1 /* $NetBSD: vmparam.h,v 1.8 2003/04/02 07:36:00 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 _MACHINE_VMPARAM_H_ 46 #define _MACHINE_VMPARAM_H_ 47 48 /* 49 * We use 4K pages on the hp300. Override the PAGE_* definitions 50 * to be compile-time constants. 51 */ 52 #define PAGE_SHIFT 12 53 #define PAGE_SIZE (1 << PAGE_SHIFT) 54 #define PAGE_MASK (PAGE_SIZE - 1) 55 56 /* 57 * USRSTACK is the top (end) of the user stack. 58 */ 59 #define USRSTACK VM_MAXUSER_ADDRESS 60 61 /* 62 * Virtual memory related constants, all in bytes 63 */ 64 #ifndef MAXTSIZ 65 #define MAXTSIZ (8*1024*1024) /* max text size */ 66 #endif 67 #ifndef DFLDSIZ 68 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 69 #endif 70 #ifndef MAXDSIZ 71 #define MAXDSIZ (64*1024*1024) /* max data size */ 72 #endif 73 #ifndef DFLSSIZ 74 #define DFLSSIZ (512*1024) /* initial stack size limit */ 75 #endif 76 #ifndef MAXSSIZ 77 #define MAXSSIZ MAXDSIZ /* max stack size */ 78 #endif 79 80 /* 81 * Sizes of the system and user portions of the system page table. 82 */ 83 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 84 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 85 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 86 87 /* 88 * PTEs for mapping user space into the kernel for phyio operations. 89 * One page is enough to handle 4Mb of simultaneous raw IO operations. 90 */ 91 #ifndef USRIOSIZE 92 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 93 #endif 94 95 /* 96 * PTEs for system V style shared memory. 97 * This is basically slop for kmempt which we actually allocate (malloc) from. 98 */ 99 #ifndef SHMMAXPGS 100 #define SHMMAXPGS 1024 /* 8mb */ 101 #endif 102 103 /* 104 * Mach derived constants 105 */ 106 107 /* user/kernel map constants */ 108 #define VM_MIN_ADDRESS ((vaddr_t)0) 109 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFFC0000) 110 #define VM_MAX_ADDRESS ((vaddr_t)0xFFFC0000) 111 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 112 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE)) 113 114 /* virtual sizes (bytes) for various kernel submaps */ 115 #define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES) 116 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 117 118 /* # of kernel PT pages (initial only, can grow dynamically) */ 119 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 120 121 /* 122 * Constants which control the way the VM system deals with memory segments. 123 * Only one physical contigous memory segment. 124 */ 125 #define VM_PHYSSEG_MAX 1 126 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 127 #define VM_PHYSSEG_NOADD 128 129 #define VM_NFREELIST 1 130 #define VM_FREELIST_DEFAULT 0 131 132 #define __HAVE_PMAP_PHYSSEG 133 134 /* 135 * pmap-specific data stored in the vm_physmem[] array. 136 */ 137 struct pmap_physseg { 138 struct pv_entry *pvent; /* pv table for this seg */ 139 char *attrs; /* page attributes for this seg */ 140 }; 141 142 #endif /* _MACHINE_VMPARAM_H_ */ 143