param.h revision 1.1 
1/* $NetBSD: param.h,v 1.1 2014/09/03 19:34:26 matt Exp $ */
2
3/*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef	_OR1K_PARAM_H_
33#define	_OR1K_PARAM_H_
34
35/*
36 * Machine dependent constants for all OpenRISC processors
37 */
38
39/*
40 * For KERNEL code:
41 *	MACHINE must be defined by the individual port.  This is so that
42 *	uname returns the correct thing, etc.
43 *
44 * For non-KERNEL code:
45 *	If ELF, MACHINE and MACHINE_ARCH are forced to "or1k/or1k".
46 */
47
48#define	_MACHINE_ARCH	or1k
49#define	MACHINE_ARCH	"or1k"
50#define	_MACHINE	or1k
51#define	MACHINE		"or1k"
52
53#define	MID_MACHINE	MID_OR1K
54
55/* OR1K-specific macro to align a stack pointer (downwards). */
56#define STACK_ALIGNBYTES	(__BIGGEST_ALIGNMENT__ - 1)
57#define	ALIGNBYTES32	__BIGGEST_ALIGNMENT__
58
59#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
60#define	DEV_BSIZE	(1 << DEV_BSHIFT)
61#define	BLKDEV_IOSIZE	2048
62
63#ifndef MAXPHYS
64#define	MAXPHYS		65536		/* max I/O transfer size */
65#endif
66
67#define NKMEMPAGES_MAX_DEFAULT	(2048UL * 1024 * 1024)
68#define NKMEMPAGES_MIN_DEFAULT	(128UL * 1024 * 1024)
69
70#define PGSHIFT		13
71#define	NBPG		(1 << PGSHIFT)
72#define PGOFSET		(NBPG - 1)
73
74/*
75 * Constants related to network buffer management.
76 * MCLBYTES must be no larger than NBPG (the software page size), and
77 * NBPG % MCLBYTES must be zero.
78 */
79#define	MSIZE		512		/* size of an mbuf */
80
81#ifndef MCLSHIFT
82#define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
83					/* 2K cluster can hold Ether frame */
84#endif	/* MCLSHIFT */
85
86#define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
87
88#ifdef _KERNEL
89void delay(unsigned long);
90#define	DELAY(x)	delay(x)
91#endif
92
93#endif /* _OR1K_PARAM_H_ */
94