1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 39 * 40 * @(#)param.h 7.8 (Berkeley) 6/28/91 41 * $Id: param.h,v 1.14 1994/09/16 02:39:36 jtc Exp $ 42 */ 43 #ifndef _MACHINE_PARAM_H_ 44 #define _MACHINE_PARAM_H_ 45 46 /* 47 * Machine dependent constants for amiga 48 */ 49 #define MACHINE "amiga" 50 #define MACHINE_ARCH "m68k" 51 #define MID_MACHINE MID_M68K 52 53 /* 54 * Round p (pointer or byte index) up to a correctly-aligned value 55 * for all data types (int, long, ...). The result is u_int and 56 * must be cast to any desired pointer type. 57 */ 58 #define ALIGNBYTES (sizeof(int) - 1) 59 #define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1)) 60 61 #define NBPG 8192 /* bytes/page */ 62 #define PGOFSET (NBPG-1) /* byte offset into page */ 63 #define PGSHIFT 13 /* LOG2(NBPG) */ 64 #define NPTEPG (NBPG/(sizeof(u_int))) 65 66 #define NBSEG (cpu040 ? 32*NBPG : 2048*NBPG) /* bytes/segment */ 67 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 68 #define SEGSHIFT (cpu040 ? 18 : 24) /* LOG2(NBSEG) */ 69 70 #define KERNBASE 0x0 /* start of kernel virtual */ 71 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 72 73 #define DEV_BSIZE 512 74 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 75 #define BLKDEV_IOSIZE 2048 76 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 77 78 #define CLSIZE 1 79 #define CLSIZELOG2 0 80 81 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 82 #define SSIZE 1 /* initial stack size/NBPG */ 83 #define SINCR 1 /* increment of stack/NBPG */ 84 85 #define UPAGES 2 /* pages of u-area */ 86 #define USPACE (UPAGES * NBPG) 87 88 /* 89 * Constants related to network buffer management. 90 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 91 * on machines that exchange pages of input or output buffers with mbuf 92 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 93 * of the hardware page size. 94 */ 95 #define MSIZE 128 /* size of an mbuf */ 96 #define MCLBYTES 1024 97 #define MCLSHIFT 10 98 #define MCLOFSET (MCLBYTES - 1) 99 #ifndef NMBCLUSTERS 100 #ifdef GATEWAY 101 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 102 #else 103 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 104 #endif 105 #endif 106 107 /* 108 * Size of kernel malloc arena in CLBYTES-sized logical pages 109 */ 110 #ifndef NKMEMCLUSTERS 111 #define NKMEMCLUSTERS (3072*1024/CLBYTES) 112 #endif 113 114 #define MAXPARTITIONS 16 115 116 /* pages ("clicks") to disk blocks */ 117 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 118 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 119 #define dtob(x) ((x)<<DEV_BSHIFT) 120 121 /* pages to bytes */ 122 #define ctob(x) ((x)<<PGSHIFT) 123 124 /* bytes to pages */ 125 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 126 127 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 128 ((unsigned)(bytes) >> DEV_BSHIFT) 129 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 130 ((unsigned)(db) << DEV_BSHIFT) 131 132 /* 133 * Map a ``block device block'' to a file system block. 134 * This should be device dependent, and should use the bsize 135 * field from the disk label. 136 * For now though just use DEV_BSIZE. 137 */ 138 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 139 140 /* 141 * Mach derived conversion macros 142 */ 143 #define amiga_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1)) 144 #define amiga_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1)) 145 #define amiga_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 146 #define amiga_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 147 #define amiga_btos(x) ((unsigned)(x) >> SEGSHIFT) 148 #define amiga_stob(x) ((unsigned)(x) << SEGSHIFT) 149 #define amiga_btop(x) ((unsigned)(x) >> PGSHIFT) 150 #define amiga_ptob(x) ((unsigned)(x) << PGSHIFT) 151 152 /* 153 * spl functions; all but spl0 are done in-line 154 */ 155 #include <machine/psl.h> 156 157 #define _debug_spl(s) \ 158 ({ \ 159 register int _spl_r; \ 160 \ 161 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 162 "&=d" (_spl_r) : "di" (s)); \ 163 if ((_spl_r&PSL_IPL) > (s&PSL_IPL)) \ 164 printf ("%s:%d:spl(%d) ==> spl(%d)!!\n",__FILE__,__LINE__, \ 165 ((PSL_IPL&_spl_r)>>8), ((PSL_IPL&s)>>8)); \ 166 _spl_r; \ 167 }) 168 169 #define _spl_no_check(s) \ 170 ({ \ 171 register int _spl_r; \ 172 \ 173 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 174 "&=d" (_spl_r) : "di" (s)); \ 175 _spl_r; \ 176 }) 177 #if defined (DEBUG) 178 #define _spl _debug_spl 179 #else 180 #define _spl _spl_no_check 181 #endif 182 183 /* spl0 requires checking for software interrupts */ 184 #define spl1() _spl(PSL_S|PSL_IPL1) 185 #define spl2() _spl(PSL_S|PSL_IPL2) 186 #define spl3() _spl(PSL_S|PSL_IPL3) 187 #define spl4() _spl(PSL_S|PSL_IPL4) 188 #define spl5() _spl(PSL_S|PSL_IPL5) 189 #define spl6() _spl(PSL_S|PSL_IPL6) 190 #define spl7() _spl(PSL_S|PSL_IPL7) 191 192 #define splnone() spl0() 193 #define splsoftclock() spl1() 194 #define splnet() spl1() 195 #define splbio() spl3() 196 #define splimp() spl3() 197 /* 198 * lowered to spl4 to allow for serial input into 199 * private ringbuffer inspite of spltty 200 */ 201 #define spltty() spl4() 202 #define splclock() spl6() 203 #define splstatclock() spl6() 204 #define splvm() spl6() 205 #define splhigh() spl7() 206 #define splsched() spl7() 207 208 #define splx(s) (s & PSL_IPL ? _spl_no_check(s) : spl0()) 209 210 #ifdef KERNEL 211 int cpuspeed; 212 void delay __P((int)); 213 void DELAY __P((int)); 214 #else 215 #define DELAY(n) { register int N = (n); while (--N > 0); } 216 #endif 217 218 #endif /* !_MACHINE_PARAM_H_ */ 219