param.h revision 1.31
1 /* $NetBSD: param.h,v 1.31 1998/08/21 13:42:52 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 9 /* LOG2(NBPG) */ 70 #define NBPG (1<<PGSHIFT) /* (1 << PGSHIFT) bytes/page */ 71 #define PGOFSET (NBPG-1) /* byte offset into page */ 72 #define NPTEPG (NBPG/(sizeof (struct pte))) 73 74 #define KERNBASE 0x80000000 /* start of kernel virtual */ 75 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 76 77 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 78 #define DEV_BSIZE (1 << DEV_BSHIFT) 79 80 #define BLKDEV_IOSIZE 2048 81 #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ 82 #define MAXBSIZE 0x4000 /* max FS block size - XXX */ 83 84 #define CLSIZELOG2 3 85 #define CLSIZE 8 86 87 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 88 #define SSIZE 4 /* initial stack size/NBPG */ 89 #define SINCR 4 /* increment of stack/NBPG */ 90 91 #define UPAGES 16 /* pages of u-area */ 92 #define USPACE (NBPG*UPAGES) 93 94 #ifndef MSGBUFSIZE 95 #define MSGBUFSIZE CLBYTES /* default message buffer size */ 96 #endif 97 98 /* 99 * Constants related to network buffer management. 100 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 101 * on machines that exchange pages of input or output buffers with mbuf 102 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 103 * of the hardware page size. 104 */ 105 106 #ifndef MSIZE 107 #define MSIZE 128 /* size of an mbuf */ 108 #endif /* MSIZE */ 109 110 #ifndef MCLSHIFT 111 #define MCLSHIFT 10 /* convert bytes to m_buf clusters */ 112 #endif /* MCLSHIFT */ 113 #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ 114 #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ 115 116 #ifndef NMBCLUSTERS 117 118 #if defined(_KERNEL) && !defined(_LKM) 119 #include "opt_gateway.h" 120 #endif /* _KERNEL && ! _LKM */ 121 122 #ifdef GATEWAY 123 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 124 #else 125 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 126 #endif /* GATEWAY */ 127 #endif /* NMBCLUSTERS */ 128 129 /* 130 * Size of kernel malloc arena in CLBYTES-sized logical pages 131 */ 132 133 #ifndef NKMEMCLUSTERS 134 #define NKMEMCLUSTERS (4096*1024/CLBYTES) 135 #endif 136 137 /* 138 * Some macros for units conversion 139 */ 140 141 /* pages ("clicks") to disk blocks */ 142 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 143 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 144 145 /* clicks to bytes */ 146 #define ctob(x) ((x) << PGSHIFT) 147 #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) 148 #define btop(x) (((unsigned)(x)) >> PGSHIFT) 149 150 /* bytes to disk blocks */ 151 #define btodb(x) ((x) >> DEV_BSHIFT) 152 #define dbtob(x) ((x) << DEV_BSHIFT) 153 154 /* 155 * Map a ``block device block'' to a file system block. 156 * This should be device dependent, and will be if we 157 * add an entry to cdevsw/bdevsw for that purpose. 158 * For now though just use DEV_BSIZE. 159 */ 160 161 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 162 163 #define splx(reg) \ 164 ({ \ 165 register int val; \ 166 __asm__ __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \ 167 : "&=g" (val) \ 168 : "g" (reg)); \ 169 val; \ 170 }) 171 172 173 #define spl0() splx(0) /* IPL0 */ 174 #define splsoftclock() splx(8) /* IPL08 */ 175 #define splsoftnet() splx(0xc) /* IPL0C */ 176 #define splddb() splx(0xf) /* IPL0F */ 177 #define splbio() splx(0x15) /* IPL15 */ 178 #define splnet() splx(0x15) /* IPL15 */ 179 #define spltty() splx(0x15) /* IPL15 */ 180 #define splimp() splx(0x17) /* IPL17 */ 181 #define splclock() splx(0x18) /* IPL18 */ 182 #define splhigh() splx(0x1f) /* IPL1F */ 183 #define splstatclock() splclock() 184 185 /* These are better to use when playing with VAX buses */ 186 #define spl4() splx(0x14) 187 #define spl5() splx(0x15) 188 #define spl6() splx(0x16) 189 #define spl7() splx(0x17) 190 191 /* #define ovbcopy(x,y,z) bcopy(x,y,z) */ 192 193 #if !defined(VAX410) && !defined(VAX43) 194 #define vmapbuf(p,q) 195 #define vunmapbuf(p,q) 196 #endif 197 198 #ifdef _KERNEL 199 /* Prototype needed for delay() */ 200 #ifndef _LOCORE 201 void delay __P((int)); 202 /* inline macros used inside kernel */ 203 #include <machine/macros.h> 204 #endif 205 206 #define DELAY(x) delay(x) 207 #endif /* _KERNEL */ 208 209 #endif /* _VAX_PARAM_H_ */ 210
Indexes created Wed Sep 24 15:09:51 GMT 2025