1 /* $NetBSD: vmparam.h,v 1.25 2003/04/02 07:53:59 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990, 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. 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) 4/19/94 43 */ 44 45 #ifndef _X68K_VMPARAM_H_ 46 #define _X68K_VMPARAM_H_ 47 48 /* 49 * Machine dependent constants for X68K 50 */ 51 52 /* 53 * We use 4K pages on the X68K. Override the PAGE_* definitions 54 * to be compile-time constants. 55 */ 56 #define PAGE_SHIFT 12 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 #define USRSTACK VM_MAXUSER_ADDRESS /* Start of user stack */ 64 65 /* 66 * Virtual memory related constants, all in bytes 67 */ 68 #ifndef MAXTSIZ 69 #define MAXTSIZ (8*1024*1024) /* max text size */ 70 #endif 71 #ifndef DFLDSIZ 72 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 73 #endif 74 #ifndef MAXDSIZ 75 #define MAXDSIZ (64*1024*1024) /* max data size */ 76 #endif 77 #ifndef DFLSSIZ 78 #define DFLSSIZ (512*1024) /* initial stack size limit */ 79 #endif 80 #ifndef MAXSSIZ 81 #define MAXSSIZ MAXDSIZ /* max stack size */ 82 #endif 83 84 /* 85 * Sizes of the system and user portions of the system page table. 86 */ 87 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 88 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 89 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 90 91 /* 92 * PTEs for mapping user space into the kernel for phyio operations. 93 * One page is enough to handle 4Mb of simultaneous raw IO operations. 94 */ 95 #ifndef USRIOSIZE 96 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 97 #endif 98 99 /* 100 * PTEs for system V style shared memory. 101 * This is basically slop for kmempt which we actually allocate (malloc) from. 102 */ 103 #ifndef SHMMAXPGS 104 #define SHMMAXPGS 1024 /* 4mb */ 105 #endif 106 107 /* 108 * Mach derived constants 109 */ 110 111 /* user/kernel map constants */ 112 #define VM_MIN_ADDRESS ((vaddr_t)0) 113 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFFFD000) 114 #define VM_MAX_ADDRESS ((vaddr_t)0xFFFFD000) 115 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 116 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000) 117 118 /* virtual sizes (bytes) for various kernel submaps */ 119 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 120 121 /* # of kernel PT pages (initial only, can grow dynamically) */ 122 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 123 124 /* 125 * Constants which control the way the VM system deals with memory segments. 126 */ 127 #define VM_PHYSSEG_MAX 3 128 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 129 /* Actually VM_PSTRAT_UPPERFIRST is needed */ 130 #define VM_PHYSSEG_NOADD 131 132 #define VM_NFREELIST 1 133 #define VM_FREELIST_DEFAULT 0 134 135 #define __HAVE_PMAP_PHYSSEG 136 137 /* 138 * pmap-specific data stored in the vm_physmem[] array. 139 */ 140 struct pmap_physseg { 141 struct pv_entry *pvent; /* pv table for this seg */ 142 char *attrs; /* page attributes for this seg */ 143 }; 144 145 #endif /* _X68K_VMPARAM_H_ */ 146