1 /* $OpenBSD: vmparam.h,v 1.25 2014/01/30 18:16:41 miod Exp $ */ 2 /* $NetBSD: vmparam.h,v 1.18 2000/05/22 17:13:54 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1988 University of Utah. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Systems Programming Group of the University of Utah Computer 11 * Science Department and Ralph Campbell. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$ 38 * 39 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 40 */ 41 42 #ifndef _MACHINE_VMPARAM_H_ 43 #define _MACHINE_VMPARAM_H_ 44 45 /* 46 * Machine dependent constants for Alpha. 47 */ 48 49 /* 50 * USRTEXT is the start of the user text/data space, while USRSTACK 51 * is the top (end) of the user stack. Immediately above the user stack 52 * resides the user structure, which is UPAGES long and contains the 53 * kernel stack. 54 * 55 * Digital UNIX (formerly DEC OSF/1) places the stack below the 56 * text segment (i.e. growing downward from 4G). We may want to 57 * consider doing that at some point, but it might require changes 58 * to the exec code. 59 */ 60 #define USRTEXT PAGE_SIZE 61 #define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */ 62 63 /* 64 * Virtual memory related constants, all in bytes 65 */ 66 #ifndef MAXTSIZ 67 #define MAXTSIZ (1*1024*1024*1024) /* max text size */ 68 #endif 69 #ifndef DFLDSIZ 70 #define DFLDSIZ (128*1024*1024) /* initial data size */ 71 #endif 72 #ifndef MAXDSIZ 73 #define MAXDSIZ (1*1024*1024*1024) /* max data size */ 74 #endif 75 #ifndef BRKSIZ 76 #define BRKSIZ MAXDSIZ /* heap gap size */ 77 #endif 78 #ifndef DFLSSIZ 79 #define DFLSSIZ (2*1024*1024) /* initial stack size */ 80 #endif 81 #ifndef MAXSSIZ 82 #define MAXSSIZ (32*1024*1024) /* max stack size */ 83 #endif 84 85 #define STACKGAP_RANDOM 256*1024 86 87 /* 88 * PTEs for mapping user space into the kernel for physio operations. 89 * 64 pte's are enough to cover 8 disks * MAXBSIZE. 90 */ 91 #ifndef USRIOSIZE 92 #define USRIOSIZE 64 93 #endif 94 95 /* 96 * PTEs for system V style shared memory. 97 * This is basically slop for kmempt which we actually allocate (malloc) from. 98 */ 99 #ifndef SHMMAXPGS 100 #define SHMMAXPGS 4096 /* 32mb */ 101 #endif 102 103 /* 104 * Mach derived constants 105 */ 106 107 /* user/kernel map constants */ 108 #define VM_MIN_ADDRESS ((vaddr_t)PAGE_SIZE) 109 #define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */ 110 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 111 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE) 112 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_END) 113 114 /* map PIE into the first quarter of the address space before stack */ 115 #define VM_PIE_MIN_ADDR PAGE_SIZE 116 #define VM_PIE_MAX_ADDR 0x80000000 117 118 /* virtual sizes (bytes) for various kernel submaps */ 119 #define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE) 120 121 /* some Alpha-specific constants */ 122 #define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */ 123 124 #define VM_PHYSSEG_MAX 16 /* XXX */ 125 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 126 #define VM_PHYSSEG_NOADD /* no more after vm_mem_init */ 127 128 #endif /* ! _MACHINE_VMPARAM_H_ */ 129