1 /* $OpenBSD: param.h,v 1.11 1998/08/30 22:05:35 millert Exp $ */
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
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.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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
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
42 #ifndef _MIPS_INCLUDE_PARAM_H_
43 #define _MIPS_INCLUDE_PARAM_H_
45 #include <machine/_align.h>
47 #include <sys/cdefs.h>
50 #include <machine/cpu.h>
54 #define __PCI_REROUTE_INTERRUPT
57 #define MACHINE "mips"
60 #if _BYTE_ORDER == _BIG_ENDIAN
62 #define MACHINE_ARCH "mips64eb"
63 #elif defined(__mips_n32)
64 #define MACHINE_ARCH "mipsn32eb"
66 #define MACHINE_ARCH "mipseb"
70 #define MACHINE_ARCH "mips64el"
71 #elif defined(__mips_n32)
72 #define MACHINE_ARCH "mipsn32el"
74 #define MACHINE_ARCH "mipsel"
80 * OBJFORMAT_NAMES is a comma-separated list of the object formats
81 * that are supported on the architecture.
83 #define OBJFORMAT_NAMES "elf"
84 #define OBJFORMAT_DEFAULT "elf"
86 #define MID_MACHINE 0 /* None but has to be defined */
91 #define MAXCPU MAXSMPCPU
99 * Round p (pointer or byte index) up to a correctly-aligned value for all
100 * data types (int, long, ...). The result is u_int and must be cast to
101 * any desired pointer type.
104 #define ALIGNBYTES _ALIGNBYTES
105 #define ALIGN(p) _ALIGN(p)
107 * ALIGNED_POINTER is a boolean macro that checks whether an address
108 * is valid to fetch data elements of type t from on this architecture.
109 * This does not reflect the optimal alignment, just the possibility
110 * (within reasonable limits).
112 #define ALIGNED_POINTER(p, t) ((((unsigned long)(p)) & (sizeof (t) - 1)) == 0)
115 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
116 * architecture. It should be used with appropriate caution.
118 #define CACHE_LINE_SHIFT 6
119 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT)
121 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
122 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
123 #define PAGE_MASK (PAGE_SIZE-1)
125 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
126 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
128 #if defined(__mips_n32) || defined(__mips_n64) /* PHYSADDR_64_BIT */
129 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */
131 #define NPTEPGSHIFT 10 /* LOG2(NPTEPG) */
135 #define NPDEPGSHIFT 9 /* LOG2(NPTEPG) */
136 #define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT + NPDEPGSHIFT)
137 #define NBSEG (1ul << SEGSHIFT)
138 #define PDRSHIFT (PAGE_SHIFT + NPTEPGSHIFT)
139 #define PDRMASK ((1 << PDRSHIFT) - 1)
141 #define NPDEPGSHIFT 10 /* LOG2(NPTEPG) */
142 #define SEGSHIFT (PAGE_SHIFT + NPTEPGSHIFT)
143 #define NBSEG (1 << SEGSHIFT) /* bytes/segment */
144 #define PDRSHIFT SEGSHIFT /* alias for SEG in 32 bit */
145 #define PDRMASK ((1 << PDRSHIFT) - 1)
147 #define NBPDR (1 << PDRSHIFT) /* bytes/pagedir */
148 #define SEGMASK (NBSEG - 1) /* byte offset into segment */
150 #define MAXPAGESIZES 1 /* max supported pagesizes */
152 #define BLKDEV_IOSIZE 2048 /* xxx: Why is this 1/2 page? */
153 #define MAXDUMPPGS 1 /* xxx: why is this only one? */
156 * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary.
158 #define KSTACK_PAGES 2 /* kernel stack */
159 #define KSTACK_GUARD_PAGES 2 /* pages of kstack guard; 0 disables */
163 /* pages ("clicks") (4096 bytes) to disk blocks */
164 #define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT))
165 #define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT))
168 * Map a ``block device block'' to a file system block.
169 * This should be device dependent, and should use the bsize
170 * field from the disk label.
171 * For now though just use DEV_BSIZE.
173 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
176 * Mach derived conversion macros
178 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
179 #define trunc_page(x) ((x) & ~PAGE_MASK)
181 #define atop(x) ((x) >> PAGE_SHIFT)
182 #define ptoa(x) ((x) << PAGE_SHIFT)
184 #define pgtok(x) ((x) * (PAGE_SIZE / 1024))
186 #endif /* !_MIPS_INCLUDE_PARAM_H_ */