * @fdt: Base Device Tree blob
-+ * @fdto: Device tree overlay blob
-+ *
-+ * overlay_merge() merges an overlay into its base device tree.
-+ *
-+ * This is the next to last step in the device tree overlay application
-+ * process, when all the phandles have been adjusted and resolved and
-+ * you just have to merge overlay into the base device tree.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_merge(void *fdt, void *fdto)
-+{
-+ int fragment;
-+
-+ fdt_for_each_subnode(fragment, fdto, 0) {
-+ int overlay;
-+ int target;
-+ int ret;
-+
-+ /*
-+ * Each fragments will have an __overlay__ node. If
-+ * they don't, it's not supposed to be merged
-+ */
-+ overlay = fdt_subnode_offset(fdto, fragment, "__overlay__");
-+ if (overlay == -FDT_ERR_NOTFOUND)
-+ continue;
-+
-+ if (overlay < 0)
-+ return overlay;
-+
-+ target = overlay_get_target(fdt, fdto, fragment, NULL);
-+ if (target < 0)
-+ return target;
-+
-+ ret = overlay_apply_node(fdt, target, fdto, overlay);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ return 0;
-+}
-+
-+static int get_path_len(const void *fdt, int nodeoffset)
-+{
-+ int len = 0, namelen;
-+ const char *name;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ for (;;) {
-+ name = fdt_get_name(fdt, nodeoffset, &namelen);
-+ if (!name)
-+ return namelen;
-+
-+ /* root? we're done */
-+ if (namelen == 0)
-+ break;
-+
-+ nodeoffset = fdt_parent_offset(fdt, nodeoffset);
-+ if (nodeoffset < 0)
-+ return nodeoffset;
-+ len += namelen + 1;
-+ }
-+
-+ /* in case of root pretend it's "/" */
-+ if (len == 0)
-+ len++;
-+ return len;
-+}
-+
-+/**
-+ * overlay_symbol_update - Update the symbols of base tree after a merge
-+ * @fdt: Base Device Tree blob
-+ * @fdto: Device tree overlay blob
-+ *
-+ * overlay_symbol_update() updates the symbols of the base tree with the
-+ * symbols of the applied overlay
-+ *
-+ * This is the last step in the device tree overlay application
-+ * process, allowing the reference of overlay symbols by subsequent
-+ * overlay operations.
-+ *
-+ * returns:
-+ * 0 on success
-+ * Negative error code on failure
-+ */
-+static int overlay_symbol_update(void *fdt, void *fdto)
-+{
-+ int root_sym, ov_sym, prop, path_len, fragment, target;
-+ int len, frag_name_len, ret, rel_path_len;
-+ const char *s, *e;
-+ const char *path;
-+ const char *name;
-+ const char *frag_name;
-+ const char *rel_path;
-+ const char *target_path;
-+ char *buf;
-+ void *p;
-+
-+ ov_sym = fdt_subnode_offset(fdto, 0, "__symbols__");
-+
-+ /* if no overlay symbols exist no problem */
-+ if (ov_sym < 0)
-+ return 0;
-+
-+ root_sym = fdt_subnode_offset(fdt, 0, "__symbols__");
-+
-+ /* it no root symbols exist we should create them */
-+ if (root_sym == -FDT_ERR_NOTFOUND)
-+ root_sym = fdt_add_subnode(fdt, 0, "__symbols__");
-+
-+ /* any error is fatal now */
-+ if (root_sym < 0)
-+ return root_sym;
-+
-+ /* iterate over each overlay symbol */
-+ fdt_for_each_property_offset(prop, fdto, ov_sym) {
-+ path = fdt_getprop_by_offset(fdto, prop, &name, &path_len);
-+ if (!path)
-+ return path_len;
-+
-+ /* verify it's a string property (terminated by a single \0) */
-+ if (path_len < 1 || memchr(path, '\0', path_len) != &path[path_len - 1])
-+ return -FDT_ERR_BADVALUE;
-+
-+ /* keep end marker to avoid strlen() */
-+ e = path + path_len;
-+
-+ if (*path != '/')
-+ return -FDT_ERR_BADVALUE;
-+
-+ /* get fragment name first */
-+ s = strchr(path + 1, '/');
-+ if (!s) {
-+ /* Symbol refers to something that won't end
-+ * up in the target tree */
-+ continue;
-+ }
-+
-+ frag_name = path + 1;
-+ frag_name_len = s - path - 1;
-+
-+ /* verify format; safe since "s" lies in \0 terminated prop */
-+ len = sizeof("/__overlay__/") - 1;
-+ if ((e - s) > len && (memcmp(s, "/__overlay__/", len) == 0)) {
-+ /* /<fragment-name>/__overlay__/<relative-subnode-path> */
-+ rel_path = s + len;
-+ rel_path_len = e - rel_path - 1;
-+ } else if ((e - s) == len
-+ && (memcmp(s, "/__overlay__", len - 1) == 0)) {
-+ /* /<fragment-name>/__overlay__ */
-+ rel_path = "";
-+ rel_path_len = 0;
-+ } else {
-+ /* Symbol refers to something that won't end
-+ * up in the target tree */
-+ continue;
-+ }
-+
-+ /* find the fragment index in which the symbol lies */
-+ ret = fdt_subnode_offset_namelen(fdto, 0, frag_name,
-+ frag_name_len);
-+ /* not found? */
-+ if (ret < 0)
-+ return -FDT_ERR_BADOVERLAY;
-+ fragment = ret;
-+
-+ /* an __overlay__ subnode must exist */
-+ ret = fdt_subnode_offset(fdto, fragment, "__overlay__");
-+ if (ret < 0)
-+ return -FDT_ERR_BADOVERLAY;
-+
-+ /* get the target of the fragment */
-+ ret = overlay_get_target(fdt, fdto, fragment, &target_path);
-+ if (ret < 0)
-+ return ret;
-+ target = ret;
-+
-+ /* if we have a target path use */
-+ if (!target_path) {
-+ ret = get_path_len(fdt, target);
-+ if (ret < 0)
-+ return ret;
-+ len = ret;
-+ } else {
-+ len = strlen(target_path);
-+ }
-+
-+ ret = fdt_setprop_placeholder(fdt, root_sym, name,
-+ len + (len > 1) + rel_path_len + 1, &p);
-+ if (ret < 0)
-+ return ret;
-+
-+ if (!target_path) {
-+ /* again in case setprop_placeholder changed it */
-+ ret = overlay_get_target(fdt, fdto, fragment, &target_path);
-+ if (ret < 0)
-+ return ret;
-+ target = ret;
-+ }
-+
-+ buf = p;
-+ if (len > 1) { /* target is not root */
-+ if (!target_path) {
-+ ret = fdt_get_path(fdt, target, buf, len + 1);
-+ if (ret < 0)
-+ return ret;
-+ } else
-+ memcpy(buf, target_path, len + 1);
-+
-+ } else
-+ len--;
-+
-+ buf[len] = '/';
-+ memcpy(buf + len + 1, rel_path, rel_path_len);
-+ buf[len + 1 + rel_path_len] = '\0';
-+ }
-+
-+ return 0;
-+}
-+
-+int fdt_overlay_apply(void *fdt, void *fdto)
-+{
-+ uint32_t delta;
-+ int ret;
-+
-+ FDT_RO_PROBE(fdt);
-+ FDT_RO_PROBE(fdto);
-+
-+ ret = fdt_find_max_phandle(fdt, &delta);
-+ if (ret)
-+ goto err;
-+
-+ ret = overlay_adjust_local_phandles(fdto, delta);
-+ if (ret)
-+ goto err;
-+
-+ ret = overlay_update_local_references(fdto, delta);
-+ if (ret)
-+ goto err;
-+
-+ ret = overlay_fixup_phandles(fdt, fdto);
-+ if (ret)
-+ goto err;
-+
-+ ret = overlay_merge(fdt, fdto);
-+ if (ret)
-+ goto err;
-+
-+ ret = overlay_symbol_update(fdt, fdto);
-+ if (ret)
-+ goto err;
-+
-+ /*
-+ * The overlay has been damaged, erase its magic.
-+ */
-+ fdt_set_magic(fdto, ~0);
-+
-+ return 0;
-+
-+err:
-+ /*
-+ * The overlay might have been damaged, erase its magic.
-+ */
-+ fdt_set_magic(fdto, ~0);
-+
-+ /*
-+ * The base device tree might have been damaged, erase its
-+ * magic.
-+ */
-+ fdt_set_magic(fdt, ~0);
-+
-+ return ret;
-+}
-diff --git a/common/libfdt/fdt_ro.c b/common/libfdt/fdt_ro.c
-new file mode 100644
-index 0000000..17584da
---- /dev/null
-+++ b/common/libfdt/fdt_ro.c
-@@ -0,0 +1,859 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+static int fdt_nodename_eq_(const void *fdt, int offset,
-+ const char *s, int len)
-+{
-+ int olen;
-+ const char *p = fdt_get_name(fdt, offset, &olen);
-+
-+ if (!p || olen < len)
-+ /* short match */
-+ return 0;
-+
-+ if (memcmp(p, s, len) != 0)
-+ return 0;
-+
-+ if (p[len] == '\0')
-+ return 1;
-+ else if (!memchr(s, '@', len) && (p[len] == '@'))
-+ return 1;
-+ else
-+ return 0;
-+}
-+
-+const char *fdt_get_string(const void *fdt, int stroffset, int *lenp)
-+{
-+ int32_t totalsize;
-+ uint32_t absoffset;
-+ size_t len;
-+ int err;
-+ const char *s, *n;
-+
-+ if (can_assume(VALID_INPUT)) {
-+ s = (const char *)fdt + fdt_off_dt_strings(fdt) + stroffset;
-+
-+ if (lenp)
-+ *lenp = strlen(s);
-+ return s;
-+ }
-+ totalsize = fdt_ro_probe_(fdt);
-+ err = totalsize;
-+ if (totalsize < 0)
-+ goto fail;
-+
-+ err = -FDT_ERR_BADOFFSET;
-+ absoffset = stroffset + fdt_off_dt_strings(fdt);
-+ if (absoffset >= (unsigned)totalsize)
-+ goto fail;
-+ len = totalsize - absoffset;
-+
-+ if (fdt_magic(fdt) == FDT_MAGIC) {
-+ if (stroffset < 0)
-+ goto fail;
-+ if (can_assume(LATEST) || fdt_version(fdt) >= 17) {
-+ if ((unsigned)stroffset >= fdt_size_dt_strings(fdt))
-+ goto fail;
-+ if ((fdt_size_dt_strings(fdt) - stroffset) < len)
-+ len = fdt_size_dt_strings(fdt) - stroffset;
-+ }
-+ } else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
-+ unsigned int sw_stroffset = -stroffset;
-+
-+ if ((stroffset >= 0) ||
-+ (sw_stroffset > fdt_size_dt_strings(fdt)))
-+ goto fail;
-+ if (sw_stroffset < len)
-+ len = sw_stroffset;
-+ } else {
-+ err = -FDT_ERR_INTERNAL;
-+ goto fail;
-+ }
-+
-+ s = (const char *)fdt + absoffset;
-+ n = memchr(s, '\0', len);
-+ if (!n) {
-+ /* missing terminating NULL */
-+ err = -FDT_ERR_TRUNCATED;
-+ goto fail;
-+ }
-+
-+ if (lenp)
-+ *lenp = n - s;
-+ return s;
-+
-+fail:
-+ if (lenp)
-+ *lenp = err;
-+ return NULL;
-+}
-+
-+const char *fdt_string(const void *fdt, int stroffset)
-+{
-+ return fdt_get_string(fdt, stroffset, NULL);
-+}
-+
-+static int fdt_string_eq_(const void *fdt, int stroffset,
-+ const char *s, int len)
-+{
-+ int slen;
-+ const char *p = fdt_get_string(fdt, stroffset, &slen);
-+
-+ return p && (slen == len) && (memcmp(p, s, len) == 0);
-+}
-+
-+int fdt_find_max_phandle(const void *fdt, uint32_t *phandle)
-+{
-+ uint32_t max = 0;
-+ int offset = -1;
-+
-+ while (true) {
-+ uint32_t value;
-+
-+ offset = fdt_next_node(fdt, offset, NULL);
-+ if (offset < 0) {
-+ if (offset == -FDT_ERR_NOTFOUND)
-+ break;
-+
-+ return offset;
-+ }
-+
-+ value = fdt_get_phandle(fdt, offset);
-+
-+ if (value > max)
-+ max = value;
-+ }
-+
-+ if (phandle)
-+ *phandle = max;
-+
-+ return 0;
-+}
-+
-+int fdt_generate_phandle(const void *fdt, uint32_t *phandle)
-+{
-+ uint32_t max;
-+ int err;
-+
-+ err = fdt_find_max_phandle(fdt, &max);
-+ if (err < 0)
-+ return err;
-+
-+ if (max == FDT_MAX_PHANDLE)
-+ return -FDT_ERR_NOPHANDLES;
-+
-+ if (phandle)
-+ *phandle = max + 1;
-+
-+ return 0;
-+}
-+
-+static const struct fdt_reserve_entry *fdt_mem_rsv(const void *fdt, int n)
-+{
-+ unsigned int offset = n * sizeof(struct fdt_reserve_entry);
-+ unsigned int absoffset = fdt_off_mem_rsvmap(fdt) + offset;
-+
-+ if (!can_assume(VALID_INPUT)) {
-+ if (absoffset < fdt_off_mem_rsvmap(fdt))
-+ return NULL;
-+ if (absoffset > fdt_totalsize(fdt) -
-+ sizeof(struct fdt_reserve_entry))
-+ return NULL;
-+ }
-+ return fdt_mem_rsv_(fdt, n);
-+}
-+
-+int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size)
-+{
-+ const struct fdt_reserve_entry *re;
-+
-+ FDT_RO_PROBE(fdt);
-+ re = fdt_mem_rsv(fdt, n);
-+ if (!can_assume(VALID_INPUT) && !re)
-+ return -FDT_ERR_BADOFFSET;
-+
-+ *address = fdt64_ld_(&re->address);
-+ *size = fdt64_ld_(&re->size);
-+ return 0;
-+}
-+
-+int fdt_num_mem_rsv(const void *fdt)
-+{
-+ int i;
-+ const struct fdt_reserve_entry *re;
-+
-+ for (i = 0; (re = fdt_mem_rsv(fdt, i)) != NULL; i++) {
-+ if (fdt64_ld_(&re->size) == 0)
-+ return i;
-+ }
-+ return -FDT_ERR_TRUNCATED;
-+}
-+
-+static int nextprop_(const void *fdt, int offset)
-+{
-+ uint32_t tag;
-+ int nextoffset;
-+
-+ do {
-+ tag = fdt_next_tag(fdt, offset, &nextoffset);
-+
-+ switch (tag) {
-+ case FDT_END:
-+ if (nextoffset >= 0)
-+ return -FDT_ERR_BADSTRUCTURE;
-+ else
-+ return nextoffset;
-+
-+ case FDT_PROP:
-+ return offset;
-+ }
-+ offset = nextoffset;
-+ } while (tag == FDT_NOP);
-+
-+ return -FDT_ERR_NOTFOUND;
-+}
-+
-+int fdt_subnode_offset_namelen(const void *fdt, int offset,
-+ const char *name, int namelen)
-+{
-+ int depth;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ for (depth = 0;
-+ (offset >= 0) && (depth >= 0);
-+ offset = fdt_next_node(fdt, offset, &depth))
-+ if ((depth == 1)
-+ && fdt_nodename_eq_(fdt, offset, name, namelen))
-+ return offset;
-+
-+ if (depth < 0)
-+ return -FDT_ERR_NOTFOUND;
-+ return offset; /* error */
-+}
-+
-+int fdt_subnode_offset(const void *fdt, int parentoffset,
-+ const char *name)
-+{
-+ return fdt_subnode_offset_namelen(fdt, parentoffset, name, strlen(name));
-+}
-+
-+int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen)
-+{
-+ const char *end = path + namelen;
-+ const char *p = path;
-+ int offset = 0;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ /* see if we have an alias */
-+ if (*path != '/') {
-+ const char *q = memchr(path, '/', end - p);
-+
-+ if (!q)
-+ q = end;
-+
-+ p = fdt_get_alias_namelen(fdt, p, q - p);
-+ if (!p)
-+ return -FDT_ERR_BADPATH;
-+ offset = fdt_path_offset(fdt, p);
-+
-+ p = q;
-+ }
-+
-+ while (p < end) {
-+ const char *q;
-+
-+ while (*p == '/') {
-+ p++;
-+ if (p == end)
-+ return offset;
-+ }
-+ q = memchr(p, '/', end - p);
-+ if (! q)
-+ q = end;
-+
-+ offset = fdt_subnode_offset_namelen(fdt, offset, p, q-p);
-+ if (offset < 0)
-+ return offset;
-+
-+ p = q;
-+ }
-+
-+ return offset;
-+}
-+
-+int fdt_path_offset(const void *fdt, const char *path)
-+{
-+ return fdt_path_offset_namelen(fdt, path, strlen(path));
-+}
-+
-+const char *fdt_get_name(const void *fdt, int nodeoffset, int *len)
-+{
-+ const struct fdt_node_header *nh = fdt_offset_ptr_(fdt, nodeoffset);
-+ const char *nameptr;
-+ int err;
-+
-+ if (((err = fdt_ro_probe_(fdt)) < 0)
-+ || ((err = fdt_check_node_offset_(fdt, nodeoffset)) < 0))
-+ goto fail;
-+
-+ nameptr = nh->name;
-+
-+ if (!can_assume(LATEST) && fdt_version(fdt) < 0x10) {
-+ /*
-+ * For old FDT versions, match the naming conventions of V16:
-+ * give only the leaf name (after all /). The actual tree
-+ * contents are loosely checked.
-+ */
-+ const char *leaf;
-+ leaf = strrchr(nameptr, '/');
-+ if (leaf == NULL) {
-+ err = -FDT_ERR_BADSTRUCTURE;
-+ goto fail;
-+ }
-+ nameptr = leaf+1;
-+ }
-+
-+ if (len)
-+ *len = strlen(nameptr);
-+
-+ return nameptr;
-+
-+ fail:
-+ if (len)
-+ *len = err;
-+ return NULL;
-+}
-+
-+int fdt_first_property_offset(const void *fdt, int nodeoffset)
-+{
-+ int offset;
-+
-+ if ((offset = fdt_check_node_offset_(fdt, nodeoffset)) < 0)
-+ return offset;
-+
-+ return nextprop_(fdt, offset);
-+}
-+
-+int fdt_next_property_offset(const void *fdt, int offset)
-+{
-+ if ((offset = fdt_check_prop_offset_(fdt, offset)) < 0)
-+ return offset;
-+
-+ return nextprop_(fdt, offset);
-+}
-+
-+static const struct fdt_property *fdt_get_property_by_offset_(const void *fdt,
-+ int offset,
-+ int *lenp)
-+{
-+ int err;
-+ const struct fdt_property *prop;
-+
-+ if (!can_assume(VALID_INPUT) &&
-+ (err = fdt_check_prop_offset_(fdt, offset)) < 0) {
-+ if (lenp)
-+ *lenp = err;
-+ return NULL;
-+ }
-+
-+ prop = fdt_offset_ptr_(fdt, offset);
-+
-+ if (lenp)
-+ *lenp = fdt32_ld_(&prop->len);
-+
-+ return prop;
-+}
-+
-+const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
-+ int offset,
-+ int *lenp)
-+{
-+ /* Prior to version 16, properties may need realignment
-+ * and this API does not work. fdt_getprop_*() will, however. */
-+
-+ if (!can_assume(LATEST) && fdt_version(fdt) < 0x10) {
-+ if (lenp)
-+ *lenp = -FDT_ERR_BADVERSION;
-+ return NULL;
-+ }
-+
-+ return fdt_get_property_by_offset_(fdt, offset, lenp);
-+}
-+
-+static const struct fdt_property *fdt_get_property_namelen_(const void *fdt,
-+ int offset,
-+ const char *name,
-+ int namelen,
-+ int *lenp,
-+ int *poffset)
-+{
-+ for (offset = fdt_first_property_offset(fdt, offset);
-+ (offset >= 0);
-+ (offset = fdt_next_property_offset(fdt, offset))) {
-+ const struct fdt_property *prop;
-+
-+ prop = fdt_get_property_by_offset_(fdt, offset, lenp);
-+ if (!can_assume(LIBFDT_FLAWLESS) && !prop) {
-+ offset = -FDT_ERR_INTERNAL;
-+ break;
-+ }
-+ if (fdt_string_eq_(fdt, fdt32_ld_(&prop->nameoff),
-+ name, namelen)) {
-+ if (poffset)
-+ *poffset = offset;
-+ return prop;
-+ }
-+ }
-+
-+ if (lenp)
-+ *lenp = offset;
-+ return NULL;
-+}
-+
-+
-+const struct fdt_property *fdt_get_property_namelen(const void *fdt,
-+ int offset,
-+ const char *name,
-+ int namelen, int *lenp)
-+{
-+ /* Prior to version 16, properties may need realignment
-+ * and this API does not work. fdt_getprop_*() will, however. */
-+ if (!can_assume(LATEST) && fdt_version(fdt) < 0x10) {
-+ if (lenp)
-+ *lenp = -FDT_ERR_BADVERSION;
-+ return NULL;
-+ }
-+
-+ return fdt_get_property_namelen_(fdt, offset, name, namelen, lenp,
-+ NULL);
-+}
-+
-+
-+const struct fdt_property *fdt_get_property(const void *fdt,
-+ int nodeoffset,
-+ const char *name, int *lenp)
-+{
-+ return fdt_get_property_namelen(fdt, nodeoffset, name,
-+ strlen(name), lenp);
-+}
-+
-+const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
-+ const char *name, int namelen, int *lenp)
-+{
-+ int poffset;
-+ const struct fdt_property *prop;
-+
-+ prop = fdt_get_property_namelen_(fdt, nodeoffset, name, namelen, lenp,
-+ &poffset);
-+ if (!prop)
-+ return NULL;
-+
-+ /* Handle realignment */
-+ if (!can_assume(LATEST) && fdt_version(fdt) < 0x10 &&
-+ (poffset + sizeof(*prop)) % 8 && fdt32_ld_(&prop->len) >= 8)
-+ return prop->data + 4;
-+ return prop->data;
-+}
-+
-+const void *fdt_getprop_by_offset(const void *fdt, int offset,
-+ const char **namep, int *lenp)
-+{
-+ const struct fdt_property *prop;
-+
-+ prop = fdt_get_property_by_offset_(fdt, offset, lenp);
-+ if (!prop)
-+ return NULL;
-+ if (namep) {
-+ const char *name;
-+ int namelen;
-+
-+ if (!can_assume(VALID_INPUT)) {
-+ name = fdt_get_string(fdt, fdt32_ld_(&prop->nameoff),
-+ &namelen);
-+ if (!name) {
-+ if (lenp)
-+ *lenp = namelen;
-+ return NULL;
-+ }
-+ *namep = name;
-+ } else {
-+ *namep = fdt_string(fdt, fdt32_ld_(&prop->nameoff));
-+ }
-+ }
-+
-+ /* Handle realignment */
-+ if (!can_assume(LATEST) && fdt_version(fdt) < 0x10 &&
-+ (offset + sizeof(*prop)) % 8 && fdt32_ld_(&prop->len) >= 8)
-+ return prop->data + 4;
-+ return prop->data;
-+}
-+
-+const void *fdt_getprop(const void *fdt, int nodeoffset,
-+ const char *name, int *lenp)
-+{
-+ return fdt_getprop_namelen(fdt, nodeoffset, name, strlen(name), lenp);
-+}
-+
-+uint32_t fdt_get_phandle(const void *fdt, int nodeoffset)
-+{
-+ const fdt32_t *php;
-+ int len;
-+
-+ /* FIXME: This is a bit sub-optimal, since we potentially scan
-+ * over all the properties twice. */
-+ php = fdt_getprop(fdt, nodeoffset, "phandle", &len);
-+ if (!php || (len != sizeof(*php))) {
-+ php = fdt_getprop(fdt, nodeoffset, "linux,phandle", &len);
-+ if (!php || (len != sizeof(*php)))
-+ return 0;
-+ }
-+
-+ return fdt32_ld_(php);
-+}
-+
-+const char *fdt_get_alias_namelen(const void *fdt,
-+ const char *name, int namelen)
-+{
-+ int aliasoffset;
-+
-+ aliasoffset = fdt_path_offset(fdt, "/aliases");
-+ if (aliasoffset < 0)
-+ return NULL;
-+
-+ return fdt_getprop_namelen(fdt, aliasoffset, name, namelen, NULL);
-+}
-+
-+const char *fdt_get_alias(const void *fdt, const char *name)
-+{
-+ return fdt_get_alias_namelen(fdt, name, strlen(name));
-+}
-+
-+int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen)
-+{
-+ int pdepth = 0, p = 0;
-+ int offset, depth, namelen;
-+ const char *name;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ if (buflen < 2)
-+ return -FDT_ERR_NOSPACE;
-+
-+ for (offset = 0, depth = 0;
-+ (offset >= 0) && (offset <= nodeoffset);
-+ offset = fdt_next_node(fdt, offset, &depth)) {
-+ while (pdepth > depth) {
-+ do {
-+ p--;
-+ } while (buf[p-1] != '/');
-+ pdepth--;
-+ }
-+
-+ if (pdepth >= depth) {
-+ name = fdt_get_name(fdt, offset, &namelen);
-+ if (!name)
-+ return namelen;
-+ if ((p + namelen + 1) <= buflen) {
-+ memcpy(buf + p, name, namelen);
-+ p += namelen;
-+ buf[p++] = '/';
-+ pdepth++;
-+ }
-+ }
-+
-+ if (offset == nodeoffset) {
-+ if (pdepth < (depth + 1))
-+ return -FDT_ERR_NOSPACE;
-+
-+ if (p > 1) /* special case so that root path is "/", not "" */
-+ p--;
-+ buf[p] = '\0';
-+ return 0;
-+ }
-+ }
-+
-+ if ((offset == -FDT_ERR_NOTFOUND) || (offset >= 0))
-+ return -FDT_ERR_BADOFFSET;
-+ else if (offset == -FDT_ERR_BADOFFSET)
-+ return -FDT_ERR_BADSTRUCTURE;
-+
-+ return offset; /* error from fdt_next_node() */
-+}
-+
-+int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,
-+ int supernodedepth, int *nodedepth)
-+{
-+ int offset, depth;
-+ int supernodeoffset = -FDT_ERR_INTERNAL;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ if (supernodedepth < 0)
-+ return -FDT_ERR_NOTFOUND;
-+
-+ for (offset = 0, depth = 0;
-+ (offset >= 0) && (offset <= nodeoffset);
-+ offset = fdt_next_node(fdt, offset, &depth)) {
-+ if (depth == supernodedepth)
-+ supernodeoffset = offset;
-+
-+ if (offset == nodeoffset) {
-+ if (nodedepth)
-+ *nodedepth = depth;
-+
-+ if (supernodedepth > depth)
-+ return -FDT_ERR_NOTFOUND;
-+ else
-+ return supernodeoffset;
-+ }
-+ }
-+
-+ if (!can_assume(VALID_INPUT)) {
-+ if ((offset == -FDT_ERR_NOTFOUND) || (offset >= 0))
-+ return -FDT_ERR_BADOFFSET;
-+ else if (offset == -FDT_ERR_BADOFFSET)
-+ return -FDT_ERR_BADSTRUCTURE;
-+ }
-+
-+ return offset; /* error from fdt_next_node() */
-+}
-+
-+int fdt_node_depth(const void *fdt, int nodeoffset)
-+{
-+ int nodedepth;
-+ int err;
-+
-+ err = fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, &nodedepth);
-+ if (err)
-+ return (can_assume(LIBFDT_FLAWLESS) || err < 0) ? err :
-+ -FDT_ERR_INTERNAL;
-+ return nodedepth;
-+}
-+
-+int fdt_parent_offset(const void *fdt, int nodeoffset)
-+{
-+ int nodedepth = fdt_node_depth(fdt, nodeoffset);
-+
-+ if (nodedepth < 0)
-+ return nodedepth;
-+ return fdt_supernode_atdepth_offset(fdt, nodeoffset,
-+ nodedepth - 1, NULL);
-+}
-+
-+int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,
-+ const char *propname,
-+ const void *propval, int proplen)
-+{
-+ int offset;
-+ const void *val;
-+ int len;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ /* FIXME: The algorithm here is pretty horrible: we scan each
-+ * property of a node in fdt_getprop(), then if that didn't
-+ * find what we want, we scan over them again making our way
-+ * to the next node. Still it's the easiest to implement
-+ * approach; performance can come later. */
-+ for (offset = fdt_next_node(fdt, startoffset, NULL);
-+ offset >= 0;
-+ offset = fdt_next_node(fdt, offset, NULL)) {
-+ val = fdt_getprop(fdt, offset, propname, &len);
-+ if (val && (len == proplen)
-+ && (memcmp(val, propval, len) == 0))
-+ return offset;
