param.h revision 1.10 
1/*	$NetBSD: param.h,v 1.10 2007/12/31 13:38:50 ad Exp $	*/
2
3/*	$OpenBSD: param.h,v 1.12 2001/07/06 02:07:41 provos Exp $	*/
4
5/*
6 * Copyright (c) 1988-1994, The University of Utah and
7 * the Computer Systems Laboratory at the University of Utah (CSL).
8 * All rights reserved.
9 *
10 * Permission to use, copy, modify and distribute this software is hereby
11 * granted provided that (1) source code retains these copyright, permission,
12 * and disclaimer notices, and (2) redistributions including binaries
13 * reproduce the notices in supporting documentation, and (3) all advertising
14 * materials mentioning features or use of this software display the following
15 * acknowledgement: ``This product includes software developed by the
16 * Computer Systems Laboratory at the University of Utah.''
17 *
18 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
19 * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
20 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
21 *
22 * CSL requests users of this software to return to csl-dist@cs.utah.edu any
23 * improvements that they make and grant CSL redistribution rights.
24 *
25 * 	Utah $Hdr: param.h 1.18 94/12/16$
26 */
27
28#include <sys/featuretest.h>
29
30#if defined(_NETBSD_SOURCE)
31#include <machine/cpu.h>
32#endif
33
34/*
35 * Machine dependent constants for PA-RISC.
36 */
37
38#define	_MACHINE_ARCH	hppa
39#define	MACHINE_ARCH	"hppa"
40#define	MID_MACHINE	MID_HPUX800
41
42/*
43 * Round p (pointer or byte index) up to a correctly-aligned value for all
44 * data types (int, long, ...).   The result is u_int and must be cast to
45 * any desired pointer type.
46 */
47#define	ALIGNBYTES	7
48#define	ALIGN(p)	(((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
49#define	ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
50
51#define	PGSHIFT		12		/* LOG2(NBPG) */
52#define	NBPG		(1 << PGSHIFT)	/* bytes/page */
53#define	PGOFSET		(NBPG-1)	/* byte offset into page */
54
55#define	SEGSHIFT	(PGSHIFT + (PGSHIFT-PTESHIFT))	/* LOG2(NBSEG) */
56#define NBSEG		(1 << SEGSHIFT)	/* bytes/segment (quadrant) */
57#define	SEGOFSET	(NBSEG-1)	/* byte offset into segment */
58
59#define	KERNBASE	0x00000000	/* start of kernel virtual */
60#define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
61
62#define	DEV_BSIZE	512
63#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
64#define BLKDEV_IOSIZE	2048
65#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
66
67#define	SSIZE		(1)		/* initial stack size/NBPG */
68#define	SINCR		(1)		/* increment of stack/NBPG */
69
70#define	USHIFT		(3)		/* log2(UPAGES) */
71#define	UPAGES		(1<<USHIFT)	/* pages of u-area */
72#define	USPACE		(UPAGES * NBPG)	/* pages for user struct and kstack */
73
74#ifndef	MSGBUFSIZE
75#define	MSGBUFSIZE	2*NBPG		/* default message buffer size */
76#endif
77
78/*
79 * Constants related to network buffer management.
80 * MCLBYTES must be no larger than the software page size, and,
81 * on machines that exchange pages of input or output buffers with mbuf
82 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
83 * of the hardware page size.
84 */
85#define	MSIZE		256		/* size of an mbuf */
86#define	MCLSHIFT	11
87#define	MCLBYTES	(1 << MCLSHIFT)	/* large enough for ether MTU */
88#define	MCLOFSET	(MCLBYTES - 1)
89#ifndef NMBCLUSTERS
90#define	NMBCLUSTERS	(2048)		/* cl map size: 1MB */
91#endif
92
93/*
94 * Size of kernel malloc arena in logical pages
95 */
96#define NKMEMPAGES_MIN_DEFAULT  ((16 * 1024 * 1024) >> PAGE_SHIFT)
97#define NKMEMPAGES_MAX_DEFAULT  ((16 * 1024 * 1024) >> PAGE_SHIFT)
98
99/*
100 * Mach derived conversion macros
101 */
102
103#define btop(x)		((unsigned long)(x) >> PGSHIFT)
104#define ptob(x)		((unsigned long)(x) << PGSHIFT)
105
106#endif
107