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 #ifndef __ASSEMBLY__ 24 25 #ifndef MAX_PTRS_PER_PGD 26 #define MAX_PTRS_PER_PGD PTRS_PER_PGD 27 #endif 28 29 /* Keep these as a macros to avoid include dependency mess */ 30 #define pte_page(x) pfn_to_page(pte_pfn(x)) 31 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 32 /* 33 * Select all bits except the pfn 34 */ 35 static inline pgprot_t pte_pgprot(pte_t pte) 36 { 37 unsigned long pte_flags; 38 39 pte_flags = pte_val(pte) & ~PTE_RPN_MASK; 40 return __pgprot(pte_flags); 41 } 42 43 #ifndef pmd_page_vaddr 44 static inline unsigned long pmd_page_vaddr(pmd_t pmd) 45 { 46 return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS)); 47 } 48 #define pmd_page_vaddr pmd_page_vaddr 49 #endif 50 /* 51 * ZERO_PAGE is a global shared page that is always zero: used 52 * for zero-mapped memory areas etc.. 53 */ 54 extern unsigned long empty_zero_page[]; 55 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 56 57 extern pgd_t swapper_pg_dir[]; 58 59 extern void paging_init(void); 60 void poking_init(void); 61 62 extern unsigned long ioremap_bot; 63 extern const pgprot_t protection_map[16]; 64 65 /* 66 * kern_addr_valid is intended to indicate whether an address is a valid 67 * kernel address. Most 32-bit archs define it as always true (like this) 68 * but most 64-bit archs actually perform a test. What should we do here? 69 */ 70 #define kern_addr_valid(addr) (1) 71 72 #ifndef CONFIG_TRANSPARENT_HUGEPAGE 73 #define pmd_large(pmd) 0 74 #endif 75 76 /* can we use this in kvm */ 77 unsigned long vmalloc_to_phys(void *vmalloc_addr); 78 79 void pgtable_cache_add(unsigned int shift); 80 81 pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); 82 83 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 84 void mark_initmem_nx(void); 85 #else 86 static inline void mark_initmem_nx(void) { } 87 #endif 88 89 /* 90 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 91 * so we are sure it is included when arriving here. 92 */ 93 #ifdef PTE_FRAG_NR 94 static inline void *pte_frag_get(mm_context_t *ctx) 95 { 96 return ctx->pte_frag; 97 } 98 99 static inline void pte_frag_set(mm_context_t *ctx, void *p) 100 { 101 ctx->pte_frag = p; 102 } 103 #else 104 #define PTE_FRAG_NR 1 105 #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 106 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 107 108 static inline void *pte_frag_get(mm_context_t *ctx) 109 { 110 return NULL; 111 } 112 113 static inline void pte_frag_set(mm_context_t *ctx, void *p) 114 { 115 } 116 #endif 117 118 #ifndef pmd_is_leaf 119 #define pmd_is_leaf pmd_is_leaf 120 static inline bool pmd_is_leaf(pmd_t pmd) 121 { 122 return false; 123 } 124 #endif 125 126 #ifndef pud_is_leaf 127 #define pud_is_leaf pud_is_leaf 128 static inline bool pud_is_leaf(pud_t pud) 129 { 130 return false; 131 } 132 #endif 133 134 #ifndef p4d_is_leaf 135 #define p4d_is_leaf p4d_is_leaf 136 static inline bool p4d_is_leaf(p4d_t p4d) 137 { 138 return false; 139 } 140 #endif 141 142 #define pmd_pgtable pmd_pgtable 143 static inline pgtable_t pmd_pgtable(pmd_t pmd) 144 { 145 return (pgtable_t)pmd_page_vaddr(pmd); 146 } 147 148 #ifdef CONFIG_PPC64 149 #define is_ioremap_addr is_ioremap_addr 150 static inline bool is_ioremap_addr(const void *x) 151 { 152 unsigned long addr = (unsigned long)x; 153 154 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 155 } 156 157 struct seq_file; 158 void arch_report_meminfo(struct seq_file *m); 159 #endif /* CONFIG_PPC64 */ 160 161 #endif /* __ASSEMBLY__ */ 162 163 #endif /* _ASM_POWERPC_PGTABLE_H */ 164