diff options
Diffstat (limited to 'arch/arm/mm/mm.h')
| -rw-r--r-- | arch/arm/mm/mm.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h index 70f6d3ea483..27f4a619b35 100644 --- a/arch/arm/mm/mm.h +++ b/arch/arm/mm/mm.h @@ -3,7 +3,31 @@ /* the upper-most page table pointer */ extern pmd_t *top_pmd; -#define TOP_PTE(x) pte_offset_kernel(top_pmd, x) +/* + * 0xffff8000 to 0xffffffff is reserved for any ARM architecture + * specific hacks for copying pages efficiently, while 0xffff4000 + * is reserved for VIPT aliasing flushing by generic code. + * + * Note that we don't allow VIPT aliasing caches with SMP. + */ +#define COPYPAGE_MINICACHE 0xffff8000 +#define COPYPAGE_V6_FROM 0xffff8000 +#define COPYPAGE_V6_TO 0xffffc000 +/* PFN alias flushing, for VIPT caches */ +#define FLUSH_ALIAS_START 0xffff4000 + +static inline void set_top_pte(unsigned long va, pte_t pte) +{ + pte_t *ptep = pte_offset_kernel(top_pmd, va); + set_pte_ext(ptep, pte, 0); + local_flush_tlb_kernel_page(va); +} + +static inline pte_t get_top_pte(unsigned long va) +{ + pte_t *ptep = pte_offset_kernel(top_pmd, va); + return *ptep; +} static inline pmd_t *pmd_off_k(unsigned long virt) { |