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 /* 24 * Protection used for kernel text. We want the debuggers to be able to 25 * set breakpoints anywhere, so don't write protect the kernel text 26 * on platforms where such control is possible. 27 */ 28 #if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \ 29 defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE) 30 #define PAGE_KERNEL_TEXT PAGE_KERNEL_X 31 #else 32 #define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX 33 #endif 34 35 /* Make modules code happy. We don't set RO yet */ 36 #define PAGE_KERNEL_EXEC PAGE_KERNEL_X 37 38 /* Advertise special mapping type for AGP */ 39 #define PAGE_AGP (PAGE_KERNEL_NC) 40 #define HAVE_PAGE_AGP 41 42 #ifndef __ASSEMBLY__ 43 44 #ifndef MAX_PTRS_PER_PGD 45 #define MAX_PTRS_PER_PGD PTRS_PER_PGD 46 #endif 47 48 /* Keep these as a macros to avoid include dependency mess */ 49 #define pte_page(x) pfn_to_page(pte_pfn(x)) 50 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 51 /* 52 * Select all bits except the pfn 53 */ 54 static inline pgprot_t pte_pgprot(pte_t pte) 55 { 56 unsigned long pte_flags; 57 58 pte_flags = pte_val(pte) & ~PTE_RPN_MASK; 59 return __pgprot(pte_flags); 60 } 61 62 #ifndef pmd_page_vaddr 63 static inline unsigned long pmd_page_vaddr(pmd_t pmd) 64 { 65 return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS)); 66 } 67 #define pmd_page_vaddr pmd_page_vaddr 68 #endif 69 /* 70 * ZERO_PAGE is a global shared page that is always zero: used 71 * for zero-mapped memory areas etc.. 72 */ 73 extern unsigned long empty_zero_page[]; 74 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 75 76 extern pgd_t swapper_pg_dir[]; 77 78 extern void paging_init(void); 79 void poking_init(void); 80 81 extern unsigned long ioremap_bot; 82 extern const pgprot_t protection_map[16]; 83 84 #ifndef CONFIG_TRANSPARENT_HUGEPAGE 85 #define pmd_large(pmd) 0 86 #endif 87 88 /* can we use this in kvm */ 89 unsigned long vmalloc_to_phys(void *vmalloc_addr); 90 91 void pgtable_cache_add(unsigned int shift); 92 93 pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); 94 95 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 96 void mark_initmem_nx(void); 97 #else 98 static inline void mark_initmem_nx(void) { } 99 #endif 100 101 /* 102 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 103 * so we are sure it is included when arriving here. 104 */ 105 #ifdef PTE_FRAG_NR 106 static inline void *pte_frag_get(mm_context_t *ctx) 107 { 108 return ctx->pte_frag; 109 } 110 111 static inline void pte_frag_set(mm_context_t *ctx, void *p) 112 { 113 ctx->pte_frag = p; 114 } 115 #else 116 #define PTE_FRAG_NR 1 117 #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 118 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 119 120 static inline void *pte_frag_get(mm_context_t *ctx) 121 { 122 return NULL; 123 } 124 125 static inline void pte_frag_set(mm_context_t *ctx, void *p) 126 { 127 } 128 #endif 129 130 #ifndef pmd_is_leaf 131 #define pmd_is_leaf pmd_is_leaf 132 static inline bool pmd_is_leaf(pmd_t pmd) 133 { 134 return false; 135 } 136 #endif 137 138 #ifndef pud_is_leaf 139 #define pud_is_leaf pud_is_leaf 140 static inline bool pud_is_leaf(pud_t pud) 141 { 142 return false; 143 } 144 #endif 145 146 #ifndef p4d_is_leaf 147 #define p4d_is_leaf p4d_is_leaf 148 static inline bool p4d_is_leaf(p4d_t p4d) 149 { 150 return false; 151 } 152 #endif 153 154 #define pmd_pgtable pmd_pgtable 155 static inline pgtable_t pmd_pgtable(pmd_t pmd) 156 { 157 return (pgtable_t)pmd_page_vaddr(pmd); 158 } 159 160 #ifdef CONFIG_PPC64 161 #define is_ioremap_addr is_ioremap_addr 162 static inline bool is_ioremap_addr(const void *x) 163 { 164 unsigned long addr = (unsigned long)x; 165 166 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 167 } 168 #endif /* CONFIG_PPC64 */ 169 170 #endif /* __ASSEMBLY__ */ 171 172 #endif /* _ASM_POWERPC_PGTABLE_H */ 173