[U-Boot] [PATCH 1/2] integratorap: disable dcache

[Wolfgang Denk]

Dear Linus Walleij,

In message <1310598267-9711-1-git-send-email-linus.walleij at linaro.org> you wrote:
> The Integrator AP with CM920T (ARM920T) does not boot without
> D-cache disabled throughout, the actual problem comes at "bootm",
> at this point U-Boot tries to disable D-cache which doesn't work
> on this machine for some reason. The result is usually an
> illegal instruction trap or similar as the PC goes astray in
> memory and crash something like this:
> 
>  undefined instruction
>  pc : [<01ff1c44>]          lr : [<01fd8430>]
>  sp : 01fa7e08  ip : 01fa7dc0     fp : 00000000
>  r10: 01fef318  r9 : 00000015     r8 : 01fa7f70
>  r7 : 00000015  r6 : 00008000     r5 : 01fa7fe8  r4 : 00000000
>  r3 : 01fef380  r2 : 01fef8b0     r1 : ffffffff  r0 : fffffffe
>  Flags: Nzcv  IRQs off  FIQs off  Mode SVC_32
>  Resetting CPU ...
> 
> Disabling D-cache brings the board support to a working state that
> can boot the Linux kernel.
> 
> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
> ---
>  include/configs/integratorap.h |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)

Sorry, but again I have to point out that I really dislike papering
over existing bugs.  If the disable D-cache in bootm does not work,
_this_ should be analyzed and fixed instead of globally disabling he
data cache.

NAK.

Best regards,

Wolfgang Denk

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