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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com> * Copyright (C) 2012 Regents of the University of California * Copyright (C) 2017 SiFive * Copyright (C) 2017 XiaojingZhu <zhuxiaoj@ict.ac.cn> */ #ifndef _ASM_RISCV_PAGE_H #define _ASM_RISCV_PAGE_H #include <linux/pfn.h> #include <linux/const.h> #define PAGE_SHIFT (12) #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE - 1)) #define HPAGE_SHIFT PMD_SHIFT #define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) /* * PAGE_OFFSET -- the first address of the first page of memory. * When not using MMU this corresponds to the first free page in * physical memory (aligned on a page boundary). */ #ifdef CONFIG_64BIT #ifdef CONFIG_MMU #define PAGE_OFFSET kernel_map.page_offset #else #define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) #endif /* * By default, CONFIG_PAGE_OFFSET value corresponds to SV48 address space so * define the PAGE_OFFSET value for SV39. */ #define PAGE_OFFSET_L4 _AC(0xffffaf8000000000, UL) #define PAGE_OFFSET_L3 _AC(0xffffffd800000000, UL) #else #define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) #endif /* CONFIG_64BIT */ #ifndef __ASSEMBLY__ #ifdef CONFIG_RISCV_ISA_ZICBOZ void clear_page(void *page); #else #define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) #endif #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) #define clear_user_page(pgaddr, vaddr, page) clear_page(pgaddr) #define copy_user_page(vto, vfrom, vaddr, topg) \ memcpy((vto), (vfrom), PAGE_SIZE) /* * Use struct definitions to apply C type checking */ /* Page Global Directory entry */ typedef struct { unsigned long pgd; } pgd_t; /* Page Table entry */ typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pgprot; } pgprot_t; typedef struct page *pgtable_t; #define pte_val(x) ((x).pte) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) }) #define __pgd(x) ((pgd_t) { (x) }) #define __pgprot(x) ((pgprot_t) { (x) }) #ifdef CONFIG_64BIT #define PTE_FMT "%016lx" #else #define PTE_FMT "%08lx" #endif #ifdef CONFIG_64BIT /* * We override this value as its generic definition uses __pa too early in * the boot process (before kernel_map.va_pa_offset is set). */ #define MIN_MEMBLOCK_ADDR 0 #endif #ifdef CONFIG_MMU #define ARCH_PFN_OFFSET (PFN_DOWN((unsigned long)phys_ram_base)) #else #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) #endif /* CONFIG_MMU */ struct kernel_mapping { unsigned long page_offset; unsigned long virt_addr; uintptr_t phys_addr; uintptr_t size; /* Offset between linear mapping virtual address and kernel load address */ unsigned long va_pa_offset; /* Offset between kernel mapping virtual address and kernel load address */ unsigned long va_kernel_pa_offset; unsigned long va_kernel_xip_pa_offset; #ifdef CONFIG_XIP_KERNEL uintptr_t xiprom; uintptr_t xiprom_sz; #endif }; extern struct kernel_mapping kernel_map; extern phys_addr_t phys_ram_base; #define is_kernel_mapping(x) \ ((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size)) #define is_linear_mapping(x) \ ((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < PAGE_OFFSET + KERN_VIRT_SIZE)) #ifndef CONFIG_DEBUG_VIRTUAL #define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset)) #else void *linear_mapping_pa_to_va(unsigned long x); #endif #define kernel_mapping_pa_to_va(y) ({ \ unsigned long _y = (unsigned long)(y); \ (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < phys_ram_base) ? \ (void *)(_y + kernel_map.va_kernel_xip_pa_offset) : \ (void *)(_y + kernel_map.va_kernel_pa_offset + XIP_OFFSET); \ }) #define __pa_to_va_nodebug(x) linear_mapping_pa_to_va(x) #ifndef CONFIG_DEBUG_VIRTUAL #define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset) #else phys_addr_t linear_mapping_va_to_pa(unsigned long x); #endif #define kernel_mapping_va_to_pa(y) ({ \ unsigned long _y = (unsigned long)(y); \ (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < kernel_map.virt_addr + XIP_OFFSET) ? \ (_y - kernel_map.va_kernel_xip_pa_offset) : \ (_y - kernel_map.va_kernel_pa_offset - XIP_OFFSET); \ }) #define __va_to_pa_nodebug(x) ({ \ unsigned long _x = x; \ is_linear_mapping(_x) ? \ linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \ }) #ifdef CONFIG_DEBUG_VIRTUAL extern phys_addr_t __virt_to_phys(unsigned long x); extern phys_addr_t __phys_addr_symbol(unsigned long x); #else #define __virt_to_phys(x) __va_to_pa_nodebug(x) #define __phys_addr_symbol(x) __va_to_pa_nodebug(x) #endif /* CONFIG_DEBUG_VIRTUAL */ #define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0)) #define __pa(x) __virt_to_phys((unsigned long)(x)) #define __va(x) ((void *)__pa_to_va_nodebug((phys_addr_t)(x))) #define phys_to_pfn(phys) (PFN_DOWN(phys)) #define pfn_to_phys(pfn) (PFN_PHYS(pfn)) #define virt_to_pfn(vaddr) (phys_to_pfn(__pa(vaddr))) #define pfn_to_virt(pfn) (__va(pfn_to_phys(pfn))) #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr))) #define page_to_virt(page) (pfn_to_virt(page_to_pfn(page))) #define page_to_phys(page) (pfn_to_phys(page_to_pfn(page))) #define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr))) #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) #endif /* __ASSEMBLY__ */ #define virt_addr_valid(vaddr) ({ \ unsigned long _addr = (unsigned long)vaddr; \ (unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \ }) #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> #endif /* _ASM_RISCV_PAGE_H */ |