1 /* $NetBSD: param.h,v 1.4 1994/11/25 19:08:54 ragge Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Modified for VAX 940213/Ragge 8 * 9 * This code is derived from software contributed to Berkeley by 10 * William Jolitz. 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 * @(#)param.h 5.8 (Berkeley) 6/28/91 41 */ 42 43 #ifndef _VAX_PARAM_H_ 44 #define _VAX_PARAM_H_ 45 46 #include "psl.h" 47 48 /* 49 * Machine dependent constants for VAX. 50 */ 51 52 #define MACHINE "vax" 53 #define MID_MACHINE MID_VAX 54 #define UNIX "vmunix" 55 56 /* 57 * Round p (pointer or byte index) up to a correctly-aligned value 58 * for all data types (int, long, ...). The result is u_int and 59 * must be cast to any desired pointer type. 60 */ 61 62 #define ALIGNBYTES (sizeof(int) - 1) 63 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 64 65 #define PGSHIFT 9 /* LOG2(NBPG) */ 66 #define NBPG (1<<PGSHIFT) /* (1 << PGSHIFT) bytes/page */ 67 #define PGOFSET (NBPG-1) /* byte offset into page */ 68 #define NPTEPG (NBPG/(sizeof (struct pte))) 69 70 #define KERNBASE 0x80000000 /* start of kernel virtual */ 71 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 72 73 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 74 #define DEV_BSIZE (1 << DEV_BSHIFT) 75 76 #define BLKDEV_IOSIZE 2048 77 #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ 78 79 #define CLSIZELOG2 1 80 #define CLSIZE 2 81 82 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 83 #define SSIZE 4 /* initial stack size/NBPG */ 84 #define SINCR 4 /* increment of stack/NBPG */ 85 86 #define UPAGES 16 /* pages of u-area */ 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 96 #ifndef MSIZE 97 #define MSIZE 128 /* size of an mbuf */ 98 #endif /* MSIZE */ 99 100 #ifndef MCLSHIFT 101 #define MCLSHIFT 10 /* convert bytes to m_buf clusters */ 102 #endif /* MCLSHIFT */ 103 #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ 104 #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ 105 106 #ifndef NMBCLUSTERS 107 #ifdef GATEWAY 108 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 109 #else 110 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 111 #endif /* GATEWAY */ 112 #endif /* NMBCLUSTERS */ 113 114 /* 115 * Size of kernel malloc arena in CLBYTES-sized logical pages 116 */ 117 118 #ifndef NKMEMCLUSTERS 119 #define NKMEMCLUSTERS (512*1024/CLBYTES) 120 #endif 121 122 /* 123 * Some macros for units conversion 124 */ 125 126 /* Core clicks (512 bytes) to segments and vice versa */ 127 128 #define ctos(x) (x) 129 #define stoc(x) (x) 130 131 /* Core clicks (512 bytes) to disk blocks */ 132 133 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 134 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 135 #define dtob(x) ((x)<<DEV_BSHIFT) 136 137 /* clicks to bytes */ 138 139 #define ctob(x) ((x)<<PGSHIFT) 140 141 /* bytes to clicks */ 142 143 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 144 145 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 146 ((unsigned)(bytes) >> DEV_BSHIFT) 147 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 148 ((unsigned)(db) << DEV_BSHIFT) 149 150 /* 151 * Map a ``block device block'' to a file system block. 152 * This should be device dependent, and will be if we 153 * add an entry to cdevsw/bdevsw for that purpose. 154 * For now though just use DEV_BSIZE. 155 */ 156 157 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 158 159 /* 160 * Mach derived conversion macros 161 */ 162 163 #define vax_round_pdr(x) ((((unsigned)(x)) + NBPDR - 1) & ~(NBPDR-1)) 164 #define vax_trunc_pdr(x) ((unsigned)(x) & ~(NBPDR-1)) 165 #define vax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 166 #define vax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 167 #define vax_btod(x) ((unsigned)(x) >> PDRSHIFT) 168 #define vax_dtob(x) ((unsigned)(x) << PDRSHIFT) 169 #define vax_btop(x) ((unsigned)(x) >> PGSHIFT) 170 #define vax_ptob(x) ((unsigned)(x) << PGSHIFT) 171 172 #define DELAY(x) kern_delay(x) 173 174 #define splx(reg) \ 175 ({ \ 176 register int val; \ 177 asm __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \ 178 : "=g" (val) \ 179 : "g" (reg)); \ 180 val; \ 181 }) 182 183 184 #define spl0() splx(0) /* IPL0 */ 185 #define splsoftclock() splx(8) /* IPL08 */ 186 #define splnet() splx(0xc) /* IPL0C */ 187 #define spl4() splx(0x14) /* IPL14 */ 188 #define spltty() splx(0x15) /* IPL15 */ 189 #define splbio() splx(0x15) /* IPL15 */ 190 #define splimp() splx(0x16) /* IPL16 */ 191 #define splclock() splx(0x18) /* IPL18 */ 192 #define splhigh() splx(0x1f) /* IPL1F */ 193 #define splstatclock() splclock() 194 195 #define ovbcopy(x,y,z) bcopy(x,y,z) /* This should work i hope... */ 196 197 #endif /* _VAX_PARAM_H_ */ 198