1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Modified for VAX 940213/Ragge 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 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: @(#)param.h 5.8 (Berkeley) 6/28/91 39 * $Id: param.h,v 1.2 1994/08/16 23:41:54 ragge Exp $ 40 */ 41 42 #ifndef PARAM_H 43 #define PARAM_H 44 45 #include "psl.h" 46 47 /* 48 * Machine dependent constants for VAX. 49 */ 50 51 #define MACHINE "vax" 52 #define MID_MACHINE MID_VAX 53 #define UNIX "vmunix" 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 61 #define ALIGNBYTES (sizeof(int) - 1) 62 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 63 64 #define PGSHIFT 9 /* LOG2(NBPG) */ 65 #define NBPG (1<<PGSHIFT) /* (1 << PGSHIFT) bytes/page */ 66 #define PGOFSET (NBPG-1) /* byte offset into page */ 67 #define NPTEPG (NBPG/(sizeof (struct pte))) 68 69 #define KERNBASE 0x80000000 /* start of kernel virtual */ 70 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 71 72 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 73 #define DEV_BSIZE (1 << DEV_BSHIFT) 74 75 #define BLKDEV_IOSIZE 2048 76 #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ 77 78 #define CLSIZELOG2 1 79 #define CLSIZE 2 80 81 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 82 #define SSIZE 4 /* initial stack size/NBPG */ 83 #define SINCR 4 /* increment of stack/NBPG */ 84 85 #define UPAGES 16 /* pages of u-area */ 86 87 /* 88 * Constants related to network buffer management. 89 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 90 * on machines that exchange pages of input or output buffers with mbuf 91 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 92 * of the hardware page size. 93 */ 94 95 #ifndef MSIZE 96 #define MSIZE 128 /* size of an mbuf */ 97 #endif /* MSIZE */ 98 99 #ifndef MCLSHIFT 100 #define MCLSHIFT 10 /* convert bytes to m_buf clusters */ 101 #endif /* MCLSHIFT */ 102 #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ 103 #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ 104 105 #ifndef NMBCLUSTERS 106 #ifdef GATEWAY 107 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 108 #else 109 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 110 #endif /* GATEWAY */ 111 #endif /* NMBCLUSTERS */ 112 113 /* 114 * Size of kernel malloc arena in CLBYTES-sized logical pages 115 */ 116 117 #ifndef NKMEMCLUSTERS 118 #define NKMEMCLUSTERS (512*1024/CLBYTES) 119 #endif 120 121 /* 122 * Some macros for units conversion 123 */ 124 125 /* Core clicks (512 bytes) to segments and vice versa */ 126 127 #define ctos(x) (x) 128 #define stoc(x) (x) 129 130 /* Core clicks (512 bytes) to disk blocks */ 131 132 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 133 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 134 #define dtob(x) ((x)<<DEV_BSHIFT) 135 136 /* clicks to bytes */ 137 138 #define ctob(x) ((x)<<PGSHIFT) 139 140 /* bytes to clicks */ 141 142 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 143 144 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 145 ((unsigned)(bytes) >> DEV_BSHIFT) 146 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 147 ((unsigned)(db) << DEV_BSHIFT) 148 149 /* 150 * Map a ``block device block'' to a file system block. 151 * This should be device dependent, and will be if we 152 * add an entry to cdevsw/bdevsw for that purpose. 153 * For now though just use DEV_BSIZE. 154 */ 155 156 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 157 158 /* 159 * Mach derived conversion macros 160 */ 161 162 #define vax_round_pdr(x) ((((unsigned)(x)) + NBPDR - 1) & ~(NBPDR-1)) 163 #define vax_trunc_pdr(x) ((unsigned)(x) & ~(NBPDR-1)) 164 #define vax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 165 #define vax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 166 #define vax_btod(x) ((unsigned)(x) >> PDRSHIFT) 167 #define vax_dtob(x) ((unsigned)(x) << PDRSHIFT) 168 #define vax_btop(x) ((unsigned)(x) >> PGSHIFT) 169 #define vax_ptob(x) ((unsigned)(x) << PGSHIFT) 170 171 #define DELAY(x) kern_delay(x) 172 173 /* 174 #define _spl(s) \ 175 ({ \ 176 register int _spl_r; \ 177 \ 178 asm __volatile ("mfpr $18,%0; mtpr $%1,$18; " : \ 179 "&=r" (_spl_r) : "ir" (s)); \ 180 _spl_r; \ 181 }) 182 */ 183 184 /* spl0 requires checking for software interrupts */ 185 186 187 #define splsoftclock() _spl(PSL2IPL(PSL_IPL08)) 188 #define splnet() _spl(PSL2IPL(PSL_IPL0C)) 189 #define spl4() _spl(PSL2IPL(PSL_IPL14)) 190 #define spltty() _spl(PSL2IPL(PSL_IPL15)) 191 #define splbio() _spl(PSL2IPL(PSL_IPL15)) 192 #define splimp() _spl(PSL2IPL(PSL_IPL16)) 193 #define splclock() _spl(PSL2IPL(PSL_IPL18)) 194 #define splhigh() _spl(PSL2IPL(PSL_IPL1F)) 195 #define splstatclock() splclock() 196 /* 197 #define splvm() _spl(PSL2IPL(PSL_IPL14)) 198 #define splsched() _spl(PSL2IPL(PSL_IPL14)) 199 */ 200 201 /* watch out for side effects */ 202 #define splx(s) (s ? _spl(s) : spl0()) 203 204 #define ovbcopy(x,y,z) bcopy(x,y,z) /* This should work i hope... */ 205 206 #endif 207