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 * 34 * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91 35 * from: FreeBSD: src/sys/i386/include/vmparam.h,v 1.33 2000/03/30 36 */ 37 38 #ifdef __arm__ 39 #include <arm/vmparam.h> 40 #else /* !__arm__ */ 41 42 #ifndef _MACHINE_VMPARAM_H_ 43 #define _MACHINE_VMPARAM_H_ 44 45 /* 46 * Virtual memory related constants, all in bytes 47 */ 48 #ifndef MAXTSIZ 49 #define MAXTSIZ (1*1024*1024*1024) /* max text size */ 50 #endif 51 #ifndef DFLDSIZ 52 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 53 #endif 54 #ifndef MAXDSIZ 55 #define MAXDSIZ (1*1024*1024*1024) /* max data size */ 56 #endif 57 #ifndef DFLSSIZ 58 #define DFLSSIZ (128*1024*1024) /* initial stack size limit */ 59 #endif 60 #ifndef MAXSSIZ 61 #define MAXSSIZ (1*1024*1024*1024) /* max stack size */ 62 #endif 63 #ifndef SGROWSIZ 64 #define SGROWSIZ (128*1024) /* amount to grow stack */ 65 #endif 66 67 /* 68 * The physical address space is sparsely populated. 69 */ 70 #define VM_PHYSSEG_SPARSE 71 72 /* 73 * The number of PHYSSEG entries. 74 */ 75 #define VM_PHYSSEG_MAX 64 76 77 /* 78 * Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool 79 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 80 * the pool from which physical pages for small UMA objects are 81 * allocated. 82 */ 83 #define VM_NFREEPOOL 2 84 #define VM_FREEPOOL_DEFAULT 0 85 #define VM_FREEPOOL_DIRECT 1 86 87 /* 88 * Create two free page lists: VM_FREELIST_DMA32 is for physical pages that have 89 * physical addresses below 4G, and VM_FREELIST_DEFAULT is for all other 90 * physical pages. 91 */ 92 #define VM_NFREELIST 2 93 #define VM_FREELIST_DEFAULT 0 94 #define VM_FREELIST_DMA32 1 95 96 /* 97 * When PAGE_SIZE is 4KB, an allocation size of 16MB is supported in order 98 * to optimize the use of the direct map by UMA. Specifically, a 64-byte 99 * cache line contains at most 8 L2 BLOCK entries, collectively mapping 16MB 100 * of physical memory. By reducing the number of distinct 16MB "pages" that 101 * are used by UMA, the physical memory allocator reduces the likelihood of 102 * both 2MB page TLB misses and cache misses during the page table walk when 103 * a 2MB page TLB miss does occur. 104 */ 105 #define VM_NFREEORDER 13 106 107 /* 108 * Enable superpage reservations: 1 level. 109 */ 110 #ifndef VM_NRESERVLEVEL 111 #define VM_NRESERVLEVEL 1 112 #endif 113 114 /* 115 * Level 0 reservations consist of 512 pages. 116 */ 117 #ifndef VM_LEVEL_0_ORDER 118 #define VM_LEVEL_0_ORDER 9 119 #endif 120 121 /** 122 * Address space layout. 123 * 124 * ARMv8 implements up to a 48 bit virtual address space. The address space is 125 * split into 2 regions at each end of the 64 bit address space, with an 126 * out of range "hole" in the middle. 127 * 128 * We use the full 48 bits for each region, however the kernel may only use 129 * a limited range within this space. 130 * 131 * Upper region: 0xffffffffffffffff Top of virtual memory 132 * 133 * 0xfffffeffffffffff End of DMAP 134 * 0xffffa00000000000 Start of DMAP 135 * 136 * 0xffff009fffffffff End of KASAN shadow map 137 * 0xffff008000000000 Start of KASAN shadow map 138 * 139 * 0xffff007fffffffff End of KVA 140 * 0xffff000000000000 Kernel base address & start of KVA 141 * 142 * Hole: 0xfffeffffffffffff 143 * 0x0001000000000000 144 * 145 * Lower region: 0x0000ffffffffffff End of user address space 146 * 0x0000000000000000 Start of user address space 147 * 148 * We use the upper region for the kernel, and the lower region for userland. 