1 /* $NetBSD: vmparam.h,v 1.42 2011/02/08 20:20:08 rmind Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 6 * 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. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 37 * 38 * @(#)vmparam.h 7.3 (Berkeley) 5/7/91 39 */ 40 41 #ifndef _MACHINE_VMPARAM_H_ 42 #define _MACHINE_VMPARAM_H_ 43 44 #include <machine/pte.h> 45 46 /* 47 * Machine dependent constants for amiga 48 */ 49 50 /* 51 * We use 8K pages on the Amiga. Override the PAGE_* definitions 52 * to be compie-time constants. 53 */ 54 #define PAGE_SHIFT PGSHIFT 55 #define PAGE_SIZE (1 << PAGE_SHIFT) 56 #define PAGE_MASK (PAGE_SIZE - 1) 57 58 /* 59 * USRSTACK is the top (end) of the user stack. 60 * 61 * These are a mixture of i386, sun3 and hp settings.. 62 */ 63 64 #ifndef USRSTACK 65 #define USRSTACK 0x1E000000 66 #endif 67 #define KUSER_AREA (-UPAGES*PAGE_SIZE) 68 /* 69 * Virtual memory related constants, all in bytes 70 */ 71 72 #ifndef MAXTSIZ 73 #define MAXTSIZ (6*1024*1024) /* max text size */ 74 #endif 75 #ifndef DFLDSIZ 76 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 77 #endif 78 #ifndef MAXDSIZ 79 #define MAXDSIZ (128*1024*1024) /* max data size */ 80 #endif 81 #ifndef DFLSSIZ 82 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 83 #endif 84 #ifndef MAXSSIZ 85 #define MAXSSIZ (32*1024*1024) /* max stack size */ 86 #endif 87 88 /* 89 * Sizes of the system and user portions of the system page table. 90 */ 91 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 92 #define SYSPTSIZE (2 * NPTEPG) /* 16mb */ 93 #define USRPTSIZE (1 * NPTEPG) /* 16mb */ 94 95 /* 96 * PTEs for mapping user space into the kernel for phyio operations. 97 * One page is enough to handle 16Mb of simultaneous raw IO operations. 98 */ 99 #ifndef USRIOSIZE 100 #define USRIOSIZE (1 * NPTEPG) /* 16mb */ 101 #endif 102 103 /* 104 * user/kernel map constants 105 */ 106 #define VM_MIN_ADDRESS ((vaddr_t)0) /* user min */ 107 #define VM_MAX_ADDRESS ((vaddr_t)(USRSTACK)) /* user max */ 108 #define VM_MAXUSER_ADDRESS ((vaddr_t)(VM_MAX_ADDRESS)) /* same */ 109 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 110 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-(NPTEPG * PAGE_SIZE)) 111 112 /* 113 * virtual sizes (bytes) for various kernel submaps 114 */ 115 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 116 117 /* 118 * Our bootloader currently passes up to 16 segments (but this is variable) 119 * Normally, the biggest of them is used for the kernel, and the kernel 120 * segment is given to VM first. 121 */ 122 #define VM_PHYSSEG_MAX (16) 123 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 124 125 /* 126 * Allow supporting Zorro-II memory as lower priority: 127 * 128 * - DEFAULT for Zorro-III memory (presumably 32 bit) 129 * - ZORROII for Zorro-II memory (16 bit, Zorro-II DMA) 130 */ 131 132 #define VM_NFREELIST 2 133 #define VM_FREELIST_DEFAULT 0 134 #define VM_FREELIST_ZORROII 1 135 136 #define __HAVE_PMAP_PHYSSEG 137 138 /* 139 * pmap-specific data stored in the vm_physmem[] array. 140 */ 141 struct pmap_physseg { 142 struct pv_header *pvheader; /* pv table for this seg */ 143 }; 144 145 /* 146 * number of kernel PT pages (initial only, can grow dynamically) 147 */ 148 #define VM_KERNEL_PT_PAGES ((vm_size_t)8) /* XXX: SYSPTSIZE */ 149 #endif /* !_MACHINE_VMPARAM_H_ */ 150