-+ }
-+
-+ return offset; /* error from fdt_next_node() */
-+}
-+
-+int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle)
-+{
-+ int offset;
-+
-+ if ((phandle == 0) || (phandle == ~0U))
-+ return -FDT_ERR_BADPHANDLE;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ /* FIXME: The algorithm here is pretty horrible: we
-+ * potentially scan each property of a node in
-+ * fdt_get_phandle(), then if that didn't find what
-+ * we want, we scan over them again making our way to the next
-+ * node. Still it's the easiest to implement approach;
-+ * performance can come later. */
-+ for (offset = fdt_next_node(fdt, -1, NULL);
-+ offset >= 0;
-+ offset = fdt_next_node(fdt, offset, NULL)) {
-+ if (fdt_get_phandle(fdt, offset) == phandle)
-+ return offset;
-+ }
-+
-+ return offset; /* error from fdt_next_node() */
-+}
-+
-+int fdt_stringlist_contains(const char *strlist, int listlen, const char *str)
-+{
-+ int len = strlen(str);
-+ const char *p;
-+
-+ while (listlen >= len) {
-+ if (memcmp(str, strlist, len+1) == 0)
-+ return 1;
-+ p = memchr(strlist, '\0', listlen);
-+ if (!p)
-+ return 0; /* malformed strlist.. */
-+ listlen -= (p-strlist) + 1;
-+ strlist = p + 1;
-+ }
-+ return 0;
-+}
-+
-+int fdt_stringlist_count(const void *fdt, int nodeoffset, const char *property)
-+{
-+ const char *list, *end;
-+ int length, count = 0;
-+
-+ list = fdt_getprop(fdt, nodeoffset, property, &length);
-+ if (!list)
-+ return length;
-+
-+ end = list + length;
-+
-+ while (list < end) {
-+ length = strnlen(list, end - list) + 1;
-+
-+ /* Abort if the last string isn't properly NUL-terminated. */
-+ if (list + length > end)
-+ return -FDT_ERR_BADVALUE;
-+
-+ list += length;
-+ count++;
-+ }
-+
-+ return count;
-+}
-+
-+int fdt_stringlist_search(const void *fdt, int nodeoffset, const char *property,
-+ const char *string)
-+{
-+ int length, len, idx = 0;
-+ const char *list, *end;
-+
-+ list = fdt_getprop(fdt, nodeoffset, property, &length);
-+ if (!list)
-+ return length;
-+
-+ len = strlen(string) + 1;
-+ end = list + length;
-+
-+ while (list < end) {
-+ length = strnlen(list, end - list) + 1;
-+
-+ /* Abort if the last string isn't properly NUL-terminated. */
-+ if (list + length > end)
-+ return -FDT_ERR_BADVALUE;
-+
-+ if (length == len && memcmp(list, string, length) == 0)
-+ return idx;
-+
-+ list += length;
-+ idx++;
-+ }
-+
-+ return -FDT_ERR_NOTFOUND;
-+}
-+
-+const char *fdt_stringlist_get(const void *fdt, int nodeoffset,
-+ const char *property, int idx,
-+ int *lenp)
-+{
-+ const char *list, *end;
-+ int length;
-+
-+ list = fdt_getprop(fdt, nodeoffset, property, &length);
-+ if (!list) {
-+ if (lenp)
-+ *lenp = length;
-+
-+ return NULL;
-+ }
-+
-+ end = list + length;
-+
-+ while (list < end) {
-+ length = strnlen(list, end - list) + 1;
-+
-+ /* Abort if the last string isn't properly NUL-terminated. */
-+ if (list + length > end) {
-+ if (lenp)
-+ *lenp = -FDT_ERR_BADVALUE;
-+
-+ return NULL;
-+ }
-+
-+ if (idx == 0) {
-+ if (lenp)
-+ *lenp = length - 1;
-+
-+ return list;
-+ }
-+
-+ list += length;
-+ idx--;
-+ }
-+
-+ if (lenp)
-+ *lenp = -FDT_ERR_NOTFOUND;
-+
-+ return NULL;
-+}
-+
-+int fdt_node_check_compatible(const void *fdt, int nodeoffset,
-+ const char *compatible)
-+{
-+ const void *prop;
-+ int len;
-+
-+ prop = fdt_getprop(fdt, nodeoffset, "compatible", &len);
-+ if (!prop)
-+ return len;
-+
-+ return !fdt_stringlist_contains(prop, len, compatible);
-+}
-+
-+int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
-+ const char *compatible)
-+{
-+ int offset, err;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ /* FIXME: The algorithm here is pretty horrible: we scan each
-+ * property of a node in fdt_node_check_compatible(), then if
-+ * that didn't find what we want, we scan over them again
-+ * making our way to the next node. Still it's the easiest to
-+ * implement approach; performance can come later. */
-+ for (offset = fdt_next_node(fdt, startoffset, NULL);
-+ offset >= 0;
-+ offset = fdt_next_node(fdt, offset, NULL)) {
-+ err = fdt_node_check_compatible(fdt, offset, compatible);
-+ if ((err < 0) && (err != -FDT_ERR_NOTFOUND))
-+ return err;
-+ else if (err == 0)
-+ return offset;
-+ }
-+
-+ return offset; /* error from fdt_next_node() */
-+}
-diff --git a/common/libfdt/fdt_rw.c b/common/libfdt/fdt_rw.c
-new file mode 100644
-index 0000000..3621d36
---- /dev/null
-+++ b/common/libfdt/fdt_rw.c
-@@ -0,0 +1,500 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+static int fdt_blocks_misordered_(const void *fdt,
-+ int mem_rsv_size, int struct_size)
-+{
-+ return (fdt_off_mem_rsvmap(fdt) < FDT_ALIGN(sizeof(struct fdt_header), 8))
-+ || (fdt_off_dt_struct(fdt) <
-+ (fdt_off_mem_rsvmap(fdt) + mem_rsv_size))
-+ || (fdt_off_dt_strings(fdt) <
-+ (fdt_off_dt_struct(fdt) + struct_size))
-+ || (fdt_totalsize(fdt) <
-+ (fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt)));
-+}
-+
-+static int fdt_rw_probe_(void *fdt)
-+{
-+ if (can_assume(VALID_DTB))
-+ return 0;
-+ FDT_RO_PROBE(fdt);
-+
-+ if (!can_assume(LATEST) && fdt_version(fdt) < 17)
-+ return -FDT_ERR_BADVERSION;
-+ if (fdt_blocks_misordered_(fdt, sizeof(struct fdt_reserve_entry),
-+ fdt_size_dt_struct(fdt)))
-+ return -FDT_ERR_BADLAYOUT;
-+ if (!can_assume(LATEST) && fdt_version(fdt) > 17)
-+ fdt_set_version(fdt, 17);
-+
-+ return 0;
-+}
-+
-+#define FDT_RW_PROBE(fdt) \
-+ { \
-+ int err_; \
-+ if ((err_ = fdt_rw_probe_(fdt)) != 0) \
-+ return err_; \
-+ }
-+
-+static inline unsigned int fdt_data_size_(void *fdt)
-+{
-+ return fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt);
-+}
-+
-+static int fdt_splice_(void *fdt, void *splicepoint, int oldlen, int newlen)
-+{
-+ char *p = splicepoint;
-+ unsigned int dsize = fdt_data_size_(fdt);
-+ size_t soff = p - (char *)fdt;
-+
-+ if ((oldlen < 0) || (soff + oldlen < soff) || (soff + oldlen > dsize))
-+ return -FDT_ERR_BADOFFSET;
-+ if ((p < (char *)fdt) || (dsize + newlen < (unsigned)oldlen))
-+ return -FDT_ERR_BADOFFSET;
-+ if (dsize - oldlen + newlen > fdt_totalsize(fdt))
-+ return -FDT_ERR_NOSPACE;
-+ memmove(p + newlen, p + oldlen, ((char *)fdt + dsize) - (p + oldlen));
-+ return 0;
-+}
-+
-+static int fdt_splice_mem_rsv_(void *fdt, struct fdt_reserve_entry *p,
-+ int oldn, int newn)
-+{
-+ int delta = (newn - oldn) * sizeof(*p);
-+ int err;
-+ err = fdt_splice_(fdt, p, oldn * sizeof(*p), newn * sizeof(*p));
-+ if (err)
-+ return err;
-+ fdt_set_off_dt_struct(fdt, fdt_off_dt_struct(fdt) + delta);
-+ fdt_set_off_dt_strings(fdt, fdt_off_dt_strings(fdt) + delta);
-+ return 0;
-+}
-+
-+static int fdt_splice_struct_(void *fdt, void *p,
-+ int oldlen, int newlen)
-+{
-+ int delta = newlen - oldlen;
-+ int err;
-+
-+ if ((err = fdt_splice_(fdt, p, oldlen, newlen)))
-+ return err;
-+
-+ fdt_set_size_dt_struct(fdt, fdt_size_dt_struct(fdt) + delta);
-+ fdt_set_off_dt_strings(fdt, fdt_off_dt_strings(fdt) + delta);
-+ return 0;
-+}
-+
-+/* Must only be used to roll back in case of error */
-+static void fdt_del_last_string_(void *fdt, const char *s)
-+{
-+ int newlen = strlen(s) + 1;
-+
-+ fdt_set_size_dt_strings(fdt, fdt_size_dt_strings(fdt) - newlen);
-+}
-+
-+static int fdt_splice_string_(void *fdt, int newlen)
-+{
-+ void *p = (char *)fdt
-+ + fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt);
-+ int err;
-+
-+ if ((err = fdt_splice_(fdt, p, 0, newlen)))
-+ return err;
-+
-+ fdt_set_size_dt_strings(fdt, fdt_size_dt_strings(fdt) + newlen);
-+ return 0;
-+}
-+
-+/**
-+ * fdt_find_add_string_() - Find or allocate a string
-+ *
-+ * @fdt: pointer to the device tree to check/adjust
-+ * @s: string to find/add
-+ * @allocated: Set to 0 if the string was found, 1 if not found and so
-+ * allocated. Ignored if can_assume(NO_ROLLBACK)
-+ * @return offset of string in the string table (whether found or added)
-+ */
-+static int fdt_find_add_string_(void *fdt, const char *s, int *allocated)
-+{
-+ char *strtab = (char *)fdt + fdt_off_dt_strings(fdt);
-+ const char *p;
-+ char *new;
-+ int len = strlen(s) + 1;
-+ int err;
-+
-+ if (!can_assume(NO_ROLLBACK))
-+ *allocated = 0;
-+
-+ p = fdt_find_string_(strtab, fdt_size_dt_strings(fdt), s);
-+ if (p)
-+ /* found it */
-+ return (p - strtab);
-+
-+ new = strtab + fdt_size_dt_strings(fdt);
-+ err = fdt_splice_string_(fdt, len);
-+ if (err)
-+ return err;
-+
-+ if (!can_assume(NO_ROLLBACK))
-+ *allocated = 1;
-+
-+ memcpy(new, s, len);
-+ return (new - strtab);
-+}
-+
-+int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size)
-+{
-+ struct fdt_reserve_entry *re;
-+ int err;
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ re = fdt_mem_rsv_w_(fdt, fdt_num_mem_rsv(fdt));
-+ err = fdt_splice_mem_rsv_(fdt, re, 0, 1);
-+ if (err)
-+ return err;
-+
-+ re->address = cpu_to_fdt64(address);
-+ re->size = cpu_to_fdt64(size);
-+ return 0;
-+}
-+
-+int fdt_del_mem_rsv(void *fdt, int n)
-+{
-+ struct fdt_reserve_entry *re = fdt_mem_rsv_w_(fdt, n);
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ if (n >= fdt_num_mem_rsv(fdt))
-+ return -FDT_ERR_NOTFOUND;
-+
-+ return fdt_splice_mem_rsv_(fdt, re, 1, 0);
-+}
-+
-+static int fdt_resize_property_(void *fdt, int nodeoffset, const char *name,
-+ int len, struct fdt_property **prop)
-+{
-+ int oldlen;
-+ int err;
-+
-+ *prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
-+ if (!*prop)
-+ return oldlen;
-+
-+ if ((err = fdt_splice_struct_(fdt, (*prop)->data, FDT_TAGALIGN(oldlen),
-+ FDT_TAGALIGN(len))))
-+ return err;
-+
-+ (*prop)->len = cpu_to_fdt32(len);
-+ return 0;
-+}
-+
-+static int fdt_add_property_(void *fdt, int nodeoffset, const char *name,
-+ int len, struct fdt_property **prop)
-+{
-+ int proplen;
-+ int nextoffset;
-+ int namestroff;
-+ int err;
-+ int allocated;
-+
-+ if ((nextoffset = fdt_check_node_offset_(fdt, nodeoffset)) < 0)
-+ return nextoffset;
-+
-+ namestroff = fdt_find_add_string_(fdt, name, &allocated);
-+ if (namestroff < 0)
-+ return namestroff;
-+
-+ *prop = fdt_offset_ptr_w_(fdt, nextoffset);
-+ proplen = sizeof(**prop) + FDT_TAGALIGN(len);
-+
-+ err = fdt_splice_struct_(fdt, *prop, 0, proplen);
-+ if (err) {
-+ /* Delete the string if we failed to add it */
-+ if (!can_assume(NO_ROLLBACK) && allocated)
-+ fdt_del_last_string_(fdt, name);
-+ return err;
-+ }
-+
-+ (*prop)->tag = cpu_to_fdt32(FDT_PROP);
-+ (*prop)->nameoff = cpu_to_fdt32(namestroff);
-+ (*prop)->len = cpu_to_fdt32(len);
-+ return 0;
-+}
-+
-+int fdt_set_name(void *fdt, int nodeoffset, const char *name)
-+{
-+ char *namep;
-+ int oldlen, newlen;
-+ int err;
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ namep = (char *)(uintptr_t)fdt_get_name(fdt, nodeoffset, &oldlen);
-+ if (!namep)
-+ return oldlen;
-+
-+ newlen = strlen(name);
-+
-+ err = fdt_splice_struct_(fdt, namep, FDT_TAGALIGN(oldlen+1),
-+ FDT_TAGALIGN(newlen+1));
-+ if (err)
-+ return err;
-+
-+ memcpy(namep, name, newlen+1);
-+ return 0;
-+}
-+
-+int fdt_setprop_placeholder(void *fdt, int nodeoffset, const char *name,
-+ int len, void **prop_data)
-+{
-+ struct fdt_property *prop;
-+ int err;
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ err = fdt_resize_property_(fdt, nodeoffset, name, len, &prop);
-+ if (err == -FDT_ERR_NOTFOUND)
-+ err = fdt_add_property_(fdt, nodeoffset, name, len, &prop);
-+ if (err)
-+ return err;
-+
-+ *prop_data = prop->data;
-+ return 0;
-+}
-+
-+int fdt_setprop(void *fdt, int nodeoffset, const char *name,
-+ const void *val, int len)
-+{
-+ void *prop_data;
-+ int err;
-+
-+ err = fdt_setprop_placeholder(fdt, nodeoffset, name, len, &prop_data);
-+ if (err)
-+ return err;
-+
-+ if (len)
-+ memcpy(prop_data, val, len);
-+ return 0;
-+}
-+
-+int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
-+ const void *val, int len)
-+{
-+ struct fdt_property *prop;
-+ int err, oldlen, newlen;
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
-+ if (prop) {
-+ newlen = len + oldlen;
-+ err = fdt_splice_struct_(fdt, prop->data,
-+ FDT_TAGALIGN(oldlen),
-+ FDT_TAGALIGN(newlen));
-+ if (err)
-+ return err;
-+ prop->len = cpu_to_fdt32(newlen);
-+ memcpy(prop->data + oldlen, val, len);
-+ } else {
-+ err = fdt_add_property_(fdt, nodeoffset, name, len, &prop);
-+ if (err)
-+ return err;
-+ memcpy(prop->data, val, len);
-+ }
-+ return 0;
-+}
-+
-+int fdt_delprop(void *fdt, int nodeoffset, const char *name)
-+{
-+ struct fdt_property *prop;
-+ int len, proplen;
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
-+ if (!prop)
-+ return len;
-+
-+ proplen = sizeof(*prop) + FDT_TAGALIGN(len);
-+ return fdt_splice_struct_(fdt, prop, proplen, 0);
-+}
-+
-+int fdt_add_subnode_namelen(void *fdt, int parentoffset,
-+ const char *name, int namelen)
-+{
-+ struct fdt_node_header *nh;
-+ int offset, nextoffset;
-+ int nodelen;
-+ int err;
-+ uint32_t tag;
-+ fdt32_t *endtag;
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ offset = fdt_subnode_offset_namelen(fdt, parentoffset, name, namelen);
-+ if (offset >= 0)
-+ return -FDT_ERR_EXISTS;
-+ else if (offset != -FDT_ERR_NOTFOUND)
-+ return offset;
-+
-+ /* Try to place the new node after the parent's properties */
-+ tag = fdt_next_tag(fdt, parentoffset, &nextoffset);
-+ /* the fdt_subnode_offset_namelen() should ensure this never hits */
-+ if (!can_assume(LIBFDT_FLAWLESS) && (tag != FDT_BEGIN_NODE))
-+ return -FDT_ERR_INTERNAL;
-+ do {
-+ offset = nextoffset;
-+ tag = fdt_next_tag(fdt, offset, &nextoffset);
-+ } while ((tag == FDT_PROP) || (tag == FDT_NOP));
-+
-+ nh = fdt_offset_ptr_w_(fdt, offset);
-+ nodelen = sizeof(*nh) + FDT_TAGALIGN(namelen+1) + FDT_TAGSIZE;
-+
-+ err = fdt_splice_struct_(fdt, nh, 0, nodelen);
-+ if (err)
-+ return err;
-+
-+ nh->tag = cpu_to_fdt32(FDT_BEGIN_NODE);
-+ memset(nh->name, 0, FDT_TAGALIGN(namelen+1));
-+ memcpy(nh->name, name, namelen);
-+ endtag = (fdt32_t *)((char *)nh + nodelen - FDT_TAGSIZE);
-+ *endtag = cpu_to_fdt32(FDT_END_NODE);
-+
-+ return offset;
-+}
-+
-+int fdt_add_subnode(void *fdt, int parentoffset, const char *name)
-+{
-+ return fdt_add_subnode_namelen(fdt, parentoffset, name, strlen(name));
-+}
-+
-+int fdt_del_node(void *fdt, int nodeoffset)
-+{
-+ int endoffset;
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ endoffset = fdt_node_end_offset_(fdt, nodeoffset);
-+ if (endoffset < 0)
-+ return endoffset;
-+
-+ return fdt_splice_struct_(fdt, fdt_offset_ptr_w_(fdt, nodeoffset),
-+ endoffset - nodeoffset, 0);
-+}
-+
-+static void fdt_packblocks_(const char *old, char *new,
-+ int mem_rsv_size,
-+ int struct_size,
-+ int strings_size)
-+{
-+ int mem_rsv_off, struct_off, strings_off;
-+
-+ mem_rsv_off = FDT_ALIGN(sizeof(struct fdt_header), 8);
-+ struct_off = mem_rsv_off + mem_rsv_size;
-+ strings_off = struct_off + struct_size;
-+
-+ memmove(new + mem_rsv_off, old + fdt_off_mem_rsvmap(old), mem_rsv_size);
-+ fdt_set_off_mem_rsvmap(new, mem_rsv_off);
-+
-+ memmove(new + struct_off, old + fdt_off_dt_struct(old), struct_size);
-+ fdt_set_off_dt_struct(new, struct_off);
-+ fdt_set_size_dt_struct(new, struct_size);
-+
-+ memmove(new + strings_off, old + fdt_off_dt_strings(old), strings_size);
-+ fdt_set_off_dt_strings(new, strings_off);
-+ fdt_set_size_dt_strings(new, fdt_size_dt_strings(old));
-+}
-+
-+int fdt_open_into(const void *fdt, void *buf, int bufsize)
-+{
-+ int err;
-+ int mem_rsv_size, struct_size;
-+ int newsize;
-+ const char *fdtstart = fdt;
-+ const char *fdtend = fdtstart + fdt_totalsize(fdt);
-+ char *tmp;
-+
-+ FDT_RO_PROBE(fdt);
-+
-+ mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
-+ * sizeof(struct fdt_reserve_entry);
-+
-+ if (can_assume(LATEST) || fdt_version(fdt) >= 17) {
-+ struct_size = fdt_size_dt_struct(fdt);
-+ } else if (fdt_version(fdt) == 16) {
-+ struct_size = 0;
-+ while (fdt_next_tag(fdt, struct_size, &struct_size) != FDT_END)
-+ ;
-+ if (struct_size < 0)
-+ return struct_size;
-+ } else {
-+ return -FDT_ERR_BADVERSION;
-+ }
-+
-+ if (can_assume(LIBFDT_ORDER) ||
-+ !fdt_blocks_misordered_(fdt, mem_rsv_size, struct_size)) {
-+ /* no further work necessary */
-+ err = fdt_move(fdt, buf, bufsize);
-+ if (err)
-+ return err;
-+ fdt_set_version(buf, 17);
-+ fdt_set_size_dt_struct(buf, struct_size);
-+ fdt_set_totalsize(buf, bufsize);
-+ return 0;
-+ }
-+
-+ /* Need to reorder */
-+ newsize = FDT_ALIGN(sizeof(struct fdt_header), 8) + mem_rsv_size
-+ + struct_size + fdt_size_dt_strings(fdt);
-+
-+ if (bufsize < newsize)
-+ return -FDT_ERR_NOSPACE;
-+
-+ /* First attempt to build converted tree at beginning of buffer */
-+ tmp = buf;
-+ /* But if that overlaps with the old tree... */
-+ if (((tmp + newsize) > fdtstart) && (tmp < fdtend)) {
-+ /* Try right after the old tree instead */
-+ tmp = (char *)(uintptr_t)fdtend;
-+ if ((tmp + newsize) > ((char *)buf + bufsize))
-+ return -FDT_ERR_NOSPACE;
-+ }
-+
-+ fdt_packblocks_(fdt, tmp, mem_rsv_size, struct_size,
-+ fdt_size_dt_strings(fdt));
-+ memmove(buf, tmp, newsize);
-+
-+ fdt_set_magic(buf, FDT_MAGIC);
-+ fdt_set_totalsize(buf, bufsize);
-+ fdt_set_version(buf, 17);
-+ fdt_set_last_comp_version(buf, 16);
-+ fdt_set_boot_cpuid_phys(buf, fdt_boot_cpuid_phys(fdt));
-+
-+ return 0;
-+}
-+
-+int fdt_pack(void *fdt)
-+{
-+ int mem_rsv_size;
-+
-+ FDT_RW_PROBE(fdt);
-+
-+ mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
-+ * sizeof(struct fdt_reserve_entry);
-+ fdt_packblocks_(fdt, fdt, mem_rsv_size, fdt_size_dt_struct(fdt),
-+ fdt_size_dt_strings(fdt));
-+ fdt_set_totalsize(fdt, fdt_data_size_(fdt));
-+
-+ return 0;
-+}
-diff --git a/common/libfdt/fdt_strerror.c b/common/libfdt/fdt_strerror.c
-new file mode 100644
-index 0000000..b435693
---- /dev/null
-+++ b/common/libfdt/fdt_strerror.c
-@@ -0,0 +1,59 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+struct fdt_errtabent {
-+ const char *str;
-+};
-+
-+#define FDT_ERRTABENT(val) \
-+ [(val)] = { .str = #val, }
-+
-+static struct fdt_errtabent fdt_errtable[] = {
-+ FDT_ERRTABENT(FDT_ERR_NOTFOUND),
-+ FDT_ERRTABENT(FDT_ERR_EXISTS),
-+ FDT_ERRTABENT(FDT_ERR_NOSPACE),
-+
-+ FDT_ERRTABENT(FDT_ERR_BADOFFSET),
-+ FDT_ERRTABENT(FDT_ERR_BADPATH),
-+ FDT_ERRTABENT(FDT_ERR_BADPHANDLE),
-+ FDT_ERRTABENT(FDT_ERR_BADSTATE),
-+
-+ FDT_ERRTABENT(FDT_ERR_TRUNCATED),
-+ FDT_ERRTABENT(FDT_ERR_BADMAGIC),
-+ FDT_ERRTABENT(FDT_ERR_BADVERSION),
-+ FDT_ERRTABENT(FDT_ERR_BADSTRUCTURE),
-+ FDT_ERRTABENT(FDT_ERR_BADLAYOUT),
-+ FDT_ERRTABENT(FDT_ERR_INTERNAL),
-+ FDT_ERRTABENT(FDT_ERR_BADNCELLS),
-+ FDT_ERRTABENT(FDT_ERR_BADVALUE),
-+ FDT_ERRTABENT(FDT_ERR_BADOVERLAY),
-+ FDT_ERRTABENT(FDT_ERR_NOPHANDLES),
-+ FDT_ERRTABENT(FDT_ERR_BADFLAGS),
-+};
-+#define FDT_ERRTABSIZE ((int)(sizeof(fdt_errtable) / sizeof(fdt_errtable[0])))
-+
-+const char *fdt_strerror(int errval)
-+{
-+ if (errval > 0)
-+ return "<valid offset/length>";
-+ else if (errval == 0)
-+ return "<no error>";
-+ else if (-errval < FDT_ERRTABSIZE) {
-+ const char *s = fdt_errtable[-errval].str;
-+
-+ if (s)
-+ return s;
-+ }
-+
-+ return "<unknown error>";
-+}
-diff --git a/common/libfdt/fdt_sw.c b/common/libfdt/fdt_sw.c
-new file mode 100644
-index 0000000..4c569ee
---- /dev/null
-+++ b/common/libfdt/fdt_sw.c
-@@ -0,0 +1,384 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+static int fdt_sw_probe_(void *fdt)
-+{
-+ if (!can_assume(VALID_INPUT)) {
-+ if (fdt_magic(fdt) == FDT_MAGIC)
-+ return -FDT_ERR_BADSTATE;
-+ else if (fdt_magic(fdt) != FDT_SW_MAGIC)
-+ return -FDT_ERR_BADMAGIC;
-+ }
-+
-+ return 0;
-+}
-+
-+#define FDT_SW_PROBE(fdt) \
-+ { \
-+ int err; \
-+ if ((err = fdt_sw_probe_(fdt)) != 0) \
-+ return err; \
-+ }
-+
-+/* 'memrsv' state: Initial state after fdt_create()
-+ *
-+ * Allowed functions:
-+ * fdt_add_reservemap_entry()
-+ * fdt_finish_reservemap() [moves to 'struct' state]
-+ */
-+static int fdt_sw_probe_memrsv_(void *fdt)
-+{
-+ int err = fdt_sw_probe_(fdt);
-+ if (err)
-+ return err;
-+
-+ if (!can_assume(VALID_INPUT) && fdt_off_dt_strings(fdt) != 0)
-+ return -FDT_ERR_BADSTATE;
-+ return 0;
-+}
-+
-+#define FDT_SW_PROBE_MEMRSV(fdt) \
-+ { \
-+ int err; \
-+ if ((err = fdt_sw_probe_memrsv_(fdt)) != 0) \
-+ return err; \
-+ }
-+
-+/* 'struct' state: Enter this state after fdt_finish_reservemap()
-+ *
-+ * Allowed functions:
-+ * fdt_begin_node()
-+ * fdt_end_node()
-+ * fdt_property*()
-+ * fdt_finish() [moves to 'complete' state]
-+ */
-+static int fdt_sw_probe_struct_(void *fdt)
-+{
-+ int err = fdt_sw_probe_(fdt);
-+ if (err)
-+ return err;
-+
-+ if (!can_assume(VALID_INPUT) &&
-+ fdt_off_dt_strings(fdt) != fdt_totalsize(fdt))
-+ return -FDT_ERR_BADSTATE;
-+ return 0;
-+}
-+
-+#define FDT_SW_PROBE_STRUCT(fdt) \
-+ { \
-+ int err; \
-+ if ((err = fdt_sw_probe_struct_(fdt)) != 0) \
-+ return err; \
-+ }
-+
-+static inline uint32_t sw_flags(void *fdt)
-+{
-+ /* assert: (fdt_magic(fdt) == FDT_SW_MAGIC) */
-+ return fdt_last_comp_version(fdt);
-+}
-+
-+/* 'complete' state: Enter this state after fdt_finish()
-+ *
-+ * Allowed functions: none
-+ */
-+
-+static void *fdt_grab_space_(void *fdt, size_t len)
-+{
-+ unsigned int offset = fdt_size_dt_struct(fdt);
-+ unsigned int spaceleft;
-+
-+ spaceleft = fdt_totalsize(fdt) - fdt_off_dt_struct(fdt)
-+ - fdt_size_dt_strings(fdt);
-+
-+ if ((offset + len < offset) || (offset + len > spaceleft))
-+ return NULL;
-+
-+ fdt_set_size_dt_struct(fdt, offset + len);
-+ return fdt_offset_ptr_w_(fdt, offset);
-+}
-+
-+int fdt_create_with_flags(void *buf, int bufsize, uint32_t flags)
-+{
-+ const int hdrsize = FDT_ALIGN(sizeof(struct fdt_header),
-+ sizeof(struct fdt_reserve_entry));
-+ void *fdt = buf;
-+
-+ if (bufsize < hdrsize)
-+ return -FDT_ERR_NOSPACE;
-+
-+ if (flags & ~FDT_CREATE_FLAGS_ALL)
-+ return -FDT_ERR_BADFLAGS;
-+
-+ memset(buf, 0, bufsize);
-+
-+ /*
-+ * magic and last_comp_version keep intermediate state during the fdt
-+ * creation process, which is replaced with the proper FDT format by
-+ * fdt_finish().
-+ *
-+ * flags should be accessed with sw_flags().
