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 #ifndef pmd_page_vaddr 61 static inline unsigned long pmd_page_vaddr(pmd_t pmd) 62 { 63 return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS)); 64 } 65 #define pmd_page_vaddr pmd_page_vaddr 66 #endif 67 /* 68 * ZERO_PAGE is a global shared page that is always zero: used 69 * for zero-mapped memory areas etc.. 70 */ 71 extern unsigned long empty_zero_page[]; 72 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 73 74 extern pgd_t swapper_pg_dir[]; 75 76 extern void paging_init(void); 77 78 extern unsigned long ioremap_bot; 79 80 /* 81 * kern_addr_valid is intended to indicate whether an address is a valid 82 * kernel address. Most 32-bit archs define it as always true (like this) 83 * but most 64-bit archs actually perform a test. What should we do here? 84 */ 85 #define kern_addr_valid(addr) (1) 86 87 #ifndef CONFIG_TRANSPARENT_HUGEPAGE 88 #define pmd_large(pmd) 0 89 #endif 90 91 /* can we use this in kvm */ 92 unsigned long vmalloc_to_phys(void *vmalloc_addr); 93 94 void pgtable_cache_add(unsigned int shift); 95 96 pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); 97 98 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 99 void mark_initmem_nx(void); 100 #else 101 static inline void mark_initmem_nx(void) { } 102 #endif 103 104 /* 105 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 106 * so we are sure it is included when arriving here. 107 */ 108 #ifdef PTE_FRAG_NR 109 static inline void *pte_frag_get(mm_context_t *ctx) 110 { 111 return ctx->pte_frag; 112 } 113 114 static inline void pte_frag_set(mm_context_t *ctx, void *p) 115 { 116 ctx->pte_frag = p; 117 } 118 #else 119 #define PTE_FRAG_NR 1 120 #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 121 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 122 123 static inline void *pte_frag_get(mm_context_t *ctx) 124 { 125 return NULL; 126 } 127 128 static inline void pte_frag_set(mm_context_t *ctx, void *p) 129 { 130 } 131 #endif 132 133 #ifndef pmd_is_leaf 134 #define pmd_is_leaf pmd_is_leaf 135 static inline bool pmd_is_leaf(pmd_t pmd) 136 { 137 return false; 138 } 139 #endif 140 141 #ifndef pud_is_leaf 142 #define pud_is_leaf pud_is_leaf 143 static inline bool pud_is_leaf(pud_t pud) 144 { 145 return false; 146 } 147 #endif 148 149 #ifndef p4d_is_leaf 150 #define p4d_is_leaf p4d_is_leaf 151 static inline bool p4d_is_leaf(p4d_t p4d) 152 { 153 return false; 154 } 155 #endif 156 157 #ifdef CONFIG_PPC64 158 #define is_ioremap_addr is_ioremap_addr 159 static inline bool is_ioremap_addr(const void *x) 160 { 161 unsigned long addr = (unsigned long)x; 162 163 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 164 } 165 #endif /* CONFIG_PPC64 */ 166 167 #endif /* __ASSEMBLY__ */ 168 169 #endif /* _ASM_POWERPC_PGTABLE_H */ 170