1 #ifndef _ASM_POWERPC_PGTABLE_TYPES_H 2 #define _ASM_POWERPC_PGTABLE_TYPES_H 3 4 /* PTE level */ 5 typedef struct { pte_basic_t pte; } pte_t; 6 #define __pte(x) ((pte_t) { (x) }) pte_val(pte_t x)7static inline pte_basic_t pte_val(pte_t x) 8 { 9 return x.pte; 10 } 11 12 /* PMD level */ 13 #ifdef CONFIG_PPC64 14 typedef struct { unsigned long pmd; } pmd_t; 15 #define __pmd(x) ((pmd_t) { (x) }) pmd_val(pmd_t x)16static inline unsigned long pmd_val(pmd_t x) 17 { 18 return x.pmd; 19 } 20 21 /* 22 * 64 bit hash always use 4 level table. Everybody else use 4 level 23 * only for 4K page size. 24 */ 25 #if defined(CONFIG_PPC_BOOK3S_64) || !defined(CONFIG_PPC_64K_PAGES) 26 typedef struct { unsigned long pud; } pud_t; 27 #define __pud(x) ((pud_t) { (x) }) pud_val(pud_t x)28static inline unsigned long pud_val(pud_t x) 29 { 30 return x.pud; 31 } 32 #endif /* CONFIG_PPC_BOOK3S_64 || !CONFIG_PPC_64K_PAGES */ 33 #endif /* CONFIG_PPC64 */ 34 35 /* PGD level */ 36 typedef struct { unsigned long pgd; } pgd_t; 37 #define __pgd(x) ((pgd_t) { (x) }) pgd_val(pgd_t x)38static inline unsigned long pgd_val(pgd_t x) 39 { 40 return x.pgd; 41 } 42 43 /* Page protection bits */ 44 typedef struct { unsigned long pgprot; } pgprot_t; 45 #define pgprot_val(x) ((x).pgprot) 46 #define __pgprot(x) ((pgprot_t) { (x) }) 47 48 /* 49 * With hash config 64k pages additionally define a bigger "real PTE" type that 50 * gathers the "second half" part of the PTE for pseudo 64k pages 51 */ 52 #if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_STD_MMU_64) 53 typedef struct { pte_t pte; unsigned long hidx; } real_pte_t; 54 #else 55 typedef struct { pte_t pte; } real_pte_t; 56 #endif 57 58 #ifdef CONFIG_PPC_STD_MMU_64 59 #include <asm/cmpxchg.h> 60 pte_xchg(pte_t * ptep,pte_t old,pte_t new)61static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new) 62 { 63 unsigned long *p = (unsigned long *)ptep; 64 65 /* See comment in switch_mm_irqs_off() */ 66 return pte_val(old) == __cmpxchg_u64(p, pte_val(old), pte_val(new)); 67 } 68 #endif 69 70 #endif /* _ASM_POWERPC_PGTABLE_TYPES_H */ 71