1 /* $NetBSD: param.h,v 1.23 1994/11/28 19:13:18 gwr Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Gordon W. Ross 5 * Copyright (c) 1993 Adam Glass 6 * Copyright (c) 1988 University of Utah. 7 * Copyright (c) 1982, 1986, 1990, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * the Systems Programming Group of the University of Utah Computer 12 * Science Department. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * from: Utah Hdr: machparam.h 1.16 92/12/20 43 * from: @(#)param.h 8.1 (Berkeley) 6/10/93 44 */ 45 46 #ifndef MACHINE 47 48 /* 49 * Machine dependent constants for the Sun3 series. 50 */ 51 #define MACHINE "sun3" 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 3 61 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 62 63 #define NBPG 8192 /* bytes/page */ 64 #define PGOFSET (NBPG-1) /* byte offset into page */ 65 #define PGSHIFT 13 /* LOG2(NBPG) */ 66 67 #define NBSG 0x20000 /* bytes/segment */ 68 #define SEGOFSET (NBSG-1) /* byte offset into segment */ 69 #define SEGSHIFT 17 /* LOG2(NBSG) */ 70 71 #define KERNBASE 0x0E000000 /* 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 << PGSHIFT) 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 2048 /* large enough for ether MTU */ 98 #define MCLSHIFT 11 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 (2048*1024/CLBYTES) 113 #endif 114 115 /* pages ("clicks") (4096 bytes) to disk blocks */ 116 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 117 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 118 #define dtob(x) ((x)<<DEV_BSHIFT) 119 120 /* pages to bytes */ 121 #define ctob(x) ((x)<<PGSHIFT) 122 123 /* bytes to pages */ 124 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 125 126 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 127 ((unsigned)(bytes) >> DEV_BSHIFT) 128 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 129 ((unsigned)(db) << DEV_BSHIFT) 130 131 /* 132 * Map a ``block device block'' to a file system block. 133 * This should be device dependent, and should use the bsize 134 * field from the disk label. 135 * For now though just use DEV_BSIZE. 136 */ 137 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 138 139 /* 140 * Mach derived conversion macros 141 */ 142 #define sun3_round_seg(x) ((((unsigned)(x)) + SEGOFSET) & ~SEGOFSET) 143 #define sun3_trunc_seg(x) ((unsigned)(x) & ~SEGOFSET) 144 #define sun3_btos(x) ((unsigned)(x) >> SEGSHIFT) 145 #define sun3_stob(x) ((unsigned)(x) << SEGSHIFT) 146 147 #define sun3_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET) 148 #define sun3_trunc_page(x) ((unsigned)(x) & ~PGOFSET) 149 #define sun3_btop(x) ((unsigned)(x) >> PGSHIFT) 150 #define sun3_ptob(x) ((unsigned)(x) << PGSHIFT) 151 152 /* 153 * Suns have a REAL interrupt register, so spl0() and splx(s) 154 * have no need to check for any simulated interrupts, etc. 155 * All are done in-line (if optimization turned on). 156 */ 157 #include <machine/psl.h> 158 159 #ifdef __GNUC__ 160 /* 161 * This is as close to a macro as one can get. 162 * (See the GCC extensions info document.) 163 */ 164 extern __inline__ int _spl(int new) 165 { 166 register int old; 167 __asm__ __volatile ("clrl %0; movw sr,%0; movw %1,sr" : 168 "&=d" (old) : "di" (new)); 169 return (old); 170 } 171 #endif /* GNUC */ 172 173 #define spl0() _spl(PSL_S|PSL_IPL0) 174 #define spl1() _spl(PSL_S|PSL_IPL1) 175 #define spl2() _spl(PSL_S|PSL_IPL2) 176 #define spl3() _spl(PSL_S|PSL_IPL3) 177 #define spl4() _spl(PSL_S|PSL_IPL4) 178 #define spl5() _spl(PSL_S|PSL_IPL5) 179 #define spl6() _spl(PSL_S|PSL_IPL6) 180 #define spl7() _spl(PSL_S|PSL_IPL7) 181 #define splx(x) _spl(x) 182 183 #define splsoftclock() spl1() 184 #define splnet() spl3() 185 #define splbio() spl2() 186 #define splimp() spl3() 187 #define spltty() spl2() 188 #define splzs() spl6() 189 #define splclock() spl5() 190 #define splstatclock() splclock() 191 #define splvm() splimp() 192 #define splhigh() spl7() 193 #define splsched() spl7() 194 195 #ifdef KERNEL 196 #ifndef LOCORE 197 #define DELAY(n) delay(n) 198 #endif 199 200 #else 201 #define DELAY(n) { register int N = (n); while (--N > 0); } 202 #endif 203 204 #endif /* MACHINE */ 205