1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * Copyright (c) 1994 John S. Dyson 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * from: FreeBSD: src/sys/i386/include/vmparam.h,v 1.33 2000/03/30 34 */ 35 36 #ifdef __arm__ 37 #include <arm/vmparam.h> 38 #else /* !__arm__ */ 39 40 #ifndef _MACHINE_VMPARAM_H_ 41 #define _MACHINE_VMPARAM_H_ 42 43 /* 44 * Virtual memory related constants, all in bytes 45 */ 46 #ifndef MAXTSIZ 47 #define MAXTSIZ (1*1024*1024*1024) /* max text size */ 48 #endif 49 #ifndef DFLDSIZ 50 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 51 #endif 52 #ifndef MAXDSIZ 53 #define MAXDSIZ (1*1024*1024*1024) /* max data size */ 54 #endif 55 #ifndef DFLSSIZ 56 #define DFLSSIZ (128*1024*1024) /* initial stack size limit */ 57 #endif 58 #ifndef MAXSSIZ 59 #define MAXSSIZ (1*1024*1024*1024) /* max stack size */ 60 #endif 61 #ifndef SGROWSIZ 62 #define SGROWSIZ (128*1024) /* amount to grow stack */ 63 #endif 64 65 /* 66 * The physical address space is sparsely populated. 67 */ 68 #define VM_PHYSSEG_SPARSE 69 70 /* 71 * The number of PHYSSEG entries. 72 */ 73 #define VM_PHYSSEG_MAX 64 74 75 /* 76 * Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool 77 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 78 * the pool from which physical pages for small UMA objects are 79 * allocated. 80 */ 81 #define VM_NFREEPOOL 2 82 #define VM_FREEPOOL_DEFAULT 0 83 #define VM_FREEPOOL_DIRECT 1 84 85 /* 86 * Create two free page lists: VM_FREELIST_DMA32 is for physical pages that have 87 * physical addresses below 4G, and VM_FREELIST_DEFAULT is for all other 88 * physical pages. 89 */ 90 #define VM_NFREELIST 2 91 #define VM_FREELIST_DEFAULT 0 92 #define VM_FREELIST_DMA32 1 93 94 /* 95 * When PAGE_SIZE is 4KB, an allocation size of 16MB is supported in order 96 * to optimize the use of the direct map by UMA. Specifically, a 64-byte 97 * cache line contains at most 8 L2 BLOCK entries, collectively mapping 16MB 98 * of physical memory. By reducing the number of distinct 16MB "pages" that 99 * are used by UMA, the physical memory allocator reduces the likelihood of 100 * both 2MB page TLB misses and cache misses during the page table walk when 101 * a 2MB page TLB miss does occur. 102 * 103 * When PAGE_SIZE is 16KB, an allocation size of 32MB is supported. This 104 * size is used by level 0 reservations and L2 BLOCK mappings. 105 */ 106 #if PAGE_SIZE == PAGE_SIZE_4K 107 #define VM_NFREEORDER 13 108 #elif PAGE_SIZE == PAGE_SIZE_16K 109 #define VM_NFREEORDER 12 110 #else 111 #error Unsupported page size 112 #endif 113 114 /* 115 * Enable superpage reservations: 1 level. 116 */ 117 #ifndef VM_NRESERVLEVEL 118 #define VM_NRESERVLEVEL 1 119 #endif 120 121 /* 122 * Level 0 reservations consist of 512 pages when PAGE_SIZE is 4KB, and 123 * 2048 pages when PAGE_SIZE is 16KB. 124 */ 125 #ifndef VM_LEVEL_0_ORDER 126 #if PAGE_SIZE == PAGE_SIZE_4K 127 #define VM_LEVEL_0_ORDER 9 128 #elif PAGE_SIZE == PAGE_SIZE_16K 129 #define VM_LEVEL_0_ORDER 11 130 #else 131 #error Unsupported page size 132 #endif 133 #endif 134 135 /** 136 * Address space layout. 