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 #ifdef CONFIG_PPC32 45 static inline pmd_t *pmd_ptr(struct mm_struct *mm, unsigned long va) 46 { 47 return pmd_offset(pud_offset(pgd_offset(mm, va), va), va); 48 } 49 50 static inline pmd_t *pmd_ptr_k(unsigned long va) 51 { 52 return pmd_offset(pud_offset(pgd_offset_k(va), va), va); 53 } 54 55 static inline pte_t *virt_to_kpte(unsigned long vaddr) 56 { 57 pmd_t *pmd = pmd_ptr_k(vaddr); 58 59 return pmd_none(*pmd) ? NULL : pte_offset_kernel(pmd, vaddr); 60 } 61 #endif 62 63 #include <asm/tlbflush.h> 64 65 /* Keep these as a macros to avoid include dependency mess */ 66 #define pte_page(x) pfn_to_page(pte_pfn(x)) 67 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 68 /* 69 * Select all bits except the pfn 70 */ 71 static inline pgprot_t pte_pgprot(pte_t pte) 72 { 73 unsigned long pte_flags; 74 75 pte_flags = pte_val(pte) & ~PTE_RPN_MASK; 76 return __pgprot(pte_flags); 77 } 78 79 /* 80 * ZERO_PAGE is a global shared page that is always zero: used 81 * for zero-mapped memory areas etc.. 82 */ 83 extern unsigned long empty_zero_page[]; 84 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 85 86 extern pgd_t swapper_pg_dir[]; 87 88 extern void paging_init(void); 89 90 extern unsigned long ioremap_bot; 91 92 /* 93 * kern_addr_valid is intended to indicate whether an address is a valid 94 * kernel address. Most 32-bit archs define it as always true (like this) 95 * but most 64-bit archs actually perform a test. What should we do here? 96 */ 97 #define kern_addr_valid(addr) (1) 98 99 #include <asm-generic/pgtable.h> 100 101 #ifndef CONFIG_TRANSPARENT_HUGEPAGE 102 #define pmd_large(pmd) 0 103 #endif 104 105 /* can we use this in kvm */ 106 unsigned long vmalloc_to_phys(void *vmalloc_addr); 107 108 void pgtable_cache_add(unsigned int shift); 109 110 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 111 void mark_initmem_nx(void); 112 #else 113 static inline void mark_initmem_nx(void) { } 114 #endif 115 116 /* 117 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 118 * so we are sure it is included when arriving here. 119 */ 120 #ifdef PTE_FRAG_NR 121 static inline void *pte_frag_get(mm_context_t *ctx) 122 { 123 return ctx->pte_frag; 124 } 125 126 static inline void pte_frag_set(mm_context_t *ctx, void *p) 127 { 128 ctx->pte_frag = p; 129 } 130 #else 131 #define PTE_FRAG_NR 1 132 #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 133 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 134 135 static inline void *pte_frag_get(mm_context_t *ctx) 136 { 137 return NULL; 138 } 139 140 static inline void pte_frag_set(mm_context_t *ctx, void *p) 141 { 142 } 143 #endif 144 145 #ifndef pmd_is_leaf 146 #define pmd_is_leaf pmd_is_leaf 147 static inline bool pmd_is_leaf(pmd_t pmd) 148 { 149 return false; 150 } 151 #endif 152 153 #ifndef pud_is_leaf 154 #define pud_is_leaf pud_is_leaf 155 static inline bool pud_is_leaf(pud_t pud) 156 { 157 return false; 158 } 159 #endif 160 161 #ifndef pgd_is_leaf 162 #define pgd_is_leaf pgd_is_leaf 163 static inline bool pgd_is_leaf(pgd_t pgd) 164 { 165 return false; 166 } 167 #endif 168 169 #ifdef CONFIG_PPC64 170 #define is_ioremap_addr is_ioremap_addr 171 static inline bool is_ioremap_addr(const void *x) 172 { 173 unsigned long addr = (unsigned long)x; 174 175 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 176 } 177 #endif /* CONFIG_PPC64 */ 178 179 #endif /* __ASSEMBLY__ */ 180 181 #endif /* _ASM_POWERPC_PGTABLE_H */ 182