-+ */
-+ fdt_set_magic(fdt, FDT_SW_MAGIC);
-+ fdt_set_version(fdt, FDT_LAST_SUPPORTED_VERSION);
-+ fdt_set_last_comp_version(fdt, flags);
-+
-+ fdt_set_totalsize(fdt, bufsize);
-+
-+ fdt_set_off_mem_rsvmap(fdt, hdrsize);
-+ fdt_set_off_dt_struct(fdt, fdt_off_mem_rsvmap(fdt));
-+ fdt_set_off_dt_strings(fdt, 0);
-+
-+ return 0;
-+}
-+
-+int fdt_create(void *buf, int bufsize)
-+{
-+ return fdt_create_with_flags(buf, bufsize, 0);
-+}
-+
-+int fdt_resize(void *fdt, void *buf, int bufsize)
-+{
-+ size_t headsize, tailsize;
-+ char *oldtail, *newtail;
-+
-+ FDT_SW_PROBE(fdt);
-+
-+ if (bufsize < 0)
-+ return -FDT_ERR_NOSPACE;
-+
-+ headsize = fdt_off_dt_struct(fdt) + fdt_size_dt_struct(fdt);
-+ tailsize = fdt_size_dt_strings(fdt);
-+
-+ if (!can_assume(VALID_DTB) &&
-+ headsize + tailsize > fdt_totalsize(fdt))
-+ return -FDT_ERR_INTERNAL;
-+
-+ if ((headsize + tailsize) > (unsigned)bufsize)
-+ return -FDT_ERR_NOSPACE;
-+
-+ oldtail = (char *)fdt + fdt_totalsize(fdt) - tailsize;
-+ newtail = (char *)buf + bufsize - tailsize;
-+
-+ /* Two cases to avoid clobbering data if the old and new
-+ * buffers partially overlap */
-+ if (buf <= fdt) {
-+ memmove(buf, fdt, headsize);
-+ memmove(newtail, oldtail, tailsize);
-+ } else {
-+ memmove(newtail, oldtail, tailsize);
-+ memmove(buf, fdt, headsize);
-+ }
-+
-+ fdt_set_totalsize(buf, bufsize);
-+ if (fdt_off_dt_strings(buf))
-+ fdt_set_off_dt_strings(buf, bufsize);
-+
-+ return 0;
-+}
-+
-+int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size)
-+{
-+ struct fdt_reserve_entry *re;
-+ int offset;
-+
-+ FDT_SW_PROBE_MEMRSV(fdt);
-+
-+ offset = fdt_off_dt_struct(fdt);
-+ if ((offset + sizeof(*re)) > fdt_totalsize(fdt))
-+ return -FDT_ERR_NOSPACE;
-+
-+ re = (struct fdt_reserve_entry *)((char *)fdt + offset);
-+ re->address = cpu_to_fdt64(addr);
-+ re->size = cpu_to_fdt64(size);
-+
-+ fdt_set_off_dt_struct(fdt, offset + sizeof(*re));
-+
-+ return 0;
-+}
-+
-+int fdt_finish_reservemap(void *fdt)
-+{
-+ int err = fdt_add_reservemap_entry(fdt, 0, 0);
-+
-+ if (err)
-+ return err;
-+
-+ fdt_set_off_dt_strings(fdt, fdt_totalsize(fdt));
-+ return 0;
-+}
-+
-+int fdt_begin_node(void *fdt, const char *name)
-+{
-+ struct fdt_node_header *nh;
-+ int namelen;
-+
-+ FDT_SW_PROBE_STRUCT(fdt);
-+
-+ namelen = strlen(name) + 1;
-+ nh = fdt_grab_space_(fdt, sizeof(*nh) + FDT_TAGALIGN(namelen));
-+ if (! nh)
-+ return -FDT_ERR_NOSPACE;
-+
-+ nh->tag = cpu_to_fdt32(FDT_BEGIN_NODE);
-+ memcpy(nh->name, name, namelen);
-+ return 0;
-+}
-+
-+int fdt_end_node(void *fdt)
-+{
-+ fdt32_t *en;
-+
-+ FDT_SW_PROBE_STRUCT(fdt);
-+
-+ en = fdt_grab_space_(fdt, FDT_TAGSIZE);
-+ if (! en)
-+ return -FDT_ERR_NOSPACE;
-+
-+ *en = cpu_to_fdt32(FDT_END_NODE);
-+ return 0;
-+}
-+
-+static int fdt_add_string_(void *fdt, const char *s)
-+{
-+ char *strtab = (char *)fdt + fdt_totalsize(fdt);
-+ unsigned int strtabsize = fdt_size_dt_strings(fdt);
-+ unsigned int len = strlen(s) + 1;
-+ unsigned int struct_top, offset;
-+
-+ offset = strtabsize + len;
-+ struct_top = fdt_off_dt_struct(fdt) + fdt_size_dt_struct(fdt);
-+ if (fdt_totalsize(fdt) - offset < struct_top)
-+ return 0; /* no more room :( */
-+
-+ memcpy(strtab - offset, s, len);
-+ fdt_set_size_dt_strings(fdt, strtabsize + len);
-+ return -offset;
-+}
-+
-+/* Must only be used to roll back in case of error */
-+static void fdt_del_last_string_(void *fdt, const char *s)
-+{
-+ int strtabsize = fdt_size_dt_strings(fdt);
-+ int len = strlen(s) + 1;
-+
-+ fdt_set_size_dt_strings(fdt, strtabsize - len);
-+}
-+
-+static int fdt_find_add_string_(void *fdt, const char *s, int *allocated)
-+{
-+ char *strtab = (char *)fdt + fdt_totalsize(fdt);
-+ int strtabsize = fdt_size_dt_strings(fdt);
-+ const char *p;
-+
-+ *allocated = 0;
-+
-+ p = fdt_find_string_(strtab - strtabsize, strtabsize, s);
-+ if (p)
-+ return p - strtab;
-+
-+ *allocated = 1;
-+
-+ return fdt_add_string_(fdt, s);
-+}
-+
-+int fdt_property_placeholder(void *fdt, const char *name, int len, void **valp)
-+{
-+ struct fdt_property *prop;
-+ int nameoff;
-+ int allocated;
-+
-+ FDT_SW_PROBE_STRUCT(fdt);
-+
-+ /* String de-duplication can be slow, _NO_NAME_DEDUP skips it */
-+ if (sw_flags(fdt) & FDT_CREATE_FLAG_NO_NAME_DEDUP) {
-+ allocated = 1;
-+ nameoff = fdt_add_string_(fdt, name);
-+ } else {
-+ nameoff = fdt_find_add_string_(fdt, name, &allocated);
-+ }
-+ if (nameoff == 0)
-+ return -FDT_ERR_NOSPACE;
-+
-+ prop = fdt_grab_space_(fdt, sizeof(*prop) + FDT_TAGALIGN(len));
-+ if (! prop) {
-+ if (allocated)
-+ fdt_del_last_string_(fdt, name);
-+ return -FDT_ERR_NOSPACE;
-+ }
-+
-+ prop->tag = cpu_to_fdt32(FDT_PROP);
-+ prop->nameoff = cpu_to_fdt32(nameoff);
-+ prop->len = cpu_to_fdt32(len);
-+ *valp = prop->data;
-+ return 0;
-+}
-+
-+int fdt_property(void *fdt, const char *name, const void *val, int len)
-+{
-+ void *ptr;
-+ int ret;
-+
-+ ret = fdt_property_placeholder(fdt, name, len, &ptr);
-+ if (ret)
-+ return ret;
-+ memcpy(ptr, val, len);
-+ return 0;
-+}
-+
-+int fdt_finish(void *fdt)
-+{
-+ char *p = (char *)fdt;
-+ fdt32_t *end;
-+ int oldstroffset, newstroffset;
-+ uint32_t tag;
-+ int offset, nextoffset;
-+
-+ FDT_SW_PROBE_STRUCT(fdt);
-+
-+ /* Add terminator */
-+ end = fdt_grab_space_(fdt, sizeof(*end));
-+ if (! end)
-+ return -FDT_ERR_NOSPACE;
-+ *end = cpu_to_fdt32(FDT_END);
-+
-+ /* Relocate the string table */
-+ oldstroffset = fdt_totalsize(fdt) - fdt_size_dt_strings(fdt);
-+ newstroffset = fdt_off_dt_struct(fdt) + fdt_size_dt_struct(fdt);
-+ memmove(p + newstroffset, p + oldstroffset, fdt_size_dt_strings(fdt));
-+ fdt_set_off_dt_strings(fdt, newstroffset);
-+
-+ /* Walk the structure, correcting string offsets */
-+ offset = 0;
-+ while ((tag = fdt_next_tag(fdt, offset, &nextoffset)) != FDT_END) {
-+ if (tag == FDT_PROP) {
-+ struct fdt_property *prop =
-+ fdt_offset_ptr_w_(fdt, offset);
-+ int nameoff;
-+
-+ nameoff = fdt32_to_cpu(prop->nameoff);
-+ nameoff += fdt_size_dt_strings(fdt);
-+ prop->nameoff = cpu_to_fdt32(nameoff);
-+ }
-+ offset = nextoffset;
-+ }
-+ if (nextoffset < 0)
-+ return nextoffset;
-+
-+ /* Finally, adjust the header */
-+ fdt_set_totalsize(fdt, newstroffset + fdt_size_dt_strings(fdt));
-+
-+ /* And fix up fields that were keeping intermediate state. */
-+ fdt_set_last_comp_version(fdt, FDT_LAST_COMPATIBLE_VERSION);
-+ fdt_set_magic(fdt, FDT_MAGIC);
-+
-+ return 0;
-+}
-diff --git a/common/libfdt/fdt_wip.c b/common/libfdt/fdt_wip.c
-new file mode 100644
-index 0000000..c2d7566
---- /dev/null
-+++ b/common/libfdt/fdt_wip.c
-@@ -0,0 +1,94 @@
-+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ */
-+#include "libfdt_env.h"
-+
-+#include <fdt.h>
-+#include <libfdt.h>
-+
-+#include "libfdt_internal.h"
-+
-+int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
-+ const char *name, int namelen,
-+ uint32_t idx, const void *val,
-+ int len)
-+{
-+ void *propval;
-+ int proplen;
-+
-+ propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen,
-+ &proplen);
-+ if (!propval)
-+ return proplen;
-+
-+ if ((unsigned)proplen < (len + idx))
-+ return -FDT_ERR_NOSPACE;
-+
-+ memcpy((char *)propval + idx, val, len);
-+ return 0;
-+}
-+
-+int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
-+ const void *val, int len)
-+{
-+ const void *propval;
-+ int proplen;
-+
-+ propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
-+ if (!propval)
-+ return proplen;
-+
-+ if (proplen != len)
-+ return -FDT_ERR_NOSPACE;
-+
-+ return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name,
-+ strlen(name), 0,
-+ val, len);
-+}
-+
-+static void fdt_nop_region_(void *start, int len)
-+{
-+ fdt32_t *p;
-+
-+ for (p = start; (char *)p < ((char *)start + len); p++)
-+ *p = cpu_to_fdt32(FDT_NOP);
-+}
-+
-+int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
-+{
-+ struct fdt_property *prop;
-+ int len;
-+
-+ prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
-+ if (!prop)
-+ return len;
-+
-+ fdt_nop_region_(prop, len + sizeof(*prop));
-+
-+ return 0;
-+}
-+
-+int fdt_node_end_offset_(void *fdt, int offset)
-+{
-+ int depth = 0;
-+
-+ while ((offset >= 0) && (depth >= 0))
-+ offset = fdt_next_node(fdt, offset, &depth);
-+
-+ return offset;
-+}
-+
-+int fdt_nop_node(void *fdt, int nodeoffset)
-+{
-+ int endoffset;
-+
-+ endoffset = fdt_node_end_offset_(fdt, nodeoffset);
-+ if (endoffset < 0)
-+ return endoffset;
-+
-+ fdt_nop_region_(fdt_offset_ptr_w(fdt, nodeoffset, 0),
-+ endoffset - nodeoffset);
-+ return 0;
-+}
-diff --git a/common/libfdt/libfdt_internal.h b/common/libfdt/libfdt_internal.h
-new file mode 100644
-index 0000000..16bda19
---- /dev/null
-+++ b/common/libfdt/libfdt_internal.h
-@@ -0,0 +1,192 @@
-+/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
-+#ifndef LIBFDT_INTERNAL_H
-+#define LIBFDT_INTERNAL_H
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ */
-+#include <fdt.h>
-+
-+#define FDT_ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
-+#define FDT_TAGALIGN(x) (FDT_ALIGN((x), FDT_TAGSIZE))
-+
-+int32_t fdt_ro_probe_(const void *fdt);
-+#define FDT_RO_PROBE(fdt) \
-+ { \
-+ int32_t totalsize_; \
-+ if ((totalsize_ = fdt_ro_probe_(fdt)) < 0) \
-+ return totalsize_; \
-+ }
-+
-+int fdt_check_node_offset_(const void *fdt, int offset);
-+int fdt_check_prop_offset_(const void *fdt, int offset);
-+const char *fdt_find_string_(const char *strtab, int tabsize, const char *s);
-+int fdt_node_end_offset_(void *fdt, int nodeoffset);
-+
-+static inline const void *fdt_offset_ptr_(const void *fdt, int offset)
-+{
-+ return (const char *)fdt + fdt_off_dt_struct(fdt) + offset;
-+}
-+
-+static inline void *fdt_offset_ptr_w_(void *fdt, int offset)
-+{
-+ return (void *)(uintptr_t)fdt_offset_ptr_(fdt, offset);
-+}
-+
-+static inline const struct fdt_reserve_entry *fdt_mem_rsv_(const void *fdt, int n)
-+{
-+ const struct fdt_reserve_entry *rsv_table =
-+ (const struct fdt_reserve_entry *)
-+ ((const char *)fdt + fdt_off_mem_rsvmap(fdt));
-+
-+ return rsv_table + n;
-+}
-+static inline struct fdt_reserve_entry *fdt_mem_rsv_w_(void *fdt, int n)
-+{
-+ return (void *)(uintptr_t)fdt_mem_rsv_(fdt, n);
-+}
-+
-+/*
-+ * Internal helpers to access tructural elements of the device tree
-+ * blob (rather than for exaple reading integers from within property
-+ * values). We assume that we are either given a naturally aligned
-+ * address for the platform or if we are not, we are on a platform
-+ * where unaligned memory reads will be handled in a graceful manner.
-+ * If not the external helpers fdtXX_ld() from libfdt.h can be used
-+ * instead.
-+ */
-+static inline uint32_t fdt32_ld_(const fdt32_t *p)
-+{
-+ return fdt32_to_cpu(*p);
-+}
-+
-+static inline uint64_t fdt64_ld_(const fdt64_t *p)
-+{
-+ return fdt64_to_cpu(*p);
-+}
-+
-+#define FDT_SW_MAGIC (~FDT_MAGIC)
-+
-+/**********************************************************************/
-+/* Checking controls */
-+/**********************************************************************/
-+
-+#ifndef FDT_ASSUME_MASK
-+#define FDT_ASSUME_MASK 0
-+#endif
-+
-+/*
-+ * Defines assumptions which can be enabled. Each of these can be enabled
-+ * individually. For maximum safety, don't enable any assumptions!
-+ *
-+ * For minimal code size and no safety, use ASSUME_PERFECT at your own risk.
-+ * You should have another method of validating the device tree, such as a
-+ * signature or hash check before using libfdt.
-+ *
-+ * For situations where security is not a concern it may be safe to enable
-+ * ASSUME_SANE.
-+ */
-+enum {
-+ /*
-+ * This does essentially no checks. Only the latest device-tree
-+ * version is correctly handled. Inconsistencies or errors in the device
-+ * tree may cause undefined behaviour or crashes. Invalid parameters
-+ * passed to libfdt may do the same.
-+ *
-+ * If an error occurs when modifying the tree it may leave the tree in
-+ * an intermediate (but valid) state. As an example, adding a property
-+ * where there is insufficient space may result in the property name
-+ * being added to the string table even though the property itself is
-+ * not added to the struct section.
-+ *
-+ * Only use this if you have a fully validated device tree with
-+ * the latest supported version and wish to minimise code size.
-+ */
-+ ASSUME_PERFECT = 0xff,
-+
-+ /*
-+ * This assumes that the device tree is sane. i.e. header metadata
-+ * and basic hierarchy are correct.
-+ *
-+ * With this assumption enabled, normal device trees produced by libfdt
-+ * and the compiler should be handled safely. Malicious device trees and
-+ * complete garbage may cause libfdt to behave badly or crash. Truncated
-+ * device trees (e.g. those only partially loaded) can also cause
-+ * problems.
-+ *
-+ * Note: Only checks that relate exclusively to the device tree itself
-+ * (not the parameters passed to libfdt) are disabled by this
-+ * assumption. This includes checking headers, tags and the like.
-+ */
-+ ASSUME_VALID_DTB = 1 << 0,
-+
-+ /*
-+ * This builds on ASSUME_VALID_DTB and further assumes that libfdt
-+ * functions are called with valid parameters, i.e. not trigger
-+ * FDT_ERR_BADOFFSET or offsets that are out of bounds. It disables any
-+ * extensive checking of parameters and the device tree, making various
-+ * assumptions about correctness.
-+ *
-+ * It doesn't make sense to enable this assumption unless
-+ * ASSUME_VALID_DTB is also enabled.
-+ */
-+ ASSUME_VALID_INPUT = 1 << 1,
-+
-+ /*
-+ * This disables checks for device-tree version and removes all code
-+ * which handles older versions.
-+ *
-+ * Only enable this if you know you have a device tree with the latest
-+ * version.
-+ */
-+ ASSUME_LATEST = 1 << 2,
-+
-+ /*
-+ * This assumes that it is OK for a failed addition to the device tree,
-+ * due to lack of space or some other problem, to skip any rollback
-+ * steps (such as dropping the property name from the string table).
-+ * This is safe to enable in most circumstances, even though it may
-+ * leave the tree in a sub-optimal state.
-+ */
-+ ASSUME_NO_ROLLBACK = 1 << 3,
-+
-+ /*
-+ * This assumes that the device tree components appear in a 'convenient'
-+ * order, i.e. the memory reservation block first, then the structure
-+ * block and finally the string block.
-+ *
-+ * This order is not specified by the device-tree specification,
-+ * but is expected by libfdt. The device-tree compiler always created
-+ * device trees with this order.
-+ *
-+ * This assumption disables a check in fdt_open_into() and removes the
-+ * ability to fix the problem there. This is safe if you know that the
-+ * device tree is correctly ordered. See fdt_blocks_misordered_().
-+ */
-+ ASSUME_LIBFDT_ORDER = 1 << 4,
-+
-+ /*
-+ * This assumes that libfdt itself does not have any internal bugs. It
-+ * drops certain checks that should never be needed unless libfdt has an
-+ * undiscovered bug.
-+ *
-+ * This can generally be considered safe to enable.
-+ */
-+ ASSUME_LIBFDT_FLAWLESS = 1 << 5,
-+};
-+
-+/**
-+ * can_assume_() - check if a particular assumption is enabled
-+ *
-+ * @mask: Mask to check (ASSUME_...)
-+ * @return true if that assumption is enabled, else false
-+ */
-+static inline bool can_assume_(int mask)
-+{
-+ return FDT_ASSUME_MASK & mask;
-+}
-+
-+/** helper macros for checking assumptions */
-+#define can_assume(_assume) can_assume_(ASSUME_ ## _assume)
-+
-+#endif /* LIBFDT_INTERNAL_H */
-diff --git a/include/fdt.h b/include/fdt.h
-new file mode 100644
-index 0000000..f2e6880
---- /dev/null
-+++ b/include/fdt.h
-@@ -0,0 +1,66 @@
-+/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
-+#ifndef FDT_H
-+#define FDT_H
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ * Copyright 2012 Kim Phillips, Freescale Semiconductor.
-+ */
-+
-+#ifndef __ASSEMBLY__
-+
-+struct fdt_header {
-+ fdt32_t magic; /* magic word FDT_MAGIC */
-+ fdt32_t totalsize; /* total size of DT block */
-+ fdt32_t off_dt_struct; /* offset to structure */
-+ fdt32_t off_dt_strings; /* offset to strings */
-+ fdt32_t off_mem_rsvmap; /* offset to memory reserve map */
-+ fdt32_t version; /* format version */
-+ fdt32_t last_comp_version; /* last compatible version */
-+
-+ /* version 2 fields below */
-+ fdt32_t boot_cpuid_phys; /* Which physical CPU id we're
-+ booting on */
-+ /* version 3 fields below */
-+ fdt32_t size_dt_strings; /* size of the strings block */
-+
-+ /* version 17 fields below */
-+ fdt32_t size_dt_struct; /* size of the structure block */
-+};
-+
-+struct fdt_reserve_entry {
-+ fdt64_t address;
-+ fdt64_t size;
-+};
-+
-+struct fdt_node_header {
-+ fdt32_t tag;
-+ char name[0];
-+};
-+
-+struct fdt_property {
-+ fdt32_t tag;
-+ fdt32_t len;
-+ fdt32_t nameoff;
-+ char data[0];
-+};
-+
-+#endif /* !__ASSEMBLY */
-+
-+#define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */
-+#define FDT_TAGSIZE sizeof(fdt32_t)
-+
-+#define FDT_BEGIN_NODE 0x1 /* Start node: full name */
-+#define FDT_END_NODE 0x2 /* End node */
-+#define FDT_PROP 0x3 /* Property: name off,
-+ size, content */
-+#define FDT_NOP 0x4 /* nop */
-+#define FDT_END 0x9
-+
-+#define FDT_V1_SIZE (7*sizeof(fdt32_t))
-+#define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(fdt32_t))
-+#define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(fdt32_t))
-+#define FDT_V16_SIZE FDT_V3_SIZE
-+#define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(fdt32_t))
-+
-+#endif /* FDT_H */
-diff --git a/include/libfdt.h b/include/libfdt.h
-new file mode 100644
-index 0000000..a7f432c
---- /dev/null
-+++ b/include/libfdt.h
-@@ -0,0 +1,2147 @@
-+/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
-+#ifndef LIBFDT_H
-+#define LIBFDT_H
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ */
-+
-+#include <libfdt_env.h>
-+#include <fdt.h>
-+
-+#ifdef __cplusplus
-+extern "C" {
-+#endif
-+
-+#define FDT_FIRST_SUPPORTED_VERSION 0x02
-+#define FDT_LAST_COMPATIBLE_VERSION 0x10
-+#define FDT_LAST_SUPPORTED_VERSION 0x11
-+
-+/* Error codes: informative error codes */
-+#define FDT_ERR_NOTFOUND 1
-+ /* FDT_ERR_NOTFOUND: The requested node or property does not exist */
-+#define FDT_ERR_EXISTS 2
-+ /* FDT_ERR_EXISTS: Attempted to create a node or property which
-+ * already exists */
-+#define FDT_ERR_NOSPACE 3
-+ /* FDT_ERR_NOSPACE: Operation needed to expand the device
-+ * tree, but its buffer did not have sufficient space to
-+ * contain the expanded tree. Use fdt_open_into() to move the
-+ * device tree to a buffer with more space. */
-+
-+/* Error codes: codes for bad parameters */
-+#define FDT_ERR_BADOFFSET 4
-+ /* FDT_ERR_BADOFFSET: Function was passed a structure block
-+ * offset which is out-of-bounds, or which points to an
-+ * unsuitable part of the structure for the operation. */
-+#define FDT_ERR_BADPATH 5
-+ /* FDT_ERR_BADPATH: Function was passed a badly formatted path
-+ * (e.g. missing a leading / for a function which requires an
-+ * absolute path) */
-+#define FDT_ERR_BADPHANDLE 6
-+ /* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle.
-+ * This can be caused either by an invalid phandle property
-+ * length, or the phandle value was either 0 or -1, which are
-+ * not permitted. */
-+#define FDT_ERR_BADSTATE 7
-+ /* FDT_ERR_BADSTATE: Function was passed an incomplete device
-+ * tree created by the sequential-write functions, which is
-+ * not sufficiently complete for the requested operation. */
-+
-+/* Error codes: codes for bad device tree blobs */
-+#define FDT_ERR_TRUNCATED 8
-+ /* FDT_ERR_TRUNCATED: FDT or a sub-block is improperly
-+ * terminated (overflows, goes outside allowed bounds, or
-+ * isn't properly terminated). */
-+#define FDT_ERR_BADMAGIC 9
-+ /* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a
-+ * device tree at all - it is missing the flattened device
-+ * tree magic number. */
-+#define FDT_ERR_BADVERSION 10
-+ /* FDT_ERR_BADVERSION: Given device tree has a version which
-+ * can't be handled by the requested operation. For
-+ * read-write functions, this may mean that fdt_open_into() is
-+ * required to convert the tree to the expected version. */
-+#define FDT_ERR_BADSTRUCTURE 11
-+ /* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt
-+ * structure block or other serious error (e.g. misnested
-+ * nodes, or subnodes preceding properties). */
-+#define FDT_ERR_BADLAYOUT 12
-+ /* FDT_ERR_BADLAYOUT: For read-write functions, the given
-+ * device tree has it's sub-blocks in an order that the
-+ * function can't handle (memory reserve map, then structure,
-+ * then strings). Use fdt_open_into() to reorganize the tree
-+ * into a form suitable for the read-write operations. */
-+
-+/* "Can't happen" error indicating a bug in libfdt */
-+#define FDT_ERR_INTERNAL 13
-+ /* FDT_ERR_INTERNAL: libfdt has failed an internal assertion.
-+ * Should never be returned, if it is, it indicates a bug in
-+ * libfdt itself. */
-+
-+/* Errors in device tree content */
-+#define FDT_ERR_BADNCELLS 14
-+ /* FDT_ERR_BADNCELLS: Device tree has a #address-cells, #size-cells
-+ * or similar property with a bad format or value */
-+
-+#define FDT_ERR_BADVALUE 15
-+ /* FDT_ERR_BADVALUE: Device tree has a property with an unexpected
-+ * value. For example: a property expected to contain a string list
-+ * is not NUL-terminated within the length of its value. */
-+
-+#define FDT_ERR_BADOVERLAY 16
-+ /* FDT_ERR_BADOVERLAY: The device tree overlay, while
-+ * correctly structured, cannot be applied due to some
-+ * unexpected or missing value, property or node. */
-+
-+#define FDT_ERR_NOPHANDLES 17
-+ /* FDT_ERR_NOPHANDLES: The device tree doesn't have any
-+ * phandle available anymore without causing an overflow */
-+
-+#define FDT_ERR_BADFLAGS 18
-+ /* FDT_ERR_BADFLAGS: The function was passed a flags field that
-+ * contains invalid flags or an invalid combination of flags. */
-+
-+#define FDT_ERR_ALIGNMENT 19
-+ /* FDT_ERR_ALIGNMENT: The device tree base address is not 8-byte
-+ * aligned. */
-+
-+#define FDT_ERR_MAX 19
-+
-+/* constants */
-+#define FDT_MAX_PHANDLE 0xfffffffe
-+ /* Valid values for phandles range from 1 to 2^32-2. */
-+
-+/**********************************************************************/
-+/* Low-level functions (you probably don't need these) */
-+/**********************************************************************/
-+
-+#ifndef SWIG /* This function is not useful in Python */
-+const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
-+#endif
-+static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)
-+{
-+ return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);
-+}
-+
-+uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset);
-+
-+/*
-+ * External helpers to access words from a device tree blob. They're built
-+ * to work even with unaligned pointers on platforms (such as ARMv5) that don't
-+ * like unaligned loads and stores.
-+ */
-+static inline uint16_t fdt16_ld(const fdt16_t *p)
-+{
-+ const uint8_t *bp = (const uint8_t *)p;
-+
-+ return ((uint16_t)bp[0] << 8) | bp[1];
-+}
-+
-+static inline uint32_t fdt32_ld(const fdt32_t *p)
-+{
-+ const uint8_t *bp = (const uint8_t *)p;
-+
-+ return ((uint32_t)bp[0] << 24)
-+ | ((uint32_t)bp[1] << 16)
-+ | ((uint32_t)bp[2] << 8)
-+ | bp[3];
-+}
-+
-+static inline void fdt32_st(void *property, uint32_t value)
-+{
-+ uint8_t *bp = (uint8_t *)property;
-+
-+ bp[0] = value >> 24;
-+ bp[1] = (value >> 16) & 0xff;
-+ bp[2] = (value >> 8) & 0xff;
-+ bp[3] = value & 0xff;
-+}
-+
-+static inline uint64_t fdt64_ld(const fdt64_t *p)
-+{
-+ const uint8_t *bp = (const uint8_t *)p;
-+
-+ return ((uint64_t)bp[0] << 56)
-+ | ((uint64_t)bp[1] << 48)
-+ | ((uint64_t)bp[2] << 40)
-+ | ((uint64_t)bp[3] << 32)
-+ | ((uint64_t)bp[4] << 24)
-+ | ((uint64_t)bp[5] << 16)
-+ | ((uint64_t)bp[6] << 8)
-+ | bp[7];
-+}
-+
-+static inline void fdt64_st(void *property, uint64_t value)
-+{
-+ uint8_t *bp = (uint8_t *)property;
-+
-+ bp[0] = value >> 56;
-+ bp[1] = (value >> 48) & 0xff;
-+ bp[2] = (value >> 40) & 0xff;
-+ bp[3] = (value >> 32) & 0xff;
-+ bp[4] = (value >> 24) & 0xff;
-+ bp[5] = (value >> 16) & 0xff;
-+ bp[6] = (value >> 8) & 0xff;
-+ bp[7] = value & 0xff;
-+}
-+
-+/**********************************************************************/
-+/* Traversal functions */
-+/**********************************************************************/
-+
-+int fdt_next_node(const void *fdt, int offset, int *depth);
-+
-+/**
-+ * fdt_first_subnode() - get offset of first direct subnode
-+ * @fdt: FDT blob
-+ * @offset: Offset of node to check
-+ *
-+ * Return: offset of first subnode, or -FDT_ERR_NOTFOUND if there is none
-+ */
-+int fdt_first_subnode(const void *fdt, int offset);
-+
-+/**
-+ * fdt_next_subnode() - get offset of next direct subnode
-+ * @fdt: FDT blob
-+ * @offset: Offset of previous subnode
-+ *
-+ * After first calling fdt_first_subnode(), call this function repeatedly to
-+ * get direct subnodes of a parent node.
-+ *
-+ * Return: offset of next subnode, or -FDT_ERR_NOTFOUND if there are no more
-+ * subnodes
-+ */
-+int fdt_next_subnode(const void *fdt, int offset);
-+
-+/**
-+ * fdt_for_each_subnode - iterate over all subnodes of a parent
-+ *
-+ * @node: child node (int, lvalue)
-+ * @fdt: FDT blob (const void *)
-+ * @parent: parent node (int)
-+ *
-+ * This is actually a wrapper around a for loop and would be used like so:
-+ *
-+ * fdt_for_each_subnode(node, fdt, parent) {
-+ * Use node
-+ * ...
-+ * }
-+ *
-+ * if ((node < 0) && (node != -FDT_ERR_NOTFOUND)) {
-+ * Error handling
-+ * }
-+ *
-+ * Note that this is implemented as a macro and @node is used as
-+ * iterator in the loop. The parent variable be constant or even a
-+ * literal.
-+ */
-+#define fdt_for_each_subnode(node, fdt, parent) \
-+ for (node = fdt_first_subnode(fdt, parent); \
-+ node >= 0; \
-+ node = fdt_next_subnode(fdt, node))
-+
-+/**********************************************************************/
-+/* General functions */
-+/**********************************************************************/
-+#define fdt_get_header(fdt, field) \
-+ (fdt32_ld(&((const struct fdt_header *)(fdt))->field))
-+#define fdt_magic(fdt) (fdt_get_header(fdt, magic))
-+#define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize))
-+#define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct))
-+#define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings))
-+#define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap))
-+#define fdt_version(fdt) (fdt_get_header(fdt, version))
-+#define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version))
-+#define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys))
-+#define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings))
-+#define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct))
-+
-+#define fdt_set_hdr_(name) \
-+ static inline void fdt_set_##name(void *fdt, uint32_t val) \
-+ { \
-+ struct fdt_header *fdth = (struct fdt_header *)fdt; \
-+ fdth->name = cpu_to_fdt32(val); \
-+ }
-+fdt_set_hdr_(magic);
-+fdt_set_hdr_(totalsize);
-+fdt_set_hdr_(off_dt_struct);
-+fdt_set_hdr_(off_dt_strings);
-+fdt_set_hdr_(off_mem_rsvmap);
-+fdt_set_hdr_(version);
-+fdt_set_hdr_(last_comp_version);
-+fdt_set_hdr_(boot_cpuid_phys);
-+fdt_set_hdr_(size_dt_strings);
-+fdt_set_hdr_(size_dt_struct);
-+#undef fdt_set_hdr_
-+
-+/**
-+ * fdt_header_size - return the size of the tree's header
-+ * @fdt: pointer to a flattened device tree
-+ *
-+ * Return: size of DTB header in bytes
-+ */
-+size_t fdt_header_size(const void *fdt);
-+
-+/**
-+ * fdt_header_size_ - internal function to get header size from a version number
-+ * @version: devicetree version number
-+ *
-+ * Return: size of DTB header in bytes
-+ */
-+size_t fdt_header_size_(uint32_t version);
-+
-+/**
-+ * fdt_check_header - sanity check a device tree header
-+ * @fdt: pointer to data which might be a flattened device tree
-+ *
-+ * fdt_check_header() checks that the given buffer contains what
-+ * appears to be a flattened device tree, and that the header contains
-+ * valid information (to the extent that can be determined from the
-+ * header alone).
