param.h revision 1.16
1/* $NetBSD: param.h,v 1.16 1994/12/28 09:08:41 chopps 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#ifndef _MACHINE_PARAM_H_ 45#define _MACHINE_PARAM_H_ 46 47/* 48 * Machine dependent constants for amiga 49 */ 50#define MACHINE "amiga" 51#define MACHINE_ARCH "m68k" 52#define MID_MACHINE MID_M68K 53 54/* 55 * Round p (pointer or byte index) up to a correctly-aligned value 56 * for all data types (int, long, ...). The result is u_int and 57 * must be cast to any desired pointer type. 58 */ 59#define ALIGNBYTES (sizeof(int) - 1) 60#define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1)) 61 62#define NBPG 8192 /* bytes/page */ 63#define PGOFSET (NBPG-1) /* byte offset into page */ 64#define PGSHIFT 13 /* LOG2(NBPG) */ 65#define NPTEPG (NBPG/(sizeof(u_int))) 66 67#define NBSEG (cpu040 ? 32*NBPG : 2048*NBPG) /* bytes/segment */ 68#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 69#define SEGSHIFT (cpu040 ? 18 : 24) /* LOG2(NBSEG) */ 70 71#define KERNBASE 0x0 /* start of kernel virtual */ 72#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 73 74#define DEV_BSIZE 512 75#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 76#define BLKDEV_IOSIZE 2048 77#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 78 79#define CLSIZE 1 80#define CLSIZELOG2 0 81 82/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 83#define SSIZE 1 /* initial stack size/NBPG */ 84#define SINCR 1 /* increment of stack/NBPG */ 85 86#define UPAGES 2 /* pages of u-area */ 87#define USPACE (UPAGES * NBPG) 88 89/* 90 * Constants related to network buffer management. 91 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 92 * on machines that exchange pages of input or output buffers with mbuf 93 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 94 * of the hardware page size. 95 */ 96#define MSIZE 128 /* size of an mbuf */ 97#define MCLBYTES 1024 98#define MCLSHIFT 10 99#define MCLOFSET (MCLBYTES - 1) 100#ifndef NMBCLUSTERS 101#ifdef GATEWAY 102#define NMBCLUSTERS 512 /* map size, max cluster allocation */ 103#else 104#define NMBCLUSTERS 256 /* map size, max cluster allocation */ 105#endif 106#endif 107 108/* 109 * Size of kernel malloc arena in CLBYTES-sized logical pages 110 */ 111#ifndef NKMEMCLUSTERS 112#define NKMEMCLUSTERS (3072*1024/CLBYTES) 113#endif 114 115#define MAXPARTITIONS 16 116 117/* pages ("clicks") to disk blocks */ 118#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 119#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 120#define dtob(x) ((x)<<DEV_BSHIFT) 121 122/* pages to bytes */ 123#define ctob(x) ((x)<<PGSHIFT) 124 125/* bytes to pages */ 126#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 127 128#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 129 ((unsigned)(bytes) >> DEV_BSHIFT) 130#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 131 ((unsigned)(db) << DEV_BSHIFT) 132 133/* 134 * Map a ``block device block'' to a file system block. 135 * This should be device dependent, and should use the bsize 136 * field from the disk label. 137 * For now though just use DEV_BSIZE. 138 */ 139#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 140 141/* 142 * Mach derived conversion macros 143 */ 144#define amiga_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1)) 145#define amiga_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1)) 146#define amiga_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 147#define amiga_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 148#define amiga_btos(x) ((unsigned)(x) >> SEGSHIFT) 149#define amiga_stob(x) ((unsigned)(x) << SEGSHIFT) 150#define amiga_btop(x) ((unsigned)(x) >> PGSHIFT) 151#define amiga_ptob(x) ((unsigned)(x) << PGSHIFT) 152 153/* 154 * spl functions; all but spl0 are done in-line 155 */ 156#include <machine/psl.h> 157 158#if 0 159#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)&&((s)&PSL_IPL)!=PSL_IPL1) \ 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#else 171/* 172 * Don't lower IPL below current IPL (unless new IPL is 6) 173 */ 174#define _debug_spl(s) \ 175({ \ 176 register int _spl_r; \ 177\ 178 __asm __volatile ("clrl %0; movew sr,%0" : \ 179 "&=d" (_spl_r)); \ 180 if ((((s)&PSL_IPL) >= PSL_IPL6) || (_spl_r&PSL_IPL) < ((s)&PSL_IPL) || ((s)&PSL_IPL) <= PSL_IPL1) \ 181 __asm __volatile ("movew %0,sr" : : "di" (s)); \ 182 _spl_r; \ 183}) 184#endif 185 186#define _spl_no_check(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#if defined (DEBUGXX) /* No workee */ 195#define _spl _debug_spl 196#else 197#define _spl _spl_no_check 198#endif 199 200/* spl0 requires checking for software interrupts */ 201#define spl1() _spl(PSL_S|PSL_IPL1) 202#define spl2() _spl(PSL_S|PSL_IPL2) 203#define spl3() _spl(PSL_S|PSL_IPL3) 204#define spl4() _spl(PSL_S|PSL_IPL4) 205#define spl5() _spl(PSL_S|PSL_IPL5) 206#define spl6() _spl(PSL_S|PSL_IPL6) 207#define spl7() _spl(PSL_S|PSL_IPL7) 208 209#define splnone() spl0() 210#define splsoftclock() spl1() 211#define splnet() spl1() 212#define splbio() spl3() 213#define splimp() spl3() 214/* 215 * lowered to spl4 to allow for serial input into 216 * private ringbuffer inspite of spltty 217 */ 218#define spltty() spl4() 219#define splclock() spl6() 220#define splstatclock() spl6() 221#define splvm() spl6() 222#define splhigh() spl7() 223#define splsched() spl7() 224 225#define splx(s) (s & PSL_IPL ? _spl_no_check(s) : spl0()) 226 227#ifdef KERNEL 228int cpuspeed; 229void delay __P((int)); 230void DELAY __P((int)); 231#else 232#define DELAY(n) { register int N = (n); while (--N > 0); } 233#endif 234 235#endif /* !_MACHINE_PARAM_H_ */ 236