1 /* $NetBSD: vmparam.h,v 1.25 2024/05/14 19:00:43 andvar 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. 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 8.2 (Berkeley) 4/19/94 39 */ 40 41 #ifndef _MACHINE_VMPARAM_H_ 42 #define _MACHINE_VMPARAM_H_ 43 44 /* 45 * Use common m68k definitions to define PAGE_SIZE and related constants. 46 */ 47 #include <m68k/vmparam.h> 48 49 /* 50 * USRSTACK is the top (end) of the user stack. 51 */ 52 #define USRSTACK VM_MAXUSER_ADDRESS 53 54 /* 55 * Virtual memory related constants, all in bytes 56 */ 57 #ifndef MAXTSIZ 58 #define MAXTSIZ (32*1024*1024) /* max text size */ 59 #endif 60 #ifndef DFLDSIZ 61 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 62 #endif 63 #ifndef MAXDSIZ 64 #define MAXDSIZ (64*1024*1024) /* max data size */ 65 #endif 66 #ifndef DFLSSIZ 67 #define DFLSSIZ (512*1024) /* initial stack size limit */ 68 #endif 69 #ifndef MAXSSIZ 70 #define MAXSSIZ MAXDSIZ /* max stack size */ 71 #endif 72 73 /* 74 * PTEs for mapping user space into the kernel for phyio operations. 75 * One page is enough to handle 4Mb of simultaneous raw IO operations. 76 */ 77 #ifndef USRIOSIZE 78 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 79 #endif 80 81 /* 82 * Mach derived constants 83 */ 84 85 /* user/kernel map constants */ 86 #define VM_MIN_ADDRESS ((vaddr_t)0) 87 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 88 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 89 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 90 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0x40000000-PAGE_SIZE*NPTEPG)) 91 92 /* virtual sizes (bytes) for various kernel submaps */ 93 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 94 95 /* # of kernel PT pages (initial only, can grow dynamically) */ 96 #define VM_KERNEL_PT_PAGES ((vsize_t)2) 97 98 /* 99 * Constants which control the way the VM system deals with memory segments. 100 * Only one physical contiguous memory segment. 101 */ 102 #define VM_PHYSSEG_MAX 1 103 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 104 105 #define VM_NFREELIST 1 106 #define VM_FREELIST_DEFAULT 0 107 108 #define __HAVE_PMAP_PHYSSEG 109 110 /* 111 * pmap-specific data stored in the vm_physmem[] array. 112 */ 113 struct pmap_physseg { 114 struct pv_header *pvheader; /* pv table for this seg */ 115 }; 116 117 #endif /* _MACHINE_VMPARAM_H_ */ 118