| .. | .. |
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| 1 | | -/* |
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| 1 | +/* SPDX-License-Identifier: GPL-2.0 |
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| 2 | + * |
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| 2 | 3 | * This file contains the functions and defines necessary to modify and |
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| 3 | 4 | * use the SuperH page table tree. |
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| 4 | 5 | * |
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| 5 | 6 | * Copyright (C) 1999 Niibe Yutaka |
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| 6 | 7 | * Copyright (C) 2002 - 2007 Paul Mundt |
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| 7 | | - * |
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| 8 | | - * This file is subject to the terms and conditions of the GNU General |
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| 9 | | - * Public License. See the file "COPYING" in the main directory of this |
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| 10 | | - * archive for more details. |
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| 11 | 8 | */ |
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| 12 | 9 | #ifndef __ASM_SH_PGTABLE_H |
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| 13 | 10 | #define __ASM_SH_PGTABLE_H |
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| .. | .. |
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| 79 | 76 | #define PTE_PHYS_MASK (phys_addr_mask() & PAGE_MASK) |
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| 80 | 77 | #define PTE_FLAGS_MASK (~(PTE_PHYS_MASK) << PAGE_SHIFT) |
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| 81 | 78 | |
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| 82 | | -#ifdef CONFIG_SUPERH32 |
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| 83 | 79 | #define VMALLOC_START (P3SEG) |
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| 84 | | -#else |
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| 85 | | -#define VMALLOC_START (0xf0000000) |
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| 86 | | -#endif |
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| 87 | 80 | #define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE) |
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| 88 | 81 | |
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| 89 | | -#if defined(CONFIG_SUPERH32) |
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| 90 | 82 | #include <asm/pgtable_32.h> |
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| 91 | | -#else |
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| 92 | | -#include <asm/pgtable_64.h> |
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| 93 | | -#endif |
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| 94 | 83 | |
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| 95 | 84 | /* |
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| 96 | 85 | * SH-X and lower (legacy) SuperH parts (SH-3, SH-4, some SH-4A) can't do page |
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| .. | .. |
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| 126 | 115 | |
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| 127 | 116 | #define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT))) |
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| 128 | 117 | |
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| 129 | | -/* |
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| 130 | | - * Initialise the page table caches |
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| 131 | | - */ |
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| 132 | | -extern void pgtable_cache_init(void); |
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| 133 | | - |
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| 134 | 118 | struct vm_area_struct; |
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| 135 | 119 | struct mm_struct; |
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| 136 | 120 | |
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| .. | .. |
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| 152 | 136 | extern void page_table_range_init(unsigned long start, unsigned long end, |
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| 153 | 137 | pgd_t *pgd); |
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| 154 | 138 | |
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| 139 | +static inline bool __pte_access_permitted(pte_t pte, u64 prot) |
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| 140 | +{ |
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| 141 | + return (pte_val(pte) & (prot | _PAGE_SPECIAL)) == prot; |
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| 142 | +} |
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| 143 | + |
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| 144 | +#ifdef CONFIG_X2TLB |
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| 145 | +static inline bool pte_access_permitted(pte_t pte, bool write) |
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| 146 | +{ |
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| 147 | + u64 prot = _PAGE_PRESENT; |
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| 148 | + |
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| 149 | + prot |= _PAGE_EXT(_PAGE_EXT_KERN_READ | _PAGE_EXT_USER_READ); |
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| 150 | + if (write) |
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| 151 | + prot |= _PAGE_EXT(_PAGE_EXT_KERN_WRITE | _PAGE_EXT_USER_WRITE); |
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| 152 | + return __pte_access_permitted(pte, prot); |
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| 153 | +} |
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| 154 | +#else |
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| 155 | +static inline bool pte_access_permitted(pte_t pte, bool write) |
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| 156 | +{ |
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| 157 | + u64 prot = _PAGE_PRESENT | _PAGE_USER; |
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| 158 | + |
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| 159 | + if (write) |
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| 160 | + prot |= _PAGE_RW; |
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| 161 | + return __pte_access_permitted(pte, prot); |
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| 162 | +} |
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| 163 | +#endif |
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| 164 | + |
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| 165 | +#define pte_access_permitted pte_access_permitted |
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| 166 | + |
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| 155 | 167 | /* arch/sh/mm/mmap.c */ |
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| 156 | 168 | #define HAVE_ARCH_UNMAPPED_AREA |
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| 157 | 169 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
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| 158 | | - |
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| 159 | | -#include <asm-generic/pgtable.h> |
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| 160 | 170 | |
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| 161 | 171 | #endif /* __ASM_SH_PGTABLE_H */ |
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