vmparam.h revision 1.18 
1/*	$NetBSD: vmparam.h,v 1.18 2011/02/08 20:20:16 rmind Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 1990, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
37 *
38 *	@(#)vmparam.h	8.2 (Berkeley) 4/19/94
39 */
40
41#ifndef _MACHINE_VMPARAM_H_
42#define _MACHINE_VMPARAM_H_
43
44/*
45 * We use 4K pages on the luna68k.  Override the PAGE_* definitions
46 * to be compile-time constants.
47 */
48#define	PAGE_SHIFT	PGSHIFT
49#define	PAGE_SIZE	(1 << PAGE_SHIFT)
50#define	PAGE_MASK	(PAGE_SIZE - 1)
51
52/*
53 * USRSTACK is the top (end) of the user stack.
54 */
55#define USRSTACK	VM_MAXUSER_ADDRESS
56
57/*
58 * Virtual memory related constants, all in bytes
59 */
60#ifndef MAXTSIZ
61#define MAXTSIZ		(8*1024*1024)		/* max text size */
62#endif
63#ifndef DFLDSIZ
64#define DFLDSIZ		(16*1024*1024)		/* initial data size limit */
65#endif
66#ifndef MAXDSIZ
67#define MAXDSIZ		(64*1024*1024)		/* max data size */
68#endif
69#ifndef	DFLSSIZ
70#define DFLSSIZ		(512*1024)		/* initial stack size limit */
71#endif
72#ifndef	MAXSSIZ
73#define MAXSSIZ		MAXDSIZ			/* max stack size */
74#endif
75
76/*
77 * Sizes of the system and user portions of the system page table.
78 */
79/* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
80#define SYSPTSIZE	(2 * NPTEPG)	/* 8mb */
81#define USRPTSIZE 	(1 * NPTEPG)	/* 4mb */
82
83/*
84 * PTEs for mapping user space into the kernel for phyio operations.
85 * One page is enough to handle 4Mb of simultaneous raw IO operations.
86 */
87#ifndef USRIOSIZE
88#define USRIOSIZE	(1 * NPTEPG)	/* 4mb */
89#endif
90
91/*
92 * Mach derived constants
93 */
94
95/* user/kernel map constants */
96#define VM_MIN_ADDRESS		((vaddr_t)0)
97#define VM_MAXUSER_ADDRESS	((vaddr_t)0xFFFC0000)
98#define VM_MAX_ADDRESS		((vaddr_t)0xFFFC0000)
99#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
100#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)(0x40000000-PAGE_SIZE*NPTEPG))
101
102/* virtual sizes (bytes) for various kernel submaps */
103#define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
104
105/* # of kernel PT pages (initial only, can grow dynamically) */
106#define VM_KERNEL_PT_PAGES	((vsize_t)2)		/* XXX: SYSPTSIZE */
107
108/*
109 * Constants which control the way the VM system deals with memory segments.
110 * Only one physical contigous memory segment.
111 */
112#define VM_PHYSSEG_MAX		1
113#define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
114
115#define VM_NFREELIST		1
116#define VM_FREELIST_DEFAULT	0
117
118#define	__HAVE_PMAP_PHYSSEG
119
120/*
121 * pmap-specific data stored in the vm_physmem[] array.
122 */
123struct pmap_physseg {
124	struct pv_header *pvheader;	/* pv table for this seg */
125};
126
127#endif /* _MACHINE_VMPARAM_H_ */
128