Annotation of sys/arch/mips64/include/param.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: param.h,v 1.17 2007/05/28 21:02:49 thib Exp $ */
2:
3: /*
4: * Copyright (c) 1988 University of Utah.
5: * Copyright (c) 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * the Systems Programming Group of the University of Utah Computer
10: * Science Department and Ralph Campbell.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: *
36: * from: Utah Hdr: machparam.h 1.11 89/08/14
37: * from: @(#)param.h 8.1 (Berkeley) 6/10/93
38: */
39:
40: #ifndef _MIPS_PARAM_H_
41: #define _MIPS_PARAM_H_
42:
43: #ifdef _KERNEL
44: #ifdef _LOCORE
45: #include <machine/psl.h>
46: #else
47: #include <machine/cpu.h>
48: #endif
49: #endif
50:
51: /*
52: * Round p (pointer or byte index) up to a correctly-aligned value for all
53: * data types (int, long, ...). The result is u_int and must be cast to
54: * any desired pointer type.
55: */
56: #define ALIGNBYTES 7
57: #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
58: #define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof (t) - 1)) == 0)
59:
60: #define NBPG 4096 /* bytes/page */
61: #define PGOFSET (NBPG-1) /* byte offset into page */
62: #define PGSHIFT 12 /* LOG2(NBPG) */
63:
64: #define PAGE_SHIFT 12
65: #define PAGE_SIZE (1 << PAGE_SHIFT)
66: #define PAGE_MASK (PAGE_SIZE - 1)
67:
68: #define NPTEPG (NBPG/4)
69:
70: #define NBSEG 0x400000 /* bytes/segment */
71: #define SEGOFSET (NBSEG-1) /* byte offset into segment */
72: #define SEGSHIFT 22 /* LOG2(NBSEG) */
73:
74: #ifdef __LP64__
75: #define KERNBASE 0xffffffff80000000L /* start of kernel virtual */
76: #else
77: #define KERNBASE 0x80000000 /* start of kernel virtual */
78: #endif
79:
80: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
81: #define DEV_BSIZE (1 << DEV_BSHIFT)
82: #define BLKDEV_IOSIZE 2048
83: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
84:
85: #ifdef __LP64__
86: #define UPAGES 4 /* pages of u-area */
87: #else
88: #define UPAGES 2 /* pages of u-area */
89: #endif
90:
91: #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */
92: #define USPACE_ALIGN (2*NBPG) /* u-area alignment 0-none */
93:
94: /*
95: * Constants related to network buffer management.
96: */
97: #define NMBCLUSTERS 4096 /* map size, max cluster allocation */
98:
99: #define MSGBUFSIZE 8192
100:
101: /* Default malloc arena size */
102: #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
103: #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
104:
105: /* pages ("clicks") (4096 bytes) to disk blocks */
106: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
107: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
108:
109: /* pages to bytes */
110: #define ctob(x) ((x) << PGSHIFT)
111: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
112:
113: /* bytes to disk blocks */
114: #define btodb(x) ((x) >> DEV_BSHIFT)
115: #define dbtob(x) ((x) << DEV_BSHIFT)
116:
117: #ifdef _KERNEL
118: #ifndef _LOCORE
119:
120: #define DELAY(n) delay(n)
121: void delay(int);
122: void nanodelay(int);
123: #endif
124: #endif /* !_KERNEL */
125:
126: #endif /* !_MIPS_PARAM_H_ */
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