1 /* $NetBSD: vmparam.h,v 1.23 2011/02/08 20:20:21 rmind Exp $ */ 2 3 /* 4 * This file was taken from from mvme68k/include/vmparam.h and 5 * should probably be re-synced when needed. 6 * Darrin B Jewell <jewell@mit.edu> Fri Aug 28 03:22:07 1998 7 * original cvs id: NetBSD: vmparam.h,v 1.9 1998/08/22 10:55:34 scw Exp 8 */ 9 10 /* 11 * Copyright (c) 1988 University of Utah. 12 * Copyright (c) 1982, 1986, 1990, 1993 13 * The Regents of the University of California. All rights reserved. 14 * 15 * This code is derived from software contributed to Berkeley by 16 * the Systems Programming Group of the University of Utah Computer 17 * Science Department. 18 * 19 * Redistribution and use in source and binary forms, with or without 20 * modification, are permitted provided that the following conditions 21 * are met: 22 * 1. Redistributions of source code must retain the above copyright 23 * notice, this list of conditions and the following disclaimer. 24 * 2. Redistributions in binary form must reproduce the above copyright 25 * notice, this list of conditions and the following disclaimer in the 26 * documentation and/or other materials provided with the distribution. 27 * 3. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 * 43 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 44 * 45 * @(#)vmparam.h 8.2 (Berkeley) 4/19/94 46 */ 47 48 #ifndef _NEXT68K_VMPARAM_H_ 49 #define _NEXT68K_VMPARAM_H_ 50 51 /* 52 * Machine dependent constants for NEXT68K 53 */ 54 55 /* 56 * We use 4K pages on the NeXT. Override the PAGE_* definitions 57 * to be compile-time constants. 58 */ 59 #define PAGE_SHIFT PGSHIFT 60 #define PAGE_SIZE (1 << PAGE_SHIFT) 61 #define PAGE_MASK (PAGE_SIZE - 1) 62 63 /* 64 * USRSTACK is the top (end) of the user stack. 65 * 66 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 67 * is for HPUX compatibility. Why?? Because HPUX's debuggers 68 * have the user's stack hard-wired at FFF00000 for post-mortems, 69 * and we must be compatible... 70 */ 71 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 72 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 73 #define P1PAGES 0x100000 74 #define HIGHPAGES (0x100000/PAGE_SIZE) 75 76 /* 77 * Virtual memory related constants, all in bytes 78 */ 79 #ifndef MAXTSIZ 80 #define MAXTSIZ (8*1024*1024) /* max text size */ 81 #endif 82 #ifndef DFLDSIZ 83 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 84 #endif 85 #ifndef MAXDSIZ 86 #define MAXDSIZ (64*1024*1024) /* max data size */ 87 #endif 88 #ifndef DFLSSIZ 89 #define DFLSSIZ (512*1024) /* initial stack size limit */ 90 #endif 91 #ifndef MAXSSIZ 92 #define MAXSSIZ MAXDSIZ /* max stack size */ 93 #endif 94 95 /* 96 * Sizes of the system and user portions of the system page table. 97 */ 98 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 99 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 100 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 101 102 /* 103 * PTEs for mapping user space into the kernel for phyio operations. 104 * One page is enough to handle 4Mb of simultaneous raw IO operations. 105 */ 106 #ifndef USRIOSIZE 107 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 108 #endif 109 110 /* 111 * Mach derived constants 112 */ 113 114 /* user/kernel map constants */ 115 #define VM_MIN_ADDRESS ((vaddr_t)0) 116 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 117 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 118 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 119 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG*2)) 120 121 /* virtual sizes (bytes) for various kernel submaps */ 122 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 123 124 /* # of kernel PT pages (initial only, can grow dynamically) */ 125 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 126 127 /* 128 * Constants which control the way the VM system deals with memory segments. 129 */ 130 #define VM_PHYSSEG_MAX 5 /* @@@ should really come from N_SIMM */ 131 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 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_header *pvheader; /* pv table for this seg */ 142 }; 143 144 #endif /* _MVME68K_VMPARAM_H_ */ 145