1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_PGTABLE_BE_TYPES_H 3 #define _ASM_POWERPC_PGTABLE_BE_TYPES_H 4 5 #include <asm/cmpxchg.h> 6 7 /* PTE level */ 8 typedef struct { __be64 pte; } pte_t; 9 #define __pte(x) ((pte_t) { cpu_to_be64(x) }) 10 #define __pte_raw(x) ((pte_t) { (x) }) 11 static inline unsigned long pte_val(pte_t x) 12 { 13 return be64_to_cpu(x.pte); 14 } 15 16 static inline __be64 pte_raw(pte_t x) 17 { 18 return x.pte; 19 } 20 21 /* PMD level */ 22 #ifdef CONFIG_PPC64 23 typedef struct { __be64 pmd; } pmd_t; 24 #define __pmd(x) ((pmd_t) { cpu_to_be64(x) }) 25 #define __pmd_raw(x) ((pmd_t) { (x) }) 26 static inline unsigned long pmd_val(pmd_t x) 27 { 28 return be64_to_cpu(x.pmd); 29 } 30 31 static inline __be64 pmd_raw(pmd_t x) 32 { 33 return x.pmd; 34 } 35 36 /* 64 bit always use 4 level table. */ 37 typedef struct { __be64 pud; } pud_t; 38 #define __pud(x) ((pud_t) { cpu_to_be64(x) }) 39 #define __pud_raw(x) ((pud_t) { (x) }) 40 static inline unsigned long pud_val(pud_t x) 41 { 42 return be64_to_cpu(x.pud); 43 } 44 45 static inline __be64 pud_raw(pud_t x) 46 { 47 return x.pud; 48 } 49 50 #endif /* CONFIG_PPC64 */ 51 52 /* PGD level */ 53 typedef struct { __be64 pgd; } pgd_t; 54 #define __pgd(x) ((pgd_t) { cpu_to_be64(x) }) 55 #define __pgd_raw(x) ((pgd_t) { (x) }) 56 static inline unsigned long pgd_val(pgd_t x) 57 { 58 return be64_to_cpu(x.pgd); 59 } 60 61 static inline __be64 pgd_raw(pgd_t x) 62 { 63 return x.pgd; 64 } 65 66 /* Page protection bits */ 67 typedef struct { unsigned long pgprot; } pgprot_t; 68 #define pgprot_val(x) ((x).pgprot) 69 #define __pgprot(x) ((pgprot_t) { (x) }) 70 71 /* 72 * With hash config 64k pages additionally define a bigger "real PTE" type that 73 * gathers the "second half" part of the PTE for pseudo 64k pages 74 */ 75 #ifdef CONFIG_PPC_64K_PAGES 76 typedef struct { pte_t pte; unsigned long hidx; } real_pte_t; 77 #else 78 typedef struct { pte_t pte; } real_pte_t; 79 #endif 80 81 static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new) 82 { 83 unsigned long *p = (unsigned long *)ptep; 84 __be64 prev; 85 86 /* See comment in switch_mm_irqs_off() */ 87 prev = (__force __be64)__cmpxchg_u64(p, (__force unsigned long)pte_raw(old), 88 (__force unsigned long)pte_raw(new)); 89 90 return pte_raw(old) == prev; 91 } 92 93 static inline bool pmd_xchg(pmd_t *pmdp, pmd_t old, pmd_t new) 94 { 95 unsigned long *p = (unsigned long *)pmdp; 96 __be64 prev; 97 98 prev = (__force __be64)__cmpxchg_u64(p, (__force unsigned long)pmd_raw(old), 99 (__force unsigned long)pmd_raw(new)); 100 101 return pmd_raw(old) == prev; 102 } 103 104 #ifdef CONFIG_ARCH_HAS_HUGEPD 105 typedef struct { __be64 pdbe; } hugepd_t; 106 #define __hugepd(x) ((hugepd_t) { cpu_to_be64(x) }) 107 108 static inline unsigned long hpd_val(hugepd_t x) 109 { 110 return be64_to_cpu(x.pdbe); 111 } 112 #endif 113 114 #endif /* _ASM_POWERPC_PGTABLE_BE_TYPES_H */ 115