vmparam.h revision 1.3 
1/*	$NetBSD: vmparam.h,v 1.3 2002/03/23 02:23:00 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1988 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. 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
36#ifndef	_ARM32_VMPARAM_H_
37#define	_ARM32_VMPARAM_H_
38
39#ifdef _KERNEL
40
41#include <arm/arm32/vmparam.h>
42
43/*
44 * Address space constants
45 */
46
47/*
48 * The line between user space and kernel space
49 * Mappings >= KERNEL_SPACE_START are constant across all processes
50 */
51#define	KERNEL_SPACE_START	0xf0000000
52
53/* Various constants used by the MD code */
54#define	KERNEL_BASE		0xf0000000
55#define	KERNEL_TEXT_BASE	(KERNEL_BASE + 0x00000000)
56#define	APTE_BASE		(KERNEL_BASE + 0x00c00000)
57#define	KERNEL_VM_BASE		(KERNEL_BASE + 0x01000000)
58
59/*
60 * The range 0xf1000000 - 0xf6ffffff is available for kernel VM space
61 * OFW sits at 0xf7000000
62 */
63#define	KERNEL_VM_SIZE		0x06000000
64
65/*
66 * Override the default pager_map size, there's not enough KVA.
67 */
68#define PAGER_MAP_SIZE		(4 * 1024 * 1024)
69
70/*
71 * Size of User Raw I/O map
72 */
73
74#define USRIOSIZE       300
75
76/* XXX max. amount of KVM to be used by buffers. */
77#ifndef VM_MAX_KERNEL_BUF
78#define VM_MAX_KERNEL_BUF \
79	((KERNEL_VM_SIZE) * 4 / 10)
80#endif
81
82/* virtual sizes (bytes) for various kernel submaps */
83
84#define VM_PHYS_SIZE		(USRIOSIZE*NBPG)
85
86/*
87 * max number of non-contig chunks of physical RAM you can have
88 */
89
90#define	VM_PHYSSEG_MAX		32
91
92/*
93 * when converting a physical address to a vm_page structure, we
94 * want to use a binary search on the chunks of physical memory
95 * to find our RAM
96 */
97
98#define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
99
100/*
101 * this indicates that we can't add RAM to the VM system after the
102 * vm system is init'd.
103 */
104
105#define	VM_PHYSSEG_NOADD
106
107/*
108 * we support 2 free lists:
109 *
110 *	- DEFAULT for all systems
111 *	- ISADMA for the ISA DMA range on Sharks only
112 *	- RPCDMA for the DMA range on RiscPC's + Kinetic cards
113 */
114
115#define	VM_NFREELIST		2
116#define	VM_FREELIST_DEFAULT	0
117#define	VM_FREELIST_ISADMA	1
118#define VM_FREELIST_RPCDMA	1
119
120#endif /* _KERNEL */
121
122#endif	/* _ARM32_VMPARAM_H_ */
123