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 /* 98 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 99 * so we are sure it is included when arriving here. 100 */ 101 #ifdef PTE_FRAG_NR 102 static inline void *pte_frag_get(mm_context_t *ctx) 103 { 104 return ctx->pte_frag; 105 } 106 107 static inline void pte_frag_set(mm_context_t *ctx, void *p) 108 { 109 ctx->pte_frag = p; 110 } 111 #else 112 #define PTE_FRAG_NR 1 113 #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 114 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 115 116 static inline void *pte_frag_get(mm_context_t *ctx) 117 { 118 return NULL; 119 } 120 121 static inline void pte_frag_set(mm_context_t *ctx, void *p) 122 { 123 } 124 #endif 125 126 #ifndef pmd_is_leaf 127 #define pmd_is_leaf pmd_is_leaf 128 static inline bool pmd_is_leaf(pmd_t pmd) 129 { 130 return false; 131 } 132 #endif 133 134 #ifndef pud_is_leaf 135 #define pud_is_leaf pud_is_leaf 136 static inline bool pud_is_leaf(pud_t pud) 137 { 138 return false; 139 } 140 #endif 141 142 #ifndef pgd_is_leaf 143 #define pgd_is_leaf pgd_is_leaf 144 static inline bool pgd_is_leaf(pgd_t pgd) 145 { 146 return false; 147 } 148 #endif 149 150 #ifdef CONFIG_PPC64 151 #define is_ioremap_addr is_ioremap_addr 152 static inline bool is_ioremap_addr(const void *x) 153 { 154 unsigned long addr = (unsigned long)x; 155 156 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 157 } 158 #endif /* CONFIG_PPC64 */ 159 160 #endif /* __ASSEMBLY__ */ 161 162 #endif /* _ASM_POWERPC_PGTABLE_H */ 163