1/*	$NetBSD: vmparam.h,v 1.41 2010/12/28 18:31:05 mhitch Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 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 * 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	7.3 (Berkeley) 5/7/91
39 */
40
41#ifndef _MACHINE_VMPARAM_H_
42#define _MACHINE_VMPARAM_H_
43
44#include <machine/pte.h>
45
46/*
47 * Machine dependent constants for amiga
48 */
49
50/*
51 * We use 8K pages on the Amiga.  Override the PAGE_* definitions
52 * to be compie-time constants.
53 */
54#define	PAGE_SHIFT	PGSHIFT
55#define	PAGE_SIZE	(1 << PAGE_SHIFT)
56#define	PAGE_MASK	(PAGE_SIZE - 1)
57
58/*
59 * USRSTACK is the top (end) of the user stack.
60 *
61 * These are a mixture of i386, sun3 and hp settings..
62 */
63
64#ifndef USRSTACK
65#define	USRSTACK	0x1E000000
66#endif
67#define KUSER_AREA	(-UPAGES*PAGE_SIZE)
68/*
69 * Virtual memory related constants, all in bytes
70 */
71
72#ifndef MAXTSIZ
73#define	MAXTSIZ		(6*1024*1024)		/* max text size */
74#endif
75#ifndef DFLDSIZ
76#define	DFLDSIZ		(32*1024*1024)		/* initial data size limit */
77#endif
78#ifndef MAXDSIZ
79#define	MAXDSIZ		(128*1024*1024)		/* max data size */
80#endif
81#ifndef	DFLSSIZ
82#define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
83#endif
84#ifndef	MAXSSIZ
85#define	MAXSSIZ		(32*1024*1024)		/* max stack size */
86#endif
87
88/*
89 * Sizes of the system and user portions of the system page table.
90 */
91/* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
92#define	SYSPTSIZE	(2 * NPTEPG)	/* 16mb */
93#define	USRPTSIZE 	(1 * NPTEPG)	/* 16mb */
94
95/*
96 * PTEs for mapping user space into the kernel for phyio operations.
97 * One page is enough to handle 16Mb of simultaneous raw IO operations.
98 */
99#ifndef USRIOSIZE
100#define USRIOSIZE	(1 * NPTEPG)	/* 16mb */
101#endif
102
103/*
104 * user/kernel map constants
105 */
106#define VM_MIN_ADDRESS		((vaddr_t)0)		/* user min */
107#define VM_MAX_ADDRESS		((vaddr_t)(USRSTACK))	/* user max */
108#define VM_MAXUSER_ADDRESS	((vaddr_t)(VM_MAX_ADDRESS))	/* same */
109#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0)
110#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)-(NPTEPG * PAGE_SIZE))
111
112/*
113 * virtual sizes (bytes) for various kernel submaps
114 */
115#define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
116
117/*
118 * Our bootloader currently passes up to 16 segments (but this is variable)
119 * Normally, the biggest of them is used for the kernel, and the kernel
120 * segment is given to VM first.
121 */
122#define VM_PHYSSEG_MAX		(16)
123#define VM_PHYSSEG_STRAT	VM_PSTRAT_RANDOM
124
125/*
126 * Allow supporting Zorro-II memory as lower priority:
127 *
128 *	- DEFAULT for Zorro-III memory (presumably 32 bit)
129 *	- ZORROII for Zorro-II memory (16 bit, Zorro-II DMA)
130 */
131
132#define VM_NFREELIST		2
133#define VM_FREELIST_DEFAULT	0
134#define VM_FREELIST_ZORROII	1
135
136#define	__HAVE_PMAP_PHYSSEG
137
138/*
139 * pmap-specific data stored in the vm_physmem[] array.
140 */
141struct pmap_physseg {
142	struct pv_header *pvheader;	/* pv table for this seg */
143};
144
145/*
146 * number of kernel PT pages (initial only, can grow dynamically)
147 */
148#define VM_KERNEL_PT_PAGES	((vm_size_t)8)		/* XXX: SYSPTSIZE */
149#endif /* !_MACHINE_VMPARAM_H_ */
150