137 * 138 * ARMv8 implements up to a 48 bit virtual address space. The address space is 139 * split into 2 regions at each end of the 64 bit address space, with an 140 * out of range "hole" in the middle. 141 * 142 * We use the full 48 bits for each region, however the kernel may only use 143 * a limited range within this space. 144 * 145 * Upper region: 0xffffffffffffffff Top of virtual memory 146 * 147 * 0xfffffeffffffffff End of DMAP 148 * 0xffffa00000000000 Start of DMAP 149 * 150 * 0xffff027fffffffff End of KMSAN origin map 151 * 0xffff020000000000 Start of KMSAN origin map 152 * 153 * 0xffff017fffffffff End of KMSAN shadow map 154 * 0xffff010000000000 Start of KMSAN shadow map 155 * 156 * 0xffff009fffffffff End of KASAN shadow map 157 * 0xffff008000000000 Start of KASAN shadow map 158 * 159 * 0xffff007fffffffff End of KVA 160 * 0xffff000000000000 Kernel base address & start of KVA 161 * 162 * Hole: 0xfffeffffffffffff 163 * 0x0001000000000000 164 * 165 * Lower region: 0x0000ffffffffffff End of user address space 166 * 0x0000000000000000 Start of user address space 167 * 168 * We use the upper region for the kernel, and the lower region for userland. 169 * 170 * We define some interesting address constants: 171 * 172 * VM_MIN_ADDRESS and VM_MAX_ADDRESS define the start and end of the entire 173 * 64 bit address space, mostly just for convenience. 174 * 175 * VM_MIN_KERNEL_ADDRESS and VM_MAX_KERNEL_ADDRESS define the start and end of 176 * mappable kernel virtual address space. 177 * 178 * VM_MIN_USER_ADDRESS and VM_MAX_USER_ADDRESS define the start and end of the 179 * user address space. 180 */ 181 #define VM_MIN_ADDRESS (0x0000000000000000UL) 182 #define VM_MAX_ADDRESS (0xffffffffffffffffUL) 183 184 /* 512 GiB of kernel addresses */ 185 #define VM_MIN_KERNEL_ADDRESS (0xffff000000000000UL) 186 #define VM_MAX_KERNEL_ADDRESS (0xffff008000000000UL) 187 188 /* 128 GiB KASAN shadow map */ 189 #define KASAN_MIN_ADDRESS (0xffff008000000000UL) 190 #define KASAN_MAX_ADDRESS (0xffff00a000000000UL) 191 192 /* 512GiB KMSAN shadow map */ 193 #define KMSAN_SHAD_MIN_ADDRESS (0xffff010000000000UL) 194 #define KMSAN_SHAD_MAX_ADDRESS (0xffff018000000000UL) 195 196 /* 512GiB KMSAN origin map */ 197 #define KMSAN_ORIG_MIN_ADDRESS (0xffff020000000000UL) 198 #define KMSAN_ORIG_MAX_ADDRESS (0xffff028000000000UL) 199 200 /* The address bits that hold a pointer authentication code */ 201 #define PAC_ADDR_MASK (0xff7f000000000000UL) 202 203 /* If true addr is in the kernel address space */ 204 #define ADDR_IS_KERNEL(addr) (((addr) & (1ul << 55)) == (1ul << 55)) 205 /* If true addr is in its canonical form (i.e. no TBI, PAC, etc.) */ 206 #define ADDR_IS_CANONICAL(addr) \ 207 (((addr) & 0xffff000000000000UL) == 0 || \ 208 ((addr) & 0xffff000000000000UL) == 0xffff000000000000UL) 209 #define ADDR_MAKE_CANONICAL(addr) ({ \ 210 __typeof(addr) _tmp_addr = (addr); \ 211 \ 212 _tmp_addr &= ~0xffff000000000000UL; \ 213 if (ADDR_IS_KERNEL(addr)) \ 214 _tmp_addr |= 0xffff000000000000UL; \ 215 \ 216 _tmp_addr; \ 217 }) 218 219 /* 95 TiB maximum for the direct map region */ 220 #define DMAP_MIN_ADDRESS (0xffffa00000000000UL) 221 #define DMAP_MAX_ADDRESS (0xffffff0000000000UL) 222 223 #define DMAP_MIN_PHYSADDR (dmap_phys_base) 224 #define DMAP_MAX_PHYSADDR (dmap_phys_max) 225 226 /* True if pa is in the dmap range */ 227 #define PHYS_IN_DMAP(pa) ((pa) >= DMAP_MIN_PHYSADDR && \ 228 (pa) < DMAP_MAX_PHYSADDR) 229 /* True if va is in the dmap range */ 230 #define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \ 231 (va) < (dmap_max_addr)) 232 233 #define PMAP_HAS_DMAP 1 234 #define PHYS_TO_DMAP(pa) \ 235 ({ \ 236 KASSERT(PHYS_IN_DMAP(pa), \ 237 ("%s: PA out of range, PA: 0x%lx", __func__, \ 238 (vm_paddr_t)(pa))); \ 239 ((pa) - dmap_phys_base) + DMAP_MIN_ADDRESS; \ 240 }) 241 242 #define DMAP_TO_PHYS(va) \ 243 ({ \ 244 KASSERT(VIRT_IN_DMAP(va), \ 245 ("%s: VA out of range, VA: 0x%lx", __func__, \ 246 (vm_offset_t)(va))); \ 247 ((va) - DMAP_MIN_ADDRESS) + dmap_phys_base; \ 248 }) 249 250 #define VM_MIN_USER_ADDRESS (0x0000000000000000UL) 251 #define VM_MAX_USER_ADDRESS (0x0001000000000000UL) 252 253 #define VM_MINUSER_ADDRESS (VM_MIN_USER_ADDRESS) 254 #define VM_MAXUSER_ADDRESS (VM_MAX_USER_ADDRESS) 255 256 #define KERNBASE (VM_MIN_KERNEL_ADDRESS) 257 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) 258 #define USRSTACK SHAREDPAGE 259 260 /* 261 * How many physical pages per kmem arena virtual page. 262 */ 263 #ifndef VM_KMEM_SIZE_SCALE 264 #define VM_KMEM_SIZE_SCALE (1) 265 #endif 266 267 /* 268 * Optional ceiling (in bytes) on the size of the kmem arena: 60% of the 269 * kernel map. 270 */ 271 #ifndef VM_KMEM_SIZE_MAX 272 #define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \ 273 VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5) 274 #endif 275 276 /* 277 * Initial pagein size of beginning of executable file. 278 */ 279 #ifndef VM_INITIAL_PAGEIN 280 #define VM_INITIAL_PAGEIN 16 281 #endif 282 283 #if !defined(KASAN) && !defined(KMSAN) 284 #define UMA_MD_SMALL_ALLOC 285 #endif 286 287 #ifndef LOCORE 288 289 extern vm_paddr_t dmap_phys_base; 290 extern vm_paddr_t dmap_phys_max; 291 extern vm_offset_t dmap_max_addr; 292 extern vm_offset_t vm_max_kernel_address; 293 294 #endif 295 296 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 297 298 #define DEVMAP_MAX_VADDR VM_MAX_KERNEL_ADDRESS 299 300 /* 301 * The pmap can create non-transparent large page mappings. 302 */ 303 #define PMAP_HAS_LARGEPAGES 1 304 305 /* 306 * Need a page dump array for minidump. 307 */ 308 #define MINIDUMP_PAGE_TRACKING 1 309 310 #endif /* !_MACHINE_VMPARAM_H_ */ 311 312 #endif /* !__arm__ */ 313