2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * The Mach Operating System project at Carnegie-Mellon University.
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9 * modification, are permitted provided that the following conditions
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17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
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21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * from: @(#)vm_init.c 8.1 (Berkeley) 6/11/93
39 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
40 * All rights reserved.
42 * Authors: Avadis Tevanian, Jr., Michael Wayne Young
44 * Permission to use, copy, modify and distribute this software and
45 * its documentation is hereby granted, provided that both the copyright
46 * notice and this permission notice appear in all copies of the
47 * software, derivative works or modified versions, and any portions
48 * thereof, and that both notices appear in supporting documentation.
50 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
51 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
52 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
54 * Carnegie Mellon requests users of this software to return to
56 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
57 * School of Computer Science
58 * Carnegie Mellon University
59 * Pittsburgh PA 15213-3890
61 * any improvements or extensions that they make and grant Carnegie the
62 * rights to redistribute these changes.
68 * Initialize the Virtual Memory subsystem.
71 #include <sys/param.h>
72 #include <sys/kernel.h>
74 #include <sys/mutex.h>
76 #include <sys/systm.h>
81 #include <vm/vm_param.h>
82 #include <vm/vm_kern.h>
83 #include <vm/vm_object.h>
84 #include <vm/vm_page.h>
85 #include <vm/vm_map.h>
86 #include <vm/vm_pager.h>
87 #include <vm/vm_extern.h>
88 #include <vm/vm_zone.h>
91 * System initialization
94 static void vm_mem_init __P((void *));
95 SYSINIT(vm_mem, SI_SUB_VM, SI_ORDER_FIRST, vm_mem_init, NULL)
98 * vm_init initializes the virtual memory system.
99 * This is done only by the first cpu up.
101 * The start and end address of physical memory is passed in.
110 * Initializes resident memory structures. From here on, all physical
111 * memory is accounted for, and we use only virtual addresses.
114 virtual_avail = vm_page_startup(avail_start, avail_end, virtual_avail);
117 * Initialize other VM packages
122 kmem_init(virtual_avail, virtual_end);
123 pmap_init(avail_start, avail_end);
128 vm_ksubmap_init(struct kva_md_info *kmi)
130 vm_offset_t firstaddr;
138 * Allocate space for system data structures.
139 * The first available kernel virtual address is in "v".
140 * As pages of kernel virtual memory are allocated, "v" is incremented.
141 * As pages of memory are allocated and cleared,
142 * "firstaddr" is incremented.
143 * An index into the kernel page table corresponding to the
144 * virtual memory address maintained in "v" is kept in "mapaddr".
148 * Make two passes. The first pass calculates how much memory is
149 * needed and allocates it. The second pass assigns virtual
150 * addresses to the various data structures.
154 v = (caddr_t)firstaddr;
156 v = kern_timeout_callwheel_alloc(v);
159 * Discount the physical memory larger than the size of kernel_map
160 * to avoid eating up all of KVA space.
162 if (kernel_map->first_free == NULL) {
163 printf("Warning: no free entries in kernel_map.\n");
164 physmem_est = physmem;
166 physmem_est = min(physmem, btoc(kernel_map->max_offset -
167 kernel_map->min_offset));
170 v = kern_vfs_bio_buffer_alloc(v, physmem_est);
173 * End of first pass, size has been calculated so allocate memory
175 if (firstaddr == 0) {
176 size = (vm_size_t)((char *)v - firstaddr);
177 firstaddr = kmem_alloc(kernel_map, round_page(size));
179 panic("startup: no room for tables");
184 * End of second pass, addresses have been assigned
186 if ((vm_size_t)((char *)v - firstaddr) != size)
187 panic("startup: table size inconsistency");
189 clean_map = kmem_suballoc(kernel_map, &kmi->clean_sva, &kmi->clean_eva,
190 (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size);
191 buffer_map = kmem_suballoc(clean_map, &kmi->buffer_sva,
192 &kmi->buffer_eva, (nbuf*BKVASIZE));
193 buffer_map->system_map = 1;
194 pager_map = kmem_suballoc(clean_map, &kmi->pager_sva, &kmi->pager_eva,
195 (nswbuf*MAXPHYS) + pager_map_size);
196 pager_map->system_map = 1;
197 exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr,
198 (16*(ARG_MAX+(PAGE_SIZE*3))));
201 * XXX: Mbuf system machine-specific initializations should
202 * go here, if anywhere.
206 * Initialize the callouts we just allocated.
208 kern_timeout_callwheel_init();