param.h revision 217354 
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: head/sys/mips/include/param.h 217354 2011-01-13 15:17:29Z jchandra $
40 */
41
42#ifndef _MIPS_INCLUDE_PARAM_H_
43#define	_MIPS_INCLUDE_PARAM_H_
44
45#include <machine/_align.h>
46
47#include <sys/cdefs.h>
48#ifdef _KERNEL
49#ifndef _LOCORE
50#include <machine/cpu.h>
51#endif
52#endif
53
54#define __PCI_REROUTE_INTERRUPT
55
56#ifndef MACHINE
57#define	MACHINE		"mips"
58#endif
59#ifndef MACHINE_ARCH
60#if _BYTE_ORDER == _BIG_ENDIAN
61#ifdef __mips_n64
62#define	MACHINE_ARCH	"mips64eb"
63#elif defined(__mips_n32)
64#define	MACHINE_ARCH	"mipsn32eb"
65#else
66#define	MACHINE_ARCH	"mipseb"
67#endif
68#else
69#ifdef __mips_n64
70#define	MACHINE_ARCH	"mips64el"
71#elif defined(__mips_n32)
72#define	MACHINE_ARCH	"mipsn32el"
73#else
74#define	MACHINE_ARCH	"mipsel"
75#endif
76#endif
77#endif
78
79/*
80 * OBJFORMAT_NAMES is a comma-separated list of the object formats
81 * that are supported on the architecture.
82 */
83#define	OBJFORMAT_NAMES		"elf"
84#define	OBJFORMAT_DEFAULT	"elf"
85
86#define	MID_MACHINE	0	/* None but has to be defined */
87
88#ifdef SMP
89#define	MAXSMPCPU	32
90#define	MAXCPU		MAXSMPCPU
91#else
92#define	MAXSMPCPU	1
93#define	MAXCPU		1
94#endif
95
96/*
97 * Round p (pointer or byte index) up to a correctly-aligned value for all
98 * data types (int, long, ...).	  The result is u_int and must be cast to
99 * any desired pointer type.
100 */
101
102#define	ALIGNBYTES	_ALIGNBYTES
103#define	ALIGN(p)	_ALIGN(p)
104/*
105 * ALIGNED_POINTER is a boolean macro that checks whether an address
106 * is valid to fetch data elements of type t from on this architecture.
107 * This does not reflect the optimal alignment, just the possibility
108 * (within reasonable limits).
109 */
110#define	ALIGNED_POINTER(p, t)	((((unsigned long)(p)) & (sizeof (t) - 1)) == 0)
111
112/*
113 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
114 * architecture.  It should be used with appropriate caution.
115 */
116#define	CACHE_LINE_SHIFT	6
117#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
118
119#define	PAGE_SHIFT		12		/* LOG2(PAGE_SIZE) */
120#define	PAGE_SIZE		(1<<PAGE_SHIFT) /* bytes/page */
121#define	PAGE_MASK		(PAGE_SIZE-1)
122
123#define	NPTEPG			(PAGE_SIZE/(sizeof (pt_entry_t)))
124#define	NPDEPG			(PAGE_SIZE/(sizeof (pd_entry_t)))
125
126#if defined(__mips_n32) || defined(__mips_n64) /*  PHYSADDR_64_BIT */
127#define	NPTEPGSHIFT		9               /* LOG2(NPTEPG) */
128#else
129#define	NPTEPGSHIFT		10               /* LOG2(NPTEPG) */
130#endif
131
132#ifdef __mips_n64
133#define	NPDEPGSHIFT		9               /* LOG2(NPTEPG) */
134#define	SEGSHIFT		(PAGE_SHIFT + NPTEPGSHIFT + NPDEPGSHIFT)
135#define	NBSEG			(1ul << SEGSHIFT)
136#define	PDRSHIFT		(PAGE_SHIFT + NPTEPGSHIFT)
137#define	PDRMASK			((1 << PDRSHIFT) - 1)
138#else
139#define	NPDEPGSHIFT		10               /* LOG2(NPTEPG) */
140#define	SEGSHIFT		(PAGE_SHIFT + NPTEPGSHIFT)
141#define	NBSEG			(1 << SEGSHIFT)	/* bytes/segment */
142#define	PDRSHIFT		SEGSHIFT	/* alias for SEG in 32 bit */
143#define	PDRMASK			((1 << PDRSHIFT) - 1)
144#endif
145#define	NBPDR			(1 << PDRSHIFT)	/* bytes/pagedir */
146#define	SEGMASK			(NBSEG - 1)	/* byte offset into segment */
147
148#define	MAXPAGESIZES		1		/* max supported pagesizes */
149
150#define	BLKDEV_IOSIZE		2048		/* xxx: Why is this 1/2 page? */
151#define	MAXDUMPPGS		1		/* xxx: why is this only one? */
152
153/*
154 * The kernel stack needs to be aligned on a (PAGE_SIZE * 2) boundary.
155 */
156#define	KSTACK_PAGES		2	/* kernel stack */
157#define	KSTACK_GUARD_PAGES	2	/* pages of kstack guard; 0 disables */
158
159#define	UPAGES			2
160
161/* pages ("clicks") (4096 bytes) to disk blocks */
162#define	ctod(x)			((x) << (PAGE_SHIFT - DEV_BSHIFT))
163#define	dtoc(x)			((x) >> (PAGE_SHIFT - DEV_BSHIFT))
164
165/*
166 * Map a ``block device block'' to a file system block.
167 * This should be device dependent, and should use the bsize
168 * field from the disk label.
169 * For now though just use DEV_BSIZE.
170 */
171#define	bdbtofsb(bn)		((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
172
173/*
174 * Mach derived conversion macros
175 */
176#define	round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)
177#define	trunc_page(x)		((x) & ~PAGE_MASK)
178
179#define	atop(x)			((x) >> PAGE_SHIFT)
180#define	ptoa(x)			((x) << PAGE_SHIFT)
181
182#define	pgtok(x)		((x) * (PAGE_SIZE / 1024))
183
184#endif /* !_MIPS_INCLUDE_PARAM_H_ */
185