1 /* $NetBSD: param.h,v 1.37 2026/07/03 17:35:09 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 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 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: machparam.h 1.16 92/12/20$ 37 * 38 * @(#)param.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 #ifndef _M68K_PARAM_H_ 42 #define _M68K_PARAM_H_ 43 44 #ifdef _KERNEL_OPT 45 #include "opt_param.h" 46 #endif 47 48 /* 49 * Machine independent constants for m68k 50 */ 51 #if defined(__mc68010__) 52 #define _MACHINE_ARCH m68000 53 #define MACHINE_ARCH "m68000" 54 #else 55 #define _MACHINE_ARCH m68k 56 #define MACHINE_ARCH "m68k" 57 #endif /* __mc68010__ */ 58 59 #ifndef MID_MACHINE 60 #define MID_MACHINE MID_M68K 61 #endif 62 63 #ifndef _KERNEL 64 #undef MACHINE 65 #define MACHINE "m68k" 66 #endif 67 68 #if defined(_KERNEL) || defined(_STANDALONE) 69 70 /* XXX this is still needed by the coredump module */ 71 #define USPACE 8192 /* sizeof kernel stack + pcb */ 72 73 #if !defined(_MODULE) 74 75 #ifndef KERNBASE 76 #define KERNBASE 0x00000000 /* start of kernel virtual */ 77 #endif 78 79 #define NBPG (1 << PGSHIFT) /* bytes/page */ 80 #define PGOFSET (NBPG-1) /* byte offset into page */ 81 82 #define UPAGES (USPACE >> PGSHIFT) 83 84 #ifndef MSGBUFSIZE 85 #define MSGBUFSIZE 8192 /* default message buffer size */ 86 #endif 87 88 #if defined(__mc68010__) 89 /* 90 * Clamp UBC parameters; the default consume way to much kernel VA space, 91 * and it's in short supply on 68010. (Actually, the defaults exceed the 92 * total available on the 68010.) 93 * 94 * XXX Perhaps these can be tuned upwards eventually? 95 */ 96 #define UBC_WINSHIFT 13 /* 8KB */ 97 #define UBC_NWINS 32 /* -> 256KB */ 98 99 /* 100 * Limit the number of concurrent exec(2) calls on 68010, as they 101 * consume kernel VA space. 102 */ 103 #define MAXEXEC 1 104 105 #define __NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PGSHIFT) 106 #define __NKMEMPAGES_MAX_DEFAULT ((8 * 1024 * 1024) >> PGSHIFT) 107 108 #else /* ! __mc68010__ */ 109 110 #define __NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PGSHIFT) 111 #define __NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PGSHIFT) 112 113 #endif /* __mc68010__ */ 114 115 /* 116 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 117 * logical pages. 118 */ 119 #ifndef NKMEMPAGES_MIN_DEFAULT 120 #define NKMEMPAGES_MIN_DEFAULT __NKMEMPAGES_MIN_DEFAULT 121 #endif 122 #if !defined(NKMEMPAGES_MAX_UNLIMITED) && !defined(NKMEMPAGES_MAX_DEFAULT) 123 #define NKMEMPAGES_MAX_DEFAULT __NKMEMPAGES_MAX_DEFAULT 124 #endif 125 126 /* 127 * Mach-derived conversion macros 128 */ 129 #define m68k_round_page(x) ((((vaddr_t)(x)) + PGOFSET) & ~PGOFSET) 130 #define m68k_trunc_page(x) ((vaddr_t)(x) & ~PGOFSET) 131 #define m68k_page_offset(x) ((vaddr_t)(x) & PGOFSET) 132 #define m68k_btop(x) ((vaddr_t)(x) >> PGSHIFT) 133 #define m68k_ptob(x) ((vaddr_t)(x) << PGSHIFT) 134 135 #endif /* ! _MODULE */ 136 137 #endif /* _KERNEL || _STANDALONE */ 138 139 /* 140 * Constants related to network buffer management. 141 * MCLBYTES must be no larger than NBPG (the software page size), and, 142 * on machines that exchange pages of input or output buffers with mbuf 143 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 144 * of the hardware page size. 145 */ 146 #define MSIZE 256 /* size of an mbuf */ 147 148 #ifndef MCLSHIFT 149 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 150 /* 2K cluster can hold Ether frame */ 151 #endif /* MCLSHIFT */ 152 153 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 154 155 #if defined(_KERNEL) 156 void delay(unsigned int); 157 #define DELAY(us) delay(us) 158 159 /* Default audio blocksize in msec. See sys/dev/audio/audio.c */ 160 #define __AUDIO_BLK_MS (40) 161 #endif 162 163 #endif /* !_M68K_PARAM_H_ */ 164
Indexes created Tue Aug 11 00:25:38 UTC 2026