1 /* $NetBSD: vmparam.h,v 1.40 2020/02/01 19:41:50 tsutsui 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 _X68K_VMPARAM_H_ 42 #define _X68K_VMPARAM_H_ 43 44 /* 45 * Machine dependent constants for X68K 46 */ 47 48 /* 49 * Use common m68k definitions to define PAGE_SIZE and related constants. 50 */ 51 #include <m68k/vmparam.h> 52 53 /* 54 * USRSTACK is the top (end) of the user stack. 55 */ 56 #define USRSTACK VM_MAXUSER_ADDRESS /* Start of user stack */ 57 58 /* 59 * Virtual memory related constants, all in bytes 60 */ 61 #ifndef MAXTSIZ 62 #define MAXTSIZ (32*1024*1024) /* max text size */ 63 #endif 64 #ifndef DFLDSIZ 65 #define DFLDSIZ (16*1024*1024) /* initial data size limit */ 66 #endif 67 #ifndef MAXDSIZ 68 #define MAXDSIZ (64*1024*1024) /* max data size */ 69 #endif 70 #ifndef DFLSSIZ 71 #define DFLSSIZ (512*1024) /* initial stack size limit */ 72 #endif 73 #ifndef MAXSSIZ 74 #define MAXSSIZ MAXDSIZ /* max stack size */ 75 #endif 76 77 /* 78 * PTEs for mapping user space into the kernel for phyio operations. 79 * One page is enough to handle 4Mb of simultaneous raw IO operations. 80 */ 81 #ifndef USRIOSIZE 82 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 83 #endif 84 85 /* 86 * Mach derived constants 87 */ 88 89 /* user/kernel map constants */ 90 #define VM_MIN_ADDRESS ((vaddr_t)0) 91 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 92 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 93 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 94 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-PAGE_SIZE*NPTEPG)) 95 96 /* virtual sizes (bytes) for various kernel submaps */ 97 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 98 99 /* # of kernel PT pages (initial only, can grow dynamically) */ 100 #define VM_KERNEL_PT_PAGES ((vsize_t)4) 101 102 /* 103 * Constants which control the way the VM system deals with memory segments. 104 */ 105 #define VM_PHYSSEG_MAX 3 106 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 107 /* Actually VM_PSTRAT_UPPERFIRST is needed */ 108 109 #define VM_NFREELIST 2 110 #define VM_FREELIST_DEFAULT 0 111 #define VM_FREELIST_HIGHMEM VM_FREELIST_DEFAULT 112 #define VM_FREELIST_MAINMEM 1 113 114 #define __HAVE_PMAP_PHYSSEG 115 116 /* 117 * pmap-specific data stored in the vm_physmem[] array. 118 */ 119 struct pmap_physseg { 120 struct pv_header *pvheader; /* pv table for this seg */ 121 }; 122 123 #endif /* _X68K_VMPARAM_H_ */ 124