1 /* $NetBSD: vmparam.h,v 1.4 2002/02/26 15:13:21 simonb 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 * Machine dependent constants for cesfic 50 */ 51 52 /* 53 * We use 4K pages on the cesfic. 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 * USRTEXT is the start of the user text/data space, while USRSTACK 62 * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are 63 * the number of pages from the beginning of the P0 region to the 64 * beginning of the text and from the beginning of the P1 region to the 65 * beginning of the stack respectively. 66 * 67 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 68 * is for HPUX compatibility. Why?? Because HPUX's debuggers 69 * have the user's stack hard-wired at FFF00000 for post-mortems, 70 * and we must be compatible... 71 */ 72 #define USRTEXT 8192 /* Must equal __LDPGSZ */ 73 #define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */ 74 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 75 #define P1PAGES 0x100000 76 #define LOWPAGES 0 77 #define HIGHPAGES (0x100000/NBPG) 78 79 /* 80 * Virtual memory related constants, all in bytes 81 */ 82 #ifndef MAXTSIZ 83 #define MAXTSIZ (8*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 (64*1024*1024) /* max data size */ 90 #endif 91 #ifndef DFLSSIZ 92 #define DFLSSIZ (512*1024) /* initial stack size limit */ 93 #endif 94 #ifndef MAXSSIZ 95 #define MAXSSIZ MAXDSIZ /* max stack size */ 96 #endif 97 98 /* 99 * Default sizes of swap allocation chunks (see dmap.h). 100 * The actual values may be changed in vminit() based on MAXDSIZ. 101 * With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024. 102 * DMMIN should be at least ctod(1) so that vtod() works. 103 * vminit() insures this. 104 */ 105 #define DMMIN 32 /* smallest swap allocation */ 106 #define DMMAX 4096 /* largest potential swap allocation */ 107 108 /* 109 * Sizes of the system and user portions of the system page table. 110 */ 111 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 112 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 113 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 114 115 /* 116 * PTEs for mapping user space into the kernel for phyio operations. 117 * One page is enough to handle 4Mb of simultaneous raw IO operations. 118 */ 119 #ifndef USRIOSIZE 120 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 121 #endif 122 123 /* 124 * PTEs for system V style shared memory. 125 * This is basically slop for kmempt which we actually allocate (malloc) from. 126 */ 127 #ifndef SHMMAXPGS 128 #define SHMMAXPGS 1024 /* 4mb */ 129 #endif 130 131 /* 132 * Mach derived constants 133 */ 134 135 /* user/kernel map constants */ 136 #define VM_MIN_ADDRESS ((vaddr_t)0) 137 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 138 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 139 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0x00002000) 140 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000) 141 142 /* virtual sizes (bytes) for various kernel submaps */ 143 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 144 145 /* # of kernel PT pages (initial only, can grow dynamically) */ 146 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 147 148 /* pcb base */ 149 #define pcbb(p) ((u_int)(p)->p_addr) 150 151 /* Use new VM page bootstrap interface. */ 152 #define MACHINE_NEW_NONCONTIG 153 154 /* 155 * Constants which control the way the VM system deals with memory segments. 156 * The cesfic only has one usable 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 #define __HAVE_PMAP_PHYSSEG 166 167 /* 168 * pmap-specific data stored in the vm_physmem[] array. 169 */ 170 struct pmap_physseg { 171 struct pv_entry *pvent; /* pv table for this seg */ 172 char *attrs; /* page attributes for this seg */ 173 }; 174 175 #endif /* _MACHINE_VMPARAM_H_ */ 176