1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_PGTABLE_H 3 #define _ASM_POWERPC_PGTABLE_H 4 5 #ifndef __ASSEMBLY__ 6 #include <linux/mmdebug.h> 7 #include <linux/mmzone.h> 8 #include <asm/processor.h> /* For TASK_SIZE */ 9 #include <asm/mmu.h> 10 #include <asm/page.h> 11 #include <asm/tlbflush.h> 12 13 struct mm_struct; 14 15 #endif /* !__ASSEMBLY__ */ 16 17 #ifdef CONFIG_PPC_BOOK3S 18 #include <asm/book3s/pgtable.h> 19 #else 20 #include <asm/nohash/pgtable.h> 21 #endif /* !CONFIG_PPC_BOOK3S */ 22 23 /* Note due to the way vm flags are laid out, the bits are XWR */ 24 #define __P000 PAGE_NONE 25 #define __P001 PAGE_READONLY 26 #define __P010 PAGE_COPY 27 #define __P011 PAGE_COPY 28 #define __P100 PAGE_READONLY_X 29 #define __P101 PAGE_READONLY_X 30 #define __P110 PAGE_COPY_X 31 #define __P111 PAGE_COPY_X 32 33 #define __S000 PAGE_NONE 34 #define __S001 PAGE_READONLY 35 #define __S010 PAGE_SHARED 36 #define __S011 PAGE_SHARED 37 #define __S100 PAGE_READONLY_X 38 #define __S101 PAGE_READONLY_X 39 #define __S110 PAGE_SHARED_X 40 #define __S111 PAGE_SHARED_X 41 42 #ifndef __ASSEMBLY__ 43 44 #include <asm/tlbflush.h> 45 46 /* Keep these as a macros to avoid include dependency mess */ 47 #define pte_page(x) pfn_to_page(pte_pfn(x)) 48 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 49 /* 50 * Select all bits except the pfn 51 */ 52 static inline pgprot_t pte_pgprot(pte_t pte) 53 { 54 unsigned long pte_flags; 55 56 pte_flags = pte_val(pte) & ~PTE_RPN_MASK; 57 return __pgprot(pte_flags); 58 } 59 60 /* 61 * ZERO_PAGE is a global shared page that is always zero: used 62 * for zero-mapped memory areas etc.. 63 */ 64 extern unsigned long empty_zero_page[]; 65 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 66 67 extern pgd_t swapper_pg_dir[]; 68 69 extern void paging_init(void); 70 71 extern unsigned long ioremap_bot; 72 73 /* 74 * kern_addr_valid is intended to indicate whether an address is a valid 75 * kernel address. Most 32-bit archs define it as always true (like this) 76 * but most 64-bit archs actually perform a test. What should we do here? 77 */ 78 #define kern_addr_valid(addr) (1) 79 80 #include <asm-generic/pgtable.h> 81 82 #ifndef CONFIG_TRANSPARENT_HUGEPAGE 83 #define pmd_large(pmd) 0 84 #endif 85 86 /* can we use this in kvm */ 87 unsigned long vmalloc_to_phys(void *vmalloc_addr); 88 89 void pgtable_cache_add(unsigned int shift); 90 91 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 92 void mark_initmem_nx(void); 93 #else 94 static inline void mark_initmem_nx(void) { } 95 #endif 96 97 #ifdef CONFIG_PPC_DEBUG_WX 98 void ptdump_check_wx(void); 99 #else 100 static inline void ptdump_check_wx(void) { } 101 #endif 102 103 /* 104 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 105 * so we are sure it is included when arriving here. 106 */ 107 #ifdef PTE_FRAG_NR 108 static inline void *pte_frag_get(mm_context_t *ctx) 109 { 110 return ctx->pte_frag; 111 } 112 113 static inline void pte_frag_set(mm_context_t *ctx, void *p) 114 { 115 ctx->pte_frag = p; 116 } 117 #else 118 #define PTE_FRAG_NR 1 119 #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 120 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 121 122 static inline void *pte_frag_get(mm_context_t *ctx) 123 { 124 return NULL; 125 } 126 127 static inline void pte_frag_set(mm_context_t *ctx, void *p) 128 { 129 } 130 #endif 131 132 #ifndef pmd_is_leaf 133 #define pmd_is_leaf pmd_is_leaf 134 static inline bool pmd_is_leaf(pmd_t pmd) 135 { 136 return false; 137 } 138 #endif 139 140 #ifndef pud_is_leaf 141 #define pud_is_leaf pud_is_leaf 142 static inline bool pud_is_leaf(pud_t pud) 143 { 144 return false; 145 } 146 #endif 147 148 #ifndef pgd_is_leaf 149 #define pgd_is_leaf pgd_is_leaf 150 static inline bool pgd_is_leaf(pgd_t pgd) 151 { 152 return false; 153 } 154 #endif 155 156 #ifdef CONFIG_PPC64 157 #define is_ioremap_addr is_ioremap_addr 158 static inline bool is_ioremap_addr(const void *x) 159 { 160 unsigned long addr = (unsigned long)x; 161 162 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 163 } 164 #endif /* CONFIG_PPC64 */ 165 166 #endif /* __ASSEMBLY__ */ 167 168 #endif /* _ASM_POWERPC_PGTABLE_H */ 169