param.h revision 1.22
1 /* $NetBSD: param.h,v 1.22 1996/01/13 01:41:05 briggs Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 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. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. 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 /*- 41 * Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo, 42 * Michael L. Finch, Bradley A. Grantham, and 43 * Lawrence A. Kesteloot 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the Alice Group. 57 * 4. The names of the Alice Group or any of its members may not be used 58 * to endorse or promote products derived from this software without 59 * specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR 62 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 63 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 64 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT, 65 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 66 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 67 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 68 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 69 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 70 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 71 * 72 */ 73 /* 74 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 75 * 76 * @(#)param.h 7.8 (Berkeley) 6/28/91 77 */ 78 79 #ifndef _MACHINE_PARAM_H_ 80 #define _MACHINE_PARAM_H_ 1 81 82 #ifndef PSL_IPL 83 #include "machine/psl.h" 84 #endif /* PSL_IPL */ 85 86 /* 87 * Machine dependent constants for Macintosh II-and-similar series. 88 */ 89 #define MACHINE "mac68k" 90 #define MACHINE_ARCH "m68k" 91 #define MID_MACHINE MID_M68K 92 93 /* 94 * Round p (pointer or byte index) up to a correctly-aligned value 95 * for all data types (int, long, ...). The result is u_int and 96 * must be cast to any desired pointer type. 97 */ 98 #define ALIGNBYTES (sizeof(int) - 1) 99 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 100 101 #define PGSHIFT 12 /* LOG2(NBPG) */ 102 #define NBPG (1 << PGSHIFT) /* bytes/page */ 103 #define PGOFSET (NBPG-1) /* byte offset into page */ 104 #define NPTEPG (NBPG/(sizeof (pt_entry_t))) 105 106 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 107 #define NBSEG (1 << SEGSHIFT) /* bytes/segment */ 108 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 109 110 #define KERNBASE 0x00000000 /* start of kernel virtual */ 111 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 112 113 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 114 #define DEV_BSIZE (1 << DEV_BSHIFT) 115 #define BLKDEV_IOSIZE 2048 116 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 117 118 #define CLSIZELOG2 0 119 #define CLSIZE (1 << CLSIZELOG2) 120 121 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 122 #define SSIZE 1 /* initial stack size/NBPG */ 123 #define SINCR 1 /* increment of stack/NBPG */ 124 #define UPAGES 3 /* pages of u-area */ 125 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 126 127 /* 128 * Constants related to network buffer management. 129 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 130 * on machines that exchange pages of input or output buffers with mbuf 131 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 132 * of the hardware page size. 133 */ 134 #define MSIZE 128 /* size of an mbuf */ 135 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 136 #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ 137 #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ 138 139 #ifndef NMBCLUSTERS 140 #ifdef GATEWAY 141 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 142 #else 143 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 144 #endif 145 #endif 146 147 /* 148 * Size of kernel malloc arena in CLBYTES-sized logical pages 149 */ 150 #ifndef NKMEMCLUSTERS 151 #define NKMEMCLUSTERS (2048 * 1024 / CLBYTES) 152 #endif 153 154 /* pages ("clicks") to disk blocks */ 155 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 156 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 157 158 /* pages to bytes */ 159 #define ctob(x) ((x) << PGSHIFT) 160 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 161 162 /* bytes to disk blocks */ 163 #define btodb(x) ((x) >> DEV_BSHIFT) 164 #define dbtob(x) ((x) << DEV_BSHIFT) 165 166 /* 167 * Map a ``block device block'' to a file system block. 168 * This should be device dependent, and should use the bsize 169 * field from the disk label. 170 * For now though just use DEV_BSIZE. 171 */ 172 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 173 174 /* 175 * Mach derived conversion macros 176 */ 177 #define mac68k_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET) 178 #define mac68k_trunc_page(x) ((unsigned)(x) & ~PGOFSET) 179 #define mac68k_btop(x) ((unsigned)(x) >> PGSHIFT) 180 #define mac68k_ptob(x) ((unsigned)(x) << PGSHIFT) 181 182 /* 183 * spl functions; all but spl0 are done in-line 184 */ 185 186 #define _spl(s) \ 187 ({ \ 188 register int _spl_r; \ 189 \ 190 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 191 "&=d" (_spl_r) : "di" (s)); \ 192 _spl_r; \ 193 }) 194 195 /* spl0 requires checking for software interrupts */ 196 #define spl1() _spl(PSL_S|PSL_IPL1) 197 #define spl2() _spl(PSL_S|PSL_IPL2) 198 #define spl3() _spl(PSL_S|PSL_IPL3) 199 #define spl4() _spl(PSL_S|PSL_IPL4) 200 #define spl5() _spl(PSL_S|PSL_IPL5) 201 #define spl6() _spl(PSL_S|PSL_IPL6) 202 #define spl7() _spl(PSL_S|PSL_IPL7) 203 204 /* These should be used for: 205 1) ensuring mutual exclusion (why use processor level?) 206 2) allowing faster devices to take priority 207 208 Note that on the mac, most things are masked at spl1, almost 209 everything at spl2, and everything but the panic switch and 210 power at spl4. 211 */ 212 #define splsoftclock() spl1() /* disallow softclock */ 213 #define splsoftnet() spl1() /* disallow network */ 214 #define splclock() spl1() /* disallow clock interrupt */ 215 #define spltty() spl1() /* disallow tty (softserial&adb) interrupts */ 216 #define splbio() spl2() /* disallow block I/O */ 217 #define splnet() spl2() /* disallow network */ 218 #define splimp() spl2() /* disallow imput */ 219 #define splhigh() spl7() /* disallow everything */ 220 #define splsched() spl7() /* disallow scheduling */ 221 222 #define splstatclock() spl2() /* This should be splclock... */ 223 224 /* watch out for side effects */ 225 #define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0()) 226 227 #define DELAY(ms) delay(ms) 228 229 #endif /* _MACHINE_PARAM_H_ */ 230
Indexes created Wed Sep 24 15:09:51 GMT 2025