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064aa0a388
A patch is backported to check if the firmware loaded a device tree blob into memory and set the fdt_addr variable if it is found. The U-Boot script will then read the command line arguments generated by the firmware from the device tree and boot the kernel with the command line arguments and the loaded device tree. This allows things like MAC address, board revision and serial number to be correctly configured and options in config.txt to be used. An additional patch is backported and further changes are made to support this. Signed-off-by: Jonathan Liu <net147@gmail.com> Signed-off-by: Paul Barker <paul@paulbarker.me.uk>
57 lines
1.6 KiB
Diff
57 lines
1.6 KiB
Diff
From 3e10fcde3f3c24a488866dd33fa3f5d46ff3d7a3 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?C=C3=A9dric=20Schieli?= <cschieli@gmail.com>
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Date: Fri, 11 Nov 2016 11:59:06 +0100
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Subject: [PATCH] arm: add save_boot_params for ARM1176
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Implement a hook to allow boards to save boot-time CPU state for later
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use. When U-Boot is chain-loaded by another bootloader, CPU registers may
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contain useful information such as system configuration information. This
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feature mirrors the equivalent ARMv7 feature.
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Signed-off-by: Cédric Schieli <cschieli@gmail.com>
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Acked-by: Stephen Warren <swarren@nvidia.com>
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Signed-off-by: Paul Barker <paul@paulbarker.me.uk>
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Upstream-status: Backport
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---
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arch/arm/cpu/arm1176/start.S | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
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index a602d4e..7c00201 100644
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--- a/arch/arm/cpu/arm1176/start.S
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+++ b/arch/arm/cpu/arm1176/start.S
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@@ -16,6 +16,7 @@
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#include <asm-offsets.h>
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#include <config.h>
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+#include <linux/linkage.h>
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#ifndef CONFIG_SYS_PHY_UBOOT_BASE
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#define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE
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@@ -37,6 +38,11 @@
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.globl reset
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reset:
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+ /* Allow the board to save important registers */
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+ b save_boot_params
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+.globl save_boot_params_ret
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+save_boot_params_ret:
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+
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/*
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* set the cpu to SVC32 mode
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*/
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@@ -110,3 +116,7 @@ mmu_disable_phys:
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c_runtime_cpu_setup:
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mov pc, lr
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+
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+WEAK(save_boot_params)
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+ b save_boot_params_ret /* back to my caller */
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+ENDPROC(save_boot_params)
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--
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2.1.4
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