-+ *
-+ * returns:
-+ * 0, if the buffer appears to contain a valid device tree
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_TRUNCATED, standard meanings, as above
-+ */
-+int fdt_check_header(const void *fdt);
-+
-+/**
-+ * fdt_move - move a device tree around in memory
-+ * @fdt: pointer to the device tree to move
-+ * @buf: pointer to memory where the device is to be moved
-+ * @bufsize: size of the memory space at buf
-+ *
-+ * fdt_move() relocates, if possible, the device tree blob located at
-+ * fdt to the buffer at buf of size bufsize. The buffer may overlap
-+ * with the existing device tree blob at fdt. Therefore,
-+ * fdt_move(fdt, fdt, fdt_totalsize(fdt))
-+ * should always succeed.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE, standard meanings
-+ */
-+int fdt_move(const void *fdt, void *buf, int bufsize);
-+
-+/**********************************************************************/
-+/* Read-only functions */
-+/**********************************************************************/
-+
-+int fdt_check_full(const void *fdt, size_t bufsize);
-+
-+/**
-+ * fdt_get_string - retrieve a string from the strings block of a device tree
-+ * @fdt: pointer to the device tree blob
-+ * @stroffset: offset of the string within the strings block (native endian)
-+ * @lenp: optional pointer to return the string's length
-+ *
-+ * fdt_get_string() retrieves a pointer to a single string from the
-+ * strings block of the device tree blob at fdt, and optionally also
-+ * returns the string's length in *lenp.
-+ *
-+ * returns:
-+ * a pointer to the string, on success
-+ * NULL, if stroffset is out of bounds, or doesn't point to a valid string
-+ */
-+const char *fdt_get_string(const void *fdt, int stroffset, int *lenp);
-+
-+/**
-+ * fdt_string - retrieve a string from the strings block of a device tree
-+ * @fdt: pointer to the device tree blob
-+ * @stroffset: offset of the string within the strings block (native endian)
-+ *
-+ * fdt_string() retrieves a pointer to a single string from the
-+ * strings block of the device tree blob at fdt.
-+ *
-+ * returns:
-+ * a pointer to the string, on success
-+ * NULL, if stroffset is out of bounds, or doesn't point to a valid string
-+ */
-+const char *fdt_string(const void *fdt, int stroffset);
-+
-+/**
-+ * fdt_find_max_phandle - find and return the highest phandle in a tree
-+ * @fdt: pointer to the device tree blob
-+ * @phandle: return location for the highest phandle value found in the tree
-+ *
-+ * fdt_find_max_phandle() finds the highest phandle value in the given device
-+ * tree. The value returned in @phandle is only valid if the function returns
-+ * success.
-+ *
-+ * returns:
-+ * 0 on success or a negative error code on failure
-+ */
-+int fdt_find_max_phandle(const void *fdt, uint32_t *phandle);
-+
-+/**
-+ * fdt_get_max_phandle - retrieves the highest phandle in a tree
-+ * @fdt: pointer to the device tree blob
-+ *
-+ * fdt_get_max_phandle retrieves the highest phandle in the given
-+ * device tree. This will ignore badly formatted phandles, or phandles
-+ * with a value of 0 or -1.
-+ *
-+ * This function is deprecated in favour of fdt_find_max_phandle().
-+ *
-+ * returns:
-+ * the highest phandle on success
-+ * 0, if no phandle was found in the device tree
-+ * -1, if an error occurred
-+ */
-+static inline uint32_t fdt_get_max_phandle(const void *fdt)
-+{
-+ uint32_t phandle;
-+ int err;
-+
-+ err = fdt_find_max_phandle(fdt, &phandle);
-+ if (err < 0)
-+ return (uint32_t)-1;
-+
-+ return phandle;
-+}
-+
-+/**
-+ * fdt_generate_phandle - return a new, unused phandle for a device tree blob
-+ * @fdt: pointer to the device tree blob
-+ * @phandle: return location for the new phandle
-+ *
-+ * Walks the device tree blob and looks for the highest phandle value. On
-+ * success, the new, unused phandle value (one higher than the previously
-+ * highest phandle value in the device tree blob) will be returned in the
-+ * @phandle parameter.
-+ *
-+ * Return: 0 on success or a negative error-code on failure
-+ */
-+int fdt_generate_phandle(const void *fdt, uint32_t *phandle);
-+
-+/**
-+ * fdt_num_mem_rsv - retrieve the number of memory reserve map entries
-+ * @fdt: pointer to the device tree blob
-+ *
-+ * Returns the number of entries in the device tree blob's memory
-+ * reservation map. This does not include the terminating 0,0 entry
-+ * or any other (0,0) entries reserved for expansion.
-+ *
-+ * returns:
-+ * the number of entries
-+ */
-+int fdt_num_mem_rsv(const void *fdt);
-+
-+/**
-+ * fdt_get_mem_rsv - retrieve one memory reserve map entry
-+ * @fdt: pointer to the device tree blob
-+ * @n: index of reserve map entry
-+ * @address: pointer to 64-bit variable to hold the start address
-+ * @size: pointer to 64-bit variable to hold the size of the entry
-+ *
-+ * On success, @address and @size will contain the address and size of
-+ * the n-th reserve map entry from the device tree blob, in
-+ * native-endian format.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE, standard meanings
-+ */
-+int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size);
-+
-+/**
-+ * fdt_subnode_offset_namelen - find a subnode based on substring
-+ * @fdt: pointer to the device tree blob
-+ * @parentoffset: structure block offset of a node
-+ * @name: name of the subnode to locate
-+ * @namelen: number of characters of name to consider
-+ *
-+ * Identical to fdt_subnode_offset(), but only examine the first
-+ * namelen characters of name for matching the subnode name. This is
-+ * useful for finding subnodes based on a portion of a larger string,
-+ * such as a full path.
-+ *
-+ * Return: offset of the subnode or -FDT_ERR_NOTFOUND if name not found.
-+ */
-+#ifndef SWIG /* Not available in Python */
-+int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
-+ const char *name, int namelen);
-+#endif
-+/**
-+ * fdt_subnode_offset - find a subnode of a given node
-+ * @fdt: pointer to the device tree blob
-+ * @parentoffset: structure block offset of a node
-+ * @name: name of the subnode to locate
-+ *
-+ * fdt_subnode_offset() finds a subnode of the node at structure block
-+ * offset parentoffset with the given name. name may include a unit
-+ * address, in which case fdt_subnode_offset() will find the subnode
-+ * with that unit address, or the unit address may be omitted, in
-+ * which case fdt_subnode_offset() will find an arbitrary subnode
-+ * whose name excluding unit address matches the given name.
-+ *
-+ * returns:
-+ * structure block offset of the requested subnode (>=0), on success
-+ * -FDT_ERR_NOTFOUND, if the requested subnode does not exist
-+ * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE
-+ * tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings.
-+ */
-+int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);
-+
-+/**
-+ * fdt_path_offset_namelen - find a tree node by its full path
-+ * @fdt: pointer to the device tree blob
-+ * @path: full path of the node to locate
-+ * @namelen: number of characters of path to consider
-+ *
-+ * Identical to fdt_path_offset(), but only consider the first namelen
-+ * characters of path as the path name.
-+ *
-+ * Return: offset of the node or negative libfdt error value otherwise
-+ */
-+#ifndef SWIG /* Not available in Python */
-+int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen);
-+#endif
-+
-+/**
-+ * fdt_path_offset - find a tree node by its full path
-+ * @fdt: pointer to the device tree blob
-+ * @path: full path of the node to locate
-+ *
-+ * fdt_path_offset() finds a node of a given path in the device tree.
-+ * Each path component may omit the unit address portion, but the
-+ * results of this are undefined if any such path component is
-+ * ambiguous (that is if there are multiple nodes at the relevant
-+ * level matching the given component, differentiated only by unit
-+ * address).
-+ *
-+ * returns:
-+ * structure block offset of the node with the requested path (>=0), on
-+ * success
-+ * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid
-+ * -FDT_ERR_NOTFOUND, if the requested node does not exist
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings.
-+ */
-+int fdt_path_offset(const void *fdt, const char *path);
-+
-+/**
-+ * fdt_get_name - retrieve the name of a given node
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: structure block offset of the starting node
-+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
-+ *
-+ * fdt_get_name() retrieves the name (including unit address) of the
-+ * device tree node at structure block offset nodeoffset. If lenp is
-+ * non-NULL, the length of this name is also returned, in the integer
-+ * pointed to by lenp.
-+ *
-+ * returns:
-+ * pointer to the node's name, on success
-+ * If lenp is non-NULL, *lenp contains the length of that name
-+ * (>=0)
-+ * NULL, on error
-+ * if lenp is non-NULL *lenp contains an error code (<0):
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE
-+ * tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE, standard meanings
-+ */
-+const char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp);
-+
-+/**
-+ * fdt_first_property_offset - find the offset of a node's first property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: structure block offset of a node
-+ *
-+ * fdt_first_property_offset() finds the first property of the node at
-+ * the given structure block offset.
-+ *
-+ * returns:
-+ * structure block offset of the property (>=0), on success
-+ * -FDT_ERR_NOTFOUND, if the requested node has no properties
-+ * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings.
-+ */
-+int fdt_first_property_offset(const void *fdt, int nodeoffset);
-+
-+/**
-+ * fdt_next_property_offset - step through a node's properties
-+ * @fdt: pointer to the device tree blob
-+ * @offset: structure block offset of a property
-+ *
-+ * fdt_next_property_offset() finds the property immediately after the
-+ * one at the given structure block offset. This will be a property
-+ * of the same node as the given property.
-+ *
-+ * returns:
-+ * structure block offset of the next property (>=0), on success
-+ * -FDT_ERR_NOTFOUND, if the given property is the last in its node
-+ * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_PROP tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings.
-+ */
-+int fdt_next_property_offset(const void *fdt, int offset);
-+
-+/**
-+ * fdt_for_each_property_offset - iterate over all properties of a node
-+ *
-+ * @property: property offset (int, lvalue)
-+ * @fdt: FDT blob (const void *)
-+ * @node: node offset (int)
-+ *
-+ * This is actually a wrapper around a for loop and would be used like so:
-+ *
-+ * fdt_for_each_property_offset(property, fdt, node) {
-+ * Use property
-+ * ...
-+ * }
-+ *
-+ * if ((property < 0) && (property != -FDT_ERR_NOTFOUND)) {
-+ * Error handling
-+ * }
-+ *
-+ * Note that this is implemented as a macro and property is used as
-+ * iterator in the loop. The node variable can be constant or even a
-+ * literal.
-+ */
-+#define fdt_for_each_property_offset(property, fdt, node) \
-+ for (property = fdt_first_property_offset(fdt, node); \
-+ property >= 0; \
-+ property = fdt_next_property_offset(fdt, property))
-+
-+/**
-+ * fdt_get_property_by_offset - retrieve the property at a given offset
-+ * @fdt: pointer to the device tree blob
-+ * @offset: offset of the property to retrieve
-+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
-+ *
-+ * fdt_get_property_by_offset() retrieves a pointer to the
-+ * fdt_property structure within the device tree blob at the given
-+ * offset. If lenp is non-NULL, the length of the property value is
-+ * also returned, in the integer pointed to by lenp.
-+ *
-+ * Note that this code only works on device tree versions >= 16. fdt_getprop()
-+ * works on all versions.
-+ *
-+ * returns:
-+ * pointer to the structure representing the property
-+ * if lenp is non-NULL, *lenp contains the length of the property
-+ * value (>=0)
-+ * NULL, on error
-+ * if lenp is non-NULL, *lenp contains an error code (<0):
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
-+ int offset,
-+ int *lenp);
-+
-+/**
-+ * fdt_get_property_namelen - find a property based on substring
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to find
-+ * @name: name of the property to find
-+ * @namelen: number of characters of name to consider
-+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
-+ *
-+ * Identical to fdt_get_property(), but only examine the first namelen
-+ * characters of name for matching the property name.
-+ *
-+ * Return: pointer to the structure representing the property, or NULL
-+ * if not found
-+ */
-+#ifndef SWIG /* Not available in Python */
-+const struct fdt_property *fdt_get_property_namelen(const void *fdt,
-+ int nodeoffset,
-+ const char *name,
-+ int namelen, int *lenp);
-+#endif
-+
-+/**
-+ * fdt_get_property - find a given property in a given node
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to find
-+ * @name: name of the property to find
-+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
-+ *
-+ * fdt_get_property() retrieves a pointer to the fdt_property
-+ * structure within the device tree blob corresponding to the property
-+ * named 'name' of the node at offset nodeoffset. If lenp is
-+ * non-NULL, the length of the property value is also returned, in the
-+ * integer pointed to by lenp.
-+ *
-+ * returns:
-+ * pointer to the structure representing the property
-+ * if lenp is non-NULL, *lenp contains the length of the property
-+ * value (>=0)
-+ * NULL, on error
-+ * if lenp is non-NULL, *lenp contains an error code (<0):
-+ * -FDT_ERR_NOTFOUND, node does not have named property
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE
-+ * tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+const struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,
-+ const char *name, int *lenp);
-+static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset,
-+ const char *name,
-+ int *lenp)
-+{
-+ return (struct fdt_property *)(uintptr_t)
-+ fdt_get_property(fdt, nodeoffset, name, lenp);
-+}
-+
-+/**
-+ * fdt_getprop_by_offset - retrieve the value of a property at a given offset
-+ * @fdt: pointer to the device tree blob
-+ * @offset: offset of the property to read
-+ * @namep: pointer to a string variable (will be overwritten) or NULL
-+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
-+ *
-+ * fdt_getprop_by_offset() retrieves a pointer to the value of the
-+ * property at structure block offset 'offset' (this will be a pointer
-+ * to within the device blob itself, not a copy of the value). If
-+ * lenp is non-NULL, the length of the property value is also
-+ * returned, in the integer pointed to by lenp. If namep is non-NULL,
-+ * the property's namne will also be returned in the char * pointed to
-+ * by namep (this will be a pointer to within the device tree's string
-+ * block, not a new copy of the name).
-+ *
-+ * returns:
-+ * pointer to the property's value
-+ * if lenp is non-NULL, *lenp contains the length of the property
-+ * value (>=0)
-+ * if namep is non-NULL *namep contiains a pointer to the property
-+ * name.
-+ * NULL, on error
-+ * if lenp is non-NULL, *lenp contains an error code (<0):
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+#ifndef SWIG /* This function is not useful in Python */
-+const void *fdt_getprop_by_offset(const void *fdt, int offset,
-+ const char **namep, int *lenp);
-+#endif
-+
-+/**
-+ * fdt_getprop_namelen - get property value based on substring
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to find
-+ * @name: name of the property to find
-+ * @namelen: number of characters of name to consider
-+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
-+ *
-+ * Identical to fdt_getprop(), but only examine the first namelen
-+ * characters of name for matching the property name.
-+ *
-+ * Return: pointer to the property's value or NULL on error
-+ */
-+#ifndef SWIG /* Not available in Python */
-+const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
-+ const char *name, int namelen, int *lenp);
-+static inline void *fdt_getprop_namelen_w(void *fdt, int nodeoffset,
-+ const char *name, int namelen,
-+ int *lenp)
-+{
-+ return (void *)(uintptr_t)fdt_getprop_namelen(fdt, nodeoffset, name,
-+ namelen, lenp);
-+}
-+#endif
-+
-+/**
-+ * fdt_getprop - retrieve the value of a given property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to find
-+ * @name: name of the property to find
-+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
-+ *
-+ * fdt_getprop() retrieves a pointer to the value of the property
-+ * named @name of the node at offset @nodeoffset (this will be a
-+ * pointer to within the device blob itself, not a copy of the value).
-+ * If @lenp is non-NULL, the length of the property value is also
-+ * returned, in the integer pointed to by @lenp.
-+ *
-+ * returns:
-+ * pointer to the property's value
-+ * if lenp is non-NULL, *lenp contains the length of the property
-+ * value (>=0)
-+ * NULL, on error
-+ * if lenp is non-NULL, *lenp contains an error code (<0):
-+ * -FDT_ERR_NOTFOUND, node does not have named property
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE
-+ * tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+const void *fdt_getprop(const void *fdt, int nodeoffset,
-+ const char *name, int *lenp);
-+static inline void *fdt_getprop_w(void *fdt, int nodeoffset,
-+ const char *name, int *lenp)
-+{
-+ return (void *)(uintptr_t)fdt_getprop(fdt, nodeoffset, name, lenp);
-+}
-+
-+/**
-+ * fdt_get_phandle - retrieve the phandle of a given node
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: structure block offset of the node
-+ *
-+ * fdt_get_phandle() retrieves the phandle of the device tree node at
-+ * structure block offset nodeoffset.
-+ *
-+ * returns:
-+ * the phandle of the node at nodeoffset, on success (!= 0, != -1)
-+ * 0, if the node has no phandle, or another error occurs
-+ */
-+uint32_t fdt_get_phandle(const void *fdt, int nodeoffset);
-+
-+/**
-+ * fdt_get_alias_namelen - get alias based on substring
-+ * @fdt: pointer to the device tree blob
-+ * @name: name of the alias th look up
-+ * @namelen: number of characters of name to consider
-+ *
-+ * Identical to fdt_get_alias(), but only examine the first @namelen
-+ * characters of @name for matching the alias name.
-+ *
-+ * Return: a pointer to the expansion of the alias named @name, if it exists,
-+ * NULL otherwise
-+ */
-+#ifndef SWIG /* Not available in Python */
-+const char *fdt_get_alias_namelen(const void *fdt,
-+ const char *name, int namelen);
-+#endif
-+
-+/**
-+ * fdt_get_alias - retrieve the path referenced by a given alias
-+ * @fdt: pointer to the device tree blob
-+ * @name: name of the alias th look up
-+ *
-+ * fdt_get_alias() retrieves the value of a given alias. That is, the
-+ * value of the property named @name in the node /aliases.
-+ *
-+ * returns:
-+ * a pointer to the expansion of the alias named 'name', if it exists
-+ * NULL, if the given alias or the /aliases node does not exist
-+ */
-+const char *fdt_get_alias(const void *fdt, const char *name);
-+
-+/**
-+ * fdt_get_path - determine the full path of a node
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose path to find
-+ * @buf: character buffer to contain the returned path (will be overwritten)
-+ * @buflen: size of the character buffer at buf
-+ *
-+ * fdt_get_path() computes the full path of the node at offset
-+ * nodeoffset, and records that path in the buffer at buf.
-+ *
-+ * NOTE: This function is expensive, as it must scan the device tree
-+ * structure from the start to nodeoffset.
-+ *
-+ * returns:
-+ * 0, on success
-+ * buf contains the absolute path of the node at
-+ * nodeoffset, as a NUL-terminated string.
-+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
-+ * -FDT_ERR_NOSPACE, the path of the given node is longer than (bufsize-1)
-+ * characters and will not fit in the given buffer.
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE, standard meanings
-+ */
-+int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen);
-+
-+/**
-+ * fdt_supernode_atdepth_offset - find a specific ancestor of a node
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose parent to find
-+ * @supernodedepth: depth of the ancestor to find
-+ * @nodedepth: pointer to an integer variable (will be overwritten) or NULL
-+ *
-+ * fdt_supernode_atdepth_offset() finds an ancestor of the given node
-+ * at a specific depth from the root (where the root itself has depth
-+ * 0, its immediate subnodes depth 1 and so forth). So
-+ * fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, NULL);
-+ * will always return 0, the offset of the root node. If the node at
-+ * nodeoffset has depth D, then:
-+ * fdt_supernode_atdepth_offset(fdt, nodeoffset, D, NULL);
-+ * will return nodeoffset itself.
-+ *
-+ * NOTE: This function is expensive, as it must scan the device tree
-+ * structure from the start to nodeoffset.
-+ *
-+ * returns:
-+ * structure block offset of the node at node offset's ancestor
-+ * of depth supernodedepth (>=0), on success
-+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
-+ * -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of
-+ * nodeoffset
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE, standard meanings
-+ */
-+int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,
-+ int supernodedepth, int *nodedepth);
-+
-+/**
-+ * fdt_node_depth - find the depth of a given node
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose parent to find
-+ *
-+ * fdt_node_depth() finds the depth of a given node. The root node
-+ * has depth 0, its immediate subnodes depth 1 and so forth.
-+ *
-+ * NOTE: This function is expensive, as it must scan the device tree
-+ * structure from the start to nodeoffset.
-+ *
-+ * returns:
-+ * depth of the node at nodeoffset (>=0), on success
-+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE, standard meanings
-+ */
-+int fdt_node_depth(const void *fdt, int nodeoffset);
-+
-+/**
-+ * fdt_parent_offset - find the parent of a given node
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose parent to find
-+ *
-+ * fdt_parent_offset() locates the parent node of a given node (that
-+ * is, it finds the offset of the node which contains the node at
-+ * nodeoffset as a subnode).
-+ *
-+ * NOTE: This function is expensive, as it must scan the device tree
-+ * structure from the start to nodeoffset, *twice*.
-+ *
-+ * returns:
-+ * structure block offset of the parent of the node at nodeoffset
-+ * (>=0), on success
-+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE, standard meanings
-+ */
-+int fdt_parent_offset(const void *fdt, int nodeoffset);
-+
-+/**
-+ * fdt_node_offset_by_prop_value - find nodes with a given property value
-+ * @fdt: pointer to the device tree blob
-+ * @startoffset: only find nodes after this offset
-+ * @propname: property name to check
-+ * @propval: property value to search for
-+ * @proplen: length of the value in propval
-+ *
-+ * fdt_node_offset_by_prop_value() returns the offset of the first
-+ * node after startoffset, which has a property named propname whose
-+ * value is of length proplen and has value equal to propval; or if
-+ * startoffset is -1, the very first such node in the tree.
-+ *
-+ * To iterate through all nodes matching the criterion, the following
-+ * idiom can be used:
-+ * offset = fdt_node_offset_by_prop_value(fdt, -1, propname,
-+ * propval, proplen);
-+ * while (offset != -FDT_ERR_NOTFOUND) {
-+ * // other code here
-+ * offset = fdt_node_offset_by_prop_value(fdt, offset, propname,
-+ * propval, proplen);
-+ * }
-+ *
-+ * Note the -1 in the first call to the function, if 0 is used here
-+ * instead, the function will never locate the root node, even if it
-+ * matches the criterion.
-+ *
-+ * returns:
-+ * structure block offset of the located node (>= 0, >startoffset),
-+ * on success
-+ * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the
-+ * tree after startoffset
-+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE, standard meanings
-+ */
-+int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,
-+ const char *propname,
-+ const void *propval, int proplen);
-+
-+/**
-+ * fdt_node_offset_by_phandle - find the node with a given phandle
-+ * @fdt: pointer to the device tree blob
-+ * @phandle: phandle value
-+ *
-+ * fdt_node_offset_by_phandle() returns the offset of the node
-+ * which has the given phandle value. If there is more than one node
-+ * in the tree with the given phandle (an invalid tree), results are
-+ * undefined.
-+ *
-+ * returns:
-+ * structure block offset of the located node (>= 0), on success
-+ * -FDT_ERR_NOTFOUND, no node with that phandle exists
-+ * -FDT_ERR_BADPHANDLE, given phandle value was invalid (0 or -1)
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE, standard meanings
-+ */
-+int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle);
-+
-+/**
-+ * fdt_node_check_compatible - check a node's compatible property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of a tree node
-+ * @compatible: string to match against
-+ *
-+ * fdt_node_check_compatible() returns 0 if the given node contains a
-+ * @compatible property with the given string as one of its elements,
-+ * it returns non-zero otherwise, or on error.
-+ *
-+ * returns:
-+ * 0, if the node has a 'compatible' property listing the given string
-+ * 1, if the node has a 'compatible' property, but it does not list
-+ * the given string
-+ * -FDT_ERR_NOTFOUND, if the given node has no 'compatible' property
-+ * -FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE, standard meanings
-+ */
-+int fdt_node_check_compatible(const void *fdt, int nodeoffset,
-+ const char *compatible);
-+
-+/**
-+ * fdt_node_offset_by_compatible - find nodes with a given 'compatible' value
-+ * @fdt: pointer to the device tree blob
-+ * @startoffset: only find nodes after this offset
-+ * @compatible: 'compatible' string to match against
-+ *
-+ * fdt_node_offset_by_compatible() returns the offset of the first
-+ * node after startoffset, which has a 'compatible' property which
-+ * lists the given compatible string; or if startoffset is -1, the
-+ * very first such node in the tree.
-+ *
-+ * To iterate through all nodes matching the criterion, the following
-+ * idiom can be used:
-+ * offset = fdt_node_offset_by_compatible(fdt, -1, compatible);
-+ * while (offset != -FDT_ERR_NOTFOUND) {
-+ * // other code here
-+ * offset = fdt_node_offset_by_compatible(fdt, offset, compatible);
-+ * }
-+ *
-+ * Note the -1 in the first call to the function, if 0 is used here
-+ * instead, the function will never locate the root node, even if it
-+ * matches the criterion.
-+ *
-+ * returns:
-+ * structure block offset of the located node (>= 0, >startoffset),
-+ * on success
-+ * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the
-+ * tree after startoffset
-+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE, standard meanings
-+ */
-+int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
-+ const char *compatible);
-+
-+/**
-+ * fdt_stringlist_contains - check a string list property for a string
-+ * @strlist: Property containing a list of strings to check
-+ * @listlen: Length of property
-+ * @str: String to search for
-+ *
-+ * This is a utility function provided for convenience. The list contains
-+ * one or more strings, each terminated by \0, as is found in a device tree
-+ * "compatible" property.
-+ *
-+ * Return: 1 if the string is found in the list, 0 not found, or invalid list
-+ */
-+int fdt_stringlist_contains(const char *strlist, int listlen, const char *str);
-+
-+/**
-+ * fdt_stringlist_count - count the number of strings in a string list
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of a tree node
-+ * @property: name of the property containing the string list
-+ *
-+ * Return:
-+ * the number of strings in the given property
-+ * -FDT_ERR_BADVALUE if the property value is not NUL-terminated
-+ * -FDT_ERR_NOTFOUND if the property does not exist
-+ */
-+int fdt_stringlist_count(const void *fdt, int nodeoffset, const char *property);
-+
-+/**
-+ * fdt_stringlist_search - find a string in a string list and return its index
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of a tree node
-+ * @property: name of the property containing the string list
-+ * @string: string to look up in the string list
-+ *
-+ * Note that it is possible for this function to succeed on property values
-+ * that are not NUL-terminated. That's because the function will stop after
-+ * finding the first occurrence of @string. This can for example happen with
-+ * small-valued cell properties, such as #address-cells, when searching for
-+ * the empty string.
-+ *
-+ * return:
-+ * the index of the string in the list of strings
-+ * -FDT_ERR_BADVALUE if the property value is not NUL-terminated
-+ * -FDT_ERR_NOTFOUND if the property does not exist or does not contain
-+ * the given string
-+ */
-+int fdt_stringlist_search(const void *fdt, int nodeoffset, const char *property,
-+ const char *string);
-+
-+/**
-+ * fdt_stringlist_get() - obtain the string at a given index in a string list
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of a tree node
-+ * @property: name of the property containing the string list
-+ * @index: index of the string to return
-+ * @lenp: return location for the string length or an error code on failure
-+ *
-+ * Note that this will successfully extract strings from properties with
-+ * non-NUL-terminated values. For example on small-valued cell properties
-+ * this function will return the empty string.
-+ *
-+ * If non-NULL, the length of the string (on success) or a negative error-code
-+ * (on failure) will be stored in the integer pointer to by lenp.
-+ *
-+ * Return:
-+ * A pointer to the string at the given index in the string list or NULL on
-+ * failure. On success the length of the string will be stored in the memory
-+ * location pointed to by the lenp parameter, if non-NULL. On failure one of
-+ * the following negative error codes will be returned in the lenp parameter
-+ * (if non-NULL):
-+ * -FDT_ERR_BADVALUE if the property value is not NUL-terminated
-+ * -FDT_ERR_NOTFOUND if the property does not exist
-+ */
-+const char *fdt_stringlist_get(const void *fdt, int nodeoffset,
-+ const char *property, int index,
-+ int *lenp);
-+
-+/**********************************************************************/
-+/* Read-only functions (addressing related) */
-+/**********************************************************************/
-+
-+/**
-+ * FDT_MAX_NCELLS - maximum value for #address-cells and #size-cells
-+ *
-+ * This is the maximum value for #address-cells, #size-cells and
-+ * similar properties that will be processed by libfdt. IEE1275
-+ * requires that OF implementations handle values up to 4.
-+ * Implementations may support larger values, but in practice higher
-+ * values aren't used.
-+ */
-+#define FDT_MAX_NCELLS 4
-+
-+/**
-+ * fdt_address_cells - retrieve address size for a bus represented in the tree
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node to find the address size for
-+ *
-+ * When the node has a valid #address-cells property, returns its value.
-+ *
-+ * returns:
-+ * 0 <= n < FDT_MAX_NCELLS, on success
-+ * 2, if the node has no #address-cells property
-+ * -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid
-+ * #address-cells property
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_address_cells(const void *fdt, int nodeoffset);
-+
-+/**
-+ * fdt_size_cells - retrieve address range size for a bus represented in the
-+ * tree
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node to find the address range size for
-+ *
-+ * When the node has a valid #size-cells property, returns its value.
-+ *
-+ * returns:
-+ * 0 <= n < FDT_MAX_NCELLS, on success
-+ * 1, if the node has no #size-cells property
-+ * -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid
-+ * #size-cells property
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_size_cells(const void *fdt, int nodeoffset);
-+
-+
-+/**********************************************************************/
-+/* Write-in-place functions */
-+/**********************************************************************/
-+
-+/**
-+ * fdt_setprop_inplace_namelen_partial - change a property's value,
-+ * but not its size
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @namelen: number of characters of name to consider
-+ * @idx: index of the property to change in the array
-+ * @val: pointer to data to replace the property value with
-+ * @len: length of the property value
-+ *
-+ * Identical to fdt_setprop_inplace(), but modifies the given property
-+ * starting from the given index, and using only the first characters
-+ * of the name. It is useful when you want to manipulate only one value of
-+ * an array and you have a string that doesn't end with \0.
