[U-Boot] [PATCH v2 3/7] stm32: stm32f7: add spl build support

[Vikas Manocha]

Hi Robert,

On 08/10/2017 11:03 AM, Robert Nelson wrote:
> Hi Vikas,
> 
> On Sun, May 28, 2017 at 2:55 PM, Vikas Manocha <vikas.manocha at st.com> wrote:
>> This commit supports booting from stm32 internal nor flash. spl U-Boot
>> initializes the sdram memory, copies next image (e.g. standard U-Boot)
>> to sdram & then jumps to entry point.
>>
>> Here are the flash memory addresses for U-Boot-spl & standard U-Boot:
>>         - spl U-Boot            : 0x0800_0000
>>         - standard U-Boot       : 0x0800_8000
> 
> Is there another patchset missing on mainline for booting via spl?

No, you just need to flash spl & next image at above mentioned addresses. By default spl expects kernel image. 

To boot u-boot, press keyboard character 'c'.
you might need to keep on pressing 'c' it for some time as the keyboard entry acceptance & detection window is very small.

Cheers,
Vikas

> 
> on mainline with the stm32f746-disco board:
> 
> U-Boot SPL 2017.09-rc1-00177-gd529124fdc (Aug 10 2017 - 12:33:35)
> Trying to boot from XIP
> Hard fault
> pc : 08008008    lr : 08000adb    xPSR : 21000000
> r12 : 2004f338   r3 : 00000005    r2 : 081c0000
> r1 : ffffff9a    r0 : 00000000
> Resetting CPU ...
> 
> resetting ...
> 
> I'm using openocd to program
> 
> openocd -f board/stm32f7discovery.cfg \
>   -c "init" \
>   -c "reset init" \
>   -c "flash probe 0" \
>   -c "flash write_image erase ./spl/u-boot-spl.bin 0x08000000" \
>   -c "flash write_image erase ./u-boot.img 0x08008000" \
>   -c "reset run" \
>   -c "shutdown"
> 
> Regards,
>