Hi
2016-06-12 11:56 GMT+08:00 Ziyuan Xu xzy.xu@rock-chips.com:
If we would like to boot from SD card, we have to implement mmc driver in SPL stage, and get a slightly larger spl binrary. RK3288's bootrom code has the ability to load spl and u-boot. This patch tasks maskrom to load u-boot.
Loading sequence after rework: bootrom ==> spl ==> bootrom ==> u-boot
Signed-off-by: Ziyuan Xu xzy.xu@rock-chips.com
arch/arm/mach-rockchip/rk3288/save_boot_param.S | 32 +++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 arch/arm/mach-rockchip/rk3288/save_boot_param.S
diff --git a/arch/arm/mach-rockchip/rk3288/save_boot_param.S b/arch/arm/mach-rockchip/rk3288/save_boot_param.S new file mode 100644 index 0000000..778ec83 --- /dev/null +++ b/arch/arm/mach-rockchip/rk3288/save_boot_param.S @@ -0,0 +1,32 @@ +/*
- (C) Copyright 2015 Google, Inc
Should be "Copyright 2016 Rockchip Electronics Co., Ltd"
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <linux/linkage.h>
+.globl SAVE_SP_ADDR +SAVE_SP_ADDR:
.word 0+/*
- void save_boot_params
- Save sp, lr, r1~r12
- */
+ENTRY(save_boot_params)
push {r1-r12, lr}ldr r0, =SAVE_SP_ADDRstr sp, [r0]b save_boot_params_ret @ back to my caller+ENDPROC(save_boot_params)
+.globl back_to_bootrom +ENTRY(back_to_bootrom)
ldr r0, =SAVE_SP_ADDRldr sp, [r0]mov r0, #0pop {r1-r12, pc}+ENDPROC(back_to_bootrom)
1.9.1