1 /* $NetBSD: param.h,v 1.39 1999/10/22 21:14:34 ragge Exp $ */ 2 /*- 3 * Copyright (c) 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 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)param.h 5.8 (Berkeley) 6/28/91 38 */ 39 40 #ifndef _VAX_PARAM_H_ 41 #define _VAX_PARAM_H_ 42 43 /* 44 * Machine dependent constants for VAX. 45 */ 46 47 #define _MACHINE vax 48 #define MACHINE "vax" 49 #define _MACHINE_ARCH vax 50 #define MACHINE_ARCH "vax" 51 #define MID_MACHINE MID_VAX 52 53 /* 54 * Round p (pointer or byte index) up to a correctly-aligned value 55 * for all data types (int, long, ...). The result is u_int and 56 * must be cast to any desired pointer type. 57 * 58 * ALIGNED_POINTER is a boolean macro that checks whether an address 59 * is valid to fetch data elements of type t from on this architecture. 60 * This does not reflect the optimal alignment, just the possibility 61 * (within reasonable limits). 62 * 63 */ 64 65 #define ALIGNBYTES (sizeof(int) - 1) 66 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 67 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 68 69 #define PGSHIFT 12 /* LOG2(NBPG) */ 70 #define NBPG (1 << PGSHIFT) /* (1 << PGSHIFT) bytes/page */ 71 #define PGOFSET (NBPG - 1) /* byte offset into page */ 72 73 #define VAX_PGSHIFT 9 74 #define VAX_NBPG (1 << VAX_PGSHIFT) 75 #define VAX_PGOFSET (VAX_NBPG - 1) 76 77 #define KERNBASE 0x80000000 /* start of kernel virtual */ 78 79 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 80 #define DEV_BSIZE (1 << DEV_BSHIFT) 81 82 #define BLKDEV_IOSIZE 2048 83 #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ 84 #define MAXBSIZE 0x4000 /* max FS block size - XXX */ 85 86 #define CLSIZELOG2 0 /* XXX - die */ 87 #define CLSIZE 1 /* XXX - die */ 88 89 #define UPAGES 2 /* pages of u-area */ 90 #define USPACE (NBPG*UPAGES) 91 #define REDZONEADDR (VAX_NBPG*3) /* Must be > sizeof(struct user) */ 92 93 #ifndef MSGBUFSIZE 94 #define MSGBUFSIZE NBPG /* default message buffer size */ 95 #endif 96 97 /* 98 * Constants related to network buffer management. 99 * MCLBYTES must be no larger than NBPG (the software page size), and, 100 * on machines that exchange pages of input or output buffers with mbuf 101 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 102 * of the hardware page size. 103 */ 104 105 #ifndef MSIZE 106 #define MSIZE 128 /* size of an mbuf */ 107 #endif /* MSIZE */ 108 109 #ifndef MCLSHIFT 110 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 111 #endif /* MCLSHIFT */ 112 #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ 113 #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ 114 115 #ifndef NMBCLUSTERS 116 117 #if defined(_KERNEL) && !defined(_LKM) 118 #include "opt_gateway.h" 119 #endif /* _KERNEL && ! _LKM */ 120 121 #ifdef GATEWAY 122 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 123 #else 124 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 125 #endif /* GATEWAY */ 126 #endif /* NMBCLUSTERS */ 127 128 /* 129 * Size of kernel malloc arena in NBPG-sized logical pages 130 */ 131 132 #ifndef NKMEMCLUSTERS 133 #define NKMEMCLUSTERS (4096*1024/NBPG) 134 #endif 135 136 /* 137 * Some macros for units conversion 138 */ 139 140 /* pages ("clicks") to disk blocks */ 141 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 142 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 143 144 /* clicks to bytes */ 145 #define ctob(x) ((x) << PGSHIFT) 146 #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) 147 #define btop(x) (((unsigned)(x)) >> PGSHIFT) 148 149 /* bytes to disk blocks */ 150 #define btodb(x) ((x) >> DEV_BSHIFT) 151 #define dbtob(x) ((x) << DEV_BSHIFT) 152 153 /* MD conversion macros */ 154 #define vax_btoc(x) (((unsigned)(x) + VAX_PGOFSET) >> VAX_PGSHIFT) 155 #define vax_btop(x) (((unsigned)(x)) >> VAX_PGSHIFT) 156 157 /* 158 * Map a ``block device block'' to a file system block. 159 * This should be device dependent, and will be if we 160 * add an entry to cdevsw/bdevsw for that purpose. 161 * For now though just use DEV_BSIZE. 162 */ 163 164 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 165 166 #ifdef _KERNEL 167 #ifndef lint 168 #define splx(reg) \ 169 ({ \ 170 register int val; \ 171 __asm __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \ 172 : "&=g" (val) \ 173 : "g" (reg)); \ 174 val; \ 175 }) 176 177 #define _splraise(reg) \ 178 ({ \ 179 register int val; \ 180 __asm __volatile ("mfpr $0x12,%0" \ 181 : "&=g" (val) \ 182 : ); \ 183 if ((reg) > val) { \ 184 __asm __volatile ("mtpr %0,$0x12" \ 185 : \ 186 : "g" (reg)); \ 187 } \ 188 val; \ 189 }) 190 #endif 191 192 #define spl0() splx(0) /* IPL0 */ 193 #define spllowersoftclock() splx(8) /* IPL08 */ 194 #define splsoftclock() _splraise(8) /* IPL08 */ 195 #define splsoftnet() _splraise(0xc) /* IPL0C */ 196 #define splddb() _splraise(0xf) /* IPL0F */ 197 #define splbio() _splraise(0x15) /* IPL15 */ 198 #define splnet() _splraise(0x15) /* IPL15 */ 199 #define spltty() _splraise(0x15) /* IPL15 */ 200 #define splimp() _splraise(0x17) /* IPL17 */ 201 #define splclock() _splraise(0x18) /* IPL18 */ 202 #define splhigh() _splraise(0x1f) /* IPL1F */ 203 #define splstatclock() splclock() 204 205 /* These are better to use when playing with VAX buses */ 206 #define spl4() splx(0x14) 207 #define spl5() splx(0x15) 208 #define spl6() splx(0x16) 209 #define spl7() splx(0x17) 210 211 #define vmapbuf(p,q) 212 #define vunmapbuf(p,q) 213 214 /* Prototype needed for delay() */ 215 #ifndef _LOCORE 216 void delay __P((int)); 217 /* inline macros used inside kernel */ 218 #include <machine/macros.h> 219 #endif 220 221 #define DELAY(x) delay(x) 222 #endif /* _KERNEL */ 223 224 #endif /* _VAX_PARAM_H_ */ 225