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