[U-Boot] [PATCH] arm: socfpga: fix CONFIG_SPL_MAX_SIZE (less than SRAM)

[Simon Goldschmidt]

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...

Simon