On 06/11/2015 01:24, Andrew Jones wrote:
> From: Alex Bennée <alex.bennee@xxxxxxxxxx>
>
> This introduces a new flush_tlb_page function which does exactly what
> you expect. It's going to be useful for the future TLB torture test.
>
> Signed-off-by: Alex Bennée <alex.bennee@xxxxxxxxxx>
> Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
> ---
> lib/arm/asm/mmu.h | 11 +++++++++++
> lib/arm64/asm/mmu.h | 8 ++++++++
> 2 files changed, 19 insertions(+)
>
> diff --git a/lib/arm/asm/mmu.h b/lib/arm/asm/mmu.h
> index c1bd01c9ee1b9..2bb0cde820f8a 100644
> --- a/lib/arm/asm/mmu.h
> +++ b/lib/arm/asm/mmu.h
> @@ -14,8 +14,11 @@
> #define PTE_AF PTE_EXT_AF
> #define PTE_WBWA L_PTE_MT_WRITEALLOC
>
> +/* See B3.18.7 TLB maintenance operations */
> +
> static inline void local_flush_tlb_all(void)
> {
> + /* TLBIALL */
> asm volatile("mcr p15, 0, %0, c8, c7, 0" :: "r" (0));
> dsb();
> isb();
> @@ -27,6 +30,14 @@ static inline void flush_tlb_all(void)
> local_flush_tlb_all();
> }
>
> +static inline void flush_tlb_page(unsigned long vaddr)
> +{
> + /* TLBIMVAA */
> + asm volatile("mcr p15, 0, %0, c8, c7, 3" :: "r" (vaddr));
> + dsb();
> + isb();
> +}
> +
> #include <asm/mmu-api.h>
>
> #endif /* __ASMARM_MMU_H_ */
> diff --git a/lib/arm64/asm/mmu.h b/lib/arm64/asm/mmu.h
> index 18b4d6be18fae..3bc31c91c36f8 100644
> --- a/lib/arm64/asm/mmu.h
> +++ b/lib/arm64/asm/mmu.h
> @@ -19,6 +19,14 @@ static inline void flush_tlb_all(void)
> isb();
> }
>
> +static inline void flush_tlb_page(unsigned long vaddr)
> +{
> + unsigned long page = vaddr >> 12;
> + dsb(ishst);
> + asm("tlbi vaae1is, %0" :: "r" (page));
> + dsb(ish);
> +}
> +
> #include <asm/mmu-api.h>
>
> #endif /* __ASMARM64_MMU_H_ */
>
Applied, thanks.
Paolo
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