diff options
Diffstat (limited to 'arch/arm/mach-mvebu/lowlevel_spl.S')
| -rw-r--r-- | arch/arm/mach-mvebu/lowlevel_spl.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mach-mvebu/lowlevel_spl.S b/arch/arm/mach-mvebu/lowlevel_spl.S index dde77b7652..501c239e9d 100644 --- a/arch/arm/mach-mvebu/lowlevel_spl.S +++ b/arch/arm/mach-mvebu/lowlevel_spl.S @@ -3,6 +3,15 @@ #include <config.h> #include <linux/linkage.h> +/* + * BootROM loads the header part of kwbimage into L2 cache. BIN header usually + * contains U-Boot SPL, optionally it can also contain additional arguments. + * The number of these arguments is in r0, pointer to the argument array in r1. + * BootROM expects executable BIN header code to return to address stored in lr. + * Other registers (r2 - r12) must be preserved. We save all registers to + * CONFIG_SPL_BOOTROM_SAVE address. BIN header arguments (passed via r0 and r1) + * are currently not used by U-Boot SPL binary. + */ ENTRY(save_boot_params) stmfd sp!, {r0 - r12, lr} /* @ save registers on stack */ ldr r12, =CONFIG_SPL_BOOTROM_SAVE |