[U-Boot] [PATCH] arc: AXS101 - enable data cache

[Alexey Brodkin]

On Tue, 2015-03-31 at 13:20 +0300, Alexey Brodkin wrote:
> With recent changes in mother-board firmware DMA works properly with
> data cache enabled. So we enable data cache for the board in defconfig
> to gain significant improvement in performance.

Even though NAND controller seem to work fine now I discovered yet
unknown problem with class 10 SD cards. If data cache is enabled I see
error messages like "Invalid FAT entry". Once data cache is disabled I
see very nice and clean reads:
--->8---
AXS# fatload mmc 0 0x83000000 uimage
reading uimage
7354948 bytes read in 315 ms (22.3 MiB/s)
--->8---

So before enabling data cache on AXS101 I'll need to fix this issue with
SD-cards. Deferring this patch for now.

-Alexey