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 #define VM_NFREEORDER 13 104 105 /* 106 * Enable superpage reservations: 1 level. 107 */ 108 #ifndef VM_NRESERVLEVEL 109 #define VM_NRESERVLEVEL 1 110 #endif 111 112 /* 113 * Level 0 reservations consist of 512 pages. 114 */ 115 #ifndef VM_LEVEL_0_ORDER 116 #define VM_LEVEL_0_ORDER 9 117 #endif 118 119 /** 120 * Address space layout. 121 * 122 * ARMv8 implements up to a 48 bit virtual address space. The address space is 123 * split into 2 regions at each end of the 64 bit address space, with an 124 * out of range "hole" in the middle. 125 * 126 * We use the full 48 bits for each region, however the kernel may only use 127 * a limited range within this space. 128 * 129 * Upper region: 0xffffffffffffffff Top of virtual memory 130 * 131 * 0xfffffeffffffffff End of DMAP 132 * 0xffffa00000000000 Start of DMAP 133 * 134 * 0xffff027fffffffff End of KMSAN origin map 135 * 0xffff020000000000 Start of KMSAN origin map 136 * 137 * 0xffff017fffffffff End of KMSAN shadow map 138 * 0xffff010000000000 Start of KMSAN shadow map 139 * 140 * 0xffff009fffffffff End of KASAN shadow map 141 * 0xffff008000000000 Start of KASAN shadow map 142 * 143 * 0xffff007fffffffff End of KVA 144 * 0xffff000000000000 Kernel base address & start of KVA 145 * 146 * Hole: 0xfffeffffffffffff 147 * 0x0001000000000000 148 * 149 * Lower region: 0x0000ffffffffffff End of user address space 150 * 0x0000000000000000 Start of user address space 151 * 152 * We use the upper region for the kernel, and the lower region for userland. 153 * 154 * We define some interesting address constants: 155 * 156 * VM_MIN_ADDRESS and VM_MAX_ADDRESS define the start and end of the entire 157 * 64 bit address space, mostly just for convenience. 158 * 159 * VM_MIN_KERNEL_ADDRESS and VM_MAX_KERNEL_ADDRESS define the start and end of 160 * mappable kernel virtual address space. 161 * 162 * VM_MIN_USER_ADDRESS and VM_MAX_USER_ADDRESS define the start and end of the 163 * user address space. 164 */ 165 #define VM_MIN_ADDRESS (0x0000000000000000UL) 166 #define VM_MAX_ADDRESS (0xffffffffffffffffUL) 167 168 /* 512 GiB of kernel addresses */ 169 #define VM_MIN_KERNEL_ADDRESS (0xffff000000000000UL) 170 #define VM_MAX_KERNEL_ADDRESS (0xffff008000000000UL) 171 172 /* 128 GiB KASAN shadow map */ 173 #define KASAN_MIN_ADDRESS (0xffff008000000000UL) 174 #define KASAN_MAX_ADDRESS (0xffff00a000000000UL) 175 176 /* 512GiB KMSAN shadow map */ 177 #define KMSAN_SHAD_MIN_ADDRESS (0xffff010000000000UL) 178 #define KMSAN_SHAD_MAX_ADDRESS (0xffff018000000000UL) 179 180 /* 512GiB KMSAN origin map */ 181 #define KMSAN_ORIG_MIN_ADDRESS (0xffff020000000000UL) 182 #define KMSAN_ORIG_MAX_ADDRESS (0xffff028000000000UL) 183 184 /* The address bits that hold a pointer authentication code */ 185 #define PAC_ADDR_MASK (0xff7f000000000000UL) 186 187 /* If true addr is in the kernel address space */ 188 #define ADDR_IS_KERNEL(addr) (((addr) & (1ul << 55)) == (1ul << 55)) 189 /* If true addr is in its canonical form (i.e. no TBI, PAC, etc.) */ 190 #define ADDR_IS_CANONICAL(addr) \ 191 (((addr) & 0xffff000000000000UL) == 0 || \ 192 ((addr) & 0xffff000000000000UL) == 0xffff000000000000UL) 193 #define ADDR_MAKE_CANONICAL(addr) ({ \ 194 __typeof(addr) _tmp_addr = (addr); \ 195 \ 196 _tmp_addr &= ~0xffff000000000000UL; \ 197 if (ADDR_IS_KERNEL(addr)) \ 198 _tmp_addr |= 0xffff000000000000UL; \ 199 \ 200 _tmp_addr; \ 201 }) 202 203 /* 95 TiB maximum for the direct map region */ 204 #define DMAP_MIN_ADDRESS (0xffffa00000000000UL) 205 #define DMAP_MAX_ADDRESS (0xffffff0000000000UL) 206 207 #define DMAP_MIN_PHYSADDR (dmap_phys_base) 208 #define DMAP_MAX_PHYSADDR (dmap_phys_max) 209 210 /* True if pa is in the dmap range */ 211 #define PHYS_IN_DMAP(pa) ((pa) >= DMAP_MIN_PHYSADDR && \ 212 (pa) < DMAP_MAX_PHYSADDR) 213 /* True if va is in the dmap range */ 214 #define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \ 215 (va) < (dmap_max_addr)) 216 217 #define PMAP_HAS_DMAP 1 218 #define PHYS_TO_DMAP(pa) \ 219 ({ \ 220 KASSERT(PHYS_IN_DMAP(pa), \ 221 ("%s: PA out of range, PA: 0x%lx", __func__, \ 222 (vm_paddr_t)(pa))); \ 223 ((pa) - dmap_phys_base) + DMAP_MIN_ADDRESS; \ 224 }) 225 226 #define DMAP_TO_PHYS(va) \ 227 ({ \ 228 KASSERT(VIRT_IN_DMAP(va), \ 229 ("%s: VA out of range, VA: 0x%lx", __func__, \ 230 (vm_offset_t)(va))); \ 231 ((va) - DMAP_MIN_ADDRESS) + dmap_phys_base; \ 232 }) 233 234 #define VM_MIN_USER_ADDRESS (0x0000000000000000UL) 235 #define VM_MAX_USER_ADDRESS (0x0001000000000000UL) 236 237 #define VM_MINUSER_ADDRESS (VM_MIN_USER_ADDRESS) 238 #define VM_MAXUSER_ADDRESS (VM_MAX_USER_ADDRESS) 239 240 #define KERNBASE (VM_MIN_KERNEL_ADDRESS) 241 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) 242 #define USRSTACK SHAREDPAGE 243 244 /* 245 * How many physical pages per kmem arena virtual page. 246 */ 247 #ifndef VM_KMEM_SIZE_SCALE 248 #define VM_KMEM_SIZE_SCALE (1) 249 #endif 250 251 /* 252 * Optional ceiling (in bytes) on the size of the kmem arena: 60% of the 253 * kernel map. 254 */ 255 #ifndef VM_KMEM_SIZE_MAX 256 #define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \ 257 VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5) 258 #endif 259 260 /* 261 * Initial pagein size of beginning of executable file. 262 */ 263 #ifndef VM_INITIAL_PAGEIN 264 #define VM_INITIAL_PAGEIN 16 265 #endif 266 267 #if !defined(KASAN) && !defined(KMSAN) 268 #define UMA_MD_SMALL_ALLOC 269 #endif 270 271 #ifndef LOCORE 272 273 extern vm_paddr_t dmap_phys_base; 274 extern vm_paddr_t dmap_phys_max; 275 extern vm_offset_t dmap_max_addr; 276 extern vm_offset_t vm_max_kernel_address; 277 278 #endif 279 280 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 281 282 #define DEVMAP_MAX_VADDR VM_MAX_KERNEL_ADDRESS 283 284 /* 285 * The pmap can create non-transparent large page mappings. 286 */ 287 #define PMAP_HAS_LARGEPAGES 1 288 289 /* 290 * Need a page dump array for minidump. 291 */ 292 #define MINIDUMP_PAGE_TRACKING 1 293 294 #endif /* !_MACHINE_VMPARAM_H_ */ 295 296 #endif /* !__arm__ */ 297