1 /* $NetBSD: vmparam.h,v 1.45 2009/03/06 20:31:53 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Slightly modified for the VAX port /IC 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 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 34 * SUCH DAMAGE. 35 * 36 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91 37 */ 38 #ifndef _VMPARAM_H_ 39 #define _VMPARAM_H_ 40 41 /* 42 * Machine dependent constants for VAX. 43 */ 44 45 /* 46 * We use 4K VM pages on the VAX. Override the PAGE_* definitions 47 * to be compile-time constants. 48 */ 49 #define PAGE_SHIFT 12 50 #define PAGE_SIZE (1 << PAGE_SHIFT) 51 #define PAGE_MASK (PAGE_SIZE - 1) 52 53 /* 54 * USRSTACK is the top (end) of the user stack. Immediately above the 55 * user stack resides kernel. 56 */ 57 58 #define USRSTACK KERNBASE 59 60 /* 61 * Virtual memory related constants, all in bytes 62 */ 63 64 #ifndef MAXTSIZ 65 #define MAXTSIZ (8*1024*1024) /* max text size */ 66 #endif 67 #ifndef DFLDSIZ 68 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 69 #endif 70 #ifndef MAXDSIZ 71 #define MAXDSIZ (1024*1024*1024) /* max data size */ 72 #endif 73 #ifndef DFLSSIZ 74 #define DFLSSIZ (512*1024) /* initial stack size limit */ 75 #endif 76 #ifndef MAXSSIZ 77 #define MAXSSIZ (8*1024*1024) /* max stack size */ 78 #endif 79 80 #define VM_PHYSSEG_MAX 1 81 #define VM_PHYSSEG_NOADD 82 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH /* XXX */ 83 84 #define VM_NFREELIST 1 85 #define VM_FREELIST_DEFAULT 0 86 87 /* MD round macros */ 88 #define vax_round_page(x) (((vaddr_t)(x) + VAX_PGOFSET) & ~VAX_PGOFSET) 89 #define vax_trunc_page(x) ((vaddr_t)(x) & ~VAX_PGOFSET) 90 91 /* 92 * Mach derived constants 93 */ 94 95 /* user/kernel map constants */ 96 #define VM_MIN_ADDRESS ((vaddr_t)0) 97 #define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE) 98 #define VM_MAX_ADDRESS ((vaddr_t)KERNBASE) 99 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 100 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0xC0000000)) 101 102 /* 103 * The address to which unspecified mapping requests default 104 */ 105 #define __USE_TOPDOWN_VM 106 #define VM_DEFAULT_ADDRESS(da, sz) \ 107 trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz)) 108 109 #define USRIOSIZE (8 * VAX_NPTEPG) /* 512MB */ 110 #define VM_PHYS_SIZE (USRIOSIZE*VAX_NBPG) 111 112 #if 0 113 #define __HAVE_VM_PAGE_MD 114 115 struct vm_page_md { 116 unsigned int md_attrs; 117 }; 118 119 #define VM_MDPAGE_INIT(pg) ((pg)->mdpage.md_attrs = 0) 120 #endif 121 122 123 #endif 124