1/* $OpenBSD: vmparam.h,v 1.30 2023/04/13 19:39:50 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#define USRSTACK ((vaddr_t)0x0000040000000000ULL) /* 4T */ 50 51/* 52 * Virtual memory related constants, all in bytes 53 */ 54#ifndef MAXTSIZ 55#define MAXTSIZ (1*1024*1024*1024) /* max text size */ 56#endif 57#ifndef DFLDSIZ 58#define DFLDSIZ (128*1024*1024) /* initial data size */ 59#endif 60#ifndef MAXDSIZ 61#define MAXDSIZ (1*1024*1024*1024) /* max data size */ 62#endif 63#ifndef BRKSIZ 64#define BRKSIZ MAXDSIZ /* heap gap size */ 65#endif 66#ifndef DFLSSIZ 67#define DFLSSIZ (2*1024*1024) /* initial stack size */ 68#endif 69#ifndef MAXSSIZ 70#define MAXSSIZ (32*1024*1024) /* max stack size */ 71#endif 72 73#define STACKGAP_RANDOM 256*1024 74 75/* 76 * PTEs for mapping user space into the kernel for physio operations. 77 * 64 pte's are enough to cover 8 disks * MAXBSIZE. 78 */ 79#ifndef USRIOSIZE 80#define USRIOSIZE 64 81#endif 82 83/* 84 * PTEs for system V style shared memory. 85 * This is basically slop for kmempt which we actually allocate (malloc) from. 86 */ 87#ifndef SHMMAXPGS 88#define SHMMAXPGS 4096 /* 32mb */ 89#endif 90 91/* 92 * Mach derived constants 93 */ 94 95/* user/kernel map constants */ 96#define VM_MIN_ADDRESS ((vaddr_t)PAGE_SIZE) 97#define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */ 98#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 99#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE) 100#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_END) 101 102/* map PIE into the first quarter of the address space before stack */ 103#define VM_PIE_MIN_ADDR PAGE_SIZE 104#define VM_PIE_MAX_ADDR 0x80000000 105 106/* virtual sizes (bytes) for various kernel submaps */ 107#define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE) 108 109/* some Alpha-specific constants */ 110#define VPTBASE ((vaddr_t)0xfffffffc00000000UL) /* Virt. pg table */ 111 112#define VM_PHYSSEG_MAX 16 /* XXX */ 113#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 114#define VM_PHYSSEG_NOADD /* no more after vm_mem_init */ 115 116#endif /* ! _MACHINE_VMPARAM_H_ */ 117