param.h revision 195376 
1/* $FreeBSD: head/sys/ia64/include/param.h 195376 2009-07-05 17:45:48Z sam $ */
2/* From: NetBSD: param.h,v 1.20 1997/09/19 13:52:53 leo Exp */
3
4/*-
5 * Copyright (c) 1988 University of Utah.
6 * Copyright (c) 1992, 1993
7 *	The Regents of the University of California.  All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * the Systems Programming Group of the University of Utah Computer
11 * Science Department and Ralph Campbell.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: Utah $Hdr: machparam.h 1.11 89/08/14$
38 *
39 *	@(#)param.h	8.1 (Berkeley) 6/10/93
40 */
41
42/*
43 * Machine dependent constants for the IA64.
44 */
45/*
46 * Round p (pointer or byte index) up to a correctly-aligned value for all
47 * data types (int, long, ...).   The result is u_long and must be cast to
48 * any desired pointer type.
49 */
50#ifndef _ALIGNBYTES
51#define	_ALIGNBYTES		15
52#endif
53#ifndef _ALIGN
54#define	_ALIGN(p)		(((u_long)(p) + _ALIGNBYTES) &~ _ALIGNBYTES)
55#endif
56
57#ifndef _NO_NAMESPACE_POLLUTION
58
59#define __HAVE_ACPI
60#define __PCI_REROUTE_INTERRUPT
61
62#ifndef _MACHINE_PARAM_H_
63#define	_MACHINE_PARAM_H_
64
65#ifndef MACHINE
66#define	MACHINE		"ia64"
67#endif
68#ifndef MACHINE_ARCH
69#define	MACHINE_ARCH	"ia64"
70#endif
71
72#if defined(SMP) || defined(KLD_MODULE)
73#define	MAXCPU		4
74#else
75#define MAXCPU		1
76#endif
77
78#define	ALIGNBYTES		_ALIGNBYTES
79#define	ALIGN(p)		_ALIGN(p)
80/*
81 * ALIGNED_POINTER is a boolean macro that checks whether an address
82 * is valid to fetch data elements of type t from on this architecture.
83 * This does not reflect the optimal alignment, just the possibility
84 * (within reasonable limits).
85 */
86#define	ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
87
88/*
89 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an
90 * architecture.  It should be used with appropriate caution.
91 */
92#define	CACHE_LINE_SHIFT	7
93#define	CACHE_LINE_SIZE		(1 << CACHE_LINE_SHIFT)
94
95#ifndef LOG2_PAGE_SIZE
96#define	LOG2_PAGE_SIZE		13		/* 8K pages by default. */
97#endif
98#define	PAGE_SHIFT	(LOG2_PAGE_SIZE)
99#define	PAGE_SIZE	(1<<(LOG2_PAGE_SIZE))
100#define PAGE_MASK	(PAGE_SIZE-1)
101#define NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
102
103#ifndef	KSTACK_PAGES
104#define	KSTACK_PAGES	4		/* pages of kernel stack */
105#endif
106#define	KSTACK_GUARD_PAGES 0		/* pages of kstack guard; 0 disables */
107
108/*
109 * Mach derived conversion macros
110 */
111#define	round_page(x)	((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK))
112#define	trunc_page(x)	((unsigned long)(x) & ~(PAGE_MASK))
113
114#define atop(x)			((unsigned long)(x) >> PAGE_SHIFT)
115#define ptoa(x)			((unsigned long)(x) << PAGE_SHIFT)
116
117#define	ia64_btop(x)		((unsigned long)(x) >> PAGE_SHIFT)
118#define	ia64_ptob(x)		((unsigned long)(x) << PAGE_SHIFT)
119
120#define pgtok(x)                ((x) * (PAGE_SIZE / 1024))
121
122#endif	/* !_MACHINE_PARAM_H_ */
123#endif	/* !_NO_NAMESPACE_POLLUTION */
124