1 /* $NetBSD: vmparam.h,v 1.24 2001/11/15 18:06:12 soren Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 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. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 41 * 42 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 43 */ 44 45 #ifndef _ALPHA_VMPARAM_H_ 46 #define _ALPHA_VMPARAM_H_ 47 48 /* 49 * Machine dependent constants for Alpha. 50 */ 51 52 /* 53 * USRTEXT is the start of the user text/data space, while USRSTACK 54 * is the top (end) of the user stack. 55 * 56 * Digital UNIX (formerly DEC OSF/1) places the stack below the 57 * text segment (i.e. growing downward from 4G). We may want to 58 * consider doing that at some point, but it might require changes 59 * to the exec code. 60 */ 61 #define USRTEXT NBPG 62 #define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */ 63 64 /* 65 * Virtual memory related constants, all in bytes 66 */ 67 #ifndef MAXTSIZ 68 #define MAXTSIZ (1<<30) /* max text size (1G) */ 69 #endif 70 #ifndef DFLDSIZ 71 #define DFLDSIZ (1<<27) /* initial data size (128M) */ 72 #endif 73 #ifndef MAXDSIZ 74 #define MAXDSIZ (1<<30) /* max data size (1G) */ 75 #endif 76 #ifndef DFLSSIZ 77 #define DFLSSIZ (1<<21) /* initial stack size (2M) */ 78 #endif 79 #ifndef MAXSSIZ 80 #define MAXSSIZ (1<<25) /* max stack size (32M) */ 81 #endif 82 83 /* 84 * PTEs for mapping user space into the kernel for phyio operations. 85 * 64 pte's are enough to cover 8 disks * MAXBSIZE. 86 */ 87 #ifndef USRIOSIZE 88 #define USRIOSIZE 64 89 #endif 90 91 /* 92 * PTEs for system V style shared memory. 93 * This is basically slop for kmempt which we actually allocate (malloc) from. 94 */ 95 #ifndef SHMMAXPGS 96 #define SHMMAXPGS 1024 /* 8mb */ 97 #endif 98 99 /* 100 * Mach derived constants 101 */ 102 103 /* user/kernel map constants */ 104 #define VM_MIN_ADDRESS ((vaddr_t)ALPHA_USEG_BASE) /* 0 */ 105 #define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */ 106 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 107 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE) 108 #define VM_MAX_KERNEL_ADDRESS trunc_page((vaddr_t)ALPHA_K1SEG_END) 109 110 /* virtual sizes (bytes) for various kernel submaps */ 111 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 112 113 /* some Alpha-specific constants */ 114 #define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */ 115 116 #define VM_PHYSSEG_MAX 16 /* XXX */ 117 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 118 #define VM_PHYSSEG_NOADD /* no more after vm_mem_init */ 119 120 #define VM_NFREELIST 1 121 #define VM_FREELIST_DEFAULT 0 122 123 /* 124 * pmap-specific data store in the vm_page structure. 125 */ 126 #define __HAVE_VM_PAGE_MD 127 struct vm_page_md { 128 struct pv_entry *pvh_list; /* pv_entry list */ 129 struct simplelock pvh_slock; /* lock on this head */ 130 int pvh_attrs; /* page attributes */ 131 }; 132 133 #define VM_MDPAGE_INIT(pg) \ 134 do { \ 135 (pg)->mdpage.pvh_list = NULL; \ 136 simple_lock_init(&(pg)->mdpage.pvh_slock); \ 137 } while (/*CONSTCOND*/0) 138 139 #endif /* ! _ALPHA_VMPARAM_H_ */ 140