xref: /netbsd-src/sys/arch/netwinder/include/vmparam.h (revision 1ffa7b76c40339c17a0fb2a09fac93f287cfc046)
1 /*	$NetBSD: vmparam.h,v 1.17 2003/05/03 03:29:11 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 + 0x0000c000)
55 #define	KERNEL_VM_BASE		(KERNEL_BASE + 0x01000000)
56 /*
57  * The Kernel VM Size varies depending on the machine depending on how
58  * much space is needed (and where) for other mappings.
59  * In some cases the chosen value may not be the maximum in order that
60  * we don't waste memory with kernel pages tables as we can't currently
61  * grow the kernel page tables after booting.
62  * You only need to increase these values if you find that the number of
63  * buffers is being limited due to lack of VA space.
64  */
65 /*
66  * The range 0xf1000000 - 0xfcffffff is available for kernel VM space
67  * Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff
68  */
69 #define KERNEL_VM_SIZE		0x0C000000
70 
71 /*
72  * Override the default pager_map size, there's not enough KVA.
73  */
74 #define PAGER_MAP_SIZE		(4 * 1024 * 1024)
75 
76 /*
77  * Size of User Raw I/O map
78  */
79 
80 #define USRIOSIZE       300
81 
82 /* XXX max. amount of KVM to be used by buffers. */
83 #ifndef VM_MAX_KERNEL_BUF
84 #define VM_MAX_KERNEL_BUF \
85 	((KERNEL_VM_SIZE) * 4 / 10)
86 #endif
87 
88 /* virtual sizes (bytes) for various kernel submaps */
89 
90 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
91 
92 /*
93  * max number of non-contig chunks of physical RAM you can have
94  */
95 
96 #define	VM_PHYSSEG_MAX		32
97 
98 /*
99  * when converting a physical address to a vm_page structure, we
100  * want to use a binary search on the chunks of physical memory
101  * to find our RAM
102  */
103 
104 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
105 
106 /*
107  * this indicates that we can't add RAM to the VM system after the
108  * vm system is init'd.
109  */
110 
111 #define	VM_PHYSSEG_NOADD
112 
113 /*
114  * we support 2 free lists:
115  *
116  *	- DEFAULT for all systems
117  *	- ISADMA for the ISA DMA range on Sharks only
118  */
119 
120 #define	VM_NFREELIST		2
121 #define	VM_FREELIST_DEFAULT	0
122 #define	VM_FREELIST_ISADMA	1
123 
124 #endif /* _KERNEL */
125 
126 #endif	/* _ARM32_VMPARAM_H_ */
127