1 /* 2 * Copyright (c) 2007 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* 29 * FILE_ID: vm_param.h 30 */ 31 32 /* 33 * ARM machine dependent virtual memory parameters. 34 */ 35 36 #ifndef _MACH_ARM_VM_PARAM_H_ 37 #define _MACH_ARM_VM_PARAM_H_ 38 39 #if defined (__arm__) || defined (__arm64__) 40 41 #if defined(XNU_KERNEL_PRIVATE) && defined(__arm64__) 42 #include <arm64/proc_reg.h> 43 #endif 44 45 #if defined(KERNEL_PRIVATE) && __ARM_16K_PG__ 46 #include <arm64/proc_reg.h> 47 #endif 48 49 #if !defined (KERNEL) && !defined (__ASSEMBLER__) 50 #include <mach/vm_page_size.h> 51 #endif 52 53 #define BYTE_SIZE 8 /* byte size in bits */ 54 55 #if defined (KERNEL) 56 57 #ifndef __ASSEMBLER__ 58 59 #ifdef __arm__ 60 #define PAGE_SHIFT_CONST 12 61 #elif defined(__arm64__) 62 extern int PAGE_SHIFT_CONST; 63 #else 64 #error Unsupported arch 65 #endif 66 67 #if defined(KERNEL_PRIVATE) && __ARM_16K_PG__ 68 #define PAGE_SHIFT ARM_PGSHIFT 69 #else 70 #define PAGE_SHIFT PAGE_SHIFT_CONST 71 #endif 72 #define PAGE_SIZE (1 << PAGE_SHIFT) 73 #define PAGE_MASK (PAGE_SIZE-1) 74 75 #define VM_PAGE_SIZE PAGE_SIZE 76 77 #define machine_ptob(x) ((x) << PAGE_SHIFT) 78 79 /* 80 * Defined for the purpose of testing the pmap advertised page 81 * size; this does not necessarily match the hardware page size. 82 */ 83 #define TEST_PAGE_SIZE_16K ((PAGE_SHIFT_CONST == 14)) 84 #define TEST_PAGE_SIZE_4K ((PAGE_SHIFT_CONST == 12)) 85 86 #endif /* !__ASSEMBLER__ */ 87 88 #else 89 90 #define PAGE_SHIFT vm_page_shift 91 #define PAGE_SIZE vm_page_size 92 #define PAGE_MASK vm_page_mask 93 94 #define VM_PAGE_SIZE vm_page_size 95 96 #define machine_ptob(x) ((x) << PAGE_SHIFT) 97 98 #endif 99 100 #define PAGE_MAX_SHIFT 14 101 #define PAGE_MAX_SIZE (1 << PAGE_MAX_SHIFT) 102 #define PAGE_MAX_MASK (PAGE_MAX_SIZE-1) 103 104 #define PAGE_MIN_SHIFT 12 105 #define PAGE_MIN_SIZE (1 << PAGE_MIN_SHIFT) 106 #define PAGE_MIN_MASK (PAGE_MIN_SIZE-1) 107 108 #define VM_MAX_PAGE_ADDRESS MACH_VM_MAX_ADDRESS 109 110 #ifndef __ASSEMBLER__ 111 112 #ifdef MACH_KERNEL_PRIVATE 113 114 #define VM32_SUPPORT 1 115 #define VM32_MIN_ADDRESS ((vm32_offset_t) 0) 116 #define VM32_MAX_ADDRESS ((vm32_offset_t) (VM_MAX_ADDRESS & 0xFFFFFFFF)) 117 118 #endif /* MACH_KERNEL_PRIVATE */ 119 120 #if defined (__arm__) 121 122 #define VM_MIN_ADDRESS ((vm_address_t) 0x00000000) 123 #define VM_MAX_ADDRESS ((vm_address_t) 0x80000000) 124 125 /* system-wide values */ 126 #define MACH_VM_MIN_ADDRESS ((mach_vm_offset_t) 0) 127 #define MACH_VM_MAX_ADDRESS ((mach_vm_offset_t) VM_MAX_ADDRESS) 128 129 #elif defined (__arm64__) 130 131 #define VM_MIN_ADDRESS ((vm_address_t) 0x0000000000000000ULL) 132 #define VM_MAX_ADDRESS ((vm_address_t) 0x00000000F0000000ULL) 133 134 /* system-wide values */ 135 #define MACH_VM_MIN_ADDRESS_RAW 0x0ULL 136 #if defined(XNU_PLATFORM_MacOSX) || defined(XNU_PLATFORM_DriverKit) 137 #define MACH_VM_MAX_ADDRESS_RAW 0x00007FFFFE000000ULL 138 #else 139 #define MACH_VM_MAX_ADDRESS_RAW 0x0000000FC0000000ULL 140 #endif 141 142 #define MACH_VM_MIN_ADDRESS ((mach_vm_offset_t) MACH_VM_MIN_ADDRESS_RAW) 143 #define MACH_VM_MAX_ADDRESS ((mach_vm_offset_t) MACH_VM_MAX_ADDRESS_RAW) 144 145 #define MACH_VM_MIN_GPU_CARVEOUT_ADDRESS_RAW 0x0000001000000000ULL 146 #define MACH_VM_MAX_GPU_CARVEOUT_ADDRESS_RAW 0x0000007000000000ULL 147 #define MACH_VM_MIN_GPU_CARVEOUT_ADDRESS ((mach_vm_offset_t) MACH_VM_MIN_GPU_CARVEOUT_ADDRESS_RAW) 148 #define MACH_VM_MAX_GPU_CARVEOUT_ADDRESS ((mach_vm_offset_t) MACH_VM_MAX_GPU_CARVEOUT_ADDRESS_RAW) 149 150 #else /* defined(__arm64__) */ 151 #error architecture not supported 152 #endif 153 154 #define VM_MAP_MIN_ADDRESS VM_MIN_ADDRESS 155 #define VM_MAP_MAX_ADDRESS VM_MAX_ADDRESS 156 157 #ifdef KERNEL 158 159 #if defined (__arm__) 160 #define VM_KERNEL_POINTER_SIGNIFICANT_BITS 31 161 #define VM_MIN_KERNEL_ADDRESS ((vm_address_t) 0x80000000) 162 #define VM_MAX_KERNEL_ADDRESS ((vm_address_t) 0xFFFEFFFF) 163 #define VM_HIGH_KERNEL_WINDOW ((vm_address_t) 0xFFFE0000) 164 165 #elif defined (__arm64__) 166 /* 167 * kalloc() parameters: 168 * 169 * Historically kalloc's underlying zones were power-of-2 sizes, with a 170 * KALLOC_MINSIZE of 16 bytes. Thus the allocator ensured that 171 * (sizeof == alignof) >= 16 for all kalloc allocations. 172 * 173 * Today kalloc may use zones with intermediate (small) sizes, constrained by 174 * KALLOC_MINSIZE and a minimum alignment, expressed by KALLOC_LOG2_MINALIGN. 175 * 176 * Note that most dynamically allocated data structures contain more than 177 * one int/long/pointer member, so KALLOC_MINSIZE should probably start at 8. 178 */ 179 #define TiB(x) ((0ULL + (x)) << 40) 180 #define GiB(x) ((0ULL + (x)) << 30) 181 #define KALLOC_MINSIZE 16 /* minimum allocation size */ 182 #define KALLOC_LOG2_MINALIGN 4 /* log2 minimum alignment */ 183 184 /* 185 * The minimum and maximum kernel address; some configurations may 186 * constrain the address space further. 187 */ 188 189 #if XNU_KERNEL_PRIVATE 190 #if defined(ARM_LARGE_MEMORY) 191 /* 192 * +-----------------------+--------+--------+------------------------+ 193 * | 0xffff_fe90_0000_0000 |-1472GB | 576GB | KASAN_SHADOW_MIN | 194 * | | | | VM_MAX_KERNEL_ADDRESS | 195 * +-----------------------+--------+--------+------------------------+ 196 * | 0xffff_fe10_0000_0000 |-1984GB | 64GB | PMAP_HEAP_RANGE_START | 197 * +-----------------------+--------+--------+------------------------+ 198 * | 0xffff_fe00_0700_4000 | | | VM_KERNEL_LINK_ADDRESS | 199 * +-----------------------+--------+--------+------------------------+ 200 * | 0xffff_fe00_0000_0000 | -2TB | 0GB | VM_MIN_KERNEL_ADDRESS | 201 * | | | | LOW_GLOBALS | 202 * +-----------------------+--------+--------+------------------------+ 203 */ 204 #define VM_KERNEL_POINTER_SIGNIFICANT_BITS 41 205 206 // Kernel VA space starts at -2TB 207 #define VM_MIN_KERNEL_ADDRESS ((vm_address_t) (0ULL - TiB(2))) 208 209 // 1.25TB for static_memory_region, 512GB for kernel heap, 256GB for KASAN 210 #define VM_MAX_KERNEL_ADDRESS ((vm_address_t) (VM_MIN_KERNEL_ADDRESS + GiB(64) + GiB(512) - 1)) 211 212 #else // ARM_LARGE_MEMORY 213 /* 214 * +-----------------------+--------+--------+------------------------+ 215 * | 0xffff_fffc_0000_0000 | -16GB | 112GB | KASAN_SHADOW_MIN | 216 * | | | | VM_MAX_KERNEL_ADDRESS | 217 * +-----------------------+--------+--------+------------------------+ 218 * | 0xffff_fff0_0700_4000 | | | VM_KERNEL_LINK_ADDRESS | 219 * +-----------------------+--------+--------+------------------------+ 220 * | 0xffff_fff0_0000_0000 | -64GB | 64GB | LOW_GLOBALS | 221 * | | | | PMAP_HEAP_RANGE_START | <= H8 222 * +-----------------------+--------+--------+------------------------+ 223 * | 0xffff_ffe0_0000_0000 | -128GB | 0GB | VM_MIN_KERNEL_ADDRESS | <= H8 224 * +-----------------------+--------+--------+------------------------+ 225 * | 0xffff_ffdc_0000_0000 | -144GB | 0GB | VM_MIN_KERNEL_ADDRESS | >= H9 226 * | | | | PMAP_HEAP_RANGE_START | >= H9 227 * +-----------------------+--------+--------+------------------------+ 228 */ 229 #if defined(KERNEL_INTEGRITY_KTRR) || defined(KERNEL_INTEGRITY_CTRR) 230 #define VM_KERNEL_POINTER_SIGNIFICANT_BITS 38 231 #define VM_MIN_KERNEL_ADDRESS ((vm_address_t) (0ULL - GiB(144))) 232 #else /* defined(KERNEL_INTEGRITY_KTRR) || defined(KERNEL_INTEGRITY_CTRR) */ 233 #define VM_KERNEL_POINTER_SIGNIFICANT_BITS 37 234 #define VM_MIN_KERNEL_ADDRESS ((vm_address_t) 0xffffffe000000000ULL) 235 #endif /* defined(KERNEL_INTEGRITY_KTRR) || defined(KERNEL_INTEGRITY_CTRR) */ 236 #define VM_MAX_KERNEL_ADDRESS ((vm_address_t) 0xfffffffbffffffffULL) 237 238 #endif // ARM_LARGE_MEMORY 239 240 #else // !XNU_KERNEL_PRIVATE 241 // Inform kexts about largest possible kernel address space 242 #define VM_KERNEL_POINTER_SIGNIFICANT_BITS 41 243 #define VM_MIN_KERNEL_ADDRESS ((vm_address_t) (0ULL - TiB(2))) 244 #define VM_MAX_KERNEL_ADDRESS ((vm_address_t) 0xfffffffbffffffffULL) 245 #endif // XNU_KERNEL_PRIVATE 246 #else 247 #error architecture not supported 248 #endif 249 250 #define VM_MIN_KERNEL_AND_KEXT_ADDRESS VM_MIN_KERNEL_ADDRESS 251 252 #if defined (__arm64__) 253 /* Top-Byte-Ignore */ 254 #define TBI_MASK 0xff00000000000000ULL 255 #define tbi_clear(addr) ((typeof (addr))(((uintptr_t)(addr)) &~ (TBI_MASK))) 256 #define tbi_fill(addr) ((typeof (addr))(((uintptr_t)(addr)) | (TBI_MASK))) 257 #endif /* __arm64__ */ 258 259 #if CONFIG_KERNEL_TBI 260 /* 261 * 'strip' in PAC sense, therefore replacing the stripped bits sign extending 262 * the sign bit. 263 */ 264 #define VM_KERNEL_TBI_FILL(_v) (tbi_fill(_v)) 265 #define VM_KERNEL_TBI_CLEAR(_v) (tbi_clear(_v)) 266 #define VM_KERNEL_STRIP_TBI(_v) (VM_KERNEL_TBI_FILL(_v)) 267 #else /* CONFIG_KERNEL_TBI */ 268 #define VM_KERNEL_TBI_FILL(_v) (_v) 269 #define VM_KERNEL_TBI_CLEAR(_v) (_v) 270 #define VM_KERNEL_STRIP_TBI(_v) (_v) 271 #endif /* CONFIG_KERNE_TBI */ 272 273 #if __has_feature(ptrauth_calls) 274 #include <ptrauth.h> 275 #define VM_KERNEL_STRIP_PAC(_v) (ptrauth_strip((void *)(uintptr_t)(_v), ptrauth_key_asia)) 276 #else /* !ptrauth_calls */ 277 #define VM_KERNEL_STRIP_PAC(_v) (_v) 278 #endif /* ptrauth_calls */ 279 280 #define VM_KERNEL_STRIP_PTR(_va) ((VM_KERNEL_STRIP_TBI(VM_KERNEL_STRIP_PAC(_va)))) 281 #define VM_KERNEL_STRIP_UPTR(_va) ((vm_address_t)VM_KERNEL_STRIP_PTR((uintptr_t)(_va))) 282 #define VM_KERNEL_ADDRESS(_va) \ 283 ((VM_KERNEL_STRIP_UPTR(_va) >= VM_MIN_KERNEL_ADDRESS) && \ 284 (VM_KERNEL_STRIP_UPTR(_va) <= VM_MAX_KERNEL_ADDRESS)) 285 286 #ifdef MACH_KERNEL_PRIVATE 287 /* 288 * Physical memory is mapped linearly at an offset virtual memory. 289 */ 290 extern unsigned long gVirtBase, gPhysBase, gPhysSize; 291 292 #define isphysmem(a) (((vm_address_t)(a) - gPhysBase) < gPhysSize) 293 #define physmap_enclosed(a) isphysmem(a) 294 295 /* 296 * gPhysBase/Size only represent kernel-managed memory. These globals represent 297 * the actual DRAM base address and size as reported by iBoot through the device 298 * tree. 299 */ 300 #include <stdint.h> 301 extern uint64_t gDramBase, gDramSize; 302 #define is_dram_addr(addr) (((uint64_t)(addr) - gDramBase) < gDramSize) 303 304 #endif /* MACH_KERNEL_PRIVATE */ 305 306 #ifdef XNU_KERNEL_PRIVATE 307 308 #if KASAN 309 /* Increase the stack sizes to account for the redzones that get added to every 310 * stack object. */ 311 # define KERNEL_STACK_SIZE (4*4*4096) 312 #elif DEBUG 313 /** 314 * Increase the stack size to account for less efficient use of stack space when 315 * compiling with -O0. 316 */ 317 # define KERNEL_STACK_SIZE (2*4*4096) 318 #else 319 /* 320 * KERNEL_STACK_MULTIPLIER can be defined externally to get a larger 321 * kernel stack size. For example, adding "-DKERNEL_STACK_MULTIPLIER=2" 322 * helps avoid kernel stack overflows when compiling with "-O0". 323 */ 324 #ifndef KERNEL_STACK_MULTIPLIER 325 #define KERNEL_STACK_MULTIPLIER (1) 326 #endif /* KERNEL_STACK_MULTIPLIER */ 327 # define KERNEL_STACK_SIZE (4*4096*KERNEL_STACK_MULTIPLIER) 328 #endif /* XNU_KERNEL_PRIVATE */ 329 330 #define INTSTACK_SIZE (4*4096) 331 332 #ifdef __arm64__ 333 #define EXCEPSTACK_SIZE (4*4096) 334 #else 335 #define FIQSTACK_SIZE (4096) 336 #endif 337 338 #if defined (__arm__) 339 #define HIGH_EXC_VECTORS ((vm_address_t) 0xFFFF0000) 340 #endif 341 342 /* 343 * TODO: We're hardcoding the expected virtual TEXT base here; 344 * that gives us an ugly dependency on a linker argument in 345 * the make files. Clean this up, so we don't hardcode it 346 * twice; this is nothing but trouble. 347 */ 348 #if defined (__arm__) 349 #define VM_KERNEL_LINK_ADDRESS ((vm_address_t) 0x80000000) 350 #elif defined (__arm64__) 351 /* VM_KERNEL_LINK_ADDRESS defined in makedefs/MakeInc.def for arm64 platforms */ 352 #else 353 #error architecture not supported 354 #endif 355 356 #endif /* MACH_KERNEL_PRIVATE */ 357 #endif /* KERNEL */ 358 359 #endif /* !__ASSEMBLER__ */ 360 361 #define SWI_SYSCALL 0x80 362 363 #endif /* defined (__arm__) || defined (__arm64__) */ 364 365 #endif /* _MACH_ARM_VM_PARAM_H_ */ 366