1 /* $NetBSD: vmparam.h,v 1.48 2019/03/29 20:18:09 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. 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 * @(#)vmparam.h 8.1 (Berkeley) 6/11/93 41 */ 42 43 #ifndef _SPARC_VMPARAM_H_ 44 #define _SPARC_VMPARAM_H_ 45 46 #define __USE_TOPDOWN_VM 47 48 /* 49 * Machine dependent constants for SPARC 50 */ 51 52 #include <machine/cpuconf.h> 53 54 /* 55 * Sun4 systems have a 8K page size. All other platforms have a 56 * 4K page size. We need to define these upper and lower limits 57 * for machine-independent code. We also try to make PAGE_SIZE, 58 * PAGE_SHIFT, and PAGE_MASK into compile-time constants, if we can. 59 * 60 * XXX Should garbage-collect the version of this from <machine/param.h>. 61 */ 62 #define PAGE_SHIFT_SUN4 13 63 #define PAGE_SHIFT_SUN4CM 12 64 65 #define MAX_PAGE_SHIFT PAGE_SHIFT_SUN4 66 #define MIN_PAGE_SHIFT PAGE_SHIFT_SUN4CM 67 68 #define MIN_PAGE_SIZE (1 << MIN_PAGE_SHIFT) 69 #define MAX_PAGE_SIZE (1 << MAX_PAGE_SHIFT) 70 71 #if CPU_NTYPES != 0 && !defined(SUN4) 72 #define PAGE_SHIFT PAGE_SHIFT_SUN4CM 73 #elif CPU_NTYPES == 1 && defined(SUN4) 74 #define PAGE_SHIFT PAGE_SHIFT_SUN4 75 #endif 76 77 #ifdef PAGE_SHIFT 78 #define PAGE_SIZE (1 << PAGE_SHIFT) 79 #define PAGE_MASK (PAGE_SIZE - 1) 80 #endif 81 82 /* 83 * USRSTACK is the top (end) of the user stack. 84 */ 85 #define USRSTACK KERNBASE /* Start of user stack */ 86 87 /* 88 * Virtual memory related constants, all in bytes 89 */ 90 #ifndef MAXTSIZ 91 #define MAXTSIZ (64*1024*1024) /* max text size */ 92 #endif 93 #ifndef DFLDSIZ 94 #define DFLDSIZ (64*1024*1024) /* initial data size limit */ 95 #endif 96 #ifndef MAXDSIZ 97 #define MAXDSIZ (512*1024*1024) /* max data size */ 98 #endif 99 #ifndef DFLSSIZ 100 #define DFLSSIZ (8*1024*1024) /* initial stack size limit */ 101 #endif 102 #ifndef MAXSSIZ 103 #define MAXSSIZ (32*1024*1024) /* max stack size */ 104 #endif 105 106 /* 107 * Mach derived constants 108 */ 109 110 /* 111 * User/kernel map constants. Note that sparc/vaddrs.h defines the 112 * IO space virtual base, which must be the same as VM_MAX_KERNEL_ADDRESS: 113 * tread with care. 114 */ 115 #define VM_MIN_ADDRESS ((vaddr_t)0) 116 #define VM_MAX_ADDRESS ((vaddr_t)KERNBASE) 117 #define VM_MAXUSER_ADDRESS ((vaddr_t)KERNBASE) 118 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 119 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERNEND) 120 121 #define VM_PHYSSEG_MAX 32 /* up to 32 segments */ 122 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 123 124 #define VM_NFREELIST 1 125 #define VM_FREELIST_DEFAULT 0 126 127 #endif /* _SPARC_VMPARAM_H_ */ 128