1 /* $NetBSD: vmparam.h,v 1.21 2000/02/11 19:25:15 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 _HP300_VMPARAM_H_ 46 #define _HP300_VMPARAM_H_ 47 48 /* 49 * Machine dependent constants for HP300 50 */ 51 52 /* 53 * USRTEXT is the start of the user text/data space, while USRSTACK 54 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 55 * the number of pages from the beginning of the P0 region to the 56 * beginning of the text and from the beginning of the P1 region to the 57 * beginning of the stack respectively. 58 * 59 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 60 * is for HPUX compatibility. Why?? Because HPUX's debuggers 61 * have the user's stack hard-wired at FFF00000 for post-mortems, 62 * and we must be compatible... 63 */ 64 #define USRTEXT 8192 /* Must equal __LDPGSZ */ 65 #define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */ 66 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 67 #define P1PAGES 0x100000 68 #define LOWPAGES 0 69 #define HIGHPAGES (0x100000/NBPG) 70 71 /* 72 * Virtual memory related constants, all in bytes 73 */ 74 #ifndef MAXTSIZ 75 #define MAXTSIZ (8*1024*1024) /* max text size */ 76 #endif 77 #ifndef DFLDSIZ 78 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 79 #endif 80 #ifndef MAXDSIZ 81 #define MAXDSIZ (64*1024*1024) /* max data size */ 82 #endif 83 #ifndef DFLSSIZ 84 #define DFLSSIZ (512*1024) /* initial stack size limit */ 85 #endif 86 #ifndef MAXSSIZ 87 #define MAXSSIZ MAXDSIZ /* max stack size */ 88 #endif 89 90 /* 91 * Sizes of the system and user portions of the system page table. 92 */ 93 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 94 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 95 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 96 97 /* 98 * PTEs for mapping user space into the kernel for phyio operations. 99 * One page is enough to handle 4Mb of simultaneous raw IO operations. 100 */ 101 #ifndef USRIOSIZE 102 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 103 #endif 104 105 /* 106 * PTEs for system V style shared memory. 107 * This is basically slop for kmempt which we actually allocate (malloc) from. 108 */ 109 #ifndef SHMMAXPGS 110 #define SHMMAXPGS 1024 /* 4mb */ 111 #endif 112 113 /* 114 * External IO space map size. 115 * By default we make it large enough to map up to 3 DIO-II devices and 116 * the complete DIO space. For a 320-only configuration (which has no 117 * DIO-II) you could define a considerably smaller region. 118 */ 119 #ifndef EIOMAPSIZE 120 #define EIOMAPSIZE 3584 /* 14mb */ 121 #endif 122 123 /* 124 * The time for a process to be blocked before being very swappable. 125 * This is a number of seconds which the system takes as being a non-trivial 126 * amount of real time. You probably shouldn't change this; 127 * it is used in subtle ways (fractions and multiples of it are, that is, like 128 * half of a ``long time'', almost a long time, etc.) 129 * It is related to human patience and other factors which don't really 130 * change over time. 131 */ 132 #define MAXSLP 20 133 134 /* 135 * Mach derived constants 136 */ 137 138 /* user/kernel map constants */ 139 #define VM_MIN_ADDRESS ((vaddr_t)0) 140 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 141 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 142 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 143 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000) 144 145 /* virtual sizes (bytes) for various kernel submaps */ 146 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 147 148 /* # of kernel PT pages (initial only, can grow dynamically) */ 149 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 150 151 /* pcb base */ 152 #define pcbb(p) ((u_int)(p)->p_addr) 153 154 /* 155 * Constants which control the way the VM system deals with memory segments. 156 * The hp300 only has one physical memory segment. 157 */ 158 #define VM_PHYSSEG_MAX 1 159 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 160 #define VM_PHYSSEG_NOADD 161 162 #define VM_NFREELIST 1 163 #define VM_FREELIST_DEFAULT 0 164 165 /* 166 * pmap-specific data stored in the vm_physmem[] array. 167 */ 168 struct pmap_physseg { 169 struct pv_entry *pvent; /* pv table for this seg */ 170 char *attrs; /* page attributes for this seg */ 171 }; 172 173 #endif /* _HP300_VMPARAM_H_ */ 174