1/*	$NetBSD: vmparam.h,v 1.42.18.1 2023/02/08 16:40:45 martin 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/*
 44 * Machine dependent constants for Sun 4U and 4V UltraSPARC
 45 */
 46
 47#ifndef VMPARAM_H
 48#define VMPARAM_H
 49
 50#define __USE_TOPDOWN_VM
 51
 52/*
 53 * We use 8K VM pages on the Sun4U.  Override the PAGE_* definitions
 54 * to be compile-time constants.
 55 */
 56#define	PAGE_SHIFT	13
 57#define	PAGE_SIZE	(1 << PAGE_SHIFT)
 58#define	PAGE_MASK	(PAGE_SIZE - 1)
 59
 60/*
 61 * Default pager_map of 16MB is awfully small.  There is plenty
 62 * of VA so use it.
 63 */
 64#define        PAGER_MAP_DEFAULT_SIZE (512 * 1024 * 1024)
 65
 66/*
 67 * Defaults for Unified Buffer Cache parameters.
 68 */
 69
 70#ifndef UBC_WINSHIFT
 71#define	UBC_WINSHIFT	16	/* 64kB */
 72#endif
 73#ifndef UBC_NWINS
 74#define	UBC_NWINS	4096	/* 256MB */
 75#endif
 76
 77/*
 78 * The kernel itself is mapped by the boot loader with 4Mb locked VM pages,
 79 * so let's keep 4Mb definitions here as well.
 80 */
 81#define PAGE_SHIFT_4M	22
 82#define PAGE_SIZE_4M	(1UL<<PAGE_SHIFT_4M)
 83#define PAGE_MASK_4M	(PAGE_SIZE_4M-1)
 84
 85/*
 86 * USRSTACK is the top (end) of the user stack.
 87 */
 88#define USRSTACK32	0xffffe000L
 89#ifdef __arch64__
 90#define USRSTACK	0xffffffffffffe000L
 91#else
 92#define USRSTACK	USRSTACK32
 93#endif
 94
 95/*
 96 * Virtual memory related constants, all in bytes
 97 */
 98#if __arch64__
 99/*
100 * 64-bit limits:
101 *
102 * Since the compiler generates `call' instructions we can't
103 * have more than 4GB in a single text segment.
104 *
105 * And since we only have a 40-bit adderss space, allow half
106 * of that for data and the other half for stack.
107 */
108#ifndef MAXTSIZ
109#define	MAXTSIZ		(4UL*1024*1024*1024)	/* max text size */
110#endif
111#ifndef DFLDSIZ
112#define	DFLDSIZ		(128UL*1024*1024)	/* initial data size limit */
113#endif
114#ifndef MAXDSIZ
115#define	MAXDSIZ		(1UL<<39)		/* 512GB max data size */
116/*
117 * For processes not using topdown VA, we need to limit the data size -
118 * they probably have not been compiled with the proper compiler memory
119 * model.
120 */
121#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
122    round_page((vaddr_t)(da) + (vsize_t)uimax(maxdmap,1UL*1024*1024*1024))
123#endif
124#ifndef	DFLSSIZ
125#define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
126#endif
127#ifndef	MAXSSIZ
128#define	MAXSSIZ		(128*1024*1024)		/* max stack size */
129#endif
130#else
131/*
132 * 32-bit limits:
133 *
134 * We only have 4GB to play with.  Limit data, and text
135 * each to half of that and set a reasonable stack limit.
136 *
137 */
138#ifndef MAXTSIZ
139#define	MAXTSIZ		(2UL*1024*1024*1024)	/* max text size */
140#endif
141#ifndef DFLDSIZ
142#define	DFLDSIZ		(128*1024*1024)		/* initial data size limit */
143#endif
144#ifndef MAXDSIZ
145#define	MAXDSIZ		(2UL*1024*1024*1024)	/* max data size */
146#endif
147#ifndef	DFLSSIZ
148#define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
149#endif
150#ifndef	MAXSSIZ
151#define	MAXSSIZ		(64*1024*1024)		/* max stack size */
152#endif
153#endif
154
155/*
156 * 32-bit emulation limits (same as sparc - we could go bigger)
157 */
158#ifndef DFLDSIZ32
159#define	DFLDSIZ32	(64*1024*1024)		/* initial data size limit */
160#endif
161#ifndef MAXDSIZ32
162#define	MAXDSIZ32	(512*1024*1024)		/* max data size */
163#endif
164#ifndef	DFLSSIZ32
165#define	DFLSSIZ32	(2*1024*1024)		/* initial stack size limit */
166#endif
167#ifndef	MAXSSIZ32
168#define	MAXSSIZ32	(32*1024*1024)		/* max stack size */
169#endif
170
171/*
172 * Mach derived constants
173 */
174
175/*
176 * User/kernel map constants.
177 */
178#define VM_MIN_ADDRESS		((vaddr_t)0)
179#define VM_MAX_ADDRESS		(((vaddr_t)(-1))&~PGOFSET)
180#define VM_MAXUSER_ADDRESS	VM_MAX_ADDRESS
181#define VM_MAXUSER_ADDRESS32	((vaddr_t)(0x00000000ffffffffL&~PGOFSET))
182
183#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)KERNBASE)
184#ifdef __arch64__
185#define	VM_KERNEL_MEM_VA_START	((vaddr_t)0x100000000UL)
186#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)0x000007ffffffffffUL)
187#else
188#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)KERNEND)
189#endif
190
191#define VM_PHYSSEG_MAX          32       /* up to 32 segments */
192#define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
193
194#define	VM_NFREELIST		1
195#define	VM_FREELIST_DEFAULT	0
196
197#endif