1 /* $NetBSD: vmparam.h,v 1.26 2003/04/08 23:35:48 thorpej 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 * All systypes currently supported by NetBSD/alpha have an 8K pages. 54 * Override the PAGE_* definitions to be compile-time constants. 55 */ 56 #define PAGE_SHIFT 13 57 #define PAGE_SIZE (1 << PAGE_SHIFT) 58 #define PAGE_MASK (PAGE_SIZE - 1) 59 60 /* 61 * USRSTACK is the top (end) of the user stack. 62 * 63 * Digital UNIX (formerly DEC OSF/1) places the stack below the 64 * text segment (i.e. growing downward from 4G). We may want to 65 * consider doing that at some point, but it might require changes 66 * to the exec code. 67 */ 68 #define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */ 69 70 /* 71 * Virtual memory related constants, all in bytes 72 */ 73 #ifndef MAXTSIZ 74 #define MAXTSIZ (1<<30) /* max text size (1G) */ 75 #endif 76 #ifndef DFLDSIZ 77 #define DFLDSIZ (1<<27) /* initial data size (128M) */ 78 #endif 79 #ifndef MAXDSIZ 80 #define MAXDSIZ (1<<30) /* max data size (1G) */ 81 #endif 82 #ifndef DFLSSIZ 83 #define DFLSSIZ (1<<21) /* initial stack size (2M) */ 84 #endif 85 #ifndef MAXSSIZ 86 #define MAXSSIZ (1<<25) /* max stack size (32M) */ 87 #endif 88 89 /* 90 * PTEs for mapping user space into the kernel for phyio operations. 91 * 64 pte's are enough to cover 8 disks * MAXBSIZE. 92 */ 93 #ifndef USRIOSIZE 94 #define USRIOSIZE 64 95 #endif 96 97 /* 98 * PTEs for system V style shared memory. 99 * This is basically slop for kmempt which we actually allocate (malloc) from. 100 */ 101 #ifndef SHMMAXPGS 102 #define SHMMAXPGS 1024 /* 8mb */ 103 #endif 104 105 /* 106 * Mach derived constants 107 */ 108 109 /* user/kernel map constants */ 110 #define VM_MIN_ADDRESS ((vaddr_t)ALPHA_USEG_BASE) /* 0 */ 111 #define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */ 112 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 113 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE) 114 #define VM_MAX_KERNEL_ADDRESS trunc_page((vaddr_t)ALPHA_K1SEG_END) 115 116 /* virtual sizes (bytes) for various kernel submaps */ 117 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 118 119 /* some Alpha-specific constants */ 120 #define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */ 121 122 #define VM_PHYSSEG_MAX 16 /* XXX */ 123 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 124 #define VM_PHYSSEG_NOADD /* no more after vm_mem_init */ 125 126 #define VM_NFREELIST 1 127 #define VM_FREELIST_DEFAULT 0 128 129 /* 130 * pmap-specific data store in the vm_page structure. 131 */ 132 #define __HAVE_VM_PAGE_MD 133 struct vm_page_md { 134 struct pv_entry *pvh_list; /* pv_entry list */ 135 struct simplelock pvh_slock; /* lock on this head */ 136 int pvh_attrs; /* page attributes */ 137 }; 138 139 #define VM_MDPAGE_INIT(pg) \ 140 do { \ 141 (pg)->mdpage.pvh_list = NULL; \ 142 simple_lock_init(&(pg)->mdpage.pvh_slock); \ 143 } while (/*CONSTCOND*/0) 144 145 #endif /* ! _ALPHA_VMPARAM_H_ */ 146