-+ *
-+ * Return: 0 on success, negative libfdt error value otherwise
-+ */
-+#ifndef SWIG /* Not available in Python */
-+int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
-+ const char *name, int namelen,
-+ uint32_t idx, const void *val,
-+ int len);
-+#endif
-+
-+/**
-+ * fdt_setprop_inplace - change a property's value, but not its size
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: pointer to data to replace the property value with
-+ * @len: length of the property value
-+ *
-+ * fdt_setprop_inplace() replaces the value of a given property with
-+ * the data in val, of length len. This function cannot change the
-+ * size of a property, and so will only work if len is equal to the
-+ * current length of the property.
-+ *
-+ * This function will alter only the bytes in the blob which contain
-+ * the given property value, and will not alter or move any other part
-+ * of the tree.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, if len is not equal to the property's current length
-+ * -FDT_ERR_NOTFOUND, node does not have the named property
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+#ifndef SWIG /* Not available in Python */
-+int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
-+ const void *val, int len);
-+#endif
-+
-+/**
-+ * fdt_setprop_inplace_u32 - change the value of a 32-bit integer property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: 32-bit integer value to replace the property with
-+ *
-+ * fdt_setprop_inplace_u32() replaces the value of a given property
-+ * with the 32-bit integer value in val, converting val to big-endian
-+ * if necessary. This function cannot change the size of a property,
-+ * and so will only work if the property already exists and has length
-+ * 4.
-+ *
-+ * This function will alter only the bytes in the blob which contain
-+ * the given property value, and will not alter or move any other part
-+ * of the tree.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, if the property's length is not equal to 4
-+ * -FDT_ERR_NOTFOUND, node does not have the named property
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+static inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset,
-+ const char *name, uint32_t val)
-+{
-+ fdt32_t tmp = cpu_to_fdt32(val);
-+ return fdt_setprop_inplace(fdt, nodeoffset, name, &tmp, sizeof(tmp));
-+}
-+
-+/**
-+ * fdt_setprop_inplace_u64 - change the value of a 64-bit integer property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: 64-bit integer value to replace the property with
-+ *
-+ * fdt_setprop_inplace_u64() replaces the value of a given property
-+ * with the 64-bit integer value in val, converting val to big-endian
-+ * if necessary. This function cannot change the size of a property,
-+ * and so will only work if the property already exists and has length
-+ * 8.
-+ *
-+ * This function will alter only the bytes in the blob which contain
-+ * the given property value, and will not alter or move any other part
-+ * of the tree.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, if the property's length is not equal to 8
-+ * -FDT_ERR_NOTFOUND, node does not have the named property
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+static inline int fdt_setprop_inplace_u64(void *fdt, int nodeoffset,
-+ const char *name, uint64_t val)
-+{
-+ fdt64_t tmp = cpu_to_fdt64(val);
-+ return fdt_setprop_inplace(fdt, nodeoffset, name, &tmp, sizeof(tmp));
-+}
-+
-+/**
-+ * fdt_setprop_inplace_cell - change the value of a single-cell property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node containing the property
-+ * @name: name of the property to change the value of
-+ * @val: new value of the 32-bit cell
-+ *
-+ * This is an alternative name for fdt_setprop_inplace_u32()
-+ * Return: 0 on success, negative libfdt error number otherwise.
-+ */
-+static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset,
-+ const char *name, uint32_t val)
-+{
-+ return fdt_setprop_inplace_u32(fdt, nodeoffset, name, val);
-+}
-+
-+/**
-+ * fdt_nop_property - replace a property with nop tags
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to nop
-+ * @name: name of the property to nop
-+ *
-+ * fdt_nop_property() will replace a given property's representation
-+ * in the blob with FDT_NOP tags, effectively removing it from the
-+ * tree.
-+ *
-+ * This function will alter only the bytes in the blob which contain
-+ * the property, and will not alter or move any other part of the
-+ * tree.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOTFOUND, node does not have the named property
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_nop_property(void *fdt, int nodeoffset, const char *name);
-+
-+/**
-+ * fdt_nop_node - replace a node (subtree) with nop tags
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node to nop
-+ *
-+ * fdt_nop_node() will replace a given node's representation in the
-+ * blob, including all its subnodes, if any, with FDT_NOP tags,
-+ * effectively removing it from the tree.
-+ *
-+ * This function will alter only the bytes in the blob which contain
-+ * the node and its properties and subnodes, and will not alter or
-+ * move any other part of the tree.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_nop_node(void *fdt, int nodeoffset);
-+
-+/**********************************************************************/
-+/* Sequential write functions */
-+/**********************************************************************/
-+
-+/* fdt_create_with_flags flags */
-+#define FDT_CREATE_FLAG_NO_NAME_DEDUP 0x1
-+ /* FDT_CREATE_FLAG_NO_NAME_DEDUP: Do not try to de-duplicate property
-+ * names in the fdt. This can result in faster creation times, but
-+ * a larger fdt. */
-+
-+#define FDT_CREATE_FLAGS_ALL (FDT_CREATE_FLAG_NO_NAME_DEDUP)
-+
-+/**
-+ * fdt_create_with_flags - begin creation of a new fdt
-+ * @buf: pointer to memory allocated where fdt will be created
-+ * @bufsize: size of the memory space at fdt
-+ * @flags: a valid combination of FDT_CREATE_FLAG_ flags, or 0.
-+ *
-+ * fdt_create_with_flags() begins the process of creating a new fdt with
-+ * the sequential write interface.
-+ *
-+ * fdt creation process must end with fdt_finished() to produce a valid fdt.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, bufsize is insufficient for a minimal fdt
-+ * -FDT_ERR_BADFLAGS, flags is not valid
-+ */
-+int fdt_create_with_flags(void *buf, int bufsize, uint32_t flags);
-+
-+/**
-+ * fdt_create - begin creation of a new fdt
-+ * @buf: pointer to memory allocated where fdt will be created
-+ * @bufsize: size of the memory space at fdt
-+ *
-+ * fdt_create() is equivalent to fdt_create_with_flags() with flags=0.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, bufsize is insufficient for a minimal fdt
-+ */
-+int fdt_create(void *buf, int bufsize);
-+
-+int fdt_resize(void *fdt, void *buf, int bufsize);
-+int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);
-+int fdt_finish_reservemap(void *fdt);
-+int fdt_begin_node(void *fdt, const char *name);
-+int fdt_property(void *fdt, const char *name, const void *val, int len);
-+static inline int fdt_property_u32(void *fdt, const char *name, uint32_t val)
-+{
-+ fdt32_t tmp = cpu_to_fdt32(val);
-+ return fdt_property(fdt, name, &tmp, sizeof(tmp));
-+}
-+static inline int fdt_property_u64(void *fdt, const char *name, uint64_t val)
-+{
-+ fdt64_t tmp = cpu_to_fdt64(val);
-+ return fdt_property(fdt, name, &tmp, sizeof(tmp));
-+}
-+
-+#ifndef SWIG /* Not available in Python */
-+static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)
-+{
-+ return fdt_property_u32(fdt, name, val);
-+}
-+#endif
-+
-+/**
-+ * fdt_property_placeholder - add a new property and return a ptr to its value
-+ *
-+ * @fdt: pointer to the device tree blob
-+ * @name: name of property to add
-+ * @len: length of property value in bytes
-+ * @valp: returns a pointer to where where the value should be placed
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_NOSPACE, standard meanings
-+ */
-+int fdt_property_placeholder(void *fdt, const char *name, int len, void **valp);
-+
-+#define fdt_property_string(fdt, name, str) \
-+ fdt_property(fdt, name, str, strlen(str)+1)
-+int fdt_end_node(void *fdt);
-+int fdt_finish(void *fdt);
-+
-+/**********************************************************************/
-+/* Read-write functions */
-+/**********************************************************************/
-+
-+int fdt_create_empty_tree(void *buf, int bufsize);
-+int fdt_open_into(const void *fdt, void *buf, int bufsize);
-+int fdt_pack(void *fdt);
-+
-+/**
-+ * fdt_add_mem_rsv - add one memory reserve map entry
-+ * @fdt: pointer to the device tree blob
-+ * @address: 64-bit start address of the reserve map entry
-+ * @size: 64-bit size of the reserved region
-+ *
-+ * Adds a reserve map entry to the given blob reserving a region at
-+ * address address of length size.
-+ *
-+ * This function will insert data into the reserve map and will
-+ * therefore change the indexes of some entries in the table.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new reservation entry
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size);
-+
-+/**
-+ * fdt_del_mem_rsv - remove a memory reserve map entry
-+ * @fdt: pointer to the device tree blob
-+ * @n: entry to remove
-+ *
-+ * fdt_del_mem_rsv() removes the n-th memory reserve map entry from
-+ * the blob.
-+ *
-+ * This function will delete data from the reservation table and will
-+ * therefore change the indexes of some entries in the table.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOTFOUND, there is no entry of the given index (i.e. there
-+ * are less than n+1 reserve map entries)
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_del_mem_rsv(void *fdt, int n);
-+
-+/**
-+ * fdt_set_name - change the name of a given node
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: structure block offset of a node
-+ * @name: name to give the node
-+ *
-+ * fdt_set_name() replaces the name (including unit address, if any)
-+ * of the given node with the given string. NOTE: this function can't
-+ * efficiently check if the new name is unique amongst the given
-+ * node's siblings; results are undefined if this function is invoked
-+ * with a name equal to one of the given node's siblings.
-+ *
-+ * This function may insert or delete data from the blob, and will
-+ * therefore change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob
-+ * to contain the new name
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE, standard meanings
-+ */
-+int fdt_set_name(void *fdt, int nodeoffset, const char *name);
-+
-+/**
-+ * fdt_setprop - create or change a property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: pointer to data to set the property value to
-+ * @len: length of the property value
-+ *
-+ * fdt_setprop() sets the value of the named property in the given
-+ * node to the given value and length, creating the property if it
-+ * does not already exist.
-+ *
-+ * This function may insert or delete data from the blob, and will
-+ * therefore change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_setprop(void *fdt, int nodeoffset, const char *name,
-+ const void *val, int len);
-+
-+/**
-+ * fdt_setprop_placeholder - allocate space for a property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @len: length of the property value
-+ * @prop_data: return pointer to property data
-+ *
-+ * fdt_setprop_placeholer() allocates the named property in the given node.
-+ * If the property exists it is resized. In either case a pointer to the
-+ * property data is returned.
-+ *
-+ * This function may insert or delete data from the blob, and will
-+ * therefore change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_setprop_placeholder(void *fdt, int nodeoffset, const char *name,
-+ int len, void **prop_data);
-+
-+/**
-+ * fdt_setprop_u32 - set a property to a 32-bit integer
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: 32-bit integer value for the property (native endian)
-+ *
-+ * fdt_setprop_u32() sets the value of the named property in the given
-+ * node to the given 32-bit integer value (converting to big-endian if
-+ * necessary), or creates a new property with that value if it does
-+ * not already exist.
-+ *
-+ * This function may insert or delete data from the blob, and will
-+ * therefore change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+static inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name,
-+ uint32_t val)
-+{
-+ fdt32_t tmp = cpu_to_fdt32(val);
-+ return fdt_setprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
-+}
-+
-+/**
-+ * fdt_setprop_u64 - set a property to a 64-bit integer
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: 64-bit integer value for the property (native endian)
-+ *
-+ * fdt_setprop_u64() sets the value of the named property in the given
-+ * node to the given 64-bit integer value (converting to big-endian if
-+ * necessary), or creates a new property with that value if it does
-+ * not already exist.
-+ *
-+ * This function may insert or delete data from the blob, and will
-+ * therefore change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+static inline int fdt_setprop_u64(void *fdt, int nodeoffset, const char *name,
-+ uint64_t val)
-+{
-+ fdt64_t tmp = cpu_to_fdt64(val);
-+ return fdt_setprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
-+}
-+
-+/**
-+ * fdt_setprop_cell - set a property to a single cell value
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: 32-bit integer value for the property (native endian)
-+ *
-+ * This is an alternative name for fdt_setprop_u32()
-+ *
-+ * Return: 0 on success, negative libfdt error value otherwise.
-+ */
-+static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
-+ uint32_t val)
-+{
-+ return fdt_setprop_u32(fdt, nodeoffset, name, val);
-+}
-+
-+/**
-+ * fdt_setprop_string - set a property to a string value
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @str: string value for the property
-+ *
-+ * fdt_setprop_string() sets the value of the named property in the
-+ * given node to the given string value (using the length of the
-+ * string to determine the new length of the property), or creates a
-+ * new property with that value if it does not already exist.
-+ *
-+ * This function may insert or delete data from the blob, and will
-+ * therefore change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+#define fdt_setprop_string(fdt, nodeoffset, name, str) \
-+ fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
-+
-+
-+/**
-+ * fdt_setprop_empty - set a property to an empty value
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ *
-+ * fdt_setprop_empty() sets the value of the named property in the
-+ * given node to an empty (zero length) value, or creates a new empty
-+ * property if it does not already exist.
-+ *
-+ * This function may insert or delete data from the blob, and will
-+ * therefore change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+#define fdt_setprop_empty(fdt, nodeoffset, name) \
-+ fdt_setprop((fdt), (nodeoffset), (name), NULL, 0)
-+
-+/**
-+ * fdt_appendprop - append to or create a property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to append to
-+ * @val: pointer to data to append to the property value
-+ * @len: length of the data to append to the property value
-+ *
-+ * fdt_appendprop() appends the value to the named property in the
-+ * given node, creating the property if it does not already exist.
-+ *
-+ * This function may insert data into the blob, and will therefore
-+ * change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
-+ const void *val, int len);
-+
-+/**
-+ * fdt_appendprop_u32 - append a 32-bit integer value to a property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: 32-bit integer value to append to the property (native endian)
-+ *
-+ * fdt_appendprop_u32() appends the given 32-bit integer value
-+ * (converting to big-endian if necessary) to the value of the named
-+ * property in the given node, or creates a new property with that
-+ * value if it does not already exist.
-+ *
-+ * This function may insert data into the blob, and will therefore
-+ * change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+static inline int fdt_appendprop_u32(void *fdt, int nodeoffset,
-+ const char *name, uint32_t val)
-+{
-+ fdt32_t tmp = cpu_to_fdt32(val);
-+ return fdt_appendprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
-+}
-+
-+/**
-+ * fdt_appendprop_u64 - append a 64-bit integer value to a property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: 64-bit integer value to append to the property (native endian)
-+ *
-+ * fdt_appendprop_u64() appends the given 64-bit integer value
-+ * (converting to big-endian if necessary) to the value of the named
-+ * property in the given node, or creates a new property with that
-+ * value if it does not already exist.
-+ *
-+ * This function may insert data into the blob, and will therefore
-+ * change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+static inline int fdt_appendprop_u64(void *fdt, int nodeoffset,
-+ const char *name, uint64_t val)
-+{
-+ fdt64_t tmp = cpu_to_fdt64(val);
-+ return fdt_appendprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
-+}
-+
-+/**
-+ * fdt_appendprop_cell - append a single cell value to a property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @val: 32-bit integer value to append to the property (native endian)
-+ *
-+ * This is an alternative name for fdt_appendprop_u32()
-+ *
-+ * Return: 0 on success, negative libfdt error value otherwise.
-+ */
-+static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,
-+ const char *name, uint32_t val)
-+{
-+ return fdt_appendprop_u32(fdt, nodeoffset, name, val);
-+}
-+
-+/**
-+ * fdt_appendprop_string - append a string to a property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to change
-+ * @name: name of the property to change
-+ * @str: string value to append to the property
-+ *
-+ * fdt_appendprop_string() appends the given string to the value of
-+ * the named property in the given node, or creates a new property
-+ * with that value if it does not already exist.
-+ *
-+ * This function may insert data into the blob, and will therefore
-+ * change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain the new property value
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+#define fdt_appendprop_string(fdt, nodeoffset, name, str) \
-+ fdt_appendprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
-+
-+/**
-+ * fdt_appendprop_addrrange - append a address range property
-+ * @fdt: pointer to the device tree blob
-+ * @parent: offset of the parent node
-+ * @nodeoffset: offset of the node to add a property at
-+ * @name: name of property
-+ * @addr: start address of a given range
-+ * @size: size of a given range
-+ *
-+ * fdt_appendprop_addrrange() appends an address range value (start
-+ * address and size) to the value of the named property in the given
-+ * node, or creates a new property with that value if it does not
-+ * already exist.
-+ * If "name" is not specified, a default "reg" is used.
-+ * Cell sizes are determined by parent's #address-cells and #size-cells.
-+ *
-+ * This function may insert data into the blob, and will therefore
-+ * change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid
-+ * #address-cells property
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADVALUE, addr or size doesn't fit to respective cells size
-+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
-+ * contain a new property
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_appendprop_addrrange(void *fdt, int parent, int nodeoffset,
-+ const char *name, uint64_t addr, uint64_t size);
-+
-+/**
-+ * fdt_delprop - delete a property
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node whose property to nop
-+ * @name: name of the property to nop
-+ *
-+ * fdt_del_property() will delete the given property.
-+ *
-+ * This function will delete data from the blob, and will therefore
-+ * change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOTFOUND, node does not have the named property
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_delprop(void *fdt, int nodeoffset, const char *name);
-+
-+/**
-+ * fdt_add_subnode_namelen - creates a new node based on substring
-+ * @fdt: pointer to the device tree blob
-+ * @parentoffset: structure block offset of a node
-+ * @name: name of the subnode to create
-+ * @namelen: number of characters of name to consider
-+ *
-+ * Identical to fdt_add_subnode(), but use only the first @namelen
-+ * characters of @name as the name of the new node. This is useful for
-+ * creating subnodes based on a portion of a larger string, such as a
-+ * full path.
-+ *
-+ * Return: structure block offset of the created subnode (>=0),
-+ * negative libfdt error value otherwise
-+ */
-+#ifndef SWIG /* Not available in Python */
-+int fdt_add_subnode_namelen(void *fdt, int parentoffset,
-+ const char *name, int namelen);
-+#endif
-+
-+/**
-+ * fdt_add_subnode - creates a new node
-+ * @fdt: pointer to the device tree blob
-+ * @parentoffset: structure block offset of a node
-+ * @name: name of the subnode to locate
-+ *
-+ * fdt_add_subnode() creates a new node as a subnode of the node at
-+ * structure block offset parentoffset, with the given name (which
-+ * should include the unit address, if any).
-+ *
-+ * This function will insert data into the blob, and will therefore
-+ * change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * structure block offset of the created nodeequested subnode (>=0), on
-+ * success
-+ * -FDT_ERR_NOTFOUND, if the requested subnode does not exist
-+ * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE
-+ * tag
-+ * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of
-+ * the given name
-+ * -FDT_ERR_NOSPACE, if there is insufficient free space in the
-+ * blob to contain the new node
-+ * -FDT_ERR_NOSPACE
-+ * -FDT_ERR_BADLAYOUT
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings.
-+ */
-+int fdt_add_subnode(void *fdt, int parentoffset, const char *name);
-+
-+/**
-+ * fdt_del_node - delete a node (subtree)
-+ * @fdt: pointer to the device tree blob
-+ * @nodeoffset: offset of the node to nop
-+ *
-+ * fdt_del_node() will remove the given node, including all its
-+ * subnodes if any, from the blob.
-+ *
-+ * This function will delete data from the blob, and will therefore
-+ * change the offsets of some existing nodes.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_del_node(void *fdt, int nodeoffset);
-+
-+/**
-+ * fdt_overlay_apply - Applies a DT overlay on a base DT
-+ * @fdt: pointer to the base device tree blob
-+ * @fdto: pointer to the device tree overlay blob
-+ *
-+ * fdt_overlay_apply() will apply the given device tree overlay on the
-+ * given base device tree.
-+ *
-+ * Expect the base device tree to be modified, even if the function
-+ * returns an error.
-+ *
-+ * returns:
-+ * 0, on success
-+ * -FDT_ERR_NOSPACE, there's not enough space in the base device tree
-+ * -FDT_ERR_NOTFOUND, the overlay points to some inexistant nodes or
-+ * properties in the base DT
-+ * -FDT_ERR_BADPHANDLE,
-+ * -FDT_ERR_BADOVERLAY,
-+ * -FDT_ERR_NOPHANDLES,
-+ * -FDT_ERR_INTERNAL,
-+ * -FDT_ERR_BADLAYOUT,
-+ * -FDT_ERR_BADMAGIC,
-+ * -FDT_ERR_BADOFFSET,
-+ * -FDT_ERR_BADPATH,
-+ * -FDT_ERR_BADVERSION,
-+ * -FDT_ERR_BADSTRUCTURE,
-+ * -FDT_ERR_BADSTATE,
-+ * -FDT_ERR_TRUNCATED, standard meanings
-+ */
-+int fdt_overlay_apply(void *fdt, void *fdto);
-+
-+/**
-+ * fdt_overlay_target_offset - retrieves the offset of a fragment's target
-+ * @fdt: Base device tree blob
-+ * @fdto: Device tree overlay blob
-+ * @fragment_offset: node offset of the fragment in the overlay
-+ * @pathp: pointer which receives the path of the target (or NULL)
-+ *
-+ * fdt_overlay_target_offset() retrieves the target offset in the base
-+ * device tree of a fragment, no matter how the actual targeting is
-+ * done (through a phandle or a path)
-+ *
-+ * returns:
-+ * the targeted node offset in the base device tree
-+ * Negative error code on error
-+ */
-+int fdt_overlay_target_offset(const void *fdt, const void *fdto,
-+ int fragment_offset, char const **pathp);
-+
-+/**********************************************************************/
-+/* Debugging / informational functions */
-+/**********************************************************************/
-+
-+const char *fdt_strerror(int errval);
-+
-+#ifdef __cplusplus
-+}
-+#endif
-+
-+#endif /* LIBFDT_H */
-diff --git a/include/libfdt_env.h b/include/libfdt_env.h
-new file mode 100644
-index 0000000..51b31d1
---- /dev/null
-+++ b/include/libfdt_env.h
-@@ -0,0 +1,95 @@
-+/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
-+#ifndef LIBFDT_ENV_H
-+#define LIBFDT_ENV_H
-+/*
-+ * libfdt - Flat Device Tree manipulation
-+ * Copyright (C) 2006 David Gibson, IBM Corporation.
-+ * Copyright 2012 Kim Phillips, Freescale Semiconductor.
-+ */
-+
-+#include <stdbool.h>
-+#include <stddef.h>
-+#include <stdint.h>
-+#include <limits.h>
-+#include <string.h>
-+
-+#ifdef __CHECKER__
-+#define FDT_FORCE __attribute__((force))
-+#define FDT_BITWISE __attribute__((bitwise))
-+#else
-+#define FDT_FORCE
-+#define FDT_BITWISE
-+#endif
-+
-+typedef uint16_t FDT_BITWISE fdt16_t;
-+typedef uint32_t FDT_BITWISE fdt32_t;
-+typedef uint64_t FDT_BITWISE fdt64_t;
-+
-+#define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
-+#define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
-+#define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
-+ (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
-+#define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
-+ (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
-+ (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
-+ (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
-+
-+static inline uint16_t fdt16_to_cpu(fdt16_t x)
-+{
-+ return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
-+}
-+static inline fdt16_t cpu_to_fdt16(uint16_t x)
-+{
-+ return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
-+}
-+
-+static inline uint32_t fdt32_to_cpu(fdt32_t x)
-+{
-+ return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
-+}
-+static inline fdt32_t cpu_to_fdt32(uint32_t x)
-+{
-+ return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
-+}
-+
-+static inline uint64_t fdt64_to_cpu(fdt64_t x)
-+{
-+ return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
-+}
-+static inline fdt64_t cpu_to_fdt64(uint64_t x)
-+{
-+ return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
-+}
-+#undef CPU_TO_FDT64
-+#undef CPU_TO_FDT32
-+#undef CPU_TO_FDT16
-+#undef EXTRACT_BYTE
-+
-+#ifdef __APPLE__
-+#include <AvailabilityMacros.h>
-+
-+/* strnlen() is not available on Mac OS < 10.7 */
-+# if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
-+ MAC_OS_X_VERSION_10_7)
-+
-+#define strnlen fdt_strnlen
-+
-+/*
-+ * fdt_strnlen: returns the length of a string or max_count - which ever is
-+ * smallest.
-+ * Input 1 string: the string whose size is to be determined
-+ * Input 2 max_count: the maximum value returned by this function
-+ * Output: length of the string or max_count (the smallest of the two)
-+ */
-+static inline size_t fdt_strnlen(const char *string, size_t max_count)
-+{
-+ const char *p = memchr(string, 0, max_count);
-+ return p ? p - string : max_count;
-+}
-+
-+#endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
-+ MAC_OS_X_VERSION_10_7) */
-+
-+#endif /* __APPLE__ */
-+
-+#endif /* LIBFDT_ENV_H */
deleted file mode 100644
@@ -1,101 +0,0 @@
-From e2eff4f80e65cb3fcbe6345b5376a6bf7de7e2cc Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 28 Dec 2021 17:28:25 +0800
-Subject: [PATCH] common: Add essential libc functions
-
-The libfdt uses some of the libc functions, e.g. memcmp, memmove,
-strlen .etc. Add them in lib.c.
-
-The code is copied from TF-A (v2.5) [1] project, which is under the
-terms of BSD license. It is the same with boot-wrapper.
-
-[1]: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git
-
-Issue-Id: SCM-3814
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: If3b55b00afa8694c7522df989a41e0b38eda1d38
----
- common/lib.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++-
- 1 file changed, 70 insertions(+), 1 deletion(-)
-
-diff --git a/common/lib.c b/common/lib.c
-index fcf5f69..0be1c4a 100644
---- a/common/lib.c
-+++ b/common/lib.c
-@@ -32,4 +32,73 @@ void *memset(void *s, int c, size_t n)
- return s;
- }
-
--/* TODO: memmove and memcmp could also be called */
-+int memcmp(const void *s1, const void *s2, size_t len)
-+{
-+ const unsigned char *s = s1;
-+ const unsigned char *d = s2;
-+ unsigned char sc;
-+ unsigned char dc;
-+
-+ while (len--) {
-+ sc = *s++;
-+ dc = *d++;
-+ if (sc - dc)
-+ return (sc - dc);
-+ }
-+
-+ return 0;
-+}
-+
-+void *memmove(void *dst, const void *src, size_t len)
-+{
-+ if ((size_t)dst - (size_t)src >= len) {
-+ /* destination not in source data, so can safely use memcpy */
-+ return memcpy(dst, src, len);
-+ } else {
-+ /* copy backwards... */
-+ const char *end = dst;
-+ const char *s = (const char *)src + len;
-+ char *d = (char *)dst + len;
-+ while (d != end)
-+ *--d = *--s;
-+ }
-+ return dst;
-+}
-+
-+void *memchr(const void *src, int c, size_t len)
-+{
-+ const unsigned char *s = src;
-+
-+ while (len--) {
-+ if (*s == (unsigned char)c)
-+ return (void *) s;
-+ s++;
-+ }
-+
-+ return NULL;
-+}
-+
-+char *strrchr(const char *p, int ch)
-+{
-+ char *save;
-+ char c;
-+
-+ c = ch;
-+ for (save = NULL;; ++p) {
-+ if (*p == c)
-+ save = (char *)p;
-+ if (*p == '\0')
-+ return (save);
-+ }
-+ /* NOTREACHED */
-+}
-+
-+size_t strlen(const char *s)
-+{
-+ const char *cursor = s;
-+
-+ while (*cursor)
-+ cursor++;
-+
-+ return cursor - s;
-+}
deleted file mode 100644
@@ -1,61 +0,0 @@
-From f4d5cf4c3424598a2b3bb391717313b70c79ea28 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 28 Dec 2021 17:42:48 +0800
-Subject: [PATCH] Makefile: Add the libfdt to the Makefile system
-
-Add the libfdt into Makefile system. The libfdt uses const value and
-thus gcc will enable the stack guard. The stack guard will fail the
-compile. Add -fno-stack-protector to fix it.
-
-Issue-Id: SCM-3814
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: I472bc28cdc5cde3b22461a4b7d7a3752ae382b4b
----
- Makefile.am | 11 +++++++++--
- 1 file changed, 9 insertions(+), 2 deletions(-)
-
-diff --git a/Makefile.am b/Makefile.am
-index fc66662..ab2c3a9 100644
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -36,6 +36,9 @@ PSCI_CPU_OFF := 0x84000002
- COMMON_SRC := common/
- COMMON_OBJ := boot.o bakery_lock.o platform.o lib.o
-
-+LIBFDT_SRC := common/libfdt/
-+LIBFDT_OBJS := fdt.o fdt_ro.o fdt_rw.o
-+
- ARCH_OBJ := boot.o stack.o utils.o
-
- if BOOTWRAPPER_32
-@@ -127,11 +130,12 @@ CFLAGS += -I$(top_srcdir)/include/ -I$(top_srcdir)/$(ARCH_SRC)/include/
- CFLAGS += -Wall -fomit-frame-pointer
- CFLAGS += -ffreestanding -nostdlib
- CFLAGS += -fno-stack-protector
-+CFLAGS += -fno-stack-protector
- CFLAGS += -ffunction-sections -fdata-sections
- CFLAGS += -fno-pic -fno-pie
- LDFLAGS += --gc-sections
-
--OBJ := $(addprefix $(ARCH_SRC),$(ARCH_OBJ)) $(addprefix $(COMMON_SRC),$(COMMON_OBJ))
-+OBJ := $(addprefix $(ARCH_SRC),$(ARCH_OBJ)) $(addprefix $(COMMON_SRC),$(COMMON_OBJ)) $(addprefix $(LIBFDT_SRC),$(LIBFDT_OBJS))
-
- # Don't lookup all prerequisites in $(top_srcdir), only the source files. When
- # building outside the source tree $(ARCH_SRC) needs to be created.
