diff options
| author | Cédric Schieli | 2016-11-11 11:59:06 +0100 |
|---|---|---|
| committer | Tom Rini | 2016-11-21 14:07:31 -0500 |
| commit | 3e10fcde3f3c24a488866dd33fa3f5d46ff3d7a3 (patch) | |
| tree | 1e935b48349ce4dcab5f4644497b953303ba8969 | |
| parent | 83dd98e012b55b494ac2bf1f9a5d66f684bfbbe8 (diff) | |
arm: add save_boot_params for ARM1176
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>
| -rw-r--r-- | arch/arm/cpu/arm1176/start.S | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S index a602d4e6937..7c00201dd0a 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) |