[U-Boot] [PATCH v2 0/5] Enable caches for the RPi2

[Stephen Warren]

On 03/17/2016 01:58 AM, Alexander Graf wrote:
>
>
> On 17.03.16 05:26, Stephen Warren wrote:
>> On 03/16/2016 08:41 AM, Alexander Graf wrote:
>>> This patch set converts the Raspberry Pi 2 system to properly make use of
>>> the caches available in it.
>>>
>>> Because we're running in HYP mode, we first need to teach U-Boot how to
>>> make use of HYP registers and the LPAE page layout which is mandated by
>>> hardware when running in HYP mode.
>>>
>>> Then while we're at it, also mark the frame buffer cached to speed up
>>> screen updates.
>>>
>>> With this patch set, my Raspberry Pi 3 running in AArch32 mode is a *lot*
>>> faster than without.
>>>
>>> Please verify that the code works on a RPi2 as well and doesn't break the
>>> original Pi. In theory it should work, but I only have a 3 to test on
>>> available here.
>>
>> This series mostly works OK. I found the following results, with my
>> rpi_dev branch on github if you want to test the exact same commits:
>>
>> RPi B+ (running rpi_1 build):
>> - Very minor transient corruption when running "ls mmc 0:2 /etc"
>>
>> RPi 2 (running rpi_2 build):
>> RPi 3 (booting in 32-bit mode and running rpi_2 build):
>> RPi 3 (booting in 32-bit mode and running rpi_3_32b build):
>> - Obvious transient corruption when running "ls mmc 0:2 /etc"
>>
>> RPi 3 (booting in 64-bit mode and running rpi_3 build):
>> - No issues
...
> Ugh. It helps when you get the parameters for ALIGN() correctly.
>
> Please just squash the patch below into the last patch, then things
> should work fine. If you like I can resend a v3, but I guess the change
> is small enough?

With that fix squashed in, the series,
Tested-by: Stephen Warren <swarren at wwwdotorg.org>

(You probably want to Cc Tom Rini on the revised patches since he 
applies ARM board patches these days.)