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_ADDR
  

•   str     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_ADDR
  

•   ldr     sp, [r0]
  

•   mov     r0, #0
  

•   pop     {r1-r12, pc}
  

+ENDPROC(back_to_bootrom)

1.9.1