diff options
Diffstat (limited to 'include/asm-mips/page.h')
-rw-r--r-- | include/asm-mips/page.h | 56 |
1 files changed, 35 insertions, 21 deletions
diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h index 5cae35cd9ba9..ee25a779bf49 100644 --- a/include/asm-mips/page.h +++ b/include/asm-mips/page.h @@ -87,35 +87,47 @@ static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, typedef struct { unsigned long pte; } pte_t; #define pte_val(x) ((x).pte) #endif +#define __pte(x) ((pte_t) { (x) } ) -typedef struct { unsigned long pmd; } pmd_t; -typedef struct { unsigned long pgd; } pgd_t; -typedef struct { unsigned long pgprot; } pgprot_t; +/* + * For 3-level pagetables we defines these ourselves, for 2-level the + * definitions are supplied by <asm-generic/pgtable-nopmd.h>. + */ +#ifdef CONFIG_64BIT +typedef struct { unsigned long pmd; } pmd_t; #define pmd_val(x) ((x).pmd) -#define pgd_val(x) ((x).pgd) -#define pgprot_val(x) ((x).pgprot) +#define __pmd(x) ((pmd_t) { (x) } ) -#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) +#endif -#define __pte(x) ((pte_t) { (x) } ) -#define __pmd(x) ((pmd_t) { (x) } ) +/* + * Right now we don't support 4-level pagetables, so all pud-related + * definitions come from <asm-generic/pgtable-nopud.h>. + */ + +/* + * Finall the top of the hierarchy, the pgd + */ +typedef struct { unsigned long pgd; } pgd_t; +#define pgd_val(x) ((x).pgd) #define __pgd(x) ((pgd_t) { (x) } ) + +/* + * Manipulate page protection bits + */ +typedef struct { unsigned long pgprot; } pgprot_t; +#define pgprot_val(x) ((x).pgprot) #define __pgprot(x) ((pgprot_t) { (x) } ) -/* Pure 2^n version of get_order */ -static __inline__ int get_order(unsigned long size) -{ - int order; - - size = (size-1) >> (PAGE_SHIFT-1); - order = -1; - do { - size >>= 1; - order++; - } while (size); - return order; -} +/* + * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd + * pair of pages we only have a single global bit per pair of pages. When + * writing to the TLB make sure we always have the bit set for both pages + * or none. This macro is used to access the `buddy' of the pte we're just + * working on. + */ +#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) #endif /* !__ASSEMBLY__ */ @@ -148,4 +160,6 @@ static __inline__ int get_order(unsigned long size) #define WANT_PAGE_VIRTUAL #endif +#include <asm-generic/page.h> + #endif /* _ASM_PAGE_H */ |