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) 72 extern 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 119 extern 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 */ 164