1 /* $NetBSD: vmparam.h,v 1.30 2001/11/15 18:06:12 soren 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 * USRTEXT is the start of the user text/data space, while USRSTACK 63 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 64 * the number of pages from the beginning of the P0 region to the 65 * beginning of the text and from the beginning of the P1 region to the 66 * beginning of the stack respectively. 67 * 68 * These are a mixture of i386, sun3 and hp settings.. 69 */ 70 71 /* Sun settings. Still hope, that I might get sun3 binaries to work... */ 72 #define USRTEXT 0x2000 73 #ifndef USRSTACK 74 #define USRSTACK 0x0E000000 75 #endif 76 #define LOWPAGES btoc(USRTEXT) 77 #define KUSER_AREA (-UPAGES*NBPG) 78 /* 79 * Virtual memory related constants, all in bytes 80 */ 81 82 #ifndef MAXTSIZ 83 #define MAXTSIZ (6*1024*1024) /* max text size */ 84 #endif 85 #ifndef DFLDSIZ 86 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 87 #endif 88 #ifndef MAXDSIZ 89 #define MAXDSIZ (128*1024*1024) /* max data size */ 90 #endif 91 #ifndef DFLSSIZ 92 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 93 #endif 94 #ifndef MAXSSIZ 95 #define MAXSSIZ (32*1024*1024) /* max stack size */ 96 #endif 97 98 /* 99 * Sizes of the system and user portions of the system page table. 100 */ 101 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 102 #define SYSPTSIZE (2 * NPTEPG) /* 16mb */ 103 #define USRPTSIZE (1 * NPTEPG) /* 16mb */ 104 105 /* 106 * PTEs for mapping user space into the kernel for phyio operations. 107 * One page is enough to handle 16Mb of simultaneous raw IO operations. 108 */ 109 #ifndef USRIOSIZE 110 #define USRIOSIZE (1 * NPTEPG) /* 16mb */ 111 #endif 112 113 /* 114 * PTEs for system V style shared memory. 115 * This is basically slop for kmempt which we actually allocate (malloc) from. 116 */ 117 #ifndef SHMMAXPGS 118 #define SHMMAXPGS (1 * NPTEPG) /* 16mb */ 119 #endif 120 121 /* 122 * user/kernel map constants 123 */ 124 #define VM_MIN_ADDRESS ((vaddr_t)0) /* user min */ 125 #define VM_MAX_ADDRESS ((vaddr_t)(USRSTACK)) /* user max */ 126 #define VM_MAXUSER_ADDRESS ((vaddr_t)(VM_MAX_ADDRESS)) /* same */ 127 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 128 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG)) 129 130 /* 131 * virtual sizes (bytes) for various kernel submaps 132 */ 133 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 134 135 /* 136 * Our bootloader currently passes up to 16 segments (but this is variable) 137 * Normally, the biggest of them is used for the kernel, and the kernel 138 * segment is given to VM first. 139 */ 140 #define VM_PHYSSEG_MAX (16) 141 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 142 #define VM_PHYSSEG_NOADD /* XXX this should be done right later */ 143 144 /* 145 * Allow supporting Zorro-II memory as lower priority: 146 * 147 * - DEFAULT for Zorro-III memory (presumably 32 bit) 148 * - ZORROII for Zorro-II memory (16 bit, Zorro-II DMA) 149 */ 150 151 #define VM_NFREELIST 2 152 #define VM_FREELIST_DEFAULT 0 153 #define VM_FREELIST_ZORROII 1 154 155 #define __HAVE_PMAP_PHYSSEG 156 157 /* 158 * pmap-specific data stored in the vm_physmem[] array. 159 */ 160 struct pmap_physseg { 161 struct pv_entry *pvent; /* pv table for this seg */ 162 char *attrs; /* page attributes for this seg */ 163 }; 164 165 /* 166 * number of kernel PT pages (initial only, can grow dynamically) 167 */ 168 #define VM_KERNEL_PT_PAGES ((vm_size_t)8) /* XXX: SYSPTSIZE */ 169 #endif /* !_MACHINE_VMPARAM_H_ */ 170