[PATCH v2 1/4] powerpc: Introduce local (non-broadcast) forms of tlb invalidates
Scott Wood
scottwood at freescale.com
Thu Sep 4 02:12:51 EST 2008
On Fri, Aug 29, 2008 at 08:56:50AM -0500, Kumar Gala wrote:
> +_GLOBAL(_tlbil_all)
> +#define MMUCSR0_TLBFI (MMUCSR0_TLB0FI | MMUCSR0_TLB1FI | \
> + MMUCSR0_TLB2FI | MMUCSR0_TLB3FI)
> + li r3,(MMUCSR0_TLBFI)@l
> + mtspr SPRN_MMUCSR0, r3
> +1:
> + mfspr r3,SPRN_MMUCSR0
> + andi. r3,r3,MMUCSR0_TLBFI at l
> + bne 1b
> + blr
> +
> +/*
> + * Flush MMU TLB for a particular process id, but only on the local processor
> + * (no broadcast)
> + */
> +_GLOBAL(_tlbil_pid)
> + li r3,(MMUCSR0_TLBFI)@l
> + mtspr SPRN_MMUCSR0, r3
> +1:
> + mfspr r3,SPRN_MMUCSR0
> + andi. r1,r2,MMUCSR0_TLBFI at l
> + bne 1b
> + blr
I'm guessing _tlbil_pid is never called, as it will clobber the stack
pointer.
Should probably just point both function names at the same implementation,
since PID-specific invalidation isn't supported on non-tlbilx cores.
-Scott
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