1 /* $NetBSD: param.h,v 1.21 1996/07/20 17:58:21 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 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 #define USPACE (NBPG*UPAGES) 88 89 /* 90 * Constants related to network buffer management. 91 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 92 * on machines that exchange pages of input or output buffers with mbuf 93 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 94 * of the hardware page size. 95 */ 96 97 #ifndef MSIZE 98 #define MSIZE 128 /* size of an mbuf */ 99 #endif /* MSIZE */ 100 101 #ifndef MCLSHIFT 102 #define MCLSHIFT 10 /* convert bytes to m_buf clusters */ 103 #endif /* MCLSHIFT */ 104 #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ 105 #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ 106 107 #ifndef NMBCLUSTERS 108 #ifdef GATEWAY 109 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 110 #else 111 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 112 #endif /* GATEWAY */ 113 #endif /* NMBCLUSTERS */ 114 115 /* 116 * Size of kernel malloc arena in CLBYTES-sized logical pages 117 */ 118 119 #ifndef NKMEMCLUSTERS 120 #define NKMEMCLUSTERS (2048*1024/CLBYTES) 121 #endif 122 123 /* 124 * Some macros for units conversion 125 */ 126 127 /* pages ("clicks") to disk blocks */ 128 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 129 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 130 131 /* clicks to bytes */ 132 #define ctob(x) ((x) << PGSHIFT) 133 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 134 #define btop(x) (((unsigned)(x)) >> PGSHIFT) 135 136 /* bytes to disk blocks */ 137 #define btodb(x) ((x) >> DEV_BSHIFT) 138 #define dbtob(x) ((x) << DEV_BSHIFT) 139 140 /* 141 * Map a ``block device block'' to a file system block. 142 * This should be device dependent, and will be if we 143 * add an entry to cdevsw/bdevsw for that purpose. 144 * For now though just use DEV_BSIZE. 145 */ 146 147 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 148 149 #define splx(reg) \ 150 ({ \ 151 register int val; \ 152 asm __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \ 153 : "&=g" (val) \ 154 : "g" (reg)); \ 155 val; \ 156 }) 157 158 159 #define spl0() splx(0) /* IPL0 */ 160 #define splsoftclock() splx(8) /* IPL08 */ 161 #define splsoftnet() splx(0xc) /* IPL0C */ 162 #define splddb() splx(0xf) /* IPL0F */ 163 #define splbio() splx(0x15) /* IPL15 */ 164 #define splnet() splx(0x15) /* IPL15 */ 165 #define spltty() splx(0x15) /* IPL15 */ 166 #define splimp() splx(0x17) /* IPL17 */ 167 #define splclock() splx(0x18) /* IPL18 */ 168 #define splhigh() splx(0x1f) /* IPL1F */ 169 #define splstatclock() splclock() 170 171 /* These are better to use when playing with VAX buses */ 172 #define spl4() splx(0x14) 173 #define spl5() splx(0x15) 174 #define spl6() splx(0x16) 175 #define spl7() splx(0x17) 176 177 #define ovbcopy(x,y,z) bcopy(x,y,z) 178 179 #if !defined(VAX410) && !defined(VAX43) 180 #define vmapbuf(p,q) 181 #define vunmapbuf(p,q) 182 #endif 183 184 /* Prototype needed for delay() */ 185 #ifndef _LOCORE 186 void delay __P((int)); 187 #endif 188 189 #define DELAY(x) delay(x) 190 191 #endif /* _VAX_PARAM_H_ */ 192