[U-Boot] [PATCH] rockchip: rk3288: Change method of loading u-boot

[Eddie Cai]

Why not move arch/arm/mach-rockchip/rk3036/save_boot_param.S to
arch/arm/mach-rockchip/save_boot_param.S. Then use it directly?

2016-06-12 12:29 GMT+08:00 Eddie Cai <eddie.cai at rock-chips.com>:
>
> Hi
>
> 2016-06-12 11:56 GMT+08:00 Ziyuan Xu <xzy.xu at 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 at 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
>>
>>
>>
>
>
>
> --
> Eddie




-- 
Eddie