-@@ -152,10 +156,13 @@ $(ARCH_SRC):
- $(COMMON_SRC):
- $(MKDIR_P) $@
-
-+$(LIBFDT_SRC):
-+ $(MKDIR_P) $@
-+
- %.o: %.S Makefile | $(ARCH_SRC)
- $(CC) $(CPPFLAGS) -D__ASSEMBLY__ $(CFLAGS) $(DEFINES) -c -o $@ $<
-
--%.o: %.c Makefile | $(COMMON_SRC)
-+%.o: %.c Makefile | $(COMMON_SRC) $(LIBFDT_SRC)
- $(CC) $(CPPFLAGS) $(CFLAGS) $(DEFINES) -c -o $@ $<
-
- model.lds: $(LD_SCRIPT) Makefile
deleted file mode 100644
@@ -1,67 +0,0 @@
-From f0ece5e8cac761a76a86df7204bae7c6ef09215f Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Wed, 29 Dec 2021 10:50:21 +0800
-Subject: [PATCH] platform: Add print_hex func
-
-Refine the print functions, and add a new print_hex func to print hex
-numbers.
-
-Issue-Id: SCM-3814
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: Ic960345d9ef0b41d81d30c4a4dbd9c31139907c4
----
- common/platform.c | 33 +++++++++++++++++++++++++--------
- 1 file changed, 25 insertions(+), 8 deletions(-)
-
-diff --git a/common/platform.c b/common/platform.c
-index d11f568..8269392 100644
---- a/common/platform.c
-+++ b/common/platform.c
-@@ -30,20 +30,37 @@
- #define V2M_SYS(reg) ((void *)SYSREGS_BASE + V2M_SYS_##reg)
- #endif
-
--static void print_string(const char *str)
-+static void print_char(const char c)
- {
- uint32_t flags;
-+ do {
-+ flags = raw_readl(PL011(UARTFR));
-+ } while (flags & PL011_UARTFR_FIFO_FULL);
-
-+ raw_writel(c, PL011(UARTDR));
-+
-+ do {
-+ flags = raw_readl(PL011(UARTFR));
-+ } while (flags & PL011_UARTFR_BUSY);
-+}
-+
-+void print_string(const char *str)
-+{
- while (*str) {
-- do
-- flags = raw_readl(PL011(UARTFR));
-- while (flags & PL011_UARTFR_FIFO_FULL);
-+ print_char(*str++);
-+ }
-+}
-
-- raw_writel(*str++, PL011(UARTDR));
-+#define HEX_CHARS_PER_INT (2 * sizeof(int))
-+
-+void print_hex(unsigned int val)
-+{
-
-- do
-- flags = raw_readl(PL011(UARTFR));
-- while (flags & PL011_UARTFR_BUSY);
-+ const char hex_chars[16] = "0123456789abcdef";
-+ int i;
-+ for (i = HEX_CHARS_PER_INT - 1; i >= 0; i--) {
-+ int v = (val >> (4 * i)) & 0xf;
-+ print_char(hex_chars[v]);
- }
- }
-
deleted file mode 100644
@@ -1,96 +0,0 @@
-From f4704146e1af9f6e0a2220db6b39a328c813fac1 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Wed, 19 Jan 2022 16:19:02 +0800
-Subject: [PATCH] common: Add mem usage to /memreserve/
-
-Set /memreserve/ to prevent next boot stages from overrding PSCI
-services with libfdt.
-
-Issue-Id: SCM-3815
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: I2ea80cdf736a910fa2c3deb622e21d50f04be960
----
- Makefile.am | 2 +-
- common/boot.c | 1 +
- common/device_tree.c | 34 ++++++++++++++++++++++++++++++++++
- include/boot.h | 1 +
- 4 files changed, 37 insertions(+), 1 deletion(-)
- create mode 100644 common/device_tree.c
-
-diff --git a/Makefile.am b/Makefile.am
-index ab2c3a9..e905602 100644
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -34,7 +34,7 @@ endif
- PSCI_CPU_OFF := 0x84000002
-
- COMMON_SRC := common/
--COMMON_OBJ := boot.o bakery_lock.o platform.o lib.o
-+COMMON_OBJ := boot.o bakery_lock.o platform.o lib.o device_tree.o
-
- LIBFDT_SRC := common/libfdt/
- LIBFDT_OBJS := fdt.o fdt_ro.o fdt_rw.o
-diff --git a/common/boot.c b/common/boot.c
-index c74d34c..ee2bea0 100644
---- a/common/boot.c
-+++ b/common/boot.c
-@@ -63,6 +63,7 @@ void __noreturn first_spin(unsigned int cpu, unsigned long *mbox,
- {
- if (cpu == 0) {
- init_platform();
-+ dt_add_memreserve();
-
- *mbox = (unsigned long)&entrypoint;
- sevl();
-diff --git a/common/device_tree.c b/common/device_tree.c
-new file mode 100644
-index 0000000..4d0876c
---- /dev/null
-+++ b/common/device_tree.c
-@@ -0,0 +1,34 @@
-+/*
-+ * device_tree.c - Basic device tree node handler
-+ *
-+ * Copyright (C) 2021 ARM Limited. All rights reserved.
-+ *
-+ * Use of this source code is governed by a BSD-style license that can be
-+ * found in the LICENSE.txt file.
-+ */
-+#include <libfdt.h>
-+
-+extern unsigned long dtb;
-+extern char firmware_start[], firmware_end[];
-+
-+extern void print_string(const char *str);
-+
-+static void *blob;
-+
-+
-+void dt_add_memreserve(void)
-+{
-+ int ret;
-+
-+ blob = (void*)&dtb;
-+ print_string("Add /memreserve/\n\r");
-+
-+ fdt_open_into(blob, blob, fdt_totalsize(blob) +
-+ sizeof(struct fdt_reserve_entry));
-+ ret = fdt_add_mem_rsv(blob, (uint64_t)firmware_start,
-+ (uint64_t)(firmware_end - firmware_start));
-+
-+ if(ret < 0) {
-+ print_string("reserve mem add err\n\r");
-+ }
-+}
-diff --git a/include/boot.h b/include/boot.h
-index d75e013..c3e2ec1 100644
---- a/include/boot.h
-+++ b/include/boot.h
-@@ -16,4 +16,5 @@ void __noreturn spin(unsigned long *mbox, unsigned long invalid, int is_entry);
- void __noreturn first_spin(unsigned int cpu, unsigned long *mbox,
- unsigned long invalid_addr);
-
-+void dt_add_memreserve(void);
- #endif
deleted file mode 100644
@@ -1,102 +0,0 @@
-From 5995f83592aea874f5b423538e36675e2204582b Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 4 Jan 2022 17:01:55 +0800
-Subject: [PATCH] boot: Add the --enable-keep-el compile option
-
-Add --enable-keep-el compile option to enable boot-wrapper booting next
-stage at EL2.
-The Armv8R AArch64 boots at EL2. If the next stage requires EL2 booting,
-the boot-wrapper should not drop to EL1.
-Currently, this option only works for Armv8R AArch64. Also, to work with
-Linux PSCI, this option will cause secondary cores booting at EL1.
-
-Issue-Id: SCM-3813
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: I3ba9c87cf0b59d163ca433f74c9e3a46e5ca2c63
----
- Makefile.am | 4 ++++
- arch/aarch64/boot.S | 6 +++++-
- common/psci.c | 6 ++++++
- configure.ac | 5 +++++
- 4 files changed, 20 insertions(+), 1 deletion(-)
-
-diff --git a/Makefile.am b/Makefile.am
-index e905602..6604baa 100644
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -33,6 +33,10 @@ PSCI_CPU_ON := 0xc4000003
- endif
- PSCI_CPU_OFF := 0x84000002
-
-+if KEEP_EL
-+DEFINES += -DKEEP_EL
-+endif
-+
- COMMON_SRC := common/
- COMMON_OBJ := boot.o bakery_lock.o platform.o lib.o device_tree.o
-
-diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
-index 27b1139..c079d22 100644
---- a/arch/aarch64/boot.S
-+++ b/arch/aarch64/boot.S
-@@ -254,7 +254,11 @@ el2_init:
- msr cnthctl_el2, x0
- isb
-
-+#ifdef KEEP_EL
-+ mov w0, #SPSR_KERNEL
-+#else
- mov w0, #SPSR_KERNEL_EL1
-+#endif
- ldr x1, =spsr_to_elx
- str w0, [x1]
- // fall through
-@@ -334,5 +338,5 @@ ASM_FUNC(jump_kernel)
- .align 3
- flag_keep_el:
- .long 0
--spsr_to_elx:
-+ASM_DATA(spsr_to_elx)
- .long 0
-diff --git a/common/psci.c b/common/psci.c
-index a0e8700..945780b 100644
---- a/common/psci.c
-+++ b/common/psci.c
-@@ -18,6 +18,8 @@
- #error "No MPIDRs provided"
- #endif
-
-+extern unsigned int spsr_to_elx;
-+
- static unsigned long branch_table[NR_CPUS];
-
- bakery_ticket_t branch_table_lock[NR_CPUS];
-@@ -44,6 +46,10 @@ static int psci_cpu_on(unsigned long target_mpidr, unsigned long address)
- ret = psci_store_address(cpu, address);
- bakery_unlock(branch_table_lock, this_cpu);
-
-+#ifdef KEEP_EL
-+ spsr_to_elx = SPSR_KERNEL_EL1;
-+#endif
-+
- return ret;
- }
-
-diff --git a/configure.ac b/configure.ac
-index 53e51be..0e07db3 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -25,6 +25,11 @@ AS_IF([test "x$BOOTWRAPPER_ES" = x32 -a "x$KERNEL_ES" != x32],
- [AC_MSG_ERROR([a 32-bit boot-wrapper cannot launch a 64-bit kernel])]
- )
-
-+AC_ARG_ENABLE([keep-el],
-+ AC_HELP_STRING([--enable-keep-el], [keep exception level when start kernel]),
-+ [KEEP_EL=yes], [KEEP_EL=no])
-+AM_CONDITIONAL([KEEP_EL], [test "x$KEEP_EL" = xyes])
-+
- # Allow a user to pass --with-kernel-dir
- AC_ARG_WITH([kernel-dir],
- AS_HELP_STRING([--with-kernel-dir], [specify the root Linux kernel build directory (required)]),
deleted file mode 100644
@@ -1,31 +0,0 @@
-From 0c0695cd3160ccdb95bae29b7668918015c0b6aa Mon Sep 17 00:00:00 2001
-From: Peter Hoyes <Peter.Hoyes@arm.com>
-Date: Tue, 1 Feb 2022 11:28:46 +0000
-Subject: [PATCH] Makefile: Change COUNTER_FREQ to 100 MHz
-
-Older Arm Fast Models (AEM < RevC) had a base frequency of 24 MHz. but
-the RevC base models use 100 MHz. There is not a robust method of
-determining the configured base frequency at runtime, so update
-COUNTER_FREQ to be 100 MHz.
-
-Issue-Id: SCM-3871
-Upstream-Status: Pending
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Change-Id: Ia9ad0f8ee488d1a887791f1fa1d8f3bf9c5887fd
----
- Makefile.am | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/Makefile.am b/Makefile.am
-index 6604baa..cc6504e 100644
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -13,7 +13,7 @@ SCRIPT_DIR := $(top_srcdir)/scripts
- PHYS_OFFSET := $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/findmem.pl $(KERNEL_DTB))
- UART_BASE := $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/findbase.pl $(KERNEL_DTB) 0 'arm,pl011')
- SYSREGS_BASE := $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/findbase.pl $(KERNEL_DTB) 0 'arm,vexpress-sysreg' 2> /dev/null)
--COUNTER_FREQ := 24000000
-+COUNTER_FREQ := 100000000
-
- CPU_IDS := $(shell perl -I $(SCRIPT_DIR) $(SCRIPT_DIR)/findcpuids.pl $(KERNEL_DTB))
- NR_CPUS := $(shell echo $(CPU_IDS) | tr ',' ' ' | wc -w)
deleted file mode 100644
@@ -1,49 +0,0 @@
-From fa73d885be85eee4369b292ec601e7b024a68807 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 2 Nov 2021 10:48:39 +0800
-Subject: [PATCH] PSCI: Apply flush cache after setting branch_data
-
-For v8-R64, Hypervisor calls boot-wrapper's PSCI service using simple
-function call (instead of hvc).
-
-In this case, hypervisor's main core has enabled MPU and cache, but
-the secondary cores which are spinning have not enabled cache.
-That means if the main core set the branch_data to 1 to boot other
-cores, the secondary cores cannot see the change of branch_data and
-also cannot break the spin.
-
-Thus, the PSCI service in boot-wrapper needs a cache flush after
-setting branch_data in order to let other cores see the change.
-
-Issue-ID: SCM-3816
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: Ifc282091c54d8fb2ffdb8cfa7fd3ffc1f4be717e
----
- common/psci.c | 6 ++++++
- 1 file changed, 6 insertions(+)
-
-diff --git a/common/psci.c b/common/psci.c
-index 945780b..6efc695 100644
---- a/common/psci.c
-+++ b/common/psci.c
-@@ -24,12 +24,18 @@ static unsigned long branch_table[NR_CPUS];
-
- bakery_ticket_t branch_table_lock[NR_CPUS];
-
-+static inline void flush_per_cpu_data(void *data)
-+{
-+ asm volatile ("dc cvac, %0" : : "r" (data));
-+}
-+
- static int psci_store_address(unsigned int cpu, unsigned long address)
- {
- if (branch_table[cpu] != PSCI_ADDR_INVALID)
- return PSCI_RET_ALREADY_ON;
-
- branch_table[cpu] = address;
-+ flush_per_cpu_data((void*)&(branch_table[cpu]));
- return PSCI_RET_SUCCESS;
- }
-
deleted file mode 100644
@@ -1,71 +0,0 @@
-From 9da48e3433b919868650cd60e28827273a42c63b Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 25 Jan 2022 14:56:36 +0800
-Subject: [PATCH] PSCI: Add function call entry point
-
-The max exception level of Armv8R AArch64 is EL2, which means it has no
-exclusive EL for firmware. That is, firmware and hypervisors have to share
-the EL2. Also, hypervisors cannot call firmware services via a 'smc'
-instruction. Thus, boot-wrapper has to provide a function entry point
-for Armv8R AArch64.
-
-Issue-Id: SCM-3816
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: I06ec8e50298603155c6d8ae2330e71db2f111182
----
- common/psci.c | 24 ++++++++++++++++++++----
- 1 file changed, 20 insertions(+), 4 deletions(-)
-
-diff --git a/common/psci.c b/common/psci.c
-index 6efc695..8fdefb5 100644
---- a/common/psci.c
-+++ b/common/psci.c
-@@ -20,6 +20,8 @@
-
- extern unsigned int spsr_to_elx;
-
-+unsigned long flag_from_smc_fn[NR_CPUS];
-+
- static unsigned long branch_table[NR_CPUS];
-
- bakery_ticket_t branch_table_lock[NR_CPUS];
-@@ -49,12 +51,14 @@ static int psci_cpu_on(unsigned long target_mpidr, unsigned long address)
- return PSCI_RET_INVALID_PARAMETERS;
-
- bakery_lock(branch_table_lock, this_cpu);
-- ret = psci_store_address(cpu, address);
-- bakery_unlock(branch_table_lock, this_cpu);
--
- #ifdef KEEP_EL
-- spsr_to_elx = SPSR_KERNEL_EL1;
-+ if (!flag_from_smc_fn[this_cpu]) {
-+ spsr_to_elx = SPSR_KERNEL_EL1;
-+ flush_per_cpu_data((void*)&(spsr_to_elx));
-+ }
- #endif
-+ ret = psci_store_address(cpu, address);
-+ bakery_unlock(branch_table_lock, this_cpu);
-
- return ret;
- }
-@@ -90,6 +94,18 @@ long psci_call(unsigned long fid, unsigned long arg1, unsigned long arg2)
- }
- }
-
-+long smc_fn_entry(unsigned long fid, unsigned long arg1, unsigned long arg2)
-+{
-+ long ret;
-+ unsigned int this_cpu = this_cpu_logical_id();
-+
-+ flag_from_smc_fn[this_cpu] = 1;
-+ ret = psci_call(fid, arg1, arg2);
-+ flag_from_smc_fn[this_cpu] = 0;
-+
-+ return ret;
-+}
-+
- void __noreturn psci_first_spin(unsigned int cpu)
- {
- if (cpu == MPIDR_INVALID)
deleted file mode 100644
@@ -1,58 +0,0 @@
-From 7c5e40d9f8699a55ac2187c035429c643e6d0ef0 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Tue, 2 Nov 2021 15:10:28 +0800
-Subject: [PATCH] lds: Rearrange and mark the sections
-
-To make it possible for the next stage to protect sections with MPU,
-boot-wrapper needs to provide the text and data section information.
-By rearranging the .data .rodata and .vector sections, all sections
-can be split into 2 big sections:
- - RO and Executable
- - RW and Non-Executable
-Add firmware_data to mark the boundry, thus:
-firmware_start to firmware_data - 1 indicates RO and Executable section,
-firmware_data to firmware_end - 1 indicates RW and Non-Executable
-section.
-
-Also, the firmware_data and firmware_end should align with 64 bytes,
-since Armv8R AArch64 MPU requires it.
-
-Issue-ID: SCM-3816
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: I55342aa7492f2c7b5c16ab9a6472c8cb45cff8fd
----
- model.lds.S | 7 ++++++-
- 1 file changed, 6 insertions(+), 1 deletion(-)
-
-diff --git a/model.lds.S b/model.lds.S
-index ab98ddf..85451f9 100644
---- a/model.lds.S
-+++ b/model.lds.S
-@@ -63,12 +63,16 @@ SECTIONS
- }
- #endif
-
-+#define FIRMWARE_ALIGN . = ALIGN(1 << 6)
- .boot PHYS_OFFSET: {
- PROVIDE(firmware_start = .);
- *(.init)
- *(.text*)
-- *(.data* .rodata* .bss* COMMON)
- *(.vectors)
-+ *(.rodata*)
-+ FIRMWARE_ALIGN;
-+ PROVIDE(firmware_data = .);
-+ *(.data* .bss* COMMON)
- *(.stack)
- PROVIDE(etext = .);
- }
-@@ -77,6 +81,7 @@ SECTIONS
- mbox = .;
- QUAD(0x0)
- }
-+ FIRMWARE_ALIGN;
- PROVIDE(firmware_end = .);
-
- ASSERT(etext <= (PHYS_OFFSET + TEXT_LIMIT), ".text overflow!")
deleted file mode 100644
@@ -1,342 +0,0 @@
-From 3c1140c29c39561848056fb4b9a03042b00279f3 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Wed, 29 Dec 2021 15:17:38 +0800
-Subject: [PATCH] common: Provide firmware info using libfdt
-
-Boot-wrapper uses libfdt to provide more info in device tree.
-We add a new node to include those new firmware relevant infomation.
-The new node defined as follows:
- fw-shared-info {
- compatible = "firmware,shared_info";
-
- #address-cells = <0x02>;
- #size-cells = <0x02>;
-
- version = "1.0";
- regions = <START_ADDR_HIGH START_ADDR_LOW SIZE_HIGH SIZE_LOW
- 0x0 0x80000000 0x0 0x400000
- 0x0 0x90000000 0x0 0x400000
- 0x0 0xA0000000 0x0 0x400000>;
- regions-permission = "RX", "R", "RWX", "RW";
- regions-cache = "Cache", "NCache", "Cache", "Device"
-
- function_entry = <ENTRY_ADDR_HIGH ENRTY_ADDR_LOW>;
- };
-The node path is /fw-shared-info.
-For boot-wrapper, in real case, it will be:
- fw-shared-info {
- compatible = "firmware,shared_info";
-
- #address-cells = <0x02>;
- #size-cells = <0x02>;
-
- version = "1.0";
- regions = <0x0 firmware_start 0x0 firmware_code_size
- 0x0 firmware_data 0x0 firmware_data_size>;
- regions-permission = "RX", "RW";
- regions-cache = "Cache", "Cache";
-
- function_entry = <0x0 smc_fn_entry>;
- };
-
-Issue-Id: SCM-3816
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: I6ebc59ce2bd3939b0fe066720d57821eaa1bed27
----
- common/device_tree.c | 271 ++++++++++++++++++++++++++++++++++++++++++-
- 1 file changed, 270 insertions(+), 1 deletion(-)
-
-diff --git a/common/device_tree.c b/common/device_tree.c
-index 4d0876c..7f7befc 100644
---- a/common/device_tree.c
-+++ b/common/device_tree.c
-@@ -8,13 +8,225 @@
- */
- #include <libfdt.h>
-
-+#define DEVICE_TREE_DEBUG 1
-+
-+#define FW_NODE_NAME "/fw-shared-info"
-+#define FW_COMPAT "firmware,shared_info"
-+#define FW_INFO_VER "1.0"
-+
-+#ifdef BOOTWRAPPER_32
-+#define CELL_NUM 1
-+#define VAL_TYPE uint32_t
-+#else
-+#define CELL_NUM 2
-+#define VAL_TYPE uint64_t
-+#endif
-+
-+#define ALIGN(x) (((x) + (FDT_TAGSIZE) - 1) & ~((FDT_TAGSIZE) - 1))
-+
- extern unsigned long dtb;
--extern char firmware_start[], firmware_end[];
-+extern char firmware_start[], firmware_data[], firmware_end[];
-+
-+extern long smc_fn_entry(unsigned long, unsigned long, unsigned long);
-
- extern void print_string(const char *str);
-+extern void print_hex(unsigned int val);
-
- static void *blob;
-
-+static char *realloc_node(char *fdt, const char *name)
-+{
-+ int delta;
-+ int new_sz;
-+ /* FDT_BEGIN_NODE, node name in off_struct and FDT_END_NODE */
-+ delta = sizeof(struct fdt_node_header) + ALIGN(strlen(name) + 1)
-+ + FDT_TAGSIZE;
-+ new_sz = fdt_totalsize(fdt) + delta;
-+ fdt_open_into(fdt, fdt, new_sz);
-+ return fdt;
-+}
-+
-+static int create_node(const char *node_name)
-+{
-+ int node = 0;
-+ char *p;
-+
-+ p = strrchr(node_name, '/');
-+ if (!p) {
-+ print_string("node name without '/'\r\n");
-+ return -1;
-+ }
-+ *p = '\0';
-+
-+ blob = realloc_node(blob, p + 1);
-+
-+ if (p > node_name) {
-+ node = fdt_path_offset(blob, node_name);
-+ if (node < 0) {
-+ print_string("no node name\r\n");
-+ return -1;
-+ }
-+ }
-+
-+ node = fdt_add_subnode(blob, node, p + 1);
-+ if (node < 0) {
-+ print_string("add subnode err\r\n");
-+ return -1;
-+ }
-+
-+ return node;
-+}
-+
-+static int dt_create_fw_node(void) {
-+ int fw_node;
-+
-+ fw_node = fdt_path_offset(blob, FW_NODE_NAME);
-+
-+ if(fw_node < 0) {
-+ fw_node = create_node(FW_NODE_NAME);
-+ }
-+
-+ return fw_node;
-+}
-+
-+static char *realloc_property(char *fdt, int nodeoffset, const char *name,
-+ int newlen)
-+{
-+ int delta = 0;
-+ int oldlen = 0;
-+ int new_sz;
-+
-+ if (!fdt_get_property(fdt, nodeoffset, name, &oldlen))
-+ delta = sizeof(struct fdt_property) + strlen(name) + 1;
-+
-+ if (newlen > oldlen)
-+ delta += ALIGN(newlen) - ALIGN(oldlen);
-+
-+ new_sz = fdt_totalsize(fdt) + delta;
-+ fdt_open_into(fdt, fdt, new_sz);
-+ return fdt;
-+}
-+
-+static void dt_set_prop(int node, char *property, void *buf, int len)
-+{
-+ int err;
-+
-+ err = fdt_setprop(blob, node, property, buf, len);
-+ if (err == -FDT_ERR_NOSPACE) {
-+ blob = realloc_property(blob, node, property, len);
-+ err = fdt_setprop(blob, node, property, buf, len);
-+ }
-+ if (err) {
-+ print_string("fdt error\n\r");
-+ }
-+}
-+
-+static void dt_set_prop_u32(int node, char *property, uint32_t val)
-+{
-+ fdt32_t fdt_val = cpu_to_fdt32(val);
-+ int len = sizeof(fdt32_t);
-+
-+ dt_set_prop(node, property, (void*)&fdt_val, len);
-+}
-+
-+static void dt_set_prop_u64(int node, char *property, uint64_t val)
-+{
-+ fdt64_t fdt_val = cpu_to_fdt64(val);
-+ int len = sizeof(fdt64_t);
-+
-+ dt_set_prop(node, property, (void*)&fdt_val, len);
-+}
-+
-+/* This dt_set_prop_u32_array maybe unused according to the BOOTWRAPPER_32 */
-+__attribute__((unused))
-+static void dt_set_prop_u32_array(int node, char *property, uint32_t *vals,
-+ int size)
-+{
-+ fdt32_t *fdt_vals = (fdt32_t*)vals;
-+ int len = sizeof(fdt32_t) * size;
-+
-+ for (int i = 0; i < size; i++) {
-+ fdt_vals[i] = cpu_to_fdt32(vals[i]);
-+ }
-+
-+ dt_set_prop(node, property, (void*)fdt_vals, len);
-+}
-+
-+static void dt_set_prop_u64_array(int node, char *property, uint64_t *vals,
-+ int size)
-+{
-+ fdt64_t *fdt_vals = (fdt64_t*)vals;
-+ int len = sizeof(fdt64_t) * size;
-+
-+ for (int i = 0; i < size; i++) {
-+ fdt_vals[i] = cpu_to_fdt64(vals[i]);
-+ }
-+
-+ dt_set_prop(node, property, (void*)fdt_vals, len);
-+}
-+
-+#if DEVICE_TREE_DEBUG
-+static void dt_dump_string(const void *s, int len)
-+{
-+ char *sub = (char*)s;
-+ int sublen;
-+ while(*sub && ((uint64_t)sub - (uint64_t)s) < len) {
-+ sublen = strlen(sub) + 1;
-+ print_string(sub);
-+ print_string(" ");
-+ sub += sublen;
-+ }
-+ print_string("\n\r");
-+}
-+
-+static void dt_dump_fdt32_array(const void *vals, int len)
-+{
-+ fdt32_t *fdt_vals = (fdt32_t*)vals;
-+ len = len / sizeof(fdt32_t);
-+ for (int i = 0; i < len; i++) {
-+ print_hex(fdt32_to_cpu(fdt_vals[i]));
-+ print_string(" ");
-+ }
-+ print_string("\n\r");
-+}
-+
-+static void dt_dump(int node, char *property, char type)
-+{
-+ const void *val;
-+ int len;
-+
-+ val = fdt_getprop(blob, node, property, &len);
-+ print_string(property);
-+ print_string(": ");
-+
-+ if (type == 's') {
-+ /* string type */
-+ dt_dump_string(val, len);
-+ return;
-+ }
-+
-+ /* uint type */
-+ dt_dump_fdt32_array(val, len);
-+}
-+
-+void dt_dump_all(int node)
-+{
-+ if (node >= 0) {
-+ print_string(FW_NODE_NAME" info:\r\n");
-+ dt_dump(node, "compatible", 's');
-+ dt_dump(node, "version", 's');
-+ dt_dump(node, "function_entry", 'i');
-+ dt_dump(node, "address-cells", 'i');
-+ dt_dump(node, "size-cells", 'i');
-+ dt_dump(node, "regions", 'i');
-+ dt_dump(node, "regions-permission", 's');
-+ dt_dump(node, "regions-cache", 's');
-+ print_string("\r\n");
-+ }
-+}
-+#else
-+void dt_dump_all(int node) { (void*)node; return; }
-+#endif
-
- void dt_add_memreserve(void)
- {
-@@ -32,3 +244,60 @@ void dt_add_memreserve(void)
- print_string("reserve mem add err\n\r");
- }
- }
-+
-+void dt_fw_node_init(int enable)
-+{
-+ int fw_node;
-+
-+ VAL_TYPE regions[] = {
-+ /* code region: start, end, ro, x, cachable */
-+ (VAL_TYPE)firmware_start,
-+ (VAL_TYPE)(firmware_data - firmware_start),
-+ /* data region: start, end, rw, xn, cachable */
-+ (VAL_TYPE)firmware_data,
-+ (VAL_TYPE)(firmware_end - firmware_data),
-+ };
-+ int regions_num = sizeof(regions) / sizeof(VAL_TYPE);
-+ char regions_permission[] = "RX\0RW";
-+ char regions_cache[] = "Cache\0Cache";
-+
-+ if (!enable)
-+ return;
-+
-+ print_string("Prepare "FW_NODE_NAME" node\n\r");
-+
-+ blob = (void*)&dtb;
-+
-+ if(fdt_path_offset(blob, "/psci") < 0) {
-+ print_string("/psci node not found\n\r");
-+ return;
-+ }
-+
-+ fw_node = dt_create_fw_node();
-+
-+ if(fw_node < 0) {
-+ print_string(FW_NODE_NAME" node create err\n\r");
-+ }
-+
-+ dt_set_prop(fw_node, "compatible", FW_COMPAT, sizeof(FW_COMPAT));
-+ dt_set_prop(fw_node, "version", FW_INFO_VER, sizeof(FW_INFO_VER));
-+
-+ dt_set_prop_u32(fw_node, "address-cells", CELL_NUM);
-+ dt_set_prop_u32(fw_node, "size-cells", CELL_NUM);
-+ dt_set_prop(fw_node, "regions-permission", regions_permission,
-+ sizeof(regions_permission));
-+ dt_set_prop(fw_node, "regions-cache", regions_cache,
-+ sizeof(regions_cache));
-+
-+#ifdef BOOTWRAPPER_32
-+ dt_set_prop_u32_array(fw_node, "regions", regions, regions_num);
-+ dt_set_prop_u32(fw_node, "function_entry", (VAL_TYPE)smc_fn_entry);
-+#else
-+ dt_set_prop_u64_array(fw_node, "regions", regions, regions_num);
-+ dt_set_prop_u64(fw_node, "function_entry", (VAL_TYPE)smc_fn_entry);
-+#endif
-+
-+ fdt_pack(blob);
-+
-+ dt_dump_all(fw_node);
-+}
deleted file mode 100644
@@ -1,95 +0,0 @@
-From b1105e862e8f770fc195bc20e9c64d231dd32f66 Mon Sep 17 00:00:00 2001
-From: Jaxson Han <jaxson.han@arm.com>
-Date: Wed, 29 Dec 2021 15:33:17 +0800
-Subject: [PATCH] boot: Enable firmware node initialization
-
-Enable the firmware node initialization, so that the next stage
-(hypervisor) could share the EL2 with firmware (boot-wrapper). The next
-stage (hypervisor) get the smccc entry point, code/data sections, the
-sections attrs and firmware node version and so on.
