1 /* $NetBSD: vmparam.h,v 1.32 2003/04/02 07:35:55 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 6 * 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. 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 7.3 (Berkeley) 5/7/91 43 */ 44 #ifndef _MACHINE_VMPARAM_H_ 45 #define _MACHINE_VMPARAM_H_ 46 47 #include <machine/pte.h> 48 49 /* 50 * Machine dependent constants for HP300 51 */ 52 53 /* 54 * We use 8K pages on the Amiga. Override the PAGE_* definitions 55 * to be compie-time constants. 56 */ 57 #define PAGE_SHIFT 13 58 #define PAGE_SIZE (1 << PAGE_SHIFT) 59 #define PAGE_MASK (PAGE_SIZE - 1) 60 61 /* 62 * USRSTACK is the top (end) of the user stack. 63 * 64 * These are a mixture of i386, sun3 and hp settings.. 65 */ 66 67 /* Sun settings. Still hope, that I might get sun3 binaries to work... */ 68 #ifndef USRSTACK 69 #define USRSTACK 0x0E000000 70 #endif 71 #define KUSER_AREA (-UPAGES*PAGE_SIZE) 72 /* 73 * Virtual memory related constants, all in bytes 74 */ 75 76 #ifndef MAXTSIZ 77 #define MAXTSIZ (6*1024*1024) /* max text size */ 78 #endif 79 #ifndef DFLDSIZ 80 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 81 #endif 82 #ifndef MAXDSIZ 83 #define MAXDSIZ (128*1024*1024) /* max data size */ 84 #endif 85 #ifndef DFLSSIZ 86 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 87 #endif 88 #ifndef MAXSSIZ 89 #define MAXSSIZ (32*1024*1024) /* max stack size */ 90 #endif 91 92 /* 93 * Sizes of the system and user portions of the system page table. 94 */ 95 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 96 #define SYSPTSIZE (2 * NPTEPG) /* 16mb */ 97 #define USRPTSIZE (1 * NPTEPG) /* 16mb */ 98 99 /* 100 * PTEs for mapping user space into the kernel for phyio operations. 101 * One page is enough to handle 16Mb of simultaneous raw IO operations. 102 */ 103 #ifndef USRIOSIZE 104 #define USRIOSIZE (1 * NPTEPG) /* 16mb */ 105 #endif 106 107 /* 108 * PTEs for system V style shared memory. 109 * This is basically slop for kmempt which we actually allocate (malloc) from. 110 */ 111 #ifndef SHMMAXPGS 112 #define SHMMAXPGS (1 * NPTEPG) /* 16mb */ 113 #endif 114 115 /* 116 * user/kernel map constants 117 */ 118 #define VM_MIN_ADDRESS ((vaddr_t)0) /* user min */ 119 #define VM_MAX_ADDRESS ((vaddr_t)(USRSTACK)) /* user max */ 120 #define VM_MAXUSER_ADDRESS ((vaddr_t)(VM_MAX_ADDRESS)) /* same */ 121 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 122 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE)) 123 124 /* 125 * virtual sizes (bytes) for various kernel submaps 126 */ 127 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 128 129 /* 130 * Our bootloader currently passes up to 16 segments (but this is variable) 131 * Normally, the biggest of them is used for the kernel, and the kernel 132 * segment is given to VM first. 133 */ 134 #define VM_PHYSSEG_MAX (16) 135 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 136 #define VM_PHYSSEG_NOADD /* XXX this should be done right later */ 137 138 /* 139 * Allow supporting Zorro-II memory as lower priority: 140 * 141 * - DEFAULT for Zorro-III memory (presumably 32 bit) 142 * - ZORROII for Zorro-II memory (16 bit, Zorro-II DMA) 143 */ 144 145 #define VM_NFREELIST 2 146 #define VM_FREELIST_DEFAULT 0 147 #define VM_FREELIST_ZORROII 1 148 149 #define __HAVE_PMAP_PHYSSEG 150 151 /* 152 * pmap-specific data stored in the vm_physmem[] array. 153 */ 154 struct pmap_physseg { 155 struct pv_entry *pvent; /* pv table for this seg */ 156 char *attrs; /* page attributes for this seg */ 157 }; 158 159 /* 160 * number of kernel PT pages (initial only, can grow dynamically) 161 */ 162 #define VM_KERNEL_PT_PAGES ((vm_size_t)8) /* XXX: SYSPTSIZE */ 163 #endif /* !_MACHINE_VMPARAM_H_ */ 164