| From 3e10fcde3f3c24a488866dd33fa3f5d46ff3d7a3 Mon Sep 17 00:00:00 2001 |
| From: =?UTF-8?q?C=C3=A9dric=20Schieli?= <cschieli@gmail.com> |
| Date: Fri, 11 Nov 2016 11:59:06 +0100 |
| Subject: [PATCH] arm: add save_boot_params for ARM1176 |
| MIME-Version: 1.0 |
| Content-Type: text/plain; charset=UTF-8 |
| Content-Transfer-Encoding: 8bit |
| |
| Implement a hook to allow boards to save boot-time CPU state for later |
| use. When U-Boot is chain-loaded by another bootloader, CPU registers may |
| contain useful information such as system configuration information. This |
| feature mirrors the equivalent ARMv7 feature. |
| |
| Signed-off-by: Cédric Schieli <cschieli@gmail.com> |
| Acked-by: Stephen Warren <swarren@nvidia.com> |
| Signed-off-by: Paul Barker <paul@paulbarker.me.uk> |
| Upstream-status: Backport |
| --- |
| arch/arm/cpu/arm1176/start.S | 10 ++++++++++ |
| 1 file changed, 10 insertions(+) |
| |
| diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S |
| index a602d4e..7c00201 100644 |
| --- a/arch/arm/cpu/arm1176/start.S |
| +++ b/arch/arm/cpu/arm1176/start.S |
| @@ -16,6 +16,7 @@ |
| |
| #include <asm-offsets.h> |
| #include <config.h> |
| +#include <linux/linkage.h> |
| |
| #ifndef CONFIG_SYS_PHY_UBOOT_BASE |
| #define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE |
| @@ -37,6 +38,11 @@ |
| .globl reset |
| |
| reset: |
| + /* Allow the board to save important registers */ |
| + b save_boot_params |
| +.globl save_boot_params_ret |
| +save_boot_params_ret: |
| + |
| /* |
| * set the cpu to SVC32 mode |
| */ |
| @@ -110,3 +116,7 @@ mmu_disable_phys: |
| c_runtime_cpu_setup: |
| |
| mov pc, lr |
| + |
| +WEAK(save_boot_params) |
| + b save_boot_params_ret /* back to my caller */ |
| +ENDPROC(save_boot_params) |
| -- |
| 2.1.4 |
| |