[U-Boot] [PATCH] powerpc mpc85xx: Do not protect TLB entry for debuggging in AS1 against invalidation

Scott Wood scottwood at freescale.com
Fri Sep 7 21:50:08 CEST 2012


On 09/07/2012 07:50 AM, Joye Laurent wrote:
> In case of booting from RAM (CONFIG_SYS_RAMBOOT), a TLB entry is created
> for IVPR + IVOR15 to map on valid OP code address.
> This TLB entry shall not be protected against invalidation, because
> a new TLB entry to access RAM in AS0 will be created by
> cpu_init_early_f.
> If this TLB entry is protected against invalidation, this will creates
> 2 TLB for the same address range (forbidden).

Instead we should explicitly remove the debug TLB when it is no longer
needed.

-Scott




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