vmparam.h revision 265998 
1/*-
2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 *	$NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $
32 * $FreeBSD: stable/10/sys/powerpc/include/vmparam.h 265998 2014-05-14 01:16:05Z ian $
33 */
34
35#ifndef _MACHINE_VMPARAM_H_
36#define	_MACHINE_VMPARAM_H_
37
38#define	USRSTACK	SHAREDPAGE
39
40#ifndef	MAXTSIZ
41#define	MAXTSIZ		(64*1024*1024)		/* max text size */
42#endif
43
44#ifndef	DFLDSIZ
45#define	DFLDSIZ		(128*1024*1024)		/* default data size */
46#endif
47
48#ifndef	MAXDSIZ
49#define	MAXDSIZ		(1*1024*1024*1024)	/* max data size */
50#endif
51
52#ifndef	DFLSSIZ
53#define	DFLSSIZ		(8*1024*1024)		/* default stack size */
54#endif
55
56#ifndef	MAXSSIZ
57#define	MAXSSIZ		(64*1024*1024)		/* max stack size */
58#endif
59
60#ifdef AIM
61#define	VM_MAXUSER_ADDRESS32	((vm_offset_t)0xfffff000)
62#else
63#define	VM_MAXUSER_ADDRESS32	((vm_offset_t)0x7ffff000)
64#endif
65
66/*
67 * Would like to have MAX addresses = 0, but this doesn't (currently) work
68 */
69#if !defined(LOCORE)
70#ifdef __powerpc64__
71#define	VM_MIN_ADDRESS		(0x0000000000000000UL)
72#define	VM_MAXUSER_ADDRESS	(0xfffffffffffff000UL)
73#define	VM_MAX_ADDRESS		(0xffffffffffffffffUL)
74#else
75#define	VM_MIN_ADDRESS		((vm_offset_t)0)
76#define	VM_MAXUSER_ADDRESS	VM_MAXUSER_ADDRESS32
77#define	VM_MAX_ADDRESS		((vm_offset_t)0xffffffff)
78#endif
79#define	SHAREDPAGE		(VM_MAXUSER_ADDRESS - PAGE_SIZE)
80#else /* LOCORE */
81#if !defined(__powerpc64__) && defined(BOOKE)
82#define	VM_MIN_ADDRESS		0
83#define	VM_MAXUSER_ADDRESS	0x7ffff000
84#endif
85#endif /* LOCORE */
86
87#define	FREEBSD32_SHAREDPAGE	(VM_MAXUSER_ADDRESS32 - PAGE_SIZE)
88#define	FREEBSD32_USRSTACK	FREEBSD32_SHAREDPAGE
89
90#ifdef AIM
91#define	KERNBASE		0x00100000UL	/* start of kernel virtual */
92
93#ifdef __powerpc64__
94#define	VM_MIN_KERNEL_ADDRESS		0xc000000000000000UL
95#define	VM_MAX_KERNEL_ADDRESS		0xc0000001c7ffffffUL
96#define	VM_MAX_SAFE_KERNEL_ADDRESS	VM_MAX_KERNEL_ADDRESS
97#else
98#define	VM_MIN_KERNEL_ADDRESS	((vm_offset_t)KERNEL_SR << ADDR_SR_SHFT)
99#define	VM_MAX_SAFE_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH -1)
100#define	VM_MAX_KERNEL_ADDRESS	(VM_MIN_KERNEL_ADDRESS + 3*SEGMENT_LENGTH - 1)
101#endif
102
103/*
104 * Use the direct-mapped BAT registers for UMA small allocs. This
105 * takes pressure off the small amount of available KVA.
106 */
107#define UMA_MD_SMALL_ALLOC
108
109#else /* Book-E */
110
111#define	KERNBASE		0xc0000000	/* start of kernel virtual */
112
113#define	VM_MIN_KERNEL_ADDRESS	KERNBASE
114#define	VM_MAX_KERNEL_ADDRESS	0xf8000000
115#define	VM_MAX_SAFE_KERNEL_ADDRESS	VM_MAX_KERNEL_ADDRESS
116
117#endif /* AIM/E500 */
118
119#if !defined(LOCORE)
120struct pmap_physseg {
121	struct pv_entry *pvent;
122	char *attrs;
123};
124#endif
125
126#define	VM_PHYSSEG_MAX		16	/* 1? */
127
128/*
129 * The physical address space is densely populated on 32-bit systems,
130 * but may not be on 64-bit ones.
131 */
132#ifdef __powerpc64__
133#define	VM_PHYSSEG_SPARSE
134#else
135#define	VM_PHYSSEG_DENSE
136#endif
137
138/*
139 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
140 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
141 * the pool from which physical pages for small UMA objects are
142 * allocated.
143 */
144#define	VM_NFREEPOOL		3
145#define	VM_FREEPOOL_CACHE	2
146#define	VM_FREEPOOL_DEFAULT	0
147#define	VM_FREEPOOL_DIRECT	1
148
149/*
150 * Create one free page list.
151 */
152#define	VM_NFREELIST		1
153#define	VM_FREELIST_DEFAULT	0
154
155/*
156 * The largest allocation size is 4MB.
157 */
158#define	VM_NFREEORDER		11
159
160/*
161 * Disable superpage reservations.
162 */
163#ifndef	VM_NRESERVLEVEL
164#define	VM_NRESERVLEVEL		0
165#endif
166
167#ifndef VM_INITIAL_PAGEIN
168#define	VM_INITIAL_PAGEIN	16
169#endif
170
171#ifndef SGROWSIZ
172#define	SGROWSIZ	(128UL*1024)		/* amount to grow stack */
173#endif
174
175#ifndef VM_KMEM_SIZE
176#define	VM_KMEM_SIZE		(12 * 1024 * 1024)
177#endif
178
179/*
180 * How many physical pages per KVA page allocated.
181 * min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX)
182 * is the total KVA space allocated for kmem_map.
183 */
184#ifndef VM_KMEM_SIZE_SCALE
185#define VM_KMEM_SIZE_SCALE	(3)
186#endif
187
188/*
189 * Ceiling on the amount of kmem_map KVA space: 40% of the entire KVA space.
190 */
191#ifndef VM_KMEM_SIZE_MAX
192#define VM_KMEM_SIZE_MAX	((VM_MAX_SAFE_KERNEL_ADDRESS - \
193    VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
194#endif
195
196#define	ZERO_REGION_SIZE	(64 * 1024)	/* 64KB */
197
198#endif /* _MACHINE_VMPARAM_H_ */
199