[U-Boot] [PATCH 10/10] ARM: socfpga: arria10: add support for building Arria10

Dinh Nguyen
2015-11-23T22:50:15Z

On 11/23/2015 04:46 PM, Marek Vasut wrote:
> On Monday, November 23, 2015 at 11:32:27 PM, Dinh Nguyen wrote:
> [...]
>>>>>> The main point is that we need to program the FPGA
>>>>>> during U-Boot booting up with a ~>10 MB rbf file while being limited
>>>>>> to the OCRAM's size. I would like to contain this ugliness in it's
>>>>>> own directory.
>>>>>
>>>>> What's the problem with this ? We already support loading files from
>>>>> storage in SPL, so just compile the FPGA manager into SPL as well and
>>>>> use it.
>>>>
>>>> Ok, let me re-work it all under the c5/a5 directory. Thanks for
>>>> reviewing.
>>>
>>> But you didn't really answer my question -- what is the problem with the
>>> FPGA loader in SPL ?
>>
>> I thought you've already answered your own question. For whatever
>> reason, the downstream A10 is re-doing the FPGA manager just for this
>> purpose.
>
> Could the reason be that the FPGA manager in it's current state expects one big
> buffer with the entire FPGA bitstream ? When you're in SPL and you still don't
> have DRAM running, you cannot create such buffer anywhere. Thus, what you need
> to do is to have some sort of code which loads a bit of the bitstream file at
> time and feeds it into the FPGA manager, piece by piece. This should be doable
> pretty easily, what do you think ?
>

That's exactly what is being in the mach-socfpga directory. Yes, but
should that code go into mach-socfpga or drivers?

Dinh