1 /*- 2 * SPDX-License-Identifier: (BSD-3-Clause AND MIT-CMU) 3 * 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * The Mach Operating System project at Carnegie-Mellon University. 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: @(#)vm_init.c 8.1 (Berkeley) 6/11/93 35 * 36 * 37 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 38 * All rights reserved. 39 * 40 * Authors: Avadis Tevanian, Jr., Michael Wayne Young 41 * 42 * Permission to use, copy, modify and distribute this software and 43 * its documentation is hereby granted, provided that both the copyright 44 * notice and this permission notice appear in all copies of the 45 * software, derivative works or modified versions, and any portions 46 * thereof, and that both notices appear in supporting documentation. 47 * 48 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 49 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 50 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 51 * 52 * Carnegie Mellon requests users of this software to return to 53 * 54 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 55 * School of Computer Science 56 * Carnegie Mellon University 57 * Pittsburgh PA 15213-3890 58 * 59 * any improvements or extensions that they make and grant Carnegie the 60 * rights to redistribute these changes. 61 */ 62 63 /* 64 * Initialize the Virtual Memory subsystem. 65 */ 66 67 #include <sys/cdefs.h> 68 __FBSDID("$FreeBSD$"); 69 70 #include <sys/param.h> 71 #include <sys/domainset.h> 72 #include <sys/kernel.h> 73 #include <sys/lock.h> 74 #include <sys/proc.h> 75 #include <sys/rwlock.h> 76 #include <sys/malloc.h> 77 #include <sys/sysctl.h> 78 #include <sys/systm.h> 79 #include <sys/selinfo.h> 80 #include <sys/smp.h> 81 #include <sys/pipe.h> 82 #include <sys/bio.h> 83 #include <sys/buf.h> 84 #include <sys/vmem.h> 85 #include <sys/vmmeter.h> 86 87 #include <vm/vm.h> 88 #include <vm/vm_param.h> 89 #include <vm/vm_kern.h> 90 #include <vm/vm_object.h> 91 #include <vm/vm_page.h> 92 #include <vm/vm_phys.h> 93 #include <vm/vm_pagequeue.h> 94 #include <vm/vm_map.h> 95 #include <vm/vm_pager.h> 96 #include <vm/vm_extern.h> 97 98 extern void uma_startup1(vm_offset_t); 99 100 long physmem; 101 102 /* 103 * System initialization 104 */ 105 static void vm_mem_init(void *); 106 SYSINIT(vm_mem, SI_SUB_VM, SI_ORDER_FIRST, vm_mem_init, NULL); 107 108 /* 109 * vm_init initializes the virtual memory system. 110 * This is done only by the first cpu up. 111 */ 112 static void 113 vm_mem_init(void *dummy) 114 { 115 116 /* 117 * Initialize static domainsets, used by various allocators. 118 */ 119 domainset_init(); 120 121 /* 122 * Initialize resident memory structures. From here on, all physical 123 * memory is accounted for, and we use only virtual addresses. 124 */ 125 vm_set_page_size(); 126 virtual_avail = vm_page_startup(virtual_avail); 127 128 /* 129 * Set an initial domain policy for thread0 so that allocations 130 * can work. 131 */ 132 domainset_zero(); 133 134 /* Bootstrap the kernel memory allocator. */ 135 uma_startup1(virtual_avail); 136 137 /* 138 * Initialize other VM packages 139 */ 140 vmem_startup(); 141 vm_object_init(); 142 vm_map_startup(); 143 kmem_init(virtual_avail, virtual_end); 144 145 kmem_init_zero_region(); 146 pmap_init(); 147 vm_pager_init(); 148 } 149 150 void 151 vm_ksubmap_init(struct kva_md_info *kmi) 152 { 153 vm_offset_t firstaddr; 154 caddr_t v; 155 vm_size_t size = 0; 156 long physmem_est; 157 vm_offset_t minaddr; 158 vm_offset_t maxaddr; 159 160 /* 161 * Allocate space for system data structures. 