diff options
Diffstat (limited to 'arch/powerpc/include/asm/pgtable-be-types.h')
-rw-r--r-- | arch/powerpc/include/asm/pgtable-be-types.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgtable-be-types.h b/arch/powerpc/include/asm/pgtable-be-types.h new file mode 100644 index 000000000000..e2bf208605b1 --- /dev/null +++ b/arch/powerpc/include/asm/pgtable-be-types.h @@ -0,0 +1,92 @@ +#ifndef _ASM_POWERPC_PGTABLE_BE_TYPES_H +#define _ASM_POWERPC_PGTABLE_BE_TYPES_H + +#include <asm/cmpxchg.h> + +/* PTE level */ +typedef struct { __be64 pte; } pte_t; +#define __pte(x) ((pte_t) { cpu_to_be64(x) }) +static inline unsigned long pte_val(pte_t x) +{ + return be64_to_cpu(x.pte); +} + +static inline __be64 pte_raw(pte_t x) +{ + return x.pte; +} + +/* PMD level */ +#ifdef CONFIG_PPC64 +typedef struct { __be64 pmd; } pmd_t; +#define __pmd(x) ((pmd_t) { cpu_to_be64(x) }) +static inline unsigned long pmd_val(pmd_t x) +{ + return be64_to_cpu(x.pmd); +} + +static inline __be64 pmd_raw(pmd_t x) +{ + return x.pmd; +} + +/* + * 64 bit hash always use 4 level table. Everybody else use 4 level + * only for 4K page size. + */ +#if defined(CONFIG_PPC_BOOK3S_64) || !defined(CONFIG_PPC_64K_PAGES) +typedef struct { __be64 pud; } pud_t; +#define __pud(x) ((pud_t) { cpu_to_be64(x) }) +static inline unsigned long pud_val(pud_t x) +{ + return be64_to_cpu(x.pud); +} +#endif /* CONFIG_PPC_BOOK3S_64 || !CONFIG_PPC_64K_PAGES */ +#endif /* CONFIG_PPC64 */ + +/* PGD level */ +typedef struct { __be64 pgd; } pgd_t; +#define __pgd(x) ((pgd_t) { cpu_to_be64(x) }) +static inline unsigned long pgd_val(pgd_t x) +{ + return be64_to_cpu(x.pgd); +} + +/* Page protection bits */ +typedef struct { unsigned long pgprot; } pgprot_t; +#define pgprot_val(x) ((x).pgprot) +#define __pgprot(x) ((pgprot_t) { (x) }) + +/* + * With hash config 64k pages additionally define a bigger "real PTE" type that + * gathers the "second half" part of the PTE for pseudo 64k pages + */ +#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_STD_MMU_64) +typedef struct { pte_t pte; unsigned long hidx; } real_pte_t; +#else +typedef struct { pte_t pte; } real_pte_t; +#endif + +static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new) +{ + unsigned long *p = (unsigned long *)ptep; + __be64 prev; + + prev = (__force __be64)__cmpxchg_u64(p, (__force unsigned long)pte_raw(old), + (__force unsigned long)pte_raw(new)); + + return pte_raw(old) == prev; +} + +static inline bool pmd_xchg(pmd_t *pmdp, pmd_t old, pmd_t new) +{ + unsigned long *p = (unsigned long *)pmdp; + __be64 prev; + + prev = (__force __be64)__cmpxchg_u64(p, (__force unsigned long)pmd_raw(old), + (__force unsigned long)pmd_raw(new)); + + return pmd_raw(old) == prev; +} + +#endif /* _ASM_POWERPC_PGTABLE_BE_TYPES_H */ |