[U-Boot] [PATCH] mtd: nand: mxs: fix cache alignment for cache lines >32

[Simon Glass]

Hi,

On 3 August 2016 at 12:29, Fabio Estevam <festevam at gmail.com> wrote:
> Hi Tom,
>
> On Wed, Aug 3, 2016 at 3:09 PM, Tom Rini <trini at konsulko.com> wrote:
>
>> I feel like we must have done something wrong of late, can you bisect
>> when these came in?  Thanks!
>
> This cache warnings start to appear since commit:
>
> commit bcc53bf095893fbdae531a9a7b5d4ef4a125a7fc
> Author: Simon Glass <sjg at chromium.org>
> Date:   Sun Jun 19 19:43:05 2016 -0600
>
>     arm: Show cache warnings in U-Boot proper only
>
>     Avoid bloating the SPL image size.
>
>     Signed-off-by: Simon Glass <sjg at chromium.org>
>
> Prior to this commit the cache warnings would be printed only with
> DEBUG enabled. Now they are always enabled when we build a non-spl
> target.
>
> We could restore the original behavior and also keep Simon's intention
> of not bloating the SPL image size with the following change:
>
> --- a/arch/arm/lib/cache.c
> +++ b/arch/arm/lib/cache.c
> @@ -60,10 +60,11 @@ int check_cache_range(unsigned long start, unsigned long sto
>         if (stop & (CONFIG_SYS_CACHELINE_SIZE - 1))
>                 ok = 0;
>
> -       if (!ok) {
> -               warn_non_spl("CACHE: Misaligned operation at range [%08lx, %08lx
> -                            start, stop);
> -       }
> +#ifndef CONFIG_SPL_BUILD
> +       if (!ok)
> +               debug("CACHE: Misaligned operation at range [%08lx, %08lx]\n",
> +                     start, stop);
> +#endif
>
>         return ok;
>  }
>
> If this looks OK, I can submit a formal patch.

Actually I think these are bugs and should be fixed. In this case,
from what I can tell netboot_common() should cache-align the size in
the call to:

/* flush cache */
flush_cache(load_addr, size);

Regards,
Simon