From 3e10fcde3f3c24a488866dd33fa3f5d46ff3d7a3 Mon Sep 17 00:00:00 2001 From: Cédric Schieli Date: Fri, 11 Nov 2016 11:59:06 +0100 Subject: 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 Acked-by: Stephen Warren --- arch/arm/cpu/arm1176/start.S | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch') diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S index a602d4e693..7c00201dd0 100644 --- a/arch/arm/cpu/arm1176/start.S +++ b/arch/arm/cpu/arm1176/start.S @@ -16,6 +16,7 @@ #include #include +#include #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) -- cgit