-It is worth noting that this EL2 sharing mechanism is only for Armv8R
-AArch64, thus add flag_v8r to record if the arch is Armv8R AArch64.
-Enable the firmware node initialization only if it is Armv8R AArch64.
-Also, we increase the stack size to 1024 to fix the stack overflow issue
-when using the libfdt.
-
-Add -fno-builtin options to CFLAGS to avoid the issue that the 'memset'
-in common/lib.c conflicts with builtin 'memset' function. GCC version
->= 10 will have an incorrect compilation without -fno-builtin;
-
-Issue-Id: SCM-3816
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Jaxson Han <jaxson.han@arm.com>
-Change-Id: Ib274485a34d26215595fd0cd737be86610289817
----
- Makefile.am | 4 ++--
- arch/aarch64/boot.S | 6 ++++++
- common/boot.c | 4 ++++
- 3 files changed, 12 insertions(+), 2 deletions(-)
-
-diff --git a/Makefile.am b/Makefile.am
-index cc6504e..fbe6b81 100644
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -23,7 +23,7 @@ DEFINES += -DCPU_IDS=$(CPU_IDS)
- DEFINES += -DNR_CPUS=$(NR_CPUS)
- DEFINES += $(if $(SYSREGS_BASE), -DSYSREGS_BASE=$(SYSREGS_BASE), )
- DEFINES += -DUART_BASE=$(UART_BASE)
--DEFINES += -DSTACK_SIZE=256
-+DEFINES += -DSTACK_SIZE=1024
-
- if KERNEL_32
- DEFINES += -DKERNEL_32
-@@ -134,7 +134,7 @@ CFLAGS += -I$(top_srcdir)/include/ -I$(top_srcdir)/$(ARCH_SRC)/include/
- CFLAGS += -Wall -fomit-frame-pointer
- CFLAGS += -ffreestanding -nostdlib
- CFLAGS += -fno-stack-protector
--CFLAGS += -fno-stack-protector
-+CFLAGS += -fno-stack-protector -fno-builtin
- CFLAGS += -ffunction-sections -fdata-sections
- CFLAGS += -fno-pic -fno-pie
- LDFLAGS += --gc-sections
-diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
-index c079d22..daaa674 100644
---- a/arch/aarch64/boot.S
-+++ b/arch/aarch64/boot.S
-@@ -261,6 +261,10 @@ el2_init:
- #endif
- ldr x1, =spsr_to_elx
- str w0, [x1]
-+
-+ mov w0, #1
-+ ldr x1, =flag_v8r
-+ str w0, [x1]
- // fall through
-
- el_max_init:
-@@ -340,3 +344,5 @@ flag_keep_el:
- .long 0
- ASM_DATA(spsr_to_elx)
- .long 0
-+ASM_DATA(flag_v8r)
-+ .long 0
-diff --git a/common/boot.c b/common/boot.c
-index ee2bea0..38b2dca 100644
---- a/common/boot.c
-+++ b/common/boot.c
-@@ -11,6 +11,9 @@
-
- extern unsigned long entrypoint;
- extern unsigned long dtb;
-+extern unsigned int flag_v8r;
-+
-+extern void dt_fw_node_init(int enable);
-
- void init_platform(void);
-
-@@ -64,6 +67,7 @@ void __noreturn first_spin(unsigned int cpu, unsigned long *mbox,
- if (cpu == 0) {
- init_platform();
- dt_add_memreserve();
-+ dt_fw_node_init(flag_v8r == 1);
-
- *mbox = (unsigned long)&entrypoint;
- sevl();
deleted file mode 100644
@@ -1,257 +0,0 @@
-From 401a88bf6019941d4095476de76af5893686d6f6 Mon Sep 17 00:00:00 2001
-From: Peter Hoyes <Peter.Hoyes@arm.com>
-Date: Wed, 26 May 2021 17:41:10 +0100
-Subject: [PATCH] armv8: Add ARMv8 MPU configuration logic
-
-Detect whether an MMU is present at the current exception level. If
-not, initialize the MPU instead of the MMU during init, and clear the
-MPU regions before transition to Linux.
-
-The MSA in use at EL1&0 may be configurable but can only by determined
-by inspecting VTCR_EL2 at EL2, so assume that there is an MMU for
-backwards compatibility.
-
-Provide a default (blank) MPU memory map, which can be overridden by
-board configurations.
-
-Issue-Id: SCM-2443
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Change-Id: I0ee3879f9d7f03fe940664b3551c68eeaa458d17
-
----
- arch/arm/cpu/armv8/cache_v8.c | 101 ++++++++++++++++++++++++++++++-
- arch/arm/include/asm/armv8/mpu.h | 59 ++++++++++++++++++
- arch/arm/include/asm/system.h | 19 ++++++
- 3 files changed, 176 insertions(+), 3 deletions(-)
- create mode 100644 arch/arm/include/asm/armv8/mpu.h
-
-diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c
-index 2a226fd063..8611a35eb3 100644
---- a/arch/arm/cpu/armv8/cache_v8.c
-+++ b/arch/arm/cpu/armv8/cache_v8.c
-@@ -15,6 +15,7 @@
- #include <asm/global_data.h>
- #include <asm/system.h>
- #include <asm/armv8/mmu.h>
-+#include <asm/armv8/mpu.h>
-
- DECLARE_GLOBAL_DATA_PTR;
-
-@@ -385,6 +386,91 @@ __weak u64 get_page_table_size(void)
- return size;
- }
-
-+static void mpu_clear_regions(void)
-+{
-+ int i;
-+
-+ for (i = 0; mpu_mem_map[i].end || mpu_mem_map[i].attrs; i++) {
-+ setup_el2_mpu_region(i, 0, 0);
-+ }
-+}
-+
-+static struct mpu_region default_mpu_mem_map[] = {{0,}};
-+__weak struct mpu_region *mpu_mem_map = default_mpu_mem_map;
-+
-+static void mpu_setup(void)
-+{
-+ int i;
-+
-+ if (current_el() != 2) {
-+ panic("MPU configuration is only supported at EL2");
-+ }
-+
-+ set_sctlr(get_sctlr() & ~(CR_M | CR_WXN));
-+
-+ asm volatile("msr MAIR_EL2, %0" : : "r" MEMORY_ATTRIBUTES);
-+
-+ for (i = 0; mpu_mem_map[i].end || mpu_mem_map[i].attrs; i++) {
-+ setup_el2_mpu_region(i,
-+ PRBAR_ADDRESS(mpu_mem_map[i].start)
-+ | PRBAR_OUTER_SH | PRBAR_AP_RW_ANY,
-+ PRLAR_ADDRESS(mpu_mem_map[i].end)
-+ | mpu_mem_map[i].attrs | PRLAR_EN_BIT
-+ );
-+ }
-+
-+ set_sctlr(get_sctlr() | CR_M);
-+}
-+
-+static bool el_has_mmu(void)
-+{
-+ if (current_el() < 2) {
-+ // We have no way of knowing, so assuming we have an MMU
-+ return true;
-+ }
-+
-+ uint64_t id_aa64mmfr0;
-+ asm volatile("mrs %0, id_aa64mmfr0_el1"
-+ : "=r" (id_aa64mmfr0) : : "cc");
-+ uint64_t msa = id_aa64mmfr0 & ID_AA64MMFR0_EL1_MSA_MASK;
-+ uint64_t msa_frac = id_aa64mmfr0 & ID_AA64MMFR0_EL1_MSA_FRAC_MASK;
-+
-+ switch (msa) {
-+ case ID_AA64MMFR0_EL1_MSA_VMSA:
-+ /*
-+ * VMSA supported in all translation regimes.
-+ * No support for PMSA.
-+ */
-+ return true;
-+ case ID_AA64MMFR0_EL1_MSA_USE_FRAC:
-+ /* See MSA_frac for the supported MSAs. */
-+ switch (msa_frac) {
-+ case ID_AA64MMFR0_EL1_MSA_FRAC_NO_PMSA:
-+ /*
-+ * PMSA not supported in any translation
-+ * regime.
-+ */
-+ return true;
-+ case ID_AA64MMFR0_EL1_MSA_FRAC_VMSA:
-+ /*
-+ * PMSA supported in all translation
-+ * regimes. No support for VMSA.
-+ */
-+ case ID_AA64MMFR0_EL1_MSA_FRAC_PMSA:
-+ /*
-+ * PMSA supported in all translation
-+ * regimes.
-+ */
-+ return false;
-+ default:
-+ panic("Unsupported id_aa64mmfr0_el1 " \
-+ "MSA_frac value");
-+ }
-+ default:
-+ panic("Unsupported id_aa64mmfr0_el1 MSA value");
-+ }
-+}
-+
- void setup_pgtables(void)
- {
- int i;
-@@ -499,8 +585,13 @@ void dcache_enable(void)
- /* The data cache is not active unless the mmu is enabled */
- if (!(get_sctlr() & CR_M)) {
- invalidate_dcache_all();
-- __asm_invalidate_tlb_all();
-- mmu_setup();
-+
-+ if (el_has_mmu()) {
-+ __asm_invalidate_tlb_all();
-+ mmu_setup();
-+ } else {
-+ mpu_setup();
-+ }
- }
-
- /* Set up page tables only once (it is done also by mmu_setup()) */
-@@ -523,7 +614,11 @@ void dcache_disable(void)
- set_sctlr(sctlr & ~(CR_C|CR_M));
-
- flush_dcache_all();
-- __asm_invalidate_tlb_all();
-+
-+ if (el_has_mmu())
-+ __asm_invalidate_tlb_all();
-+ else
-+ mpu_clear_regions();
- }
-
- int dcache_status(void)
-diff --git a/arch/arm/include/asm/armv8/mpu.h b/arch/arm/include/asm/armv8/mpu.h
-new file mode 100644
-index 0000000000..8de627cafd
---- /dev/null
-+++ b/arch/arm/include/asm/armv8/mpu.h
-@@ -0,0 +1,59 @@
-+/*
-+ * SPDX-License-Identifier: GPL-2.0+
-+ *
-+ * (C) Copyright 2021 Arm Limited
-+ */
-+
-+#ifndef _ASM_ARMV8_MPU_H_
-+#define _ASM_ARMV8_MPU_H_
-+
-+#include <asm/armv8/mmu.h>
-+#include <linux/stringify.h>
-+
-+#define PRSELR_EL2 S3_4_c6_c2_1
-+#define PRBAR_EL2 S3_4_c6_c8_0
-+#define PRLAR_EL2 S3_4_c6_c8_1
-+#define MPUIR_EL2 S3_4_c0_c0_4
-+
-+#define PRBAR_ADDRESS(addr) ((addr) & ~(0x3fULL))
-+
-+/* Access permissions */
-+#define PRBAR_AP(val) (((val) & 0x3) << 2)
-+#define PRBAR_AP_RW_HYP PRBAR_AP(0x0)
-+#define PRBAR_AP_RW_ANY PRBAR_AP(0x1)
-+#define PRBAR_AP_RO_HYP PRBAR_AP(0x2)
-+#define PRBAR_AP_RO_ANY PRBAR_AP(0x3)
-+
-+/* Shareability */
-+#define PRBAR_SH(val) (((val) & 0x3) << 4)
-+#define PRBAR_NON_SH PRBAR_SH(0x0)
-+#define PRBAR_OUTER_SH PRBAR_SH(0x2)
-+#define PRBAR_INNER_SH PRBAR_SH(0x3)
-+
-+/* Memory attribute (MAIR idx) */
-+#define PRLAR_ATTRIDX(val) (((val) & 0x7) << 1)
-+#define PRLAR_EN_BIT (0x1)
-+#define PRLAR_ADDRESS(addr) ((addr) & ~(0x3fULL))
-+
-+#ifndef __ASSEMBLY__
-+
-+static inline void setup_el2_mpu_region(uint8_t region, uint64_t base, uint64_t limit)
-+{
-+ asm volatile("msr " __stringify(PRSELR_EL2) ", %0" : : "r" (region));
-+ asm volatile("msr " __stringify(PRBAR_EL2) ", %0" : : "r" (base));
-+ asm volatile("msr " __stringify(PRLAR_EL2) ", %0" : : "r" (limit));
-+
-+ asm volatile("isb");
-+}
-+
-+#endif
-+
-+struct mpu_region {
-+ u64 start;
-+ u64 end;
-+ u64 attrs;
-+};
-+
-+extern struct mpu_region *mpu_mem_map;
-+
-+#endif /* _ASM_ARMV8_MPU_H_ */
-diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
-index 87d1c77e8b..4510db98a2 100644
---- a/arch/arm/include/asm/system.h
-+++ b/arch/arm/include/asm/system.h
-@@ -95,6 +95,25 @@
- auth algorithm */
- #define ID_AA64ISAR1_EL1_APA (0xF << 4) /* QARMA address auth algorithm */
-
-+/*
-+ * ID_AA64MMFR0_EL1 bits definitions
-+ */
-+#define ID_AA64MMFR0_EL1_MSA_FRAC_MASK (0xFUL << 52) /* Memory system
-+ architecture
-+ frac */
-+#define ID_AA64MMFR0_EL1_MSA_FRAC_VMSA (0x2UL << 52) /* EL1&0 supports
-+ VMSA */
-+#define ID_AA64MMFR0_EL1_MSA_FRAC_PMSA (0x1UL << 52) /* EL1&0 only
-+ supports PMSA*/
-+#define ID_AA64MMFR0_EL1_MSA_FRAC_NO_PMSA (0x0UL << 52) /* No PMSA
-+ support */
-+#define ID_AA64MMFR0_EL1_MSA_MASK (0xFUL << 48) /* Memory system
-+ architecture */
-+#define ID_AA64MMFR0_EL1_MSA_USE_FRAC (0xFUL << 48) /* Use MSA_FRAC */
-+#define ID_AA64MMFR0_EL1_MSA_VMSA (0x0UL << 48) /* Memory system
-+ architecture
-+ is VMSA */
-+
- /*
- * ID_AA64PFR0_EL1 bits definitions
- */
deleted file mode 100644
@@ -1,59 +0,0 @@
-From 5b42322cb57692dbea7d2c39fd8769b6f0f6b7af Mon Sep 17 00:00:00 2001
-From: Qi Feng <qi.feng@arm.com>
-Date: Tue, 26 Jul 2022 18:13:23 +0800
-Subject: [PATCH] vexpress64: add MPU memory map for the BASER_FVP
-
-The previous patch added support for initializing an Armv8 MPU. There is only an
-MPU at S-EL2 on the BASER_FVP, so add a platform-specific MPU memory map.
-
-See https://developer.arm.com/documentation/100964/1117/Base-Platform/Base---memory/BaseR-Platform-memory-map
-
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Signed-off-by: Qi Feng <qi.feng@arm.com>
-
----
- board/armltd/vexpress64/vexpress64.c | 22 ++++++++++++++++++++++
- 1 file changed, 22 insertions(+)
-
-diff --git a/board/armltd/vexpress64/vexpress64.c b/board/armltd/vexpress64/vexpress64.c
-index af326dc6f4..2310d18eb7 100644
---- a/board/armltd/vexpress64/vexpress64.c
-+++ b/board/armltd/vexpress64/vexpress64.c
-@@ -19,6 +19,7 @@
- #include <dm/platform_data/serial_pl01x.h>
- #include "pcie.h"
- #include <asm/armv8/mmu.h>
-+#include <asm/armv8/mpu.h>
- #ifdef CONFIG_VIRTIO_NET
- #include <virtio_types.h>
- #include <virtio.h>
-@@ -37,6 +38,27 @@ U_BOOT_DRVINFO(vexpress_serials) = {
- .plat = &serial_plat,
- };
-
-+static struct mpu_region vexpress64_aemv8r_mem_map[] = {
-+ {
-+ .start = 0x0UL,
-+ .end = 0x7fffffffUL,
-+ .attrs = PRLAR_ATTRIDX(MT_NORMAL)
-+ }, {
-+ .start = 0x80000000UL,
-+ .end = 0xffffffffUL,
-+ .attrs = PRLAR_ATTRIDX(MT_DEVICE_NGNRNE)
-+ }, {
-+ .start = 0x100000000UL,
-+ .end = 0xffffffffffUL,
-+ .attrs = PRLAR_ATTRIDX(MT_NORMAL)
-+ }, {
-+ /* List terminator */
-+ 0,
-+ }
-+};
-+
-+struct mpu_region *mpu_mem_map = vexpress64_aemv8r_mem_map;
-+
- static struct mm_region vexpress64_mem_map[] = {
- {
- .virt = V2M_PA_BASE,
deleted file mode 100644
@@ -1,104 +0,0 @@
-From ffb0f72a67926c3053308cf03420bc0c36675d42 Mon Sep 17 00:00:00 2001
-From: Peter Hoyes <Peter.Hoyes@arm.com>
-Date: Fri, 10 Dec 2021 11:41:19 +0000
-Subject: [PATCH] armv8: Allow disabling exception vectors on non-SPL builds
-
-On the BASER_FVP, U-Boot shares EL2 with another bootloader, so we do
-not wish to overide the exception vector, but we are also not using an
-SPL build.
-
-Therefore, add ARMV8_EXCEPTION_VECTORS, which disables exception vectors
-in a similar way to ARMV8_SPL_EXCEPTION_VECTORS.
-
-Rename ARMV8_SPL_EXCEPTION_VECTORS -> SPL_ARMV8_EXCEPTION_VECTORS so
-that both config flags be be targeted using CONFIG_IS_ENABLED.
-
-Issue-Id: SCM-3728
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Change-Id: I0cf0fc6d7ef4d45791411cf1f67c65e198cc8b2b
-
----
- arch/arm/cpu/armv8/Kconfig | 10 ++++++++--
- arch/arm/cpu/armv8/Makefile | 6 ++----
- arch/arm/cpu/armv8/start.S | 4 ++--
- configs/vexpress_aemv8r_defconfig | 1 +
- 4 files changed, 13 insertions(+), 8 deletions(-)
-
-diff --git a/arch/arm/cpu/armv8/Kconfig b/arch/arm/cpu/armv8/Kconfig
-index 1305238c9d..dec4be0e30 100644
---- a/arch/arm/cpu/armv8/Kconfig
-+++ b/arch/arm/cpu/armv8/Kconfig
-@@ -1,8 +1,8 @@
- if ARM64
-
--config ARMV8_SPL_EXCEPTION_VECTORS
-+config ARMV8_EXCEPTION_VECTORS
- bool "Install crash dump exception vectors"
-- depends on SPL
-+ default y
- help
- The default exception vector table is only used for the crash
- dump, but still takes quite a lot of space in the image size.
-@@ -10,6 +10,12 @@ config ARMV8_SPL_EXCEPTION_VECTORS
- Say N here if you are running out of code space in the image
- and want to save some space at the cost of less debugging info.
-
-+config SPL_ARMV8_EXCEPTION_VECTORS
-+ bool "Install crash dump exception vectors in the SPL"
-+ depends on SPL
-+ help
-+ Same as ARMV8_EXCEPTION_VECTORS, but for SPL builds
-+
- config ARMV8_MULTIENTRY
- bool "Enable multiple CPUs to enter into U-Boot"
-
-diff --git a/arch/arm/cpu/armv8/Makefile b/arch/arm/cpu/armv8/Makefile
-index 2e4bf9e038..001a31cae7 100644
---- a/arch/arm/cpu/armv8/Makefile
-+++ b/arch/arm/cpu/armv8/Makefile
-@@ -13,10 +13,8 @@ ifndef CONFIG_$(SPL_)SYS_DCACHE_OFF
- obj-y += cache_v8.o
- obj-y += cache.o
- endif
--ifdef CONFIG_SPL_BUILD
--obj-$(CONFIG_ARMV8_SPL_EXCEPTION_VECTORS) += exceptions.o
--else
--obj-y += exceptions.o
-+obj-$(CONFIG_$(SPL_)ARMV8_EXCEPTION_VECTORS) += exceptions.o
-+ifndef CONFIG_SPL_BUILD
- obj-y += exception_level.o
- endif
- obj-y += tlb.o
-diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S
-index f3ea858577..7fad901336 100644
---- a/arch/arm/cpu/armv8/start.S
-+++ b/arch/arm/cpu/armv8/start.S
-@@ -104,7 +104,7 @@ pie_skip_reloc:
- pie_fixup_done:
- #endif
-
--#if defined(CONFIG_ARMV8_SPL_EXCEPTION_VECTORS) || !defined(CONFIG_SPL_BUILD)
-+#if CONFIG_IS_ENABLED(ARMV8_EXCEPTION_VECTORS)
- .macro set_vbar, regname, reg
- msr \regname, \reg
- .endm
-@@ -354,7 +354,7 @@ ENDPROC(smp_kick_all_cpus)
- /*-----------------------------------------------------------------------*/
-
- ENTRY(c_runtime_cpu_setup)
--#if defined(CONFIG_ARMV8_SPL_EXCEPTION_VECTORS) || !defined(CONFIG_SPL_BUILD)
-+#if CONFIG_IS_ENABLED(ARMV8_EXCEPTION_VECTORS)
- /* Relocate vBAR */
- adr x0, vectors
- switch_el x1, 3f, 2f, 1f
-diff --git a/configs/vexpress_aemv8r_defconfig b/configs/vexpress_aemv8r_defconfig
-index 495eb1dee3..683d983c36 100644
---- a/configs/vexpress_aemv8r_defconfig
-+++ b/configs/vexpress_aemv8r_defconfig
-@@ -16,3 +16,4 @@ CONFIG_SYS_CBSIZE=512
- CONFIG_SYS_PBSIZE=541
- # CONFIG_MMC is not set
- CONFIG_VIRTIO_MMIO=y
-+CONFIG_ARMV8_EXCEPTION_VECTORS=n
deleted file mode 100644
@@ -1,140 +0,0 @@
-From 14e204ffca5870d6bfd238627937a2028c88589d Mon Sep 17 00:00:00 2001
-From: Peter Hoyes <Peter.Hoyes@arm.com>
-Date: Wed, 14 Jul 2021 12:44:27 +0100
-Subject: [PATCH] armv8: ARMV8_SWITCH_TO_EL1 improvements
-
-Convert CONFIG_ARMV8_SWITCH_TO_EL1 to a Kconfig variable.
-
-Add support for switching to EL1 to bootefi.
-
-Add the environment variable armv8_switch_to_el1 to allow configuring
-whether to switch to EL1 at runtime. This overrides the compile-time
-option.
-
-Issue-Id: SCM-3728
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Change-Id: If98478148d6d8d1f732acac5439276700614815f
-
----
- arch/arm/cpu/armv8/exception_level.c | 21 ++++++++++++++--
- arch/arm/lib/bootm.c | 36 ++++++++++++++++------------
- configs/vexpress_aemv8r_defconfig | 1 +
- 3 files changed, 41 insertions(+), 17 deletions(-)
-
-diff --git a/arch/arm/cpu/armv8/exception_level.c b/arch/arm/cpu/armv8/exception_level.c
-index b11936548f..4aad1550f4 100644
---- a/arch/arm/cpu/armv8/exception_level.c
-+++ b/arch/arm/cpu/armv8/exception_level.c
-@@ -40,19 +40,36 @@ static void entry_non_secure(struct jmp_buf_data *non_secure_jmp)
- * trusted firmware being one embodiment). The operating system shall be
- * started at exception level EL2. So here we check the exception level
- * and switch it if necessary.
-+ *
-+ * If armv8_switch_to_el1 (config or env var) is enabled, also switch to EL1
-+ * before booting the operating system.
- */
- void switch_to_non_secure_mode(void)
- {
- struct jmp_buf_data non_secure_jmp;
-
- /* On AArch64 we need to make sure we call our payload in < EL3 */
-- if (current_el() == 3) {
-+
-+ int switch_to_el1 = env_get_yesno("armv8_switch_to_el1");
-+#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
-+ if (switch_to_el1 == -1) {
-+ switch_to_el1 = 1;
-+ }
-+#endif
-+
-+ if (current_el() > 2) {
- if (setjmp(&non_secure_jmp))
- return;
- dcache_disable(); /* flush cache before switch to EL2 */
--
- /* Move into EL2 and keep running there */
- armv8_switch_to_el2((uintptr_t)&non_secure_jmp, 0, 0, 0,
- (uintptr_t)entry_non_secure, ES_TO_AARCH64);
-+ } else if (switch_to_el1 == 1 && current_el() > 1) {
-+ if (setjmp(&non_secure_jmp))
-+ return;
-+ dcache_disable(); /* flush cache before switch to EL1 */
-+ /* Move into EL1 and keep running there */
-+ armv8_switch_to_el1((uintptr_t)&non_secure_jmp, 0, 0, 0,
-+ (uintptr_t)entry_non_secure, ES_TO_AARCH64);
- }
- }
-diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
-index e414ef8267..9a86c17d2a 100644
---- a/arch/arm/lib/bootm.c
-+++ b/arch/arm/lib/bootm.c
-@@ -270,7 +270,6 @@ __weak void update_os_arch_secondary_cores(uint8_t os_arch)
- {
- }
-
--#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
- static void switch_to_el1(void)
- {
- if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
-@@ -285,7 +284,6 @@ static void switch_to_el1(void)
- ES_TO_AARCH64);
- }
- #endif
--#endif
-
- /* Subcommand: GO */
- static void boot_jump_linux(struct bootm_headers *images, int flag)
-@@ -312,21 +310,29 @@ static void boot_jump_linux(struct bootm_headers *images, int flag)
-
- update_os_arch_secondary_cores(images->os.arch);
-
-+ int armv8_switch_to_el1 = env_get_yesno("armv8_switch_to_el1");
- #ifdef CONFIG_ARMV8_SWITCH_TO_EL1
-- armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
-- (u64)switch_to_el1, ES_TO_AARCH64);
--#else
-- if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
-- (images->os.arch == IH_ARCH_ARM))
-- armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number,
-- (u64)images->ft_addr, 0,
-- (u64)images->ep,
-- ES_TO_AARCH32);
-- else
-- armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
-- images->ep,
-- ES_TO_AARCH64);
-+ if (armv8_switch_to_el1 == -1) {
-+ armv8_switch_to_el1 = 1;
-+ }
- #endif
-+ if (armv8_switch_to_el1 == 1) {
-+ armv8_switch_to_el2((u64)images->ft_addr, 0, 0, 0,
-+ (u64)switch_to_el1, ES_TO_AARCH64);
-+ } else {
-+ if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) &&
-+ (images->os.arch == IH_ARCH_ARM))
-+ armv8_switch_to_el2(0,
-+ (u64)gd->bd->bi_arch_number,
-+ (u64)images->ft_addr, 0,
-+ (u64)images->ep,
-+ ES_TO_AARCH32);
-+ else
-+ armv8_switch_to_el2((u64)images->ft_addr,
-+ 0, 0, 0,
-+ images->ep,
-+ ES_TO_AARCH64);
-+ }
- }
- #else
- unsigned long machid = gd->bd->bi_arch_number;
-diff --git a/configs/vexpress_aemv8r_defconfig b/configs/vexpress_aemv8r_defconfig
-index 683d983c36..6044f82b00 100644
---- a/configs/vexpress_aemv8r_defconfig
-+++ b/configs/vexpress_aemv8r_defconfig
-@@ -17,3 +17,4 @@ CONFIG_SYS_PBSIZE=541
- # CONFIG_MMC is not set
- CONFIG_VIRTIO_MMIO=y
- CONFIG_ARMV8_EXCEPTION_VECTORS=n
-+CONFIG_ARMV8_SWITCH_TO_EL1=y
deleted file mode 100644
@@ -1,80 +0,0 @@
-From e3d24bc1fd0b09915b5181de1282f7008bbf776f Mon Sep 17 00:00:00 2001
-From: Peter Hoyes <Peter.Hoyes@arm.com>
-Date: Fri, 10 Dec 2021 16:37:26 +0000
-Subject: [PATCH] armv8: Make disabling HVC configurable when switching to EL1
-
-On the BASER_FVP there is no EL3, so HVC is used to provide PSCI
-services. Therefore we cannot disable hypercalls.
-
-Create CONFIG_ARMV8_DISABLE_HVC (dependent on CONFIG_ARMV8_TO_EL1) to
-control whether to disable HVC exceptions in HCR_EL2->HCD
-
-Issue-Id: SCM-3728
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Change-Id: I463d82f1db8a3cafcab40a9c0c208753569cc300
-
----
- arch/arm/cpu/armv8/Kconfig | 9 +++++++++
- arch/arm/include/asm/macro.h | 10 ++++++++--
- configs/vexpress_aemv8r_defconfig | 1 +
- 3 files changed, 18 insertions(+), 2 deletions(-)
-
-diff --git a/arch/arm/cpu/armv8/Kconfig b/arch/arm/cpu/armv8/Kconfig
-index dec4be0e30..95c03487a2 100644
---- a/arch/arm/cpu/armv8/Kconfig
-+++ b/arch/arm/cpu/armv8/Kconfig
-@@ -208,4 +208,13 @@ config ARMV8_CE_SHA256
-
- endif
-
-+config ARMV8_DISABLE_HVC
-+ bool "Disable HVC calls before switching to EL1"
-+ depends on ARMV8_SWITCH_TO_EL1
-+ default y
-+ help
-+ If switching to EL1 before loading the operating system, disable taking
-+ hypercalls back to EL2. May be disabled if, for example, PSCI services are
-+ running at EL2.
