On Tue, Nov 22, 2016 at 07:41:09PM +0800, Peng Fan wrote:
> Before disable cache, need to first flush cache.
>
> There maybe dirty data in D-Cache before disable D-Cache.
> After disable D-Cache, the first store instructions in
> psci_v7_flush_dcache_all will directly store registers
> {r4-r5, r7, r9-r11, lr} to memory.
> If there is dirty data before disable D-Cache,
> psci_v7_flush_dcache_all will flush data to memory,
> and may overwrite the memory that hold the registers
> {r4-r5, r7, r9-r11, lr}.
>
> So before disable cache, first flush D-Cache.
>
> Signed-off-by: Peng Fan <[email protected]>
> Cc: Albert Aribaud <[email protected]>
> Cc: Chen-Yu Tsai <[email protected]>
> Cc: Hans de Goede <[email protected]>
> Cc: Hongbo Zhang <[email protected]>
> Cc: York Sun <[email protected]>
> Cc: Marc Zyngier <[email protected]>
> Cc: Tom Rini <[email protected]>Applied to u-boot/master, thanks! -- Tom
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