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) }) pte_val(pte_t x)21static inline pte_basic_t pte_val(pte_t x) 22 { 23 return x.pte; 24 } 25 #else 26 #define __pte(x) ((pte_t)(x)) pte_val(pte_t x)27static 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) }) pmd_val(pmd_t x)37static 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) }) pud_val(pud_t x)45static 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 pgd_val(pgd_t x)55static 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 pgd_val(pgd_t x)62static 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 pte_xchg(pte_t * ptep,pte_t old,pte_t new)87static 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