[U-Boot] how does board_init_f() -> board_init_r?

[Peter Chen]

Oh I see. Thanks.

On Tue, Feb 16, 2016 at 8:41 AM, Stephen Warren <swarren at wwwdotorg.org>
wrote:

> On 02/16/2016 09:01 AM, Simon Glass wrote:
>
>> +Stephen who will know more
>>
>> Hi,
>>
>> On 13 February 2016 at 18:52, quantumlight <peter.feifan.chen at gmail.com>
>> wrote:
>>
>>> I am trying to modify the bootloader code for NVIDIA's jetson board.
>>>
>>> So I am looking at crt0.S. It seems that two builds happen, one with
>>> CONFIG_SPL_BUILD and one without. So you end up with two file, u-boot.bin
>>> and spl/u-boot-spl.bin.
>>>
>>
>> SPL is built with ARMv4t
>> U-Boot proper is built with ARMv7
>>
>> That's why SPL is used on Tegra. The SPL does not actually load
>> U-Boot. In fact both are bundle together and loaded at the same time.
>> SPL simply jumps to U-Boot when needed.
>>
>
> There's some more background on this topic at:
>
> ftp://download.nvidia.com/tegra-public-appnotes/index.html
>
> In particular, see the "Tegra Boot Flow" link/document.
>