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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 | /* * Based on arch/arm/include/asm/memory.h * * Copyright (C) 2000-2002 Russell King * Copyright (C) 2012 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Note: this file should not be included by non-asm/.h files */ #ifndef __ASM_MEMORY_H #define __ASM_MEMORY_H #include <linux/compiler.h> #include <linux/const.h> #include <linux/types.h> #include <asm/bug.h> #include <asm/sizes.h> /* * Allow for constants defined here to be used from assembly code * by prepending the UL suffix only with actual C code compilation. */ #define UL(x) _AC(x, UL) /* * Size of the PCI I/O space. This must remain a power of two so that * IO_SPACE_LIMIT acts as a mask for the low bits of I/O addresses. */ #define PCI_IO_SIZE SZ_16M /* * Log2 of the upper bound of the size of a struct page. Used for sizing * the vmemmap region only, does not affect actual memory footprint. * We don't use sizeof(struct page) directly since taking its size here * requires its definition to be available at this point in the inclusion * chain, and it may not be a power of 2 in the first place. */ #define STRUCT_PAGE_MAX_SHIFT 6 /* * VMEMMAP_SIZE - allows the whole linear region to be covered by * a struct page array */ #define VMEMMAP_SIZE (UL(1) << (VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT)) /* * PAGE_OFFSET - the virtual address of the start of the linear map (top * (VA_BITS - 1)) * KIMAGE_VADDR - the virtual address of the start of the kernel image * VA_BITS - the maximum number of bits for virtual addresses. * VA_START - the first kernel virtual address. * TASK_SIZE - the maximum size of a user space task. * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area. */ #define VA_BITS ([31mCONFIG_ARM64_VA_BITS[0m) #define VA_START (UL(0xffffffffffffffff) << VA_BITS) #define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1)) #define KIMAGE_VADDR (MODULES_END) #define MODULES_END (MODULES_VADDR + MODULES_VSIZE) #define MODULES_VADDR (VA_START + KASAN_SHADOW_SIZE) #define MODULES_VSIZE (SZ_128M) #define VMEMMAP_START (PAGE_OFFSET - VMEMMAP_SIZE) #define PCI_IO_END (VMEMMAP_START - SZ_2M) #define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE) #define FIXADDR_TOP (PCI_IO_START - SZ_2M) #define TASK_SIZE_64 (UL(1) << VA_BITS) #ifdef [31mCONFIG_COMPAT[0m #define TASK_SIZE_32 UL(0x100000000) #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \ TASK_SIZE_32 : TASK_SIZE_64) #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \ TASK_SIZE_32 : TASK_SIZE_64) #else #define TASK_SIZE TASK_SIZE_64 #endif /* CONFIG_COMPAT */ #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 4)) #define KERNEL_START _text #define KERNEL_END _end /* * The size of the KASAN shadow region. This should be 1/8th of the * size of the entire kernel virtual address space. */ #ifdef [31mCONFIG_KASAN[0m #define KASAN_SHADOW_SIZE (UL(1) << (VA_BITS - 3)) #else #define KASAN_SHADOW_SIZE (0) #endif /* * Physical vs virtual RAM address space conversion. These are * private definitions which should NOT be used outside memory.h * files. Use virt_to_phys/phys_to_virt/__pa/__va instead. */ #define __virt_to_phys(x) ({ \ phys_addr_t __x = (phys_addr_t)(x); \ __x & BIT(VA_BITS - 1) ? (__x & ~PAGE_OFFSET) + PHYS_OFFSET : \ (__x - kimage_voffset); }) #define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET) | PAGE_OFFSET) #define __phys_to_kimg(x) ((unsigned long)((x) + kimage_voffset)) /* * Convert a page to/from a physical address */ #define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page))) #define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys))) /* * Memory types available. */ #define MT_DEVICE_nGnRnE 0 #define MT_DEVICE_nGnRE 1 #define MT_DEVICE_GRE 2 #define MT_NORMAL_NC 3 #define MT_NORMAL 4 #define MT_NORMAL_WT 5 /* * Memory types for Stage-2 translation */ #define MT_S2_NORMAL 0xf #define MT_S2_DEVICE_nGnRE 0x1 #ifdef [31mCONFIG_ARM64_4K_PAGES[0m #define IOREMAP_MAX_ORDER (PUD_SHIFT) #else #define IOREMAP_MAX_ORDER (PMD_SHIFT) #endif #ifdef [31mCONFIG_BLK_DEV_INITRD[0m #define __early_init_dt_declare_initrd(__start, __end) \ do { \ initrd_start = (__start); \ initrd_end = (__end); \ } while (0) #endif #ifndef __ASSEMBLY__ #include <linux/bitops.h> #include <linux/mmdebug.h> extern s64 memstart_addr; /* PHYS_OFFSET - the physical address of the start of memory. */ #define PHYS_OFFSET ({ VM_BUG_ON(memstart_addr & 1); memstart_addr; }) /* the virtual base of the kernel image (minus TEXT_OFFSET) */ extern u64 kimage_vaddr; /* the offset between the kernel virtual and physical mappings */ extern u64 kimage_voffset; static inline unsigned long kaslr_offset(void) { return kimage_vaddr - KIMAGE_VADDR; } /* * Allow all memory at the discovery stage. We will clip it later. */ #define MIN_MEMBLOCK_ADDR 0 #define MAX_MEMBLOCK_ADDR U64_MAX /* * PFNs are used to describe any physical page; this means * PFN 0 == physical address 0. * * This is the PFN of the first RAM page in the kernel * direct-mapped view. We assume this is the first page * of RAM in the mem_map as well. */ #define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT) /* * Note: Drivers should NOT use these. They are the wrong * translation for translating DMA addresses. Use the driver * DMA support - see dma-mapping.h. */ #define virt_to_phys virt_to_phys static inline phys_addr_t virt_to_phys(const volatile void *x) { return __virt_to_phys((unsigned long)(x)); } #define phys_to_virt phys_to_virt static inline void *phys_to_virt(phys_addr_t x) { return (void *)(__phys_to_virt(x)); } /* * Drivers should NOT use these either. */ #define __pa(x) __virt_to_phys((unsigned long)(x)) #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys(x)) /* * virt_to_page(k) convert a _valid_ virtual address to struct page * * virt_addr_valid(k) indicates whether a virtual address is valid */ #define ARCH_PFN_OFFSET ((unsigned long)PHYS_PFN_OFFSET) #ifndef [31mCONFIG_SPARSEMEM_VMEMMAP[0m #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define _virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #else #define __virt_to_pgoff(kaddr) (((u64)(kaddr) & ~PAGE_OFFSET) / PAGE_SIZE * sizeof(struct page)) #define __page_to_voff(kaddr) (((u64)(kaddr) & ~VMEMMAP_START) * PAGE_SIZE / sizeof(struct page)) #define page_to_virt(page) ((void *)((__page_to_voff(page)) | PAGE_OFFSET)) #define virt_to_page(vaddr) ((struct page *)((__virt_to_pgoff(vaddr)) | VMEMMAP_START)) #define _virt_addr_valid(kaddr) pfn_valid((((u64)(kaddr) & ~PAGE_OFFSET) \ + PHYS_OFFSET) >> PAGE_SHIFT) #endif #endif #define _virt_addr_is_linear(kaddr) (((u64)(kaddr)) >= PAGE_OFFSET) #define virt_addr_valid(kaddr) (_virt_addr_is_linear(kaddr) && \ _virt_addr_valid(kaddr)) #include <asm-generic/memory_model.h> #endif |