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

[Bo Shen]

Hi Vikas,
   Try to remove this magic (press 'c' on the keyboard when at the boot 
time), I'd suggest to add a follow-up patch to move all the selected SPL 
related configuration from "arch/arm/mach-stm32/Kconfig" under STM32F7 
to default configuration file (stm32f746-disco_defconfig). Then if the 
people want just boot up u-boot itself, what they need to do is just run 
"make menuconfig" and then de-select "Activate Falcon Mode" 
(SPL_OS_BOOT). Then everything will be fine.

   Thanks.

Best Regards,
Bo Shen

On 08/10/2017 11:36 AM, Robert Nelson wrote:
> On Thu, Aug 10, 2017 at 1:10 PM, Vikas Manocha <vikas.manocha at st.com> wrote:
>> One other point,
>>
>> On 08/10/2017 11:07 AM, Vikas Manocha wrote:
>>> 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" \
>> it should be u-boot-dtb.bin.
> Bingo!
>
> Thanks Vikas!!
>
> U-Boot SPL 2017.09-rc1-00177-gd529124fdc (Aug 10 2017 - 12:33:35)
> Trying to boot from XIP
>
>
> U-Boot 2017.09-rc1-00177-gd529124fdc (Aug 10 2017 - 12:33:35 -0500)
>
> Model: STMicroelectronics STM32F746-DISCO board
> DRAM:  8 MiB
> Flash: 1 MiB
> Using default environment
>
> In:    serial at 40011000
> Out:   serial at 40011000
> Err:   serial at 40011000
> usr button is at LOW LEVEL
> Net:
> Warning: ethernet at 40028000 (eth0) using random MAC address - 02:4a:de:c3:c8:80
> eth0: ethernet at 40028000
> Hit SPACE in 3 seconds to stop autoboot.
> U-Boot >
>
> Regards,
>