149 * 150 * We define some interesting address constants: 151 * 152 * VM_MIN_ADDRESS and VM_MAX_ADDRESS define the start and end of the entire 153 * 64 bit address space, mostly just for convenience. 154 * 155 * VM_MIN_KERNEL_ADDRESS and VM_MAX_KERNEL_ADDRESS define the start and end of 156 * mappable kernel virtual address space. 157 * 158 * VM_MIN_USER_ADDRESS and VM_MAX_USER_ADDRESS define the start and end of the 159 * user address space. 160 */ 161 #define VM_MIN_ADDRESS (0x0000000000000000UL) 162 #define VM_MAX_ADDRESS (0xffffffffffffffffUL) 163 164 /* 512 GiB of kernel addresses */ 165 #define VM_MIN_KERNEL_ADDRESS (0xffff000000000000UL) 166 #define VM_MAX_KERNEL_ADDRESS (0xffff008000000000UL) 167 168 /* 128 GiB KASAN shadow map */ 169 #define KASAN_MIN_ADDRESS (0xffff008000000000UL) 170 #define KASAN_MAX_ADDRESS (0xffff00a000000000UL) 171 172 /* The address bits that hold a pointer authentication code */ 173 #define PAC_ADDR_MASK (0xff7f000000000000UL) 174 175 /* If true addr is in the kernel address space */ 176 #define ADDR_IS_KERNEL(addr) (((addr) & (1ul << 55)) == (1ul << 55)) 177 /* If true addr is in its canonical form (i.e. no TBI, PAC, etc.) */ 178 #define ADDR_IS_CANONICAL(addr) \ 179 (((addr) & 0xffff000000000000UL) == 0 || \ 180 ((addr) & 0xffff000000000000UL) == 0xffff000000000000UL) 181 #define ADDR_MAKE_CANONICAL(addr) ({ \ 182 __typeof(addr) _tmp_addr = (addr); \ 183 \ 184 _tmp_addr &= ~0xffff000000000000UL; \ 185 if (ADDR_IS_KERNEL(addr)) \ 186 _tmp_addr |= 0xffff000000000000UL; \ 187 \ 188 _tmp_addr; \ 189 }) 190 191 /* 95 TiB maximum for the direct map region */ 192 #define DMAP_MIN_ADDRESS (0xffffa00000000000UL) 193 #define DMAP_MAX_ADDRESS (0xffffff0000000000UL) 194 195 #define DMAP_MIN_PHYSADDR (dmap_phys_base) 196 #define DMAP_MAX_PHYSADDR (dmap_phys_max) 197 198 /* 199 * Checks to see if a physical address is in the DMAP range. 200 * - PHYS_IN_DMAP_RANGE will return true that may be within the DMAP range 201 * but not accessible through the DMAP, e.g. device memory between two 202 * DMAP physical address regions. 203 * - PHYS_IN_DMAP will check if DMAP address is mapped before returning true. 204 * 205 * PHYS_IN_DMAP_RANGE should only be used when a check on the address is 206 * performed, e.g. by checking the physical address is within phys_avail, 207 * or checking the virtual address is mapped. 208 */ 209 #define PHYS_IN_DMAP_RANGE(pa) ((pa) >= DMAP_MIN_PHYSADDR && \ 210 (pa) < DMAP_MAX_PHYSADDR) 211 #define PHYS_IN_DMAP(pa) (PHYS_IN_DMAP_RANGE(pa) && \ 212 pmap_klookup(PHYS_TO_DMAP(pa), NULL)) 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_RANGE(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; 276 277 #endif 278 279 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 280 281 #define DEVMAP_MAX_VADDR VM_MAX_KERNEL_ADDRESS 282 283 /* 284 * The pmap can create non-transparent large page mappings. 285 */ 286 #define PMAP_HAS_LARGEPAGES 1 287 288 /* 289 * Need a page dump array for minidump. 290 */ 291 #define MINIDUMP_PAGE_TRACKING 1 292 293 #endif /* !_MACHINE_VMPARAM_H_ */ 294 295 #endif /* !__arm__ */ 296