1 /* $OpenBSD: param.h,v 1.11 1998/08/30 22:05:35 millert 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 * 4. 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 * JNPR: param.h,v 1.6.2.1 2007/09/10 07:49:36 girish
39 * $FreeBSD$
40 */
41
42 #ifndef _MACHINE_PARAM_H_
43 #define _MACHINE_PARAM_H_
44
45 #include <sys/cdefs.h>
46 #ifdef _KERNEL
47 #ifndef _LOCORE
48 #include <machine/cpu.h>
49 #endif
50 #endif
51
52 #define __PCI_REROUTE_INTERRUPT
53
54 #ifndef MACHINE
55 #define MACHINE "mips"
56 #endif
57 #ifndef MACHINE_ARCH
58 #define MACHINE_ARCH "mips"
59 #endif
60
61 /*
62 * OBJFORMAT_NAMES is a comma-separated list of the object formats
63 * that are supported on the architecture.
64 */
65 #define OBJFORMAT_NAMES "elf"
66 #define OBJFORMAT_DEFAULT "elf"
67
68 #define MID_MACHINE 0 /* None but has to be defined */
69
70 #ifdef SMP
71 #define MAXSMPCPU 32
72 #define MAXCPU MAXSMPCPU
73 #else
74 #define MAXSMPCPU 1
75 #define MAXCPU 1
76 #endif
77
78 /*
79 * Round p (pointer or byte index) up to a correctly-aligned value for all
80 * data types (int, long, ...). The result is u_long and must be cast to
81 * any desired pointer type.
82 */
83 #define _ALIGNBYTES 7
84 #define _ALIGN(p) (((u_long)(p) + _ALIGNBYTES) &~ _ALIGNBYTES)
85
86 #define ALIGNBYTES _ALIGNBYTES
87 #define ALIGN(p) _ALIGN(p)
88 /*
89 * ALIGNED_POINTER is a boolean macro that checks whether an address
90 * is valid to fetch data elements of type t from on this architecture.
91 * This does not reflect the optimal alignment, just the possibility
92 * (within reasonable limits).
93 */
94 #define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0)
95
96 /*
97 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
98 * architecture. It should be used with appropriate caution.
99 */
100 #define CACHE_LINE_SHIFT 6
101 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT)
102
103 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
104 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
105 #define PAGE_MASK (PAGE_SIZE-1)
106
107 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
108 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
109
110 #if defined(__mips_n64)
111 #define SEGSHIFT 31 /* LOG2(NBSEG) */
112 #define NBSEG (1ul << SEGSHIFT) /* bytes/segment */
113 #define PDRSHIFT 22 /* second level */
114 #define PDRMASK ((1 << PDRSHIFT) - 1)
115 #else
116 #define SEGSHIFT 22 /* LOG2(NBSEG) */
117 #define NBSEG (1 << SEGSHIFT) /* bytes/segment */
118 #define PDRSHIFT SEGSHIFT /* alias for SEG in 32 bit */
119 #define PDRMASK ((1 << PDRSHIFT) - 1)
120 #endif
121 #define NBPDR (1 << PDRSHIFT) /* bytes/pagedir */
122 #define SEGMASK (NBSEG-1) /* byte offset into segment */
123
124 #define MAXPAGESIZES 1 /* maximum number of supported page sizes */
125
126 #define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */
127 #define MAXDUMPPGS 1 /* xxx: why is this only one? */
128
129 /*
130 * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary.
131 */
132 #define KSTACK_PAGES 2 /* kernel stack */
133 #define KSTACK_GUARD_PAGES 2 /* pages of kstack guard; 0 disables */
134
135 #define UPAGES 2
136
137 /* pages ("clicks") (4096 bytes) to disk blocks */
138 #define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT))
139 #define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT))
140
141 /*
142 * Map a ``block device block'' to a file system block.
143 * This should be device dependent, and should use the bsize
144 * field from the disk label.
145 * For now though just use DEV_BSIZE.
146 */
147 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
148
149 /*
150 * Mach derived conversion macros
151 */
152 #define round_page(x) (((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
153 #define trunc_page(x) ((unsigned long)(x) & ~PAGE_MASK)
154
155 #define atop(x) ((unsigned long)(x) >> PAGE_SHIFT)
156 #define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT)
157
158 #define mips_btop(x) ((unsigned long)(x) >> PAGE_SHIFT)
159 #define mips_ptob(x) ((unsigned long)(x) << PAGE_SHIFT)
160
161 #define pgtok(x) ((unsigned long)(x) * (PAGE_SIZE / 1024))
162
163 #ifndef _KERNEL
164 #define DELAY(n) { register int N = (n); while (--N > 0); }
165 #endif /* !_KERNEL */
166
167 #endif /* !_MACHINE_PARAM_H_ */
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