[U-Boot] SUNXI: A64: Increase SPL size

[Jagan Teki]

On Thu, Nov 9, 2017 at 5:48 PM, Andre Przywara <andre.przywara at arm.com> wrote:
> Hi,
>
> On 09/11/17 12:11, Maxime Ripard wrote:
>> On Thu, Nov 09, 2017 at 01:29:21AM +0530, Jagan Teki wrote:
>>> Hi,
>>>
>>> I'm trying to increase SPL size to 64K(with SRAM A2), so-that SPL can
>>> able to fit new features like falcon. I knew the limit about 32K but
>>> page[1] stating that we can use approximately 192 KiB of contiguous
>>> SRAM.
>>>
>>> eGON.BT0 has limit of reading 32KB, Can't we use > 32KB SPL here?
>>> because I've tried with 64K SPL size with existing SPL code and was
>>> able to boot, but with increasing SPL by enabling falcon seems like
>>> BROM unable read eGON.BT0 which eventually booting failed. Any inputs?
>>
>> I've been able to use the falcon mode without this change on an A33,
>> what's so different about the A64?
>
> That the SPL is bigger in AArch64 and enabling SPL_OS_BOOT will probably
> exceed 32KB (we are quite close already)

Yes, but with arm32 I didn't see increasing size with SPL_OS_BOOT on
H3 spl/sunxi-spl.bin size become 24576(24KB) even with falcon-enabled.
of-course Linux failed to boot. Maxime did you find similar behaviour?
is falcon worked on A33?

>
> Jagan: you could try this branch of mine [1], this enables a 32-bit SPL,
> which is smaller than the AArch64 version.
> You might be able to include Falcon there, but I am afraid you have to
> work out how to boot a 64-bit kernel from there and how to enable SMP.

Thanks, let me try this.

thanks!
-- 
Jagan Teki
Free Software Engineer | www.openedev.com
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.