1/*	$NetBSD$	*/
2
3/*-
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#ifndef _POWERPC_PARAM_H
35#define	_POWERPC_PARAM_H
36
37#ifdef	_KERNEL
38#if defined(_KERNEL_OPT)
39#include "opt_ppcarch.h"
40#endif
41#endif
42
43/*
44 * Machine dependent constants for PowerPC (32-bit only currently)
45 * For userland regardless of port, force MACHINE to be "powerpc"
46 */
47#ifndef _KERNEL
48#undef MACHINE
49#endif
50#ifndef MACHINE
51#define	MACHINE		"powerpc"
52#endif
53#define	MACHINE_ARCH	"powerpc"
54#define	MID_MACHINE	MID_POWERPC
55
56/* PowerPC-specific macro to align a stack pointer (downwards). */
57#define	STACK_ALIGNBYTES	(16 - 1)	/* AltiVec */
58
59#ifdef PPC_IBM4XX
60#define	PGSHIFT		14	/* Use 16KB to reduce TLB thrashing */
61#define	UPAGES		1
62#else
63#define	PGSHIFT		12
64#define	UPAGES		4
65#endif
66#define	NBPG		(1 << PGSHIFT)	/* Page size */
67#define	PGOFSET		(NBPG - 1)
68
69#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
70#define	DEV_BSIZE	(1 << DEV_BSHIFT)
71#define	BLKDEV_IOSIZE	NBPG
72#ifndef MAXPHYS
73#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
74#endif
75
76#define	USPACE		(UPAGES * NBPG)
77
78#ifndef	MSGBUFSIZE
79#define	MSGBUFSIZE	(2*NBPG)	/* default message buffer size */
80#endif
81
82#ifndef KERNBASE
83#define	KERNBASE	0x100000
84#endif
85
86/*
87 * Constants related to network buffer management.
88 * MCLBYTES must be no larger than NBPG (the software page size), and,
89 * on machines that exchange pages of input or output buffers with mbuf
90 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
91 * of the hardware page size.
92 */
93#ifndef MSIZE
94#ifdef _LP64
95#define	MSIZE		512		/* size of an mbuf */
96#else  /* _LP64 */
97#define	MSIZE		256		/* size of an mbuf */
98#endif /* _LP64 */
99#endif
100#ifndef MCLSHIFT
101#define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
102#endif
103#define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
104
105/*
106 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
107 * logical pages.
108 */
109#ifndef NKMEMPAGES_MIN_DEFAULT
110#define	NKMEMPAGES_MIN_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
111#endif
112#ifndef NKMEMPAGES_MAX_DEFAULT
113#define	NKMEMPAGES_MAX_DEFAULT	((256 * 1024 * 1024) >> PAGE_SHIFT)
114#endif
115
116#if defined(_KERNEL) && !defined(_LOCORE)
117#include <machine/cpu.h>
118#endif	/* _KERNEL && !_LOCORE */
119
120#endif /* _POWERPC_PARAM_H_ */
121