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 one free page lists: VM_FREELIST_DEFAULT is for all physical 87 * pages. 88 */ 89 #define VM_NFREELIST 1 90 #define VM_FREELIST_DEFAULT 0 91 92 /* 93 * When PAGE_SIZE is 4KB, an allocation size of 16MB is supported in order 94 * to optimize the use of the direct map by UMA. Specifically, a 64-byte 95 * cache line contains at most 8 L2 BLOCK entries, collectively mapping 16MB 96 * of physical memory. By reducing the number of distinct 16MB "pages" that 97 * are used by UMA, the physical memory allocator reduces the likelihood of 98 * both 2MB page TLB misses and cache misses during the page table walk when 99 * a 2MB page TLB miss does occur. 100 */ 101 #define VM_NFREEORDER 13 102 103 /* 104 * Enable superpage reservations: 1 level. 105 */ 106 #ifndef VM_NRESERVLEVEL 107 #define VM_NRESERVLEVEL 1 108 #endif 109 110 /* 111 * Level 0 reservations consist of 512 pages. 112 */ 113 #ifndef VM_LEVEL_0_ORDER 114 #define VM_LEVEL_0_ORDER 9 115 #endif 116 117 /** 118 * Address space layout. 119 * 120 * ARMv8 implements up to a 48 bit virtual address space. The address space is 121 * split into 2 regions at each end of the 64 bit address space, with an 122 * out of range "hole" in the middle. 123 * 124 * We use the full 48 bits for each region, however the kernel may only use 125 * a limited range within this space. 126 * 127 * Upper region: 0xffffffffffffffff Top of virtual memory 128 * 129 * 0xfffffeffffffffff End of DMAP 130 * 0xffffa00000000000 Start of DMAP 131 * 132 * 0xffff009fffffffff End of KASAN shadow map 133 * 0xffff008000000000 Start of KASAN shadow map 134 * 135 * 0xffff007fffffffff End of KVA 136 * 0xffff000000000000 Kernel base address & start of KVA 137 * 138 * Hole: 0xfffeffffffffffff 139 * 0x0001000000000000 140 * 141 * Lower region: 0x0000ffffffffffff End of user address space 142 * 0x0000000000000000 Start of user address space 143 * 144 * We use the upper region for the kernel, and the lower region for userland. 145 * 146 * We define some interesting address constants: 147 * 148 * VM_MIN_ADDRESS and VM_MAX_ADDRESS define the start and end of the entire 149 * 64 bit address space, mostly just for convenience. 150 * 151 * VM_MIN_KERNEL_ADDRESS and VM_MAX_KERNEL_ADDRESS define the start and end of 152 * mappable kernel virtual address space. 153 * 154 * VM_MIN_USER_ADDRESS and VM_MAX_USER_ADDRESS define the start and end of the 155 * user address space. 156 */ 157 #define VM_MIN_ADDRESS (0x0000000000000000UL) 158 #define VM_MAX_ADDRESS (0xffffffffffffffffUL) 159 160 /* 512 GiB of kernel addresses */ 161 #define VM_MIN_KERNEL_ADDRESS (0xffff000000000000UL) 162 #define VM_MAX_KERNEL_ADDRESS (0xffff008000000000UL) 163 164 /* 128 GiB KASAN shadow map */ 165 #define KASAN_MIN_ADDRESS (0xffff008000000000UL) 166 #define KASAN_MAX_ADDRESS (0xffff00a000000000UL) 167 168 /* The address bits that hold a pointer authentication code */ 169 #define PAC_ADDR_MASK (0xff7f000000000000UL) 170 171 /* If true addr is in the kernel address space */ 172 #define ADDR_IS_KERNEL(addr) (((addr) & (1ul << 