vmparam.h revision 1.4 
1/*	$NetBSD: vmparam.h,v 1.4 2003/04/02 07:36:03 thorpej Exp $	*/
2
3/*-
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#ifndef _MACHINE_VMPARAM_H_
35#define _MACHINE_VMPARAM_H_
36
37/*
38 * We use 16K pages on IBM4xx CPUs.  Override the PAGE_* definitions
39 * to be compile-time constants.
40 */
41#define	PAGE_SHIFT	14
42#define	PAGE_SIZE	(1 << PAGE_SHIFT)
43#define	PAGE_MASK	(PAGE_SIZE - 1)
44
45#define	USRSTACK	VM_MAXUSER_ADDRESS
46
47#ifndef	MAXTSIZ
48#define	MAXTSIZ		(64*1024*1024)		/* max text size */
49#endif
50
51#ifndef	DFLDSIZ
52#define	DFLDSIZ		(128*1024*1024)		/* default data size */
53#endif
54
55#ifndef	MAXDSIZ
56#define	MAXDSIZ		(1*1024*1024*1024)	/* max data size */
57#endif
58
59#ifndef	DFLSSIZ
60#define	DFLSSIZ		(2*1024*1024)		/* default stack size */
61#endif
62
63#ifndef	MAXSSIZ
64#define	MAXSSIZ		(32*1024*1024)		/* max stack size */
65#endif
66
67/*
68 * Size of shared memory map
69 */
70#ifndef	SHMMAXPGS
71#define	SHMMAXPGS	1024
72#endif
73
74/*
75 * Size of User Raw I/O map
76 */
77#define	USRIOSIZE	1024
78
79#if 1
80/*
81 * These definitions give you a 2GB kernel VA space.  The other set matches
82 * the way other PPC ports lay out their 256MB kernel address space.
83 */
84#define	VM_MIN_ADDRESS		((vaddr_t)0)
85#define	VM_MAXUSER_ADDRESS	((vaddr_t)0xffff0000-PAGE_SIZE)
86#define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
87#define	VM_MIN_KERNEL_ADDRESS	((vaddr_t)0x80000000)
88#define	VM_MAX_KERNEL_ADDRESS	((vaddr_t)0xff000000)
89#else
90/*
91 * Would like to have MAX addresses = 0, but this doesn't (currently) work
92 */
93#define	VM_MIN_ADDRESS		((vaddr_t)0)
94#define	VM_MAXUSER_ADDRESS	((vaddr_t)0x80000000-PAGE_SIZE)
95#define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
96#define	VM_MIN_KERNEL_ADDRESS	((vaddr_t)(KERNEL_SR << ADDR_SR_SHFT))
97#define	VM_MAX_KERNEL_ADDRESS	(VM_MIN_KERNEL_ADDRESS + SEGMENT_LENGTH - 1)
98#endif
99
100/* XXX max. amount of KVM to be used by buffers. */
101#ifndef VM_MAX_KERNEL_BUF
102#define VM_MAX_KERNEL_BUF	(0x10000000 * 7 / 10)
103
104/*
105 * Override the default pager_map size, there's not enough KVA.
106 */
107#define PAGER_MAP_SIZE		(4 * 1024 * 1024)
108#endif
109
110#define	VM_PHYS_SIZE		(USRIOSIZE * PAGE_SIZE)
111
112#define	__HAVE_PMAP_PHYSSEG
113
114struct pmap_physseg {
115	struct pv_entry *pvent;
116	char *attrs;
117};
118
119#define VM_PHYSSEG_MAX		16	/* 1? */
120#define VM_PHYSSEG_STRAT	VM_PSTRAT_BSEARCH
121#define VM_PHYSSEG_NOADD		/* can't add RAM after vm_mem_init */
122
123#define	VM_NFREELIST		1
124#define	VM_FREELIST_DEFAULT	0
125
126#endif /* _MACHINE_VMPARAM_H_ */
127