vmparam.h revision 1.34
1/* $NetBSD: vmparam.h,v 1.34 2003/04/09 16:27:06 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)vmparam.h 8.1 (Berkeley) 6/11/93 45 */ 46 47#ifndef _SPARC_VMPARAM_H_ 48#define _SPARC_VMPARAM_H_ 49 50/* 51 * Machine dependent constants for SPARC 52 */ 53 54#include <machine/cpuconf.h> 55 56/* 57 * Sun4 systems have a 8K page size. All other platforms have a 58 * 4K page size. We need to define these upper and lower limits 59 * for machine-independent code. We also try to make PAGE_SIZE, 60 * PAGE_SHIFT, and PAGE_MASK into compile-time constants, if we can. 61 * 62 * XXX Should garbage-collect the version of this from <machine/param.h>. 63 */ 64#define PAGE_SHIFT_SUN4 13 65#define PAGE_SHIFT_SUN4CM 12 66 67#define MIN_PAGE_SIZE (1 << PAGE_SHIFT_SUN4CM) 68#define MAX_PAGE_SIZE (1 << PAGE_SHIFT_SUN4) 69 70#if CPU_NTYPES != 0 && !defined(SUN4) 71#define PAGE_SHIFT PAGE_SHIFT_SUN4CM 72#define PAGE_SIZE (1 << PAGE_SHIFT) 73#define PAGE_MASK (PAGE_SIZE - 1) 74#elif CPU_NTYPES == 1 && defined(SUN4) 75#define PAGE_SHIFT PAGE_SHIFT_SUN4 76#define PAGE_SIZE (1 << PAGE_SHIFT) 77#define PAGE_MASK (PAGE_SIZE - 1) 78#endif 79 80/* 81 * USRSTACK is the top (end) of the user stack. 82 */ 83#define USRSTACK KERNBASE /* Start of user stack */ 84 85/* 86 * Virtual memory related constants, all in bytes 87 */ 88#ifndef MAXTSIZ 89#define MAXTSIZ (64*1024*1024) /* max text size */ 90#endif 91#ifndef DFLDSIZ 92#define DFLDSIZ (64*1024*1024) /* initial data size limit */ 93#endif 94#ifndef MAXDSIZ 95#define MAXDSIZ (256*1024*1024) /* max data size */ 96#endif 97#ifndef DFLSSIZ 98#define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 99#endif 100#ifndef MAXSSIZ 101#define MAXSSIZ MAXDSIZ /* max stack size */ 102#endif 103 104/* 105 * Size of shared memory map 106 */ 107#ifndef SHMMAXPGS 108#define SHMMAXPGS 1024 109#endif 110 111/* 112 * Mach derived constants 113 */ 114 115/* 116 * User/kernel map constants. Note that sparc/vaddrs.h defines the 117 * IO space virtual base, which must be the same as VM_MAX_KERNEL_ADDRESS: 118 * tread with care. 119 */ 120#define VM_MIN_ADDRESS ((vaddr_t)0) 121#define VM_MAX_ADDRESS ((vaddr_t)KERNBASE) 122#define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE) 123#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 124#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND) 125 126#define VM_PHYSSEG_MAX 32 /* up to 32 segments */ 127#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 128#define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */ 129 130#define VM_NFREELIST 1 131#define VM_FREELIST_DEFAULT 0 132 133#define __HAVE_VM_PAGE_MD 134 135/* 136 * For each managed physical page, there is a list of all currently 137 * valid virtual mappings of that page. Since there is usually one 138 * (or zero) mapping per page, the table begins with an initial entry, 139 * rather than a pointer; this head entry is empty iff its pv_pmap 140 * field is NULL. 141 */ 142struct vm_page_md { 143 struct pvlist { 144 struct pvlist *pv_next; /* next pvlist, if any */ 145 struct pmap *pv_pmap; /* pmap of this va */ 146 vaddr_t pv_va; /* virtual address */ 147 int pv_flags; /* flags (below) */ 148 } pvlisthead; 149 struct simplelock pv_slock; 150}; 151#define VM_MDPAGE_PVHEAD(pg) (&(pg)->mdpage.pvlisthead) 152 153#define VM_MDPAGE_INIT(pg) do { \ 154 (pg)->mdpage.pvlisthead.pv_next = NULL; \ 155 (pg)->mdpage.pvlisthead.pv_pmap = NULL; \ 156 (pg)->mdpage.pvlisthead.pv_va = 0; \ 157 (pg)->mdpage.pvlisthead.pv_flags = 0; \ 158 simple_lock_init(&(pg)->mdpage.pv_slock); \ 159} while(/*CONSTCOND*/0) 160 161#endif /* _SPARC_VMPARAM_H_ */ 162