55)) == (1ul << 55)) 173 /* If true addr is in its canonical form (i.e. no TBI, PAC, etc.) */ 174 #define ADDR_IS_CANONICAL(addr) \ 175 (((addr) & 0xffff000000000000UL) == 0 || \ 176 ((addr) & 0xffff000000000000UL) == 0xffff000000000000UL) 177 #define ADDR_MAKE_CANONICAL(addr) ({ \ 178 __typeof(addr) _tmp_addr = (addr); \ 179 \ 180 _tmp_addr &= ~0xffff000000000000UL; \ 181 if (ADDR_IS_KERNEL(addr)) \ 182 _tmp_addr |= 0xffff000000000000UL; \ 183 \ 184 _tmp_addr; \ 185 }) 186 187 /* 95 TiB maximum for the direct map region */ 188 #define DMAP_MIN_ADDRESS (0xffffa00000000000UL) 189 #define DMAP_MAX_ADDRESS (0xffffff0000000000UL) 190 191 #define DMAP_MIN_PHYSADDR (dmap_phys_base) 192 #define DMAP_MAX_PHYSADDR (dmap_phys_max) 193 194 /* True if pa is in the dmap range */ 195 #define PHYS_IN_DMAP(pa) ((pa) >= DMAP_MIN_PHYSADDR && \ 196 (pa) < DMAP_MAX_PHYSADDR) 197 /* True if va is in the dmap range */ 198 #define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \ 199 (va) < (dmap_max_addr)) 200 201 #define PMAP_HAS_DMAP 1 202 #define PHYS_TO_DMAP(pa) \ 203 ({ \ 204 KASSERT(PHYS_IN_DMAP(pa), \ 205 ("%s: PA out of range, PA: 0x%lx", __func__, \ 206 (vm_paddr_t)(pa))); \ 207 ((pa) - dmap_phys_base) + DMAP_MIN_ADDRESS; \ 208 }) 209 210 #define DMAP_TO_PHYS(va) \ 211 ({ \ 212 KASSERT(VIRT_IN_DMAP(va), \ 213 ("%s: VA out of range, VA: 0x%lx", __func__, \ 214 (vm_offset_t)(va))); \ 215 ((va) - DMAP_MIN_ADDRESS) + dmap_phys_base; \ 216 }) 217 218 #define VM_MIN_USER_ADDRESS (0x0000000000000000UL) 219 #define VM_MAX_USER_ADDRESS (0x0001000000000000UL) 220 221 #define VM_MINUSER_ADDRESS (VM_MIN_USER_ADDRESS) 222 #define VM_MAXUSER_ADDRESS (VM_MAX_USER_ADDRESS) 223 224 #define KERNBASE (VM_MIN_KERNEL_ADDRESS) 225 #define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE) 226 #define USRSTACK SHAREDPAGE 227 228 /* 229 * How many physical pages per kmem arena virtual page. 230 */ 231 #ifndef VM_KMEM_SIZE_SCALE 232 #define VM_KMEM_SIZE_SCALE (1) 233 #endif 234 235 /* 236 * Optional ceiling (in bytes) on the size of the kmem arena: 60% of the 237 * kernel map. 238 */ 239 #ifndef VM_KMEM_SIZE_MAX 240 #define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \ 241 VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5) 242 #endif 243 244 /* 245 * Initial pagein size of beginning of executable file. 246 */ 247 #ifndef VM_INITIAL_PAGEIN 248 #define VM_INITIAL_PAGEIN 16 249 #endif 250 251 #if !defined(KASAN) && !defined(KMSAN) 252 #define UMA_MD_SMALL_ALLOC 253 #endif 254 255 #ifndef LOCORE 256 257 extern vm_paddr_t dmap_phys_base; 258 extern vm_paddr_t dmap_phys_max; 259 extern vm_offset_t dmap_max_addr; 260 extern vm_offset_t vm_max_kernel_address; 261 262 #endif 263 264 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */ 265 266 #define DEVMAP_MAX_VADDR VM_MAX_KERNEL_ADDRESS 267 268 /* 269 * The pmap can create non-transparent large page mappings. 270 */ 271 #define PMAP_HAS_LARGEPAGES 1 272 273 /* 274 * Need a page dump array for minidump. 275 */ 276 #define MINIDUMP_PAGE_TRACKING 1 277 278 #endif /* !_MACHINE_VMPARAM_H_ */ 279 280 #endif /* !__arm__ */ 281