-+
- endif
-diff --git a/arch/arm/include/asm/macro.h b/arch/arm/include/asm/macro.h
-index 1a1edc9870..7167739210 100644
---- a/arch/arm/include/asm/macro.h
-+++ b/arch/arm/include/asm/macro.h
-@@ -296,9 +296,12 @@ lr .req x30
- ldr \tmp2, =(ID_AA64ISAR1_EL1_GPI | ID_AA64ISAR1_EL1_GPA | \
- ID_AA64ISAR1_EL1_API | ID_AA64ISAR1_EL1_APA)
- tst \tmp, \tmp2
-- mov \tmp2, #(HCR_EL2_RW_AARCH64 | HCR_EL2_HCD_DIS)
-+ mov \tmp2, #(HCR_EL2_RW_AARCH64)
- orr \tmp, \tmp2, #(HCR_EL2_APK | HCR_EL2_API)
- csel \tmp, \tmp2, \tmp, eq
-+#ifdef CONFIG_ARMV8_DISABLE_HVC
-+ orr \tmp, \tmp, #(HCR_EL2_HCD_DIS)
-+#endif
- msr hcr_el2, \tmp
-
- /* Return to the EL1_SP1 mode from EL2 */
-@@ -311,7 +314,10 @@ lr .req x30
-
- 1:
- /* Initialize HCR_EL2 */
-- ldr \tmp, =(HCR_EL2_RW_AARCH32 | HCR_EL2_HCD_DIS)
-+ ldr \tmp, =(HCR_EL2_RW_AARCH32)
-+#ifdef CONFIG_ARMV8_DISABLE_HVC
-+ orr \tmp, \tmp, #(HCR_EL2_HCD_DIS)
-+#endif
- msr hcr_el2, \tmp
-
- /* Return to AArch32 Supervisor mode from EL2 */
-diff --git a/configs/vexpress_aemv8r_defconfig b/configs/vexpress_aemv8r_defconfig
-index 6044f82b00..6226f6b2c1 100644
---- a/configs/vexpress_aemv8r_defconfig
-+++ b/configs/vexpress_aemv8r_defconfig
-@@ -18,3 +18,4 @@ CONFIG_SYS_PBSIZE=541
- CONFIG_VIRTIO_MMIO=y
- CONFIG_ARMV8_EXCEPTION_VECTORS=n
- CONFIG_ARMV8_SWITCH_TO_EL1=y
-+CONFIG_ARMV8_DISABLE_HVC=n
deleted file mode 100644
@@ -1,30 +0,0 @@
-From 571f44d5292cfead6f68bf4c6c9519872337bfd0 Mon Sep 17 00:00:00 2001
-From: Qi Feng <qi.feng@arm.com>
-Date: Thu, 28 Jul 2022 17:47:18 +0800
-Subject: [PATCH] vexpress64: Do not set COUNTER_FREQUENCY
-
-VExpress boards normally run as a second-stage bootloader so should not
-need to modify CNTFRQ_EL0. On the BASER_FVP, U-Boot can modify it if
-running at EL2, but shouldn't because it might be different from the
-value being used by the first-stage bootloader (which might be
-providing PSCI services).
-
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Signed-off-by: Qi Feng <qi.feng@arm.com>
-
----
- configs/vexpress_aemv8r_defconfig | 1 -
- 1 file changed, 1 deletion(-)
-
-diff --git a/configs/vexpress_aemv8r_defconfig b/configs/vexpress_aemv8r_defconfig
-index 6226f6b2c1..b902a6a7d9 100644
---- a/configs/vexpress_aemv8r_defconfig
-+++ b/configs/vexpress_aemv8r_defconfig
-@@ -1,5 +1,4 @@
- CONFIG_ARM=y
--CONFIG_COUNTER_FREQUENCY=24000000
- CONFIG_ARCH_VEXPRESS64=y
- CONFIG_NR_DRAM_BANKS=2
- CONFIG_DEFAULT_DEVICE_TREE="arm_fvp"
deleted file mode 100644
@@ -1,25 +0,0 @@
-From df01346bb63c821cf8e73202e2894ceda9cb692b Mon Sep 17 00:00:00 2001
-From: Peter Hoyes <Peter.Hoyes@arm.com>
-Date: Tue, 22 Feb 2022 15:32:51 +0000
-Subject: [PATCH] vexpress64: Enable LIBFDT_OVERLAY in the vexpress_aemv8r
- defconfig
-
-Issue-Id: SCM-3874
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Change-Id: Ide0532cf2de89f1bca9c8d4bd2ed0c1a1c57599f
-
----
- configs/vexpress_aemv8r_defconfig | 1 +
- 1 file changed, 1 insertion(+)
-
-diff --git a/configs/vexpress_aemv8r_defconfig b/configs/vexpress_aemv8r_defconfig
-index b902a6a7d9..a58a9db385 100644
---- a/configs/vexpress_aemv8r_defconfig
-+++ b/configs/vexpress_aemv8r_defconfig
-@@ -18,3 +18,4 @@ CONFIG_VIRTIO_MMIO=y
- CONFIG_ARMV8_EXCEPTION_VECTORS=n
- CONFIG_ARMV8_SWITCH_TO_EL1=y
- CONFIG_ARMV8_DISABLE_HVC=n
-+CONFIG_OF_LIBFDT_OVERLAY=y
deleted file mode 100644
@@ -1,103 +0,0 @@
-From 665ab8253a0e3e17db54a1682bbee0f5659939a2 Mon Sep 17 00:00:00 2001
-From: Peter Hoyes <Peter.Hoyes@arm.com>
-Date: Wed, 18 May 2022 15:24:19 +0100
-Subject: [PATCH] armv8: Allow PRBAR MPU attributes to be configured
-
-In a previous patch, support was added to initialize an S-EL2 MPU on
-armv8r64 machines. This implementation allowed the PRLAR attribute
-index to be configured, but not the shareability and access permission
-attributes in PRBAR. These attributes were hard-coded as "outer
-shareable" and "read/write at EL1 and EL0".
-
-Add separate prlar_attrs and prbar_attrs to the MPU region struct so
-that these attributes can be configured on a per-region basis.
-
-For the BASER_FVP, ensure the MPU memory attributes match those in the
-existing vexpress64 board MMU configuration ("non shareable" for device
-memory and "inner shareable" for normal memory).
-
-Issue-Id: SCM-4641
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Change-Id: I6b72aead91ad12412262aa32c61a53e12eab3984
-
----
- arch/arm/cpu/armv8/cache_v8.c | 12 ++++++++----
- arch/arm/include/asm/armv8/mpu.h | 3 ++-
- board/armltd/vexpress64/vexpress64.c | 9 ++++++---
- 3 files changed, 16 insertions(+), 8 deletions(-)
-
-diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c
-index 8611a35eb3..f7de952187 100644
---- a/arch/arm/cpu/armv8/cache_v8.c
-+++ b/arch/arm/cpu/armv8/cache_v8.c
-@@ -390,7 +390,9 @@ static void mpu_clear_regions(void)
- {
- int i;
-
-- for (i = 0; mpu_mem_map[i].end || mpu_mem_map[i].attrs; i++) {
-+ for (i = 0; mpu_mem_map[i].end ||
-+ mpu_mem_map[i].prbar_attrs ||
-+ mpu_mem_map[i].prlar_attrs; i++) {
- setup_el2_mpu_region(i, 0, 0);
- }
- }
-@@ -410,12 +412,14 @@ static void mpu_setup(void)
-
- asm volatile("msr MAIR_EL2, %0" : : "r" MEMORY_ATTRIBUTES);
-
-- for (i = 0; mpu_mem_map[i].end || mpu_mem_map[i].attrs; i++) {
-+ for (i = 0; mpu_mem_map[i].end ||
-+ mpu_mem_map[i].prbar_attrs ||
-+ mpu_mem_map[i].prlar_attrs; i++) {
- setup_el2_mpu_region(i,
- PRBAR_ADDRESS(mpu_mem_map[i].start)
-- | PRBAR_OUTER_SH | PRBAR_AP_RW_ANY,
-+ | mpu_mem_map[i].prbar_attrs,
- PRLAR_ADDRESS(mpu_mem_map[i].end)
-- | mpu_mem_map[i].attrs | PRLAR_EN_BIT
-+ | mpu_mem_map[i].prlar_attrs | PRLAR_EN_BIT
- );
- }
-
-diff --git a/arch/arm/include/asm/armv8/mpu.h b/arch/arm/include/asm/armv8/mpu.h
-index 8de627cafd..dd4c689ea6 100644
---- a/arch/arm/include/asm/armv8/mpu.h
-+++ b/arch/arm/include/asm/armv8/mpu.h
-@@ -51,7 +51,8 @@ static inline void setup_el2_mpu_region(uint8_t region, uint64_t base, uint64_t
- struct mpu_region {
- u64 start;
- u64 end;
-- u64 attrs;
-+ u64 prbar_attrs;
-+ u64 prlar_attrs;
- };
-
- extern struct mpu_region *mpu_mem_map;
-diff --git a/board/armltd/vexpress64/vexpress64.c b/board/armltd/vexpress64/vexpress64.c
-index 2310d18eb7..531fa4d618 100644
---- a/board/armltd/vexpress64/vexpress64.c
-+++ b/board/armltd/vexpress64/vexpress64.c
-@@ -42,15 +42,18 @@ static struct mpu_region vexpress64_aemv8r_mem_map[] = {
- {
- .start = 0x0UL,
- .end = 0x7fffffffUL,
-- .attrs = PRLAR_ATTRIDX(MT_NORMAL)
-+ .prbar_attrs = PRBAR_INNER_SH | PRBAR_AP_RW_ANY,
-+ .prlar_attrs = PRLAR_ATTRIDX(MT_NORMAL)
- }, {
- .start = 0x80000000UL,
- .end = 0xffffffffUL,
-- .attrs = PRLAR_ATTRIDX(MT_DEVICE_NGNRNE)
-+ .prbar_attrs = PRBAR_OUTER_SH | PRBAR_AP_RW_ANY,
-+ .prlar_attrs = PRLAR_ATTRIDX(MT_DEVICE_NGNRNE)
- }, {
- .start = 0x100000000UL,
- .end = 0xffffffffffUL,
-- .attrs = PRLAR_ATTRIDX(MT_NORMAL)
-+ .prbar_attrs = PRBAR_INNER_SH | PRBAR_AP_RW_ANY,
-+ .prlar_attrs = PRLAR_ATTRIDX(MT_NORMAL)
- }, {
- /* List terminator */
- 0,
deleted file mode 100644
@@ -1,61 +0,0 @@
-From c7301588a3aec9ebf36749da601d0d6e3d807bfc Mon Sep 17 00:00:00 2001
-From: Peter Hoyes <Peter.Hoyes@arm.com>
-Date: Thu, 19 May 2022 09:02:32 +0100
-Subject: [PATCH] armv8: Enable icache when switching exception levels in
- bootefi
-
-bootefi calls the function switch_to_non_secure_mode before calling the
-UEFI payload to handle the case where U-Boot is running at EL3.
-
-For AArch64, the UEFI specification states that:
- The core will be configured as follows:
- * MMU enabled
- * Instruction and data caches enabled
-
-These requirements should be followed when switching exception levels
-for EFI applications.
-
-This function already disables and re-enables the data cache prior to
-switching exception levels, but omits the instruction cache, meaning
-the function returns with the instruction cache disabled at the new
-exception level. Fix this by calling icache_disable prior to switching
-exception levels and icache_enable afterwards.
-
-Issue-Id: SCM-4641
-Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
-Upstream-Status: Inappropriate [other]
- Implementation pending further discussion
-Change-Id: I678cd5ba39b56e124ab7854608289cd14651ce65
-
----
- arch/arm/cpu/armv8/exception_level.c | 3 +++
- 1 file changed, 3 insertions(+)
-
-diff --git a/arch/arm/cpu/armv8/exception_level.c b/arch/arm/cpu/armv8/exception_level.c
-index 4aad1550f4..0a3e5428e7 100644
---- a/arch/arm/cpu/armv8/exception_level.c
-+++ b/arch/arm/cpu/armv8/exception_level.c
-@@ -27,6 +27,7 @@
- static void entry_non_secure(struct jmp_buf_data *non_secure_jmp)
- {
- dcache_enable();
-+ icache_enable();
- debug("Reached non-secure mode\n");
-
- /* Restore stack and registers saved in switch_to_non_secure_mode() */
-@@ -61,6 +62,7 @@ void switch_to_non_secure_mode(void)
- if (setjmp(&non_secure_jmp))
- return;
- dcache_disable(); /* flush cache before switch to EL2 */
-+ icache_disable();
- /* Move into EL2 and keep running there */
- armv8_switch_to_el2((uintptr_t)&non_secure_jmp, 0, 0, 0,
- (uintptr_t)entry_non_secure, ES_TO_AARCH64);
-@@ -68,6 +70,7 @@ void switch_to_non_secure_mode(void)
- if (setjmp(&non_secure_jmp))
- return;
- dcache_disable(); /* flush cache before switch to EL1 */
-+ icache_disable();
- /* Move into EL1 and keep running there */
- armv8_switch_to_el1((uintptr_t)&non_secure_jmp, 0, 0, 0,
- (uintptr_t)entry_non_secure, ES_TO_AARCH64);
@@ -53,23 +53,6 @@ SRC_URI:append:corstone1000 = " \
SRC_URI:append:fvp-base = " file://bootargs.cfg \
file://0001-Revert-vexpress64-pick-DRAM-size-from-DT.patch \
"
-
-#
-# FVP BASER
-#
-SRC_URI:append:fvp-baser-aemv8r64 = " \
- file://0001-armv8-Add-ARMv8-MPU-configuration-logic.patch \
- file://0002-vexpress64-add-MPU-memory-map-for-the-BASER_FVP.patch \
- file://0003-armv8-Allow-disabling-exception-vectors-on-non-SPL-b.patch \
- file://0004-armv8-ARMV8_SWITCH_TO_EL1-improvements.patch \
- file://0005-armv8-Make-disabling-HVC-configurable-when-switching.patch \
- file://0006-vexpress64-Do-not-set-COUNTER_FREQUENCY.patch \
- file://0007-vexpress64-Enable-LIBFDT_OVERLAY-in-the-vexpress_aem.patch \
- file://0008-armv8-Allow-PRBAR-MPU-attributes-to-be-configured.patch \
- file://0009-armv8-Enable-icache-when-switching-exception-levels-.patch \
- "
-
-
#
# Juno Machines
#
deleted file mode 100644
@@ -1,6 +0,0 @@
-define KMACHINE fvp-baser-aemv8r64
-define KTYPE preempt-rt
-define KARCH arm64
-
-include ktypes/preempt-rt/preempt-rt.scc
-include fvp-baser-aemv8r64.scc
deleted file mode 100644
@@ -1,7 +0,0 @@
-define KMACHINE fvp-baser-aemv8r64
-define KTYPE standard
-define KARCH arm64
-
-include ktypes/standard/standard.scc
-
-include fvp-baser-aemv8r64.scc
deleted file mode 100644
@@ -1,4 +0,0 @@
-kconf hardware arm64.cfg
-kconf hardware fvp-common-peripherals.cfg
-include cfg/virtio.scc
-include virtio-9p.scc
deleted file mode 100644
@@ -1,212 +0,0 @@
-/dts-v1/;
-
-/ {
-
- #address-cells = <0x2>;
- #size-cells = <0x2>;
- interrupt-parent = <0x1>;
- model = "Generated";
- compatible = "arm,base";
-
- memory@0 {
- #address-cells = <0x2>;
- #size-cells = <0x2>;
- device_type = "memory";
- reg = <0x0 0x0 0x0 0x80000000>,
- <0x00000008 0x80000000 0x0 0x80000000>;
- };
-
- cpus {
- #address-cells = <0x2>;
- #size-cells = <0x0>;
-
- cpu-map {
- cluster0 {
- core0 { thread0 { cpu = <&CPU_0>; }; };
- core1 { thread0 { cpu = <&CPU_1>; }; };
- core2 { thread0 { cpu = <&CPU_2>; }; };
- core3 { thread0 { cpu = <&CPU_3>; }; };
- };
- };
-
- CPU_0: cpu@0 {
- device_type = "cpu";
- compatible = "arm,armv8";
- reg = <0x0 0x0>;
- enable-method = "spin-table";
- cpu-release-addr = <0x0 0x7f800>;
- };
-
- CPU_1: cpu@1 {
- device_type = "cpu";
- compatible = "arm,armv8";
- reg = <0x0 0x1>;
- enable-method = "spin-table";
- cpu-release-addr = <0x0 0x7f808>;
- };
-
- CPU_2: cpu@2 {
- device_type = "cpu";
- compatible = "arm,armv8";
- reg = <0x0 0x2>;
- enable-method = "spin-table";
- cpu-release-addr = <0x0 0x7f810>;
- };
-
- CPU_3: cpu@3 {
- device_type = "cpu";
- compatible = "arm,armv8";
- reg = <0x0 0x3>;
- enable-method = "spin-table";
- cpu-release-addr = <0x0 0x7f818>;
- };
- };
-
- interrupt-controller@af000000 {
- compatible = "arm,gic-v3";
- #interrupt-cells = <0x3>;
- #address-cells = <0x2>;
- #size-cells = <0x2>;
- ranges;
- interrupt-controller;
- #redistributor-regions = <0x1>;
- reg = <0x0 0xaf000000 0x0 0x10000>, // GICD
- <0x0 0xaf100000 0x0 0x100000>, // GICR
- <0x0 0xac000000 0x0 0x2000>, // GICC
- <0x0 0xac010000 0x0 0x2000>, // GICH
- <0x0 0xac02f000 0x0 0x2000>; // GICV
- interrupts = <0x1 9 0x4>;
- linux,phandle = <0x1>;
- phandle = <0x1>;
-
- its: msi-controller@2f020000 {
- #msi-cells = <1>;
- compatible = "arm,gic-v3-its";
- reg = <0x0 0xaf020000 0x0 0x20000>; // GITS
- msi-controller;
- };
-
- };
-
- refclk100mhz: refclk100mhz {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <100000000>;
- clock-output-names = "apb_pclk";
- };
-
- refclk24mhz: refclk24mhz {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <24000000>;
- clock-output-names = "refclk24mhz";
- };
-
- refclk1hz: refclk1hz {
- compatible = "fixed-clock";
- #clock-cells = <0>;
- clock-frequency = <1>;
- clock-output-names = "refclk1hz";
- };
-
- uart@9c090000 {
- compatible = "arm,pl011", "arm,primecell";
- reg = <0x0 0x9c090000 0x0 0x1000>;
- interrupts = <0x0 5 0x4>;
- clocks = <&refclk24mhz>, <&refclk100mhz>;
- clock-names = "uartclk", "apb_pclk";
- };
-
- uart@9c0a0000 {
- compatible = "arm,pl011", "arm,primecell";
- reg = <0x0 0x9c0a0000 0x0 0x1000>;
- interrupts = <0x0 6 0x4>;
- clocks = <&refclk24mhz>, <&refclk100mhz>;
- clock-names = "uartclk", "apb_pclk";
- };
-
- uart@9c0b0000 {
- compatible = "arm,pl011", "arm,primecell";
- reg = <0x0 0x9c0b0000 0x0 0x1000>;
- interrupts = <0x0 7 0x4>;
- clocks = <&refclk24mhz>, <&refclk100mhz>;
- clock-names = "uartclk", "apb_pclk";
- };
-
- uart@9c0c0000 {
- compatible = "arm,pl011", "arm,primecell";
- reg = <0x0 0x9c0c0000 0x0 0x1000>;
- interrupts = <0x0 8 0x4>;
- clocks = <&refclk24mhz>, <&refclk100mhz>;
- clock-names = "uartclk", "apb_pclk";
- };
-
- wdt@9c0f0000 {
- compatible = "arm,sp805", "arm,primecell";
- reg = <0x0 0x9c0f0000 0x0 0x1000>;
- interrupts = <0x0 0 0x4>;
- clocks = <&refclk24mhz>, <&refclk100mhz>;
- clock-names = "wdog_clk", "apb_pclk";
- };
-
- rtc@9c170000 {
- compatible = "arm,pl031", "arm,primecell";
- reg = <0x0 0x9c170000 0x0 0x1000>;
- interrupts = <0x0 4 0x4>;
- clocks = <&refclk1hz>;
- clock-names = "apb_pclk";
- };
-
- virtio-block@9c130000 {
- compatible = "virtio,mmio";
- reg = <0 0x9c130000 0 0x200>;
- interrupts = <0x0 42 0x4>;
- };
-
- virtio-p9@9c140000{
- compatible = "virtio,mmio";
- reg = <0x0 0x9c140000 0x0 0x1000>;
- interrupts = <0x0 43 0x4>;
- };
-
- virtio-net@9c150000 {
- compatible = "virtio,mmio";
- reg = <0 0x9c150000 0 0x200>;
- interrupts = <0x0 44 0x4>;
- };
-
- virtio-rng@9c200000 {
- compatible = "virtio,mmio";
- reg = <0 0x9c200000 0 0x200>;
- interrupts = <0x0 46 0x4>;
- };
-
- timer {
- compatible = "arm,armv8-timer";
- interrupts = <0x1 13 0xff08>,
- <0x1 14 0xff08>,
- <0x1 11 0xff08>,
- <0x1 4 0xff08>;
- clock-frequency = <100000000>;
- };
-
- aliases {
- serial0 = "/uart@9c090000";
- serial1 = "/uart@9c0a0000";
- serial2 = "/uart@9c0b0000";
- serial3 = "/uart@9c0c0000";
- };
-
- pmu {
- compatible = "arm,armv8-pmuv3";
- interrupts = <0 60 4>,
- <0 61 4>,
- <0 62 4>,
- <0 63 4>;
- };
-
- chosen {
- bootargs = "earlycon console=ttyAMA0 loglevel=8 rootfstype=ext4 root=/dev/vda1 rw";
- stdout-path = "serial0";
- };
-};
@@ -14,7 +14,6 @@ ARMBSPFILESPATHS := "${THISDIR}:${THISDIR}/files:"
# Arm platforms kmeta
SRC_URI_KMETA = "file://arm-platforms-kmeta;type=kmeta;name=arm-platforms-kmeta;destsuffix=arm-platforms-kmeta"
SRC_URI:append:fvp-base = " ${SRC_URI_KMETA}"
-SRC_URI:append:fvp-baser-aemv8r64 = " ${SRC_URI_KMETA}"
SRC_URI:append:juno = " ${SRC_URI_KMETA}"
SRC_URI:append:n1sdp = " ${SRC_URI_KMETA}"
SRCREV:arm-platforms-kmeta = "6147e82375aa9df8f2a162d42ea6406c79c854c5"
@@ -58,13 +57,6 @@ KMACHINE:fvp-base = "fvp"
FILESEXTRAPATHS:prepend:fvp-base := "${ARMBSPFILESPATHS}"
SRC_URI:append:fvp-base = " file://0001-arm64-dts-fvp-Enable-virtio-rng-support.patch"
-#
-# FVP BaseR AEMv8r64 Machine
-#
-COMPATIBLE_MACHINE:fvp-baser-aemv8r64 = "fvp-baser-aemv8r64"
-FILESEXTRAPATHS:prepend:fvp-baser-aemv8r64 := "${ARMBSPFILESPATHS}"
-SRC_URI:append:fvp-baser-aemv8r64 = " file://fvp-baser-aemv8r64.dts;subdir=git/arch/arm64/boot/dts/arm"
-
#
# Juno KMACHINE
#
@@ -1,6 +1,5 @@
# Only enable linux-yocto-rt for n1sdp and the Armv8-R AArch64 AEM FVP
LINUX_YOCTO_RT_REQUIRE ?= ""
LINUX_YOCTO_RT_REQUIRE:n1sdp = "linux-arm-platforms.inc"
-LINUX_YOCTO_RT_REQUIRE:fvp-baser-aemv8r64 = "linux-arm-platforms.inc"
require ${LINUX_YOCTO_RT_REQUIRE}
deleted file mode 100644
@@ -1,10 +0,0 @@
-require fvp-envelope.inc
-
-SUMMARY = "Arm Fixed Virtual Platform - Armv8-R Base Architecture Envelope Model FVP"
-LIC_FILES_CHKSUM = "file://license_terms/license_agreement.txt;md5=1a33828e132ba71861c11688dbb0bd16 \
- file://license_terms/third_party_licenses/third_party_licenses.txt;md5=34a1ba318d745f05e6197def68ea5411 \
- file://license_terms/third_party_licenses/arm_license_management_utilities/third_party_licenses.txt;md5=c09526c02e631abb95ad61528892552d"
-
-SRC_URI[fvp-x86_64.sha256sum] = "e819bfbccd91749345e3c7c6db22cbe41e02223118eb6395a4307ca81b175f7a"
-
-MODEL_CODE = "FVP_Base_AEMv8R"
The fvp-baser-aemv8r64 machine will not be actively maintained. Signed-off-by: Divin Raj <divin.raj@arm.com> --- .gitlab-ci.yml | 8 - ci/fvp-baser-aemv8r64.yml | 7 - documentation/runfvp.md | 2 +- kas/fvp-baser-aemv8r64-bsp.yml | 42 - kas/fvp-baser-aemv8r64-rt-bsp.yml | 8 - .../conf/machine/fvp-baser-aemv8r64.conf | 66 - .../include/arm/armv8r/arch-armv8r64.inc | 10 - .../documentation/fvp-baser-aemv8r64.md | 264 - ...oot-wrapper-aarch64-fvp-baser-aemv8r64.inc | 36 - .../boot-wrapper-aarch64_%.bbappend | 4 - ...abels-and-prepare-for-lower-EL-booti.patch | 135 - ...0002-aarch64-Prepare-for-EL1-booting.patch | 48 - ...aarch64-Prepare-for-lower-EL-booting.patch | 55 - ...04-gic-v3-Prepare-for-gicv3-with-EL2.patch | 105 - ...aarch64-Prepare-for-booting-with-EL2.patch | 63 - ...ce-EL2-boot-code-for-Armv8-R-AArch64.patch | 182 - ...e-psci-to-choose-between-smc-and-hvc.patch | 89 - ...4-Disable-CNTPCT_EL0-trap-for-v8-R64.patch | 48 - .../0009-lds-Mark-the-mem-range.patch | 38 - .../0010-common-Introduce-the-libfdt.patch | 6044 ----------------- ...-common-Add-essential-libc-functions.patch | 101 - ...dd-the-libfdt-to-the-Makefile-system.patch | 61 - .../0013-platform-Add-print_hex-func.patch | 67 - ...4-common-Add-mem-usage-to-memreserve.patch | 96 - ...dd-the-enable-keep-el-compile-option.patch | 102 - ...efile-Change-COUNTER_FREQ-to-100-MHz.patch | 31 - ...lush-cache-after-setting-branch_data.patch | 49 - ...8-PSCI-Add-function-call-entry-point.patch | 71 - ...-lds-Rearrange-and-mark-the-sections.patch | 58 - ...n-Provide-firmware-info-using-libfdt.patch | 342 - ...-Enable-firmware-node-initialization.patch | 95 - ...v8-Add-ARMv8-MPU-configuration-logic.patch | 257 - ...add-MPU-memory-map-for-the-BASER_FVP.patch | 59 - ...bling-exception-vectors-on-non-SPL-b.patch | 104 - ...mv8-ARMV8_SWITCH_TO_EL1-improvements.patch | 140 - ...ling-HVC-configurable-when-switching.patch | 80 - ...press64-Do-not-set-COUNTER_FREQUENCY.patch | 30 - ...e-LIBFDT_OVERLAY-in-the-vexpress_aem.patch | 25 - ...RBAR-MPU-attributes-to-be-configured.patch | 103 - ...che-when-switching-exception-levels-.patch | 61 - .../recipes-bsp/u-boot/u-boot_%.bbappend | 17 - .../fvp-baser-aemv8r64-preempt-rt.scc | 6 - .../fvp-baser-aemv8r64-standard.scc | 7 - .../bsp/arm-platforms/fvp-baser-aemv8r64.scc | 4 - .../fvp-baser-aemv8r64/fvp-baser-aemv8r64.dts | 212 - .../linux/linux-arm-platforms.inc | 8 - .../linux/linux-yocto-rt_%.bbappend | 1 - .../fvp/fvp-base-r-aem_11.22.14.bb | 10 - 48 files changed, 1 insertion(+), 9450 deletions(-) delete mode 100644 ci/fvp-baser-aemv8r64.yml delete mode 100644 kas/fvp-baser-aemv8r64-bsp.yml delete mode 100644 kas/fvp-baser-aemv8r64-rt-bsp.yml delete mode 100644 meta-arm-bsp/conf/machine/fvp-baser-aemv8r64.conf delete mode 100644 meta-arm-bsp/conf/machine/include/arm/armv8r/arch-armv8r64.inc delete mode 100644 meta-arm-bsp/documentation/fvp-baser-aemv8r64.md delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/boot-wrapper-aarch64-fvp-baser-aemv8r64.inc delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/boot-wrapper-aarch64_%.bbappend delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0001-aarch64-Rename-labels-and-prepare-for-lower-EL-booti.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0002-aarch64-Prepare-for-EL1-booting.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0003-aarch64-Prepare-for-lower-EL-booting.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0004-gic-v3-Prepare-for-gicv3-with-EL2.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0005-aarch64-Prepare-for-booting-with-EL2.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0006-aarch64-Introduce-EL2-boot-code-for-Armv8-R-AArch64.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0007-Allow-enable-psci-to-choose-between-smc-and-hvc.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0008-aarch64-Disable-CNTPCT_EL0-trap-for-v8-R64.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0009-lds-Mark-the-mem-range.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0010-common-Introduce-the-libfdt.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0011-common-Add-essential-libc-functions.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0012-Makefile-Add-the-libfdt-to-the-Makefile-system.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0013-platform-Add-print_hex-func.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0014-common-Add-mem-usage-to-memreserve.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0015-boot-Add-the-enable-keep-el-compile-option.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0016-Makefile-Change-COUNTER_FREQ-to-100-MHz.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0017-PSCI-Apply-flush-cache-after-setting-branch_data.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0018-PSCI-Add-function-call-entry-point.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0019-lds-Rearrange-and-mark-the-sections.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0020-common-Provide-firmware-info-using-libfdt.patch delete mode 100644 meta-arm-bsp/recipes-bsp/boot-wrapper-aarch64/files/fvp-baser-aemv8r64/0021-boot-Enable-firmware-node-initialization.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0001-armv8-Add-ARMv8-MPU-configuration-logic.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0002-vexpress64-add-MPU-memory-map-for-the-BASER_FVP.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0003-armv8-Allow-disabling-exception-vectors-on-non-SPL-b.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0004-armv8-ARMV8_SWITCH_TO_EL1-improvements.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0005-armv8-Make-disabling-HVC-configurable-when-switching.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0006-vexpress64-Do-not-set-COUNTER_FREQUENCY.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0007-vexpress64-Enable-LIBFDT_OVERLAY-in-the-vexpress_aem.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0008-armv8-Allow-PRBAR-MPU-attributes-to-be-configured.patch delete mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/fvp-baser-aemv8r64/0009-armv8-Enable-icache-when-switching-exception-levels-.patch delete mode 100644 meta-arm-bsp/recipes-kernel/linux/arm-platforms-kmeta/bsp/arm-platforms/fvp-baser-aemv8r64-preempt-rt.scc delete mode 100644 meta-arm-bsp/recipes-kernel/linux/arm-platforms-kmeta/bsp/arm-platforms/fvp-baser-aemv8r64-standard.scc delete mode 100644 meta-arm-bsp/recipes-kernel/linux/arm-platforms-kmeta/bsp/arm-platforms/fvp-baser-aemv8r64.scc delete mode 100644 meta-arm-bsp/recipes-kernel/linux/files/fvp-baser-aemv8r64/fvp-baser-aemv8r64.dts delete mode 100644 meta-arm/recipes-devtools/fvp/fvp-base-r-aem_11.22.14.bb