diff options
Diffstat (limited to 'arch/powerpc/include/asm/highmem.h')
| -rw-r--r-- | arch/powerpc/include/asm/highmem.h | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/highmem.h b/arch/powerpc/include/asm/highmem.h index 91c589520c0a..04e4a620952e 100644 --- a/arch/powerpc/include/asm/highmem.h +++ b/arch/powerpc/include/asm/highmem.h @@ -38,9 +38,24 @@ extern pte_t *pkmap_page_table; * easily, subsequent pte tables have to be allocated in one physical * chunk of RAM. */ -#define LAST_PKMAP (1 << PTE_SHIFT) -#define LAST_PKMAP_MASK (LAST_PKMAP-1) +/* + * We use one full pte table with 4K pages. And with 16K/64K pages pte + * table covers enough memory (32MB and 512MB resp.) that both FIXMAP + * and PKMAP can be placed in single pte table. We use 1024 pages for + * PKMAP in case of 16K/64K pages. + */ +#ifdef CONFIG_PPC_4K_PAGES +#define PKMAP_ORDER PTE_SHIFT +#else +#define PKMAP_ORDER 10 +#endif +#define LAST_PKMAP (1 << PKMAP_ORDER) +#ifndef CONFIG_PPC_4K_PAGES +#define PKMAP_BASE (FIXADDR_START - PAGE_SIZE*(LAST_PKMAP + 1)) +#else #define PKMAP_BASE ((FIXADDR_START - PAGE_SIZE*(LAST_PKMAP + 1)) & PMD_MASK) +#endif +#define LAST_PKMAP_MASK (LAST_PKMAP-1) #define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT) #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) @@ -85,7 +100,7 @@ static inline void *kmap_atomic_prot(struct page *page, enum km_type type, pgpro BUG_ON(!pte_none(*(kmap_pte-idx))); #endif __set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot)); - flush_tlb_page(NULL, vaddr); + local_flush_tlb_page(NULL, vaddr); return (void*) vaddr; } @@ -113,7 +128,7 @@ static inline void kunmap_atomic(void *kvaddr, enum km_type type) * this pte without first remap it */ pte_clear(&init_mm, vaddr, kmap_pte-idx); - flush_tlb_page(NULL, vaddr); + local_flush_tlb_page(NULL, vaddr); #endif pagefault_enable(); } |