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 #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 80 extern unsigned long ioremap_bot; 81 82 /* 83 * kern_addr_valid is intended to indicate whether an address is a valid 84 * kernel address. Most 32-bit archs define it as always true (like this) 85 * but most 64-bit archs actually perform a test. What should we do here? 86 */ 87 #define kern_addr_valid(addr) (1) 88 89 #ifndef CONFIG_TRANSPARENT_HUGEPAGE 90 #define pmd_large(pmd) 0 91 #endif 92 93 /* can we use this in kvm */ 94 unsigned long vmalloc_to_phys(void *vmalloc_addr); 95 96 void pgtable_cache_add(unsigned int shift); 97 98 pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); 99 100 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 101 void mark_initmem_nx(void); 102 #else 103 static inline void mark_initmem_nx(void) { } 104 #endif 105 106 /* 107 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 108 * so we are sure it is included when arriving here. 109 */ 110 #ifdef PTE_FRAG_NR 111 static inline void *pte_frag_get(mm_context_t *ctx) 112 { 113 return ctx->pte_frag; 114 } 115 116 static inline void pte_frag_set(mm_context_t *ctx, void *p) 117 { 118 ctx->pte_frag = p; 119 } 120 #else 121 #define PTE_FRAG_NR 1 122 #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 123 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 124 125 static inline void *pte_frag_get(mm_context_t *ctx) 126 { 127 return NULL; 128 } 129 130 static inline void pte_frag_set(mm_context_t *ctx, void *p) 131 { 132 } 133 #endif 134 135 #ifndef pmd_is_leaf 136 #define pmd_is_leaf pmd_is_leaf 137 static inline bool pmd_is_leaf(pmd_t pmd) 138 { 139 return false; 140 } 141 #endif 142 143 #ifndef pud_is_leaf 144 #define pud_is_leaf pud_is_leaf 145 static inline bool pud_is_leaf(pud_t pud) 146 { 147 return false; 148 } 149 #endif 150 151 #ifndef p4d_is_leaf 152 #define p4d_is_leaf p4d_is_leaf 153 static inline bool p4d_is_leaf(p4d_t p4d) 154 { 155 return false; 156 } 157 #endif 158 159 #ifdef CONFIG_PPC64 160 #define is_ioremap_addr is_ioremap_addr 161 static inline bool is_ioremap_addr(const void *x) 162 { 163 unsigned long addr = (unsigned long)x; 164 165 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 166 } 167 168 struct seq_file; 169 void arch_report_meminfo(struct seq_file *m); 170 #endif /* CONFIG_PPC64 */ 171 172 #endif /* __ASSEMBLY__ */ 173 174 #endif /* _ASM_POWERPC_PGTABLE_H */ 175