param.h revision 224207 
1/*-
2 * Copyright (c) 2001 David E. O'Brien
3 * Copyright (c) 1990 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * William Jolitz.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
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: @(#)param.h	5.8 (Berkeley) 6/28/91
38 * $FreeBSD: head/sys/powerpc/include/param.h 224207 2011-07-19 00:37:24Z attilio $
39 */
40
41#ifndef _POWERPC_INCLUDE_PARAM_H_
42#define	_POWERPC_INCLUDE_PARAM_H_
43
44/*
45 * Machine dependent constants for PowerPC
46 */
47
48#include <machine/_align.h>
49
50/* Needed to display interrupts on OFW PCI */
51#define __PCI_REROUTE_INTERRUPT
52
53#ifndef MACHINE
54#define	MACHINE		"powerpc"
55#endif
56#ifndef MACHINE_ARCH
57#ifdef __powerpc64__
58#define	MACHINE_ARCH	"powerpc64"
59#else
60#define	MACHINE_ARCH	"powerpc"
61#endif
62#endif
63#define	MID_MACHINE	MID_POWERPC
64#ifdef __powerpc64__
65#ifndef	MACHINE_ARCH32
66#define	MACHINE_ARCH32	"powerpc"
67#endif
68#endif
69
70#if defined(SMP) || defined(KLD_MODULE)
71#ifndef MAXCPU
72#define	MAXCPU		8
73#endif
74#else
75#define	MAXCPU		1
76#endif /* SMP || KLD_MODULE */
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)	((((uintptr_t)(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#define	PAGE_SHIFT	12
96#define	PAGE_SIZE	(1L << PAGE_SHIFT)	/* Page size */
97#define	PAGE_MASK	(vm_offset_t)(PAGE_SIZE - 1)
98#define	NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
99
100#define	MAXPAGESIZES	1		/* maximum number of supported page sizes */
101
102#ifndef KSTACK_PAGES
103#define	KSTACK_PAGES		4		/* includes pcb */
104#endif
105#define	KSTACK_GUARD_PAGES	1	/* pages of kstack guard; 0 disables */
106#define	USPACE		(KSTACK_PAGES * PAGE_SIZE)	/* total size of pcb */
107
108/*
109 * Mach derived conversion macros
110 */
111#define	trunc_page(x)		((unsigned long)(x) & ~(PAGE_MASK))
112#define	round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)
113
114#define	atop(x)			((unsigned long)(x) >> PAGE_SHIFT)
115#define	ptoa(x)			((unsigned long)(x) << PAGE_SHIFT)
116
117#define	powerpc_btop(x)		((unsigned long)(x) >> PAGE_SHIFT)
118#define	powerpc_ptob(x)		((unsigned long)(x) << PAGE_SHIFT)
119
120#define	pgtok(x)		((x) * (PAGE_SIZE / 1024UL))
121
122#endif /* !_POWERPC_INCLUDE_PARAM_H_ */
123