[U-Boot] [PATCH] arm: socfpga: fix CONFIG_SPL_MAX_SIZE (less than SRAM)
Marek Vasut
marex at denx.de
Tue May 15 09:14:59 UTC 2018
On 05/15/2018 09:14 AM, Simon Goldschmidt wrote:
>
>
> On 14.05.2018 23:03, Marek Vasut wrote:
>> On 05/14/2018 11:02 PM, Simon Goldschmidt wrote:
>>> The boot ROMs of the socfpga platform limit the size of the
>>> SPL to copy to less than the available SRAM.
>>> (See "Intel SoC FPGA Embedded Development Suite User Guide")
>>>
>>> According to this document, Cyclone V and Arria V allow 60KB
>>> maximum while Arria 10 allows 200KB. In both cases, this is
>>> less than CONFIG_SYS_INIT_RAM_SIZE.
>>
>> Do they really copy less ?
>
> Well, their own tool errors out if the binary is larger than this. And
> the documentation says the boot ROM needs some RAM, at least when
> copying from QSPI. And since the bootcounter stored at the end of SRAM
> sometimes survives a cold boot on one of my boards, they certainly don't
> always copy 64KB.
>
> In the end, I don't know how 'hard' that restriction is, but if they say
> so in the documentation, I think it's better to error out than to have a
> system that does not start any more...
Would it be too much to ask if you could poison the SRAM with some
pattern, trigger a cold reset and see how much of it got corrupted?
--
Best regards,
Marek Vasut
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