1/* $NetBSD: param.h,v 1.76 2025/04/20 22:33:41 riastradh Exp $ */
2
3/*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)param.h 8.1 (Berkeley) 6/11/93
41 */
42/*
43 * Sun4M support by Aaron Brown, Harvard University.
44 * Changes Copyright (c) 1995 The President and Fellows of Harvard College.
45 * All rights reserved.
46 */
47#define _MACHINE sparc
48#define MACHINE "sparc"
49#define _MACHINE_ARCH sparc
50#define MACHINE_ARCH "sparc"
51#define MID_MACHINE MID_SPARC
52
53#include <machine/cpuconf.h> /* XXX */
54#ifdef _KERNEL /* XXX */
55#ifndef _LOCORE /* XXX */
56#include <machine/cpu.h> /* XXX */
57#endif /* XXX */
58#endif /* XXX */
59
60#define SUN4_PGSHIFT 13 /* for a sun4 machine */
61#define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */
62
63#define STACK_ALIGNBYTES (8 - 1)
64
65/*
66 * The following variables are always defined and initialized (in locore)
67 * so independently compiled modules (e.g. LKMs) can be used irrespective
68 * of the `options SUN4?' combination a particular kernel was configured with.
69 * See also the definitions of NBPG, PGOFSET and PGSHIFT below.
70 */
71#if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE)
72extern int nbpg, pgofset, pgshift;
73#endif
74
75#if !(defined(PROM_AT_F0) || defined(MSIIEP))
76#define KERNBASE 0xf0000000 /* start of kernel virtual space */
77#else
78/*
79 * JS1/OF has prom sitting in f000.0000..f007.ffff, modify kernel VA
80 * layout to work around that. XXX - kernel should live beyond prom on
81 * those machines.
82 */
83#define KERNBASE 0xe8000000
84#endif
85#define KERNEND 0xfe000000 /* end of kernel virtual space */
86#define PROM_LOADADDR 0x00004000 /* where the prom loads us */
87#define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* start of kernel text */
88
89#define SSIZE 1 /* initial stack size in pages */
90#define USPACE 8192
91
92/*
93 * Constants related to network buffer management.
94 * MCLBYTES must be no larger than NBPG (the software page size), and,
95 * on machines that exchange pages of input or output buffers with mbuf
96 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
97 * of the hardware page size.
98 */
99#define MSIZE 256 /* size of an mbuf */
100
101#ifndef MCLSHIFT
102#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
103 /* 2K cluster can hold Ether frame */
104#endif /* MCLSHIFT */
105
106#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
107
108/*
109 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
110 * logical pages.
111 */
112#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT)
113#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
114
115#if defined(_KERNEL) || defined(_STANDALONE)
116#ifndef _LOCORE
117
118#ifndef __HIDE_DELAY
119extern void delay(unsigned int);
120#define DELAY(n) delay(n)
121#endif /* __HIDE_DELAY */
122
123#endif /* _LOCORE */
124
125/*
126 * microSPARC-IIep is a sun4m but with an integrated PCI controller.
127 * In a lot of places (like pmap &c) we want it to be treated as SUN4M.
128 * But since various low-level things are done very differently from
129 * normal sparcs (and since for now it requires a relocated kernel
130 * anyway), the MSIIEP kernels are not supposed to support any other
131 * system. So insist on SUN4M defined and SUN4 and SUN4C not defined.
132 */
133#if defined(MSIIEP)
134#if defined(SUN4) || defined(SUN4C) || defined(SUN4D)
135#error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d"
136#endif
137#if !defined(SUN4M)
138#error "microSPARC-IIep kernel must have 'options SUN4M'"
139#endif
140#endif /* MSIIEP */
141
142/*
143 * Sun4 machines have a page size of 8192. All other machines have a page
144 * size of 4096. Short cut page size variables if we can.
145 */
146#if CPU_NTYPES != 0 && !defined(SUN4)
147# define NBPG 4096
148# define PGOFSET (NBPG-1)
149# define PGSHIFT SUN4CM_PGSHIFT
150#elif CPU_NTYPES == 1 && defined(SUN4)
151# define NBPG 8192
152# define PGOFSET (NBPG-1)
153# define PGSHIFT SUN4_PGSHIFT
154#else
155# define NBPG nbpg
156# define PGOFSET pgofset
157# define PGSHIFT pgshift
158#endif
159
160/* Default audio blocksize in msec. See sys/dev/audio/audio.c */
161#define __AUDIO_BLK_MS (40)
162
163#endif /* _KERNEL || _STANDALONE */