1/*	$OpenBSD: param.h,v 1.14 2023/12/14 13:26:49 claudio Exp $	*/
2
3/*-
4 * Copyright (c) 2002 The NetBSD Foundation, Inc. All rights reserved.
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifndef	_SH_PARAM_H_
37#define	_SH_PARAM_H_
38
39#define	_MACHINE_ARCH	sh
40#define	MACHINE_ARCH	"sh"
41
42#ifndef	MID_MACHINE
43#define	MID_MACHINE	MID_SH3
44#endif
45
46#if defined(_KERNEL) && !defined(_LOCORE)
47#include <sh/cpu.h>
48#endif
49
50/*
51 * We use 4K pages on the sh3/sh4.  Override the PAGE_* definitions
52 * to be compile-time constants.
53 */
54#define	PAGE_SHIFT		12
55#define	PAGE_SIZE		(1 << PAGE_SHIFT)
56#define	PAGE_MASK		(PAGE_SIZE - 1)
57
58#ifdef _KERNEL
59
60#define	NBPG			PAGE_SIZE
61#define	PGSHIFT			PAGE_SHIFT
62#define	PGOFSET			PAGE_MASK
63
64#endif
65
66/*
67 * u-space.
68 */
69#define	UPAGES		3			/* pages of u-area */
70#define	USPACE		(UPAGES * PAGE_SIZE)	/* total size of u-area */
71#define	USPACE_ALIGN	(0)
72
73#if UPAGES == 1
74#error "too small u-area"
75#elif UPAGES == 2
76#define	P1_STACK	/* kernel stack is P1-area */
77#else
78#undef	P1_STACK	/* kernel stack is P3-area */
79#endif
80
81#ifdef _KERNEL
82
83#define	NMBCLUSTERS	(8 * 1024)		/* max cluster allocation */
84
85#ifndef MSGBUFSIZE
86#define	MSGBUFSIZE	PAGE_SIZE		/* default message buffer size */
87#endif
88
89#endif /* _KERNEL */
90
91#endif /* _SH_PARAM_H_ */
92