1 /* $NetBSD: param.h,v 1.3 1995/03/26 07:24:38 leo 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. 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 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 41 * 42 * @(#)param.h 7.8 (Berkeley) 6/28/91 43 */ 44 45 #ifndef _MACHINE_PARAM_H_ 46 #define _MACHINE_PARAM_H_ 47 48 /* 49 * Machine dependent constants for atari 50 */ 51 #define MACHINE "atari" 52 #define MACHINE_ARCH "m68k" 53 #define MID_MACHINE MID_M68K 54 55 /* 56 * Round p (pointer or byte index) up to a correctly-aligned value 57 * for all data types (int, long, ...). The result is u_int and 58 * must be cast to any desired pointer type. 59 */ 60 #define ALIGNBYTES (sizeof(int) - 1) 61 #define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1)) 62 63 #define NBPG 8192 /* bytes/page */ 64 #define PGOFSET (NBPG-1) /* byte offset into page */ 65 #define PGSHIFT 13 /* LOG2(NBPG) */ 66 #define NPTEPG (NBPG/(sizeof(u_int))) 67 68 #define NBSEG (cpu040 ? 32*NBPG : 2048*NBPG) /* bytes/segment */ 69 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 70 #define SEGSHIFT (cpu040 ? 18 : 24) /* LOG2(NBSEG) */ 71 72 #define KERNBASE 0x0 /* start of kernel virtual */ 73 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 74 75 #define DEV_BSIZE 512 76 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 77 #define BLKDEV_IOSIZE 2048 78 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 79 80 #define CLSIZE 1 81 #define CLSIZELOG2 0 82 83 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 84 #define SSIZE 1 /* initial stack size/NBPG */ 85 #define SINCR 1 /* increment of stack/NBPG */ 86 87 #define UPAGES 2 /* pages of u-area */ 88 #define USPACE (UPAGES * NBPG) 89 90 /* 91 * Constants related to network buffer management. 92 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 93 * on machines that exchange pages of input or output buffers with mbuf 94 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 95 * of the hardware page size. 96 */ 97 #define MSIZE 128 /* size of an mbuf */ 98 #define MCLBYTES 1024 99 #define MCLSHIFT 10 100 #define MCLOFSET (MCLBYTES - 1) 101 #ifndef NMBCLUSTERS 102 #ifdef GATEWAY 103 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 104 #else 105 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 106 #endif 107 #endif 108 109 /* 110 * Size of kernel malloc arena in CLBYTES-sized logical pages 111 */ 112 #ifndef NKMEMCLUSTERS 113 #define NKMEMCLUSTERS (3072*1024/CLBYTES) 114 #endif 115 116 #define MAXPARTITIONS 16 117 118 /* pages ("clicks") to disk blocks */ 119 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 120 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 121 #define dtob(x) ((x)<<DEV_BSHIFT) 122 123 /* pages to bytes */ 124 #define ctob(x) ((x)<<PGSHIFT) 125 126 /* bytes to pages */ 127 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 128 129 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 130 ((bytes) >> DEV_BSHIFT) 131 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 132 ((db) << DEV_BSHIFT) 133 134 /* 135 * Map a ``block device block'' to a file system block. 136 * This should be device dependent, and should use the bsize 137 * field from the disk label. 138 * For now though just use DEV_BSIZE. 139 */ 140 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 141 142 /* 143 * Mach derived conversion macros 144 */ 145 #define atari_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1)) 146 #define atari_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1)) 147 #define atari_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 148 #define atari_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 149 #define atari_btos(x) ((unsigned)(x) >> SEGSHIFT) 150 #define atari_stob(x) ((unsigned)(x) << SEGSHIFT) 151 #define atari_btop(x) ((unsigned)(x) >> PGSHIFT) 152 #define atari_ptob(x) ((unsigned)(x) << PGSHIFT) 153 154 /* 155 * spl functions; all but spl0 are done in-line 156 */ 157 #include <machine/psl.h> 158 159 #define _debug_spl(s) \ 160 ({ \ 161 register int _spl_r; \ 162 \ 163 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 164 "&=d" (_spl_r) : "di" (s)); \ 165 if ((_spl_r&PSL_IPL) > (s&PSL_IPL)) \ 166 printf ("%s:%d:spl(%d) ==> spl(%d)!!\n",__FILE__,__LINE__, \ 167 ((PSL_IPL&_spl_r)>>8), ((PSL_IPL&s)>>8)); \ 168 _spl_r; \ 169 }) 170 171 #define _spl_no_check(s) \ 172 ({ \ 173 register int _spl_r; \ 174 \ 175 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 176 "&=d" (_spl_r) : "di" (s)); \ 177 _spl_r; \ 178 }) 179 #if defined (DEBUG) 180 #define _spl _debug_spl 181 #else 182 #define _spl _spl_no_check 183 #endif 184 185 /* spl0 requires checking for software interrupts */ 186 #define spl1() _spl(PSL_S|PSL_IPL1) 187 #define spl2() _spl(PSL_S|PSL_IPL2) 188 #define spl3() _spl(PSL_S|PSL_IPL3) 189 #define spl4() _spl(PSL_S|PSL_IPL4) 190 #define spl5() _spl(PSL_S|PSL_IPL5) 191 #define spl6() _spl(PSL_S|PSL_IPL6) 192 #define spl7() _spl(PSL_S|PSL_IPL7) 193 194 #define splnone() spl0() 195 #define splsoftclock() spl1() 196 #define splnet() spl1() 197 #define splbio() spl3() 198 #define splimp() spl3() 199 /* 200 * lowered to spl4 to allow for serial input into 201 * private ringbuffer inspite of spltty 202 */ 203 #define spltty() spl4() 204 #define splclock() spl6() 205 #define splstatclock() spl6() 206 #define splvm() spl6() 207 #define splhigh() spl7() 208 #define splsched() spl7() 209 210 #define splx(s) (s & PSL_IPL ? _spl_no_check(s) : spl0()) 211 212 #ifdef KERNEL 213 extern int cpuspeed; 214 void delay __P((int)); 215 void DELAY __P((int)); 216 #else 217 #define DELAY(n) { register int N = (n); while (--N > 0); } 218 #endif 219 220 #endif /* !_MACHINE_PARAM_H_ */ 221