1/* $OpenBSD: vmparam.h,v 1.9 2023/04/28 18:33:22 robert Exp $ */
2/* $NetBSD: vmparam.h,v 1.1 2003/04/26 18:39:49 fvdl Exp $ */
3
4/*-
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91
36 */
37
38#ifndef _MACHINE_VMPARAM_H_
39#define _MACHINE_VMPARAM_H_
40
41/*
42 * Machine dependent constants for arm64.
43 */
44
45#define USRSTACK VM_MAXUSER_ADDRESS
46
47/*
48 * Virtual memory related constants, all in bytes
49 */
50#define MAXTSIZ ((paddr_t)256*1024*1024) /* max text size */
51#ifndef DFLDSIZ
52#define DFLDSIZ ((paddr_t)512*1024*1024) /* initial data size limit */
53#endif
54#ifndef MAXDSIZ
55#define MAXDSIZ ((paddr_t)64*1024*1024*1024) /* max data size */
56#endif
57#ifndef BRKSIZ
58#define BRKSIZ ((paddr_t)16*1024*1024*1024) /* heap gap size */
59#endif
60#ifndef DFLSSIZ
61#define DFLSSIZ ((paddr_t)2*1024*1024) /* initial stack size limit */
62#endif
63#ifndef MAXSSIZ
64#define MAXSSIZ ((paddr_t)32*1024*1024) /* max stack size */
65#endif
66
67#define STACKGAP_RANDOM 256*1024
68
69/*
70 * Size of shared memory map
71 */
72#ifndef SHMMAXPGS
73#define SHMMAXPGS 1024
74#endif
75
76/*
77 * Size of User Raw I/O map
78 */
79#define USRIOSIZE 300
80
81/*
82 * Kernel base
83 */
84#define KERNEL_BASE 0xffffff8000000000ULL
85
86/*
87 * Mach derived constants
88 */
89
90/* user/kernel map constants */
91#define VM_MIN_ADDRESS ((vaddr_t)PAGE_SIZE)
92#define USER_SPACE_BITS 39
93#define VM_MAXUSER_ADDRESS ((1ULL << USER_SPACE_BITS) - 0x8000)
94#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
95#ifdef _KERNEL
96#define VM_MIN_STACK_ADDRESS (3ULL << (USER_SPACE_BITS - 2))
97#endif
98#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xffffff8000000000ULL)
99#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xffffff83ffffffffULL)
100
101/* virtual sizes (bytes) for various kernel submaps */
102#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
103
104#define VM_PHYSSEG_MAX 32
105#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
106#define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */
107
108#endif /* _MACHINE_VMPARAM_H_ */