162 * The first available kernel virtual address is in "v". 163 * As pages of kernel virtual memory are allocated, "v" is incremented. 164 * As pages of memory are allocated and cleared, 165 * "firstaddr" is incremented. 166 */ 167 168 /* 169 * Make two passes. The first pass calculates how much memory is 170 * needed and allocates it. The second pass assigns virtual 171 * addresses to the various data structures. 172 */ 173 firstaddr = 0; 174 again: 175 v = (caddr_t)firstaddr; 176 177 /* 178 * Discount the physical memory larger than the size of kernel_map 179 * to avoid eating up all of KVA space. 180 */ 181 physmem_est = lmin(physmem, btoc(vm_map_max(kernel_map) - 182 vm_map_min(kernel_map))); 183 184 v = kern_vfs_bio_buffer_alloc(v, physmem_est); 185 186 /* 187 * End of first pass, size has been calculated so allocate memory 188 */ 189 if (firstaddr == 0) { 190 size = (vm_size_t)v; 191 #ifdef VM_FREELIST_DMA32 192 /* 193 * Try to protect 32-bit DMAable memory from the largest 194 * early alloc of wired mem. 195 */ 196 firstaddr = kmem_alloc_attr(size, M_ZERO | M_NOWAIT, 197 (vm_paddr_t)1 << 32, ~(vm_paddr_t)0, VM_MEMATTR_DEFAULT); 198 if (firstaddr == 0) 199 #endif 200 firstaddr = kmem_malloc(size, M_ZERO | M_WAITOK); 201 if (firstaddr == 0) 202 panic("startup: no room for tables"); 203 goto again; 204 } 205 206 /* 207 * End of second pass, addresses have been assigned 208 */ 209 if ((vm_size_t)((char *)v - firstaddr) != size) 210 panic("startup: table size inconsistency"); 211 212 /* 213 * Allocate the clean map to hold all of I/O virtual memory. 214 */ 215 size = (long)nbuf * BKVASIZE + (long)bio_transient_maxcnt * maxphys; 216 kmi->clean_sva = firstaddr = kva_alloc(size); 217 kmi->clean_eva = firstaddr + size; 218 219 /* 220 * Allocate the buffer arena. 221 * 222 * Enable the quantum cache if we have more than 4 cpus. This 223 * avoids lock contention at the expense of some fragmentation. 224 */ 225 size = (long)nbuf * BKVASIZE; 226 kmi->buffer_sva = firstaddr; 227 kmi->buffer_eva = kmi->buffer_sva + size; 228 vmem_init(buffer_arena, "buffer arena", kmi->buffer_sva, size, 229 PAGE_SIZE, (mp_ncpus > 4) ? BKVASIZE * 8 : 0, M_WAITOK); 230 firstaddr += size; 231 232 /* 233 * And optionally transient bio space. 234 */ 235 if (bio_transient_maxcnt != 0) { 236 size = (long)bio_transient_maxcnt * maxphys; 237 vmem_init(transient_arena, "transient arena", 238 firstaddr, size, PAGE_SIZE, 0, M_WAITOK); 239 firstaddr += size; 240 } 241 if (firstaddr != kmi->clean_eva) 242 panic("Clean map calculation incorrect"); 243 244 /* 245 * Allocate the pageable submaps. We may cache an exec map entry per 246 * CPU, so we therefore need to reserve space for at least ncpu+1 247 * entries to avoid deadlock. The exec map is also used by some image 248 * activators, so we leave a fixed number of pages for their use. 249 */ 250 #ifdef __LP64__ 251 exec_map_entries = 8 * mp_ncpus; 252 #else 253 exec_map_entries = 2 * mp_ncpus + 4; 254 #endif 255 exec_map_entry_size = round_page(PATH_MAX + ARG_MAX); 256 kmem_subinit(exec_map, kernel_map, &minaddr, &maxaddr, 257 exec_map_entries * exec_map_entry_size + 64 * PAGE_SIZE, false); 258 kmem_subinit(pipe_map, kernel_map, &minaddr, &maxaddr, maxpipekva, 259 false); 260 } 261