1 /* $NetBSD: param.h,v 1.15 1996/10/13 04:11:16 christos 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 "atari" 53 #define _MACHINE_ARCH m68k 54 #define MACHINE_ARCH "m68k" 55 #define MID_MACHINE MID_M68K 56 57 /* 58 * Round p (pointer or byte index) up to a correctly-aligned value 59 * for all data types (int, long, ...). The result is u_int and 60 * must be cast to any desired pointer type. 61 */ 62 #define ALIGNBYTES (sizeof(int) - 1) 63 #define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1)) 64 65 #define NBPG 8192 /* bytes/page */ 66 #define PGOFSET (NBPG-1) /* byte offset into page */ 67 #define PGSHIFT 13 /* LOG2(NBPG) */ 68 #define NPTEPG (NBPG/(sizeof(u_int))) 69 70 #define NBSEG (cpu040 ? 32*NBPG : 2048*NBPG) /* bytes/segment */ 71 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 72 #define SEGSHIFT 24 /* LOG2(NBSEG) [68030 value] */ 73 74 #define KERNBASE 0x0 /* start of kernel virtual */ 75 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 76 77 #define DEV_BSIZE 512 78 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 79 #define BLKDEV_IOSIZE 2048 80 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 81 82 #define CLSIZE 1 83 #define CLSIZELOG2 0 84 85 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 86 #define SSIZE 1 /* initial stack size/NBPG */ 87 #define SINCR 1 /* increment of stack/NBPG */ 88 89 #define UPAGES 2 /* pages of u-area */ 90 #define USPACE (UPAGES * NBPG) 91 92 /* 93 * Constants related to network buffer management. 94 * MCLBYTES must be no larger than CLBYTES (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 128 /* size of an mbuf */ 100 #define MCLBYTES 1024 101 #define MCLSHIFT 10 102 #define MCLOFSET (MCLBYTES - 1) 103 #ifndef NMBCLUSTERS 104 #ifdef GATEWAY 105 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 106 #else 107 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 108 #endif 109 #endif 110 111 /* 112 * Size of kernel malloc arena in CLBYTES-sized logical pages 113 */ 114 #ifndef NKMEMCLUSTERS 115 #define NKMEMCLUSTERS (3072*1024/CLBYTES) 116 #endif 117 118 /* pages ("clicks") to disk blocks */ 119 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 120 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 121 122 /* pages to bytes */ 123 #define ctob(x) ((x) << PGSHIFT) 124 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 125 126 /* bytes to disk blocks */ 127 #define btodb(x) ((x) >> DEV_BSHIFT) 128 #define dbtob(x) ((x) << DEV_BSHIFT) 129 130 /* 131 * Map a ``block device block'' to a file system block. 132 * This should be device dependent, and should use the bsize 133 * field from the disk label. 134 * For now though just use DEV_BSIZE. 135 */ 136 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 137 138 /* 139 * Mach derived conversion macros 140 */ 141 #define atari_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1)) 142 #define atari_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1)) 143 #define atari_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 144 #define atari_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 145 #define atari_btos(x) ((unsigned)(x) >> SEGSHIFT) 146 #define atari_stob(x) ((unsigned)(x) << SEGSHIFT) 147 #define atari_btop(x) ((unsigned)(x) >> PGSHIFT) 148 #define atari_ptob(x) ((unsigned)(x) << PGSHIFT) 149 150 /* 151 * spl functions; all but spl0 are done in-line 152 */ 153 #include <machine/psl.h> 154 155 #define _debug_spl(s) \ 156 ({ \ 157 register int _spl_r; \ 158 \ 159 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 160 "&=d" (_spl_r) : "di" (s)); \ 161 if ((_spl_r&PSL_IPL) > (s&PSL_IPL)) \ 162 printf ("%s:%d:spl(%d) ==> spl(%d)!!\n",__FILE__,__LINE__, \ 163 ((PSL_IPL&_spl_r)>>8), ((PSL_IPL&s)>>8)); \ 164 _spl_r; \ 165 }) 166 167 #define _spl_no_check(s) \ 168 ({ \ 169 register int _spl_r; \ 170 \ 171 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 172 "&=d" (_spl_r) : "di" (s)); \ 173 _spl_r; \ 174 }) 175 #if defined (DEBUG) 176 #define _spl _debug_spl 177 #else 178 #define _spl _spl_no_check 179 #endif 180 181 /* spl0 requires checking for software interrupts */ 182 #define spl1() _spl(PSL_S|PSL_IPL1) 183 #define spl2() _spl(PSL_S|PSL_IPL2) 184 #define spl3() _spl(PSL_S|PSL_IPL3) 185 #define spl4() _spl(PSL_S|PSL_IPL4) 186 #define spl5() _spl(PSL_S|PSL_IPL5) 187 #define spl6() _spl(PSL_S|PSL_IPL6) 188 #define spl7() _spl(PSL_S|PSL_IPL7) 189 190 #define splnone() spl0() 191 #define splsoftclock() spl1() 192 #define splsoftnet() spl1() 193 #define splbio() spl3() 194 #define splnet() spl3() 195 /* 196 * lowered to spl4 to allow for serial input into 197 * private ringbuffer inspite of spltty 198 */ 199 #define spltty() spl4() 200 #define splimp() spl4() 201 #define splclock() spl6() 202 #define splstatclock() spl6() 203 #define splvm() spl6() 204 #define splhigh() spl7() 205 #define splsched() spl7() 206 207 #define splx(s) (s & PSL_IPL ? _spl_no_check(s) : spl0()) 208 209 #ifdef _KERNEL 210 int spl0 __P((void)); 211 void delay __P((int)); 212 213 #define DELAY(n) delay(n) 214 #endif /* _KERNEL */ 215 216 #endif /* !_MACHINE_PARAM_H_ */ 217