1 /* $NetBSD: vmparam.h,v 1.36 2011/02/08 20:20:07 rmind Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 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 and Ralph Campbell. 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) 4/22/94 39 */ 40 41 #ifndef _ALPHA_VMPARAM_H_ 42 #define _ALPHA_VMPARAM_H_ 43 44 /* 45 * Machine dependent constants for Alpha. 46 */ 47 48 /* 49 * All systypes currently supported by NetBSD/alpha have an 8K pages. 50 * Override the PAGE_* definitions to be compile-time constants. 51 */ 52 #define PAGE_SHIFT 13 53 #define PAGE_SIZE (1 << PAGE_SHIFT) 54 #define PAGE_MASK (PAGE_SIZE - 1) 55 56 /* 57 * USRSTACK is the top (end) of the user stack. 58 * 59 * Digital UNIX (formerly DEC OSF/1) places the stack below the 60 * text segment (i.e. growing downward from 4G). We may want to 61 * consider doing that at some point, but it might require changes 62 * to the exec code. 63 */ 64 #define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */ 65 66 /* 67 * Virtual memory related constants, all in bytes 68 */ 69 #ifndef MAXTSIZ 70 #define MAXTSIZ (1<<30) /* max text size (1G) */ 71 #endif 72 #ifndef DFLDSIZ 73 #define DFLDSIZ (1<<28) /* initial data size (256M) */ 74 #endif 75 #ifndef MAXDSIZ 76 #define MAXDSIZ (1<<30) /* max data size (1G) */ 77 #endif 78 #ifndef DFLSSIZ 79 #define DFLSSIZ (1<<21) /* initial stack size (2M) */ 80 #endif 81 #ifndef MAXSSIZ 82 #define MAXSSIZ (1<<25) /* max stack size (32M) */ 83 #endif 84 85 /* 86 * PTEs for mapping user space into the kernel for phyio operations. 87 * 64 pte's are enough to cover 8 disks * MAXBSIZE. 88 */ 89 #ifndef USRIOSIZE 90 #define USRIOSIZE 64 91 #endif 92 93 /* 94 * Mach derived constants 95 */ 96 97 /* user/kernel map constants */ 98 #define VM_MIN_ADDRESS ((vaddr_t)ALPHA_USEG_BASE) /* 0 */ 99 #define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */ 100 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 101 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE) 102 #define VM_MAX_KERNEL_ADDRESS trunc_page((vaddr_t)ALPHA_K1SEG_END) 103 104 /* virtual sizes (bytes) for various kernel submaps */ 105 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 106 107 /* some Alpha-specific constants */ 108 #define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */ 109 110 #define VM_PHYSSEG_MAX 16 /* XXX */ 111 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 112 113 #define VM_NFREELIST 1 114 #define VM_FREELIST_DEFAULT 0 115 116 #endif /* ! _ALPHA_VMPARAM_H_ */ 117