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 * from: @(#)param.h 7.8 (Berkeley) 6/28/91 40 * $Id: param.h,v 1.3 1993/09/02 18:08:22 mw Exp $ 41 */ 42 43 /* 44 * Machine dependent constants for amiga 45 */ 46 #define MACHINE "amiga" 47 /* this is the common denominator, MID_AMIGA040 binaries should never be 48 the default */ 49 #define MID_MACHINE MID_AMIGA030 50 51 /* 52 * Round p (pointer or byte index) up to a correctly-aligned value 53 * for all data types (int, long, ...). The result is u_int and 54 * must be cast to any desired pointer type. 55 */ 56 #define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1)) 57 58 #define NBPG 8192 /* bytes/page */ 59 #define PGOFSET (NBPG-1) /* byte offset into page */ 60 #define PGSHIFT 13 /* LOG2(NBPG) */ 61 #define NPTEPG (NBPG/(sizeof (struct pte))) 62 63 #define NBSEG (2048*NBPG) /* bytes/segment */ 64 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 65 #define SEGSHIFT 24 /* LOG2(NBSEG) */ 66 67 #define KERNBASE 0x0 /* start of kernel virtual */ 68 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 69 70 #define DEV_BSIZE 512 71 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 72 #define BLKDEV_IOSIZE 2048 73 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 74 75 #define CLSIZE 1 76 #define CLSIZELOG2 0 77 78 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 79 #define SSIZE 1 /* initial stack size/NBPG */ 80 #define SINCR 1 /* increment of stack/NBPG */ 81 82 #define UPAGES 2 /* pages of u-area */ 83 84 /* 85 * Constants related to network buffer management. 86 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 87 * on machines that exchange pages of input or output buffers with mbuf 88 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 89 * of the hardware page size. 90 */ 91 #define MSIZE 128 /* size of an mbuf */ 92 #define MCLBYTES 1024 93 #define MCLSHIFT 10 94 #define MCLOFSET (MCLBYTES - 1) 95 #ifndef NMBCLUSTERS 96 #ifdef GATEWAY 97 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 98 #else 99 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 100 #endif 101 #endif 102 103 /* 104 * Size of kernel malloc arena in CLBYTES-sized logical pages 105 */ 106 #ifndef NKMEMCLUSTERS 107 #define NKMEMCLUSTERS (3072*1024/CLBYTES) 108 #endif 109 110 /* pages ("clicks") to disk blocks */ 111 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 112 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 113 #define dtob(x) ((x)<<DEV_BSHIFT) 114 115 /* pages to bytes */ 116 #define ctob(x) ((x)<<PGSHIFT) 117 118 /* bytes to pages */ 119 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 120 121 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 122 ((unsigned)(bytes) >> DEV_BSHIFT) 123 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 124 ((unsigned)(db) << DEV_BSHIFT) 125 126 /* 127 * Map a ``block device block'' to a file system block. 128 * This should be device dependent, and should use the bsize 129 * field from the disk label. 130 * For now though just use DEV_BSIZE. 131 */ 132 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 133 134 /* 135 * Mach derived conversion macros 136 */ 137 #define amiga_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1)) 138 #define amiga_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1)) 139 #define amiga_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 140 #define amiga_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 141 #define amiga_btos(x) ((unsigned)(x) >> SEGSHIFT) 142 #define amiga_stob(x) ((unsigned)(x) << SEGSHIFT) 143 #define amiga_btop(x) ((unsigned)(x) >> PGSHIFT) 144 #define amiga_ptob(x) ((unsigned)(x) << PGSHIFT) 145 146 /* 147 * spl functions; all but spl0 are done in-line 148 */ 149 #include <machine/psl.h> 150 151 #define _spl(s) \ 152 ({ \ 153 register int _spl_r; \ 154 \ 155 asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 156 "&=d" (_spl_r) : "di" (s)); \ 157 _spl_r; \ 158 }) 159 160 /* spl0 requires checking for software interrupts */ 161 #define spl1() _spl(PSL_S|PSL_IPL1) 162 #define spl2() _spl(PSL_S|PSL_IPL2) 163 #define spl3() _spl(PSL_S|PSL_IPL3) 164 #define spl4() _spl(PSL_S|PSL_IPL4) 165 #define spl5() _spl(PSL_S|PSL_IPL5) 166 #define spl6() _spl(PSL_S|PSL_IPL6) 167 #define spl7() _spl(PSL_S|PSL_IPL7) 168 169 #define splnone() spl0() 170 #define splsoftclock() spl1() 171 #define splnet() spl1() 172 #define splbio() spl3() 173 #define splimp() spl3() 174 /* lowered to spl4 to allow for serial input into 175 private ringbuffer inspite of spltty */ 176 #define spltty() spl4() 177 #define splclock() spl6() 178 #define splvm() spl6() 179 #define splhigh() spl7() 180 #define splsched() spl7() 181 182 /* watch out for side effects */ 183 #define splx(s) (s & PSL_IPL ? _spl(s) : spl0()) 184 185 #ifdef KERNEL 186 int cpuspeed; 187 extern int DELAY __P((int count)); 188 #else 189 #define DELAY(n) { register int N = (n); while (--N > 0); } 190 #endif 191 192