1 /* $NetBSD: vmparam.h,v 1.24 2003/04/02 07:36:01 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 _MVME68K_VMPARAM_H_ 46 #define _MVME68K_VMPARAM_H_ 47 48 /* 49 * Machine dependent constants for MVME68K 50 */ 51 52 /* 53 * We use 4K pages on the mvme68k. 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 * Need a small pager map for the benefit of low-memory models. 62 * To avoid using a needlessly small value on larger memory models, 63 * this is calculated at runtime. 64 */ 65 #ifndef PAGER_MAP_SIZE 66 extern int mvme68k_pager_map_size; 67 #define PAGER_MAP_SIZE ((vsize_t) mvme68k_pager_map_size) 68 #endif 69 70 /* 71 * USRSTACK is the top (end) of the user stack. 72 * 73 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 74 * is for HPUX compatibility. Why?? Because HPUX's debuggers 75 * have the user's stack hard-wired at FFF00000 for post-mortems, 76 * and we must be compatible... 77 */ 78 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 79 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 80 #define P1PAGES 0x100000 81 #define HIGHPAGES (0x100000/PAGE_SIZE) 82 83 /* 84 * Virtual memory related constants, all in bytes 85 */ 86 #ifndef MAXTSIZ 87 #define MAXTSIZ (8*1024*1024) /* max text size */ 88 #endif 89 #ifndef DFLDSIZ 90 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 91 #endif 92 #ifndef MAXDSIZ 93 #define MAXDSIZ (64*1024*1024) /* max data size */ 94 #endif 95 #ifndef DFLSSIZ 96 #define DFLSSIZ (512*1024) /* initial stack size limit */ 97 #endif 98 #ifndef MAXSSIZ 99 #define MAXSSIZ MAXDSIZ /* max stack size */ 100 #endif 101 102 /* 103 * Sizes of the system and user portions of the system page table. 104 */ 105 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 106 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 107 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 108 109 /* 110 * PTEs for mapping user space into the kernel for phyio operations. 111 * One page is enough to handle 4Mb of simultaneous raw IO operations. 112 */ 113 #ifndef USRIOSIZE 114 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 115 #endif 116 117 /* 118 * PTEs for system V style shared memory. 119 * This is basically slop for kmempt which we actually allocate (malloc) from. 120 */ 121 #ifndef SHMMAXPGS 122 #define SHMMAXPGS 1024 /* 4mb */ 123 #endif 124 125 /* 126 * Mach derived constants 127 */ 128 129 /* user/kernel map constants */ 130 #define VM_MIN_ADDRESS ((vaddr_t)0) 131 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 132 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 133 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 134 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000) 135 136 /* virtual sizes (bytes) for various kernel submaps */ 137 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 138 139 /* # of kernel PT pages (initial only, can grow dynamically) */ 140 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 141 142 /* 143 * Constants which control the way the VM system deals with memory segments. 144 * The mvme68k port has two physical memory segments: 1 for onboard RAM 145 * and another for contiguous VMEbus RAM. 146 */ 147 #define VM_PHYSSEG_MAX 2 148 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 149 #define VM_PHYSSEG_NOADD 150 151 #define VM_NFREELIST 2 152 #define VM_FREELIST_DEFAULT 0 153 #define VM_FREELIST_VMEMEM 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 #endif /* _MVME68K_VMPARAM_H_ */ 166