master
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