[U-Boot] [PATCH 0/4] Ability to load linux kernel on rock2 RK3288

[Sandy Patterson]

I did a little more on this, and talked to someone else here. It seems that
my problem with loading the kernel including these patches is specific to
our kernel and after applying a local patch we have, it appears to load
fine.

So this patchset gets me back to the same functionality in v2016.03.

We're left with the puzzle of what's wrong on the RK3288 regarding caching
and memory.

Sandy Patterson

On Mon, Jul 11, 2016 at 1:38 PM, Sandy Patterson <apatterson at sightlogix.com>
wrote:

> I wasn't able to load the linux kernel using a Rock2 board
> using the latest master branch. The board hangs after it has
> handed executing over to the kernel. I found that the latest release
> that worked was v2016.03.
>
> I did some searching and I suspect the problem may be cache related.
>
> This patchset allows the kernel to start by reverting two problem
> commits and disabling EFI_LOADER which I suspect rubs the caching the
> wrong way. We also found that the 512M limit for fdt and initrd is now
> 256M.
> I'm not sure why this is.
>
> This still doesn't work 100%. I think it's not initializing the SD card
> volages correctly, but at least the Kernel is loading.
>
> I also am not sure changing the caching for all armv7 is the right
> answer. I wasn't too sure about the revert. I am not very familiar with
> this low level stuff.
>
> Sandy Patterson
>
>
> Sandy Patterson (4):
>   Revert "arm: Replace v7_maint_dcache_all(ARMV7_DCACHE_CLEAN_INVAL_ALL)
>     with asm code"
>   Revert "arm: Replace v7_maint_dcache_all(ARMV7_DCACHE_INVAL_ALL) with
>     asm code"
>   Disable CONFIG_EFI_LOADER for rock2.
>   RK3288 needs fdt and initrd below 256M now.
>
>  arch/arm/cpu/armv7/Makefile                  |   2 +-
>  arch/arm/cpu/armv7/cache_v7.c                | 135 ++++++++++++++++++++++-
>  arch/arm/cpu/armv7/cache_v7_asm.S            | 154
> ---------------------------
>  arch/arm/mach-uniphier/arm32/lowlevel_init.S |  67 +++++++++++-
>  configs/rock2_defconfig                      |   1 +
>  include/configs/rk3288_common.h              |   6 +-
>  6 files changed, 201 insertions(+), 164 deletions(-)
>  delete mode 100644 arch/arm/cpu/armv7/cache_v7_asm.S
>
> --
> 1.9.1
>
>