1 /* $NetBSD: param.h,v 1.8 1995/03/18 07:23:44 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 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 * from: Utah Hdr: machparam.h 1.11 89/08/14 41 * 42 * @(#)param.h 8.1 (Berkeley) 6/10/93 43 */ 44 45 /* 46 * Machine dependent constants for DEC Station 3100. 47 */ 48 #define MACHINE "pmax" 49 #define MACHINE_ARCH "mips" 50 #define MID_MACHINE MID_PMAX 51 52 /* 53 * Round p (pointer or byte index) up to a correctly-aligned value for all 54 * data types (int, long, ...). The result is u_int and must be cast to 55 * any desired pointer type. 56 */ 57 #define ALIGNBYTES 7 58 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 59 60 #define NBPG 4096 /* bytes/page */ 61 #define PGOFSET (NBPG-1) /* byte offset into page */ 62 #define PGSHIFT 12 /* LOG2(NBPG) */ 63 #define NPTEPG (NBPG/4) 64 65 #define NBSEG 0x400000 /* bytes/segment */ 66 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 67 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 68 69 #define KERNBASE 0x80000000 /* start of kernel virtual */ 70 #define KERNTEXTOFF 0x80030000 /* start of kernel text for kvm_mkdb */ 71 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 72 73 #define DEV_BSIZE 512 74 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 75 #define BLKDEV_IOSIZE 2048 76 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 77 78 #define CLSIZE 1 79 #define CLSIZELOG2 0 80 81 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 82 #define SSIZE 1 /* initial stack size/NBPG */ 83 #define SINCR 1 /* increment of stack/NBPG */ 84 85 #define UPAGES 2 /* pages of u-area */ 86 #define UADDR 0xffffd000 /* address of u */ 87 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 88 #define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 89 #define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 90 91 /* 92 * Constants related to network buffer management. 93 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 94 * on machines that exchange pages of input or output buffers with mbuf 95 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 96 * of the hardware page size. 97 */ 98 #define MSIZE 128 /* size of an mbuf */ 99 #define MCLBYTES 2048 /* enough for whole Ethernet packet */ 100 #define MCLSHIFT 10 101 #define MCLOFSET (MCLBYTES - 1) 102 #ifndef NMBCLUSTERS 103 #ifdef GATEWAY 104 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 105 #else 106 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 107 #endif 108 #endif 109 110 /* 111 * Size of kernel malloc arena in CLBYTES-sized logical pages 112 */ 113 #ifndef NKMEMCLUSTERS 114 #define NKMEMCLUSTERS (512*1024/CLBYTES) 115 #endif 116 117 /* pages ("clicks") (4096 bytes) to disk blocks */ 118 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 119 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 120 #define dtob(x) ((x)<<DEV_BