vmparam.h revision 1.4 
1/*	$NetBSD: vmparam.h,v 1.4 2002/03/23 02:54:01 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_BASE are constant across all processes
50 */
51#define	KERNEL_BASE		0xf0000000
52
53/* Various constants used by the MD code */
54#define	KERNEL_TEXT_BASE	(KERNEL_BASE + 0x00000000)
55#define	APTE_BASE		(KERNEL_BASE + 0x00c00000)
56#define	KERNEL_VM_BASE		(KERNEL_BASE + 0x01000000)
57
58/*
59 * The range 0xf1000000 - 0xf6ffffff is available for kernel VM space
60 * OFW sits at 0xf7000000
61 */
62#define	KERNEL_VM_SIZE		0x06000000
63
64/*
65 * Override the default pager_map size, there's not enough KVA.
66 */
67#define PAGER_MAP_SIZE		(4 * 1024 * 1024)
68
69/*
70 * Size of User Raw I/O map
71 */
72
73#define USRIOSIZE       300
74
75/* XXX max. amount of KVM to be used by buffers. */
76#ifndef VM_MAX_KERNEL_BUF
77#define VM_MAX_KERNEL_BUF \
78	((KERNEL_VM_SIZE) * 4 / 10)
79#endif
80
81/* virtual sizes (bytes) for various kernel submaps */
82
83#define VM_PHYS_SIZE		(USRIOSIZE*NBPG)
84
85/*
86 * max number of non-contig chunks of physical RAM you can have
87 */
88
89#define	VM_PHYSSEG_MAX		32
90
91/*
92 * when converting a physical address to a vm_page structure, we
93 * want to use a binary search on the chunks of physical memory
94 * to find our RAM
95 */
96
97#define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
98
99/*
100 * this indicates that we can't add RAM to the VM system after the
101 * vm system is init'd.
102 */
103
104#define	VM_PHYSSEG_NOADD
105
106/*
107 * we support 2 free lists:
108 *
109 *	- DEFAULT for all systems
110 *	- ISADMA for the ISA DMA range on Sharks only
111 *	- RPCDMA for the DMA range on RiscPC's + Kinetic cards
112 */
113
114#define	VM_NFREELIST		2
115#define	VM_FREELIST_DEFAULT	0
116#define	VM_FREELIST_ISADMA	1
117#define VM_FREELIST_RPCDMA	1
118
119#endif /* _KERNEL */
120
121#endif	/* _ARM32_VMPARAM_H_ */
122