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 #include <sys/param.h> 69 #include <sys/domainset.h> 70 #include <sys/kernel.h> 71 #include <sys/lock.h> 72 #include <sys/proc.h> 73 #include <sys/rwlock.h> 74 #include <sys/malloc.h> 75 #include <sys/sysctl.h> 76 #include <sys/systm.h> 77 #include <sys/selinfo.h> 78 #include <sys/smp.h> 79 #include <sys/pipe.h> 80 #include <sys/bio.h> 81 #include <sys/buf.h> 82 #include <sys/vmem.h> 83 #include <sys/vmmeter.h> 84 85 #include <vm/vm.h> 86 #include <vm/vm_param.h> 87 #include <vm/vm_kern.h> 88 #include <vm/vm_object.h> 89 #include <vm/vm_page.h> 90 #include <vm/vm_phys.h> 91 #include <vm/vm_pagequeue.h> 92 #include <vm/vm_map.h> 93 #include <vm/vm_pager.h> 94 #include <vm/vm_extern.h> 95 96 extern void uma_startup1(vm_offset_t); 97 98 long physmem; 99 100 /* 101 * System initialization 102 */ 103 static void vm_mem_init(void *); 104 SYSINIT(vm_mem, SI_SUB_VM, SI_ORDER_FIRST, vm_mem_init, NULL); 105 106 /* 107 * vm_init initializes the virtual memory system. 108 * This is done only by the first cpu up. 109 */ 110 static void 111 vm_mem_init(void *dummy) 112 { 113 114 /* 115 * Initialize static domainsets, used by various allocators. 116 */ 117 domainset_init(); 118 119 /* 120 * Initialize resident memory structures. From here on, all physical 121 * memory is accounted for, and we use only virtual addresses. 122 */ 123 vm_set_page_size(); 124 virtual_avail = vm_page_startup(virtual_avail); 125 126 /* 127 * Set an initial domain policy for thread0 so that allocations 128 * can work. 129 */ 130 domainset_zero(); 131 132 /* Bootstrap the kernel memory allocator. */ 133 uma_startup1(virtual_avail); 134 135 /* 136 * Initialize other VM packages 137 */ 138 vmem_startup(); 139 vm_object_init(); 140 vm_map_startup(); 141 kmem_init(virtual_avail, virtual_end); 142 143 kmem_init_zero_region(); 144 pmap_init(); 145 vm_pager_init(); 146 } 147 148 void 149 vm_ksubmap_init(struct kva_md_info *kmi) 150 { 151 caddr_t firstaddr, v; 152 vm_size_t size = 0; 153 long physmem_est; 154 vm_offset_t minaddr; 155 vm_offset_t maxaddr; 156 157 TSENTER(); 158 /* 159 * Allocate space for system data structures. 160 * The first available kernel virtual address is in "v". 161 * As pages of kernel virtual memory are allocated, "v" is incremented. 162 * As pages of memory are allocated and cleared, 163 * "firstaddr" is incremented. 164 */ 165 166 /* 167 * Make two passes. The first pass calculates how much memory is 168 * needed and allocates it. The second pass assigns virtual 169 * addresses to the various data structures. 170 */ 171 firstaddr = NULL; 172 again: 173 v = firstaddr; 174 175 /* 176 * Discount the physical memory larger than the size of kernel_map 177 * to avoid eating up all of KVA space. 178 */ 179 physmem_est = lmin(physmem, btoc(vm_map_max(kernel_map) - 180 vm_map_min(kernel_map))); 181 182 v = kern_vfs_bio_buffer_alloc(v, physmem_est); 183 184 /* 185 * End of first pass, size has been calculated so allocate memory 186 */ 187 if (firstaddr == NULL) { 188 size = (vm_size_t)v; 189 #ifdef VM_FREELIST_DMA32 190 /* 191 * Try to protect 32-bit DMAable memory from the largest 192 * early alloc of wired mem. 193 */ 194 firstaddr = kmem_alloc_attr(size, M_ZERO | M_NOWAIT, 195 (vm_paddr_t)1 << 32, ~(vm_paddr_t)0, VM_MEMATTR_DEFAULT); 196 if (firstaddr == NULL) 197 #endif 198 firstaddr = kmem_malloc(size, M_ZERO | M_WAITOK); 199 if (firstaddr == NULL) 200 panic("startup: no room for tables"); 201 goto again; 202 } 203 204 /* 205 * End of second pass, addresses have been assigned 206 */ 207 if ((vm_size_t)(v - firstaddr) != size) 208 panic("startup: table size inconsistency"); 209 210 /* 211 * Allocate the clean map to hold all of I/O virtual memory. 212 */ 213 size = (long)nbuf * BKVASIZE + (long)bio_transient_maxcnt * maxphys; 214 kmi->clean_sva = kva_alloc(size); 215 kmi->clean_eva = kmi->clean_sva + size; 216 217 /* 218 * Allocate the buffer arena. 219 * 220 * Enable the quantum cache if we have more than 4 cpus. This 221 * avoids lock contention at the expense of some fragmentation. 222 */ 223 size = (long)nbuf * BKVASIZE; 224 kmi->buffer_sva = kmi->clean_sva; 225 kmi->buffer_eva = kmi->buffer_sva + size; 226 vmem_init(buffer_arena, "buffer arena", kmi->buffer_sva, size, 227 PAGE_SIZE, (mp_ncpus > 4) ? BKVASIZE * 8 : 0, M_WAITOK); 228 229 /* 230 * And optionally transient bio space. 231 */ 232 if (bio_transient_maxcnt != 0) { 233 size = (long)bio_transient_maxcnt * maxphys; 234 vmem_init(transient_arena, "transient arena", 235 kmi->buffer_eva, size, PAGE_SIZE, 0, M_WAITOK); 236 } 237 238 /* 239 * Allocate the pageable submaps. We may cache an exec map entry per 240 * CPU, so we therefore need to reserve space for at least ncpu+1 241 * entries to avoid deadlock. The exec map is also used by some image 242 * activators, so we leave a fixed number of pages for their use. 243 */ 244 #ifdef __LP64__ 245 exec_map_entries = 8 * mp_ncpus; 246 #else 247 exec_map_entries = 2 * mp_ncpus + 4; 248 #endif 249 exec_map_entry_size = round_page(PATH_MAX + ARG_MAX); 250 kmem_subinit(exec_map, kernel_map, &minaddr, &maxaddr, 251 exec_map_entries * exec_map_entry_size + 64 * PAGE_SIZE, false); 252 kmem_subinit(pipe_map, kernel_map, &minaddr, &maxaddr, maxpipekva, 253 false); 254 TSEXIT(); 255 } 256