Annotation of sys/arch/m88k/include/param.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: param.h,v 1.10 2007/05/28 21:02:49 thib Exp $ */
2: /*
3: * Copyright (c) 1999 Steve Murphree, Jr.
4: * Copyright (c) 1988 University of Utah.
5: * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
6: * 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.
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: *
38: * @(#)param.h 7.8 (Berkeley) 6/28/91
39: */
40: #ifndef _M88K_PARAM_H_
41: #define _M88K_PARAM_H_
42:
43: #ifdef _KERNEL
44: #ifndef _LOCORE
45: #include <machine/cpu.h>
46: #endif /* _LOCORE */
47: #endif
48:
49: #define _MACHINE_ARCH m88k
50: #define MACHINE_ARCH "m88k"
51: #define MID_MACHINE MID_M88K
52:
53: /*
54: * Round p (pointer or byte index) down to a correctly-aligned value
55: * for all data types (int, long, ...). The result is u_int and
56: * must be cast to any desired pointer type. ALIGN() is used for
57: * aligning stack, which needs to be on a double word boundary for
58: * 88k.
59: */
60:
61: #define ALIGNBYTES 15 /* 64 bit alignment */
62: #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
63: #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
64:
65: #define NBPG (1 << PGSHIFT) /* bytes/page */
66: #define PGOFSET (NBPG-1) /* byte offset into page */
67: #define PGSHIFT 12 /* LOG2(NBPG) */
68:
69: #define PAGE_SHIFT 12
70: #define PAGE_SIZE (1 << PAGE_SHIFT)
71: #define PAGE_MASK (PAGE_SIZE - 1)
72:
73: #define NPTEPG (PAGE_SIZE / (sizeof(pt_entry_t)))
74:
75: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
76: #define DEV_BSIZE (1 << DEV_BSHIFT)
77: #define BLKDEV_IOSIZE 2048
78: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
79:
80: #define UPAGES 2 /* pages of u-area */
81: #define USPACE (UPAGES * NBPG)
82: #define USPACE_ALIGN (0) /* u-area alignment 0-none */
83:
84: /*
85: * Constants related to network buffer management.
86: */
87: #define NMBCLUSTERS 2048 /* map size, max cluster allocation */
88:
89: /*
90: * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
91: * logical pages.
92: */
93: #define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
94: #define NKMEMPAGES_MAX_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT)
95:
96: #define MSGBUFSIZE PAGE_SIZE
97:
98: /* pages ("clicks") to disk blocks */
99: #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
100: #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
101:
102: /* pages to bytes */
103: #define ctob(x) ((x) << PGSHIFT)
104: #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
105:
106: /* bytes to disk blocks */
107: #define btodb(x) ((x) >> DEV_BSHIFT)
108: #define dbtob(x) ((x) << DEV_BSHIFT)
109:
110: /*
111: * Get interrupt glue.
112: */
113: #include <machine/intr.h>
114:
115: #ifdef _KERNEL
116:
117: #define DELAY(x) delay(x)
118:
119: #if !defined(_LOCORE)
120: extern void delay(int);
121: extern int cputyp;
122: #endif
123:
124: /*
125: * Values for the cputyp variable.
126: */
127: #define CPU_88100 0x100
128: #define CPU_88110 0x110
129:
130: #ifdef M88100
131: #ifdef M88110
132: #define CPU_IS88100 (cputyp == CPU_88100)
133: #define CPU_IS88110 (cputyp != CPU_88100)
134: #else
135: #define CPU_IS88100 1
136: #define CPU_IS88110 0
137: #endif
138: #else
139: #define CPU_IS88100 0
140: #define CPU_IS88110 1
141: #endif
142:
143: #endif /* _KERNEL */
144: #endif /* !_M88K_PARAM_H_ */
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