Annotation of sys/arch/vax/include/param.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: param.h,v 1.33 2007/05/28 21:02:49 thib Exp $ */
2: /* $NetBSD: param.h,v 1.39 1999/10/22 21:14:34 ragge Exp $ */
3: /*-
4: * Copyright (c) 1990 The Regents of the University of California.
5: * All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley by
8: * William Jolitz.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. Neither the name of the University nor the names of its contributors
19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
33: *
34: * @(#)param.h 5.8 (Berkeley) 6/28/91
35: */
36:
37: #ifndef _VAX_PARAM_H_
38: #define _VAX_PARAM_H_
39:
40: /*
41: * Machine dependent constants for VAX.
42: */
43:
44: #define _MACHINE vax
45: #define MACHINE "vax"
46: #define _MACHINE_ARCH vax
47: #define MACHINE_ARCH "vax"
48: #define MID_MACHINE MID_VAX
49:
50: /*
51: * Round p (pointer or byte index) up to a correctly-aligned value
52: * for all data types (int, long, ...). The result is u_int and
53: * must be cast to any desired pointer type.
54: *
55: * ALIGNED_POINTER is a boolean macro that checks whether an address
56: * is valid to fetch data elements of type t from on this architecture.
57: * This does not reflect the optimal alignment, just the possibility
58: * (within reasonable limits).
59: *
60: */
61:
62: #define ALIGNBYTES (sizeof(int) - 1)
63: #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
64: #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
65:
66: #define PGSHIFT 12 /* LOG2(NBPG) */
67: #define NBPG (1 << PGSHIFT) /* (1 << PGSHIFT) bytes/page */
68: #define PGOFSET (NBPG - 1) /* byte offset into page */
69:
70: #define PAGE_SHIFT 12
71: #define PAGE_SIZE (1 << PAGE_SHIFT)
72: #define PAGE_MASK (PAGE_SIZE - 1)
73:
74: #define VAX_PGSHIFT 9
75: #define VAX_NBPG (1 << VAX_PGSHIFT)
76: #define VAX_PGOFSET (VAX_NBPG - 1)
77: #define VAX_NPTEPG (VAX_NBPG / 4)
78:
79: #define KERNBASE 0x80000000 /* start of kernel virtual */
80:
81: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
82: #define DEV_BSIZE (1 << DEV_BSHIFT)
83:
84: #define BLKDEV_IOSIZE 2048
85: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
86: #define MAXBSIZE 0x4000 /* max FS block size - XXX */
87:
88: #define UPAGES 2 /* pages of u-area */
89: #define USPACE (NBPG*UPAGES)
90: #define USPACE_ALIGN (0) /* u-area alignment 0-none */
91: #define REDZONEADDR (VAX_NBPG*3) /* Must be > sizeof(struct user) */
92:
93: #ifndef MSGBUFSIZE
94: #define MSGBUFSIZE 8192 /* default message buffer size */
95: #endif
96:
97: /*
98: * Constants related to network buffer management.
99: */
100: #define NMBCLUSTERS 768 /* map size, max cluster allocation */
101:
102: /*
103: * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
104: * logical pages.
105: */
106: #define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
107: #define NKMEMPAGES_MAX_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
108:
109: /*
110: * Some macros for units conversion
111: */
112:
113: /* pages ("clicks") to disk blocks */
114: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
115: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
116:
117: /* clicks to bytes */
118: #define ctob(x) ((x) << PGSHIFT)
119: #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT)
120:
121: /* bytes to disk blocks */
122: #define btodb(x) ((x) >> DEV_BSHIFT)
123: #define dbtob(x) ((x) << DEV_BSHIFT)
124:
125: /* MD conversion macros */
126: #define vax_btoc(x) (((unsigned)(x) + VAX_PGOFSET) >> VAX_PGSHIFT)
127: #define vax_btop(x) (((unsigned)(x)) >> VAX_PGSHIFT)
128:
129: #define ovbcopy(x,y,z) bcopy(x, y, z)
130:
131: #ifdef _KERNEL
132:
133: #include <machine/intr.h>
134:
135: /* Prototype needed for delay() */
136: #ifndef _LOCORE
137: #include <machine/cpu.h>
138:
139: void delay(int);
140: /* inline macros used inside kernel */
141: #include <machine/macros.h>
142: #endif
143:
144: #define DELAY(x) delay(x)
145: #endif /* _KERNEL */
146:
147: #endif /* _VAX_PARAM_H_ */
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