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