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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef _ASM_POWERPC_PGTABLE_TYPES_H |
| 3 | #define _ASM_POWERPC_PGTABLE_TYPES_H |
| 4 | |
| 5 | #if defined(__CHECKER__) || !defined(CONFIG_PPC32) |
| 6 | #define STRICT_MM_TYPECHECKS |
| 7 | #endif |
| 8 | |
| 9 | /* PTE level */ |
| 10 | #if defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES) |
| 11 | typedef struct { pte_basic_t pte, pte1, pte2, pte3; } pte_t; |
| 12 | #elif defined(STRICT_MM_TYPECHECKS) |
| 13 | typedef struct { pte_basic_t pte; } pte_t; |
| 14 | #else |
| 15 | typedef pte_basic_t pte_t; |
| 16 | #endif |
| 17 | |
| 18 | #if defined(STRICT_MM_TYPECHECKS) || \ |
| 19 | (defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES)) |
| 20 | #define __pte(x) ((pte_t) { (x) }) |
| 21 | static inline pte_basic_t pte_val(pte_t x) |
| 22 | { |
| 23 | return x.pte; |
| 24 | } |
| 25 | #else |
| 26 | #define __pte(x) ((pte_t)(x)) |
| 27 | static inline pte_basic_t pte_val(pte_t x) |
| 28 | { |
| 29 | return x; |
| 30 | } |
| 31 | #endif |
| 32 | |
| 33 | /* PMD level */ |
| 34 | #ifdef CONFIG_PPC64 |
| 35 | typedef struct { unsigned long pmd; } pmd_t; |
| 36 | #define __pmd(x) ((pmd_t) { (x) }) |
| 37 | static inline unsigned long pmd_val(pmd_t x) |
| 38 | { |
| 39 | return x.pmd; |
| 40 | } |
| 41 | |
| 42 | /* 64 bit always use 4 level table. */ |
| 43 | typedef struct { unsigned long pud; } pud_t; |
| 44 | #define __pud(x) ((pud_t) { (x) }) |
| 45 | static inline unsigned long pud_val(pud_t x) |
| 46 | { |
| 47 | return x.pud; |
| 48 | } |
| 49 | #endif /* CONFIG_PPC64 */ |
| 50 | |
| 51 | /* PGD level */ |
| 52 | #if defined(CONFIG_PPC_85xx) && defined(CONFIG_PTE_64BIT) |
| 53 | typedef struct { unsigned long long pgd; } pgd_t; |
| 54 | |
| 55 | static inline unsigned long long pgd_val(pgd_t x) |
| 56 | { |
| 57 | return x.pgd; |
| 58 | } |
| 59 | #else |
| 60 | typedef struct { unsigned long pgd; } pgd_t; |
| 61 | |
| 62 | static inline unsigned long pgd_val(pgd_t x) |
| 63 | { |
| 64 | return x.pgd; |
| 65 | } |
| 66 | #endif |
| 67 | #define __pgd(x) ((pgd_t) { (x) }) |
| 68 | |
| 69 | /* Page protection bits */ |
| 70 | typedef struct { unsigned long pgprot; } pgprot_t; |
| 71 | #define pgprot_val(x) ((x).pgprot) |
| 72 | #define __pgprot(x) ((pgprot_t) { (x) }) |
| 73 | |
| 74 | /* |
| 75 | * With hash config 64k pages additionally define a bigger "real PTE" type that |
| 76 | * gathers the "second half" part of the PTE for pseudo 64k pages |
| 77 | */ |
| 78 | #ifdef CONFIG_PPC_64K_PAGES |
| 79 | typedef struct { pte_t pte; unsigned long hidx; } real_pte_t; |
| 80 | #else |
| 81 | typedef struct { pte_t pte; } real_pte_t; |
| 82 | #endif |
| 83 | |
| 84 | #ifdef CONFIG_PPC_BOOK3S_64 |
| 85 | #include <asm/cmpxchg.h> |
| 86 | |
| 87 | static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new) |
| 88 | { |
| 89 | unsigned long *p = (unsigned long *)ptep; |
| 90 | |
| 91 | /* See comment in switch_mm_irqs_off() */ |
| 92 | return pte_val(old) == __cmpxchg_u64(p, pte_val(old), pte_val(new)); |
| 93 | } |
| 94 | #endif |
| 95 | |
| 96 | #endif /* _ASM_POWERPC_PGTABLE_TYPES_H */ |
| 97 |
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