param.h revision 1.30
1 /* $NetBSD: param.h,v 1.30 1998/06/20 18:47:33 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 #include <machine/macros.h> 44 #include <machine/psl.h> 45 46 /* 47 * Machine dependent constants for VAX. 48 */ 49 50 #define _MACHINE vax 51 #define MACHINE "vax" 52 #define _MACHINE_ARCH vax 53 #define MACHINE_ARCH "vax" 54 #define MID_MACHINE MID_VAX 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 * ALIGNED_POINTER is a boolean macro that checks whether an address 62 * is valid to fetch data elements of type t from on this architecture. 63 * This does not reflect the optimal alignment, just the possibility 64 * (within reasonable limits). 65 * 66 */ 67 68 #define ALIGNBYTES (sizeof(int) - 1) 69 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 70 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 71 72 #define PGSHIFT 9 /* LOG2(NBPG) */ 73 #define NBPG (1<<PGSHIFT) /* (1 << PGSHIFT) bytes/page */ 74 #define PGOFSET (NBPG-1) /* byte offset into page */ 75 #define NPTEPG (NBPG/(sizeof (struct pte))) 76 77 #define KERNBASE 0x80000000 /* start of kernel virtual */ 78 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 79 80 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 81 #define DEV_BSIZE (1 << DEV_BSHIFT) 82 83 #define BLKDEV_IOSIZE 2048 84 #define MAXPHYS (63 * 1024) /* max raw I/O transfer size */ 85 #define MAXBSIZE 0x4000 /* max FS block size - XXX */ 86 87 #define CLSIZELOG2 1 88 #define CLSIZE 2 89 90 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 91 #define SSIZE 4 /* initial stack size/NBPG */ 92 #define SINCR 4 /* increment of stack/NBPG */ 93 94 #define UPAGES 16 /* pages of u-area */ 95 #define USPACE (NBPG*UPAGES) 96 97 #ifndef MSGBUFSIZE 98 #define MSGBUFSIZE (CLBYTES * 4) /* default message buffer size */ 99 #endif 100 101 /* 102 * Constants related to network buffer management. 103 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 104 * on machines that exchange pages of input or output buffers with mbuf 105 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 106 * of the hardware page size. 107 */ 108 109 #ifndef MSIZE 110 #define MSIZE 128 /* size of an mbuf */ 111 #endif /* MSIZE */ 112 113 #ifndef MCLSHIFT 114 #define MCLSHIFT 10 /* convert bytes to m_buf clusters */ 115 #endif /* MCLSHIFT */ 116 #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ 117 #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ 118 119 #ifndef NMBCLUSTERS 120 121 #if defined(_KERNEL) && !defined(_LKM) 122 #include "opt_gateway.h" 123 #endif /* _KERNEL && ! _LKM */ 124 125 #ifdef GATEWAY 126 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 127 #else 128 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 129 #endif /* GATEWAY */ 130 #endif /* NMBCLUSTERS */ 131 132 /* 133 * Size of kernel malloc arena in CLBYTES-sized logical pages 134 */ 135 136 #ifndef NKMEMCLUSTERS 137 #define NKMEMCLUSTERS (4096*1024/CLBYTES) 138 #endif 139 140 /* 141 * Some macros for units conversion 142 */ 143 144 /* pages ("clicks") to disk blocks */ 145 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 146 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 147 148 /* clicks to bytes */ 149 #define ctob(x) ((x) << PGSHIFT) 150 #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) 151 #define btop(x) (((unsigned)(x)) >> PGSHIFT) 152 153 /* bytes to disk blocks */ 154 #define btodb(x) ((x) >> DEV_BSHIFT) 155 #define dbtob(x) ((x) << DEV_BSHIFT) 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 #define splx(reg) \ 167 ({ \ 168 register int val; \ 169 __asm__ __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \ 170 : "&=g" (val) \ 171 : "g" (reg)); \ 172 val; \ 173 }) 174 175 176 #define spl0() splx(0) /* IPL0 */ 177 #define splsoftclock() splx(8) /* IPL08 */ 178 #define splsoftnet() splx(0xc) /* IPL0C */ 179 #define splddb() splx(0xf) /* IPL0F */ 180 #define splbio() splx(0x15) /* IPL15 */ 181 #define splnet() splx(0x15) /* IPL15 */ 182 #define spltty() splx(0x15) /* IPL15 */ 183 #define splimp() splx(0x17) /* IPL17 */ 184 #define splclock() splx(0x18) /* IPL18 */ 185 #define splhigh() splx(0x1f) /* IPL1F */ 186 #define splstatclock() splclock() 187 188 /* These are better to use when playing with VAX buses */ 189 #define spl4() splx(0x14) 190 #define spl5() splx(0x15) 191 #define spl6() splx(0x16) 192 #define spl7() splx(0x17) 193 194 #define ovbcopy(x,y,z) bcopy(x,y,z) 195 196 #if !defined(VAX410) && !defined(VAX43) 197 #define vmapbuf(p,q) 198 #define vunmapbuf(p,q) 199 #endif 200 201 #ifdef _KERNEL 202 /* Prototype needed for delay() */ 203 #ifndef _LOCORE 204 void delay __P((int)); 205 #endif 206 207 #define DELAY(x) delay(x) 208 #endif /* _KERNEL */ 209 210 #endif /* _VAX_PARAM_H_ */ 211
Indexes created Tue Sep 23 20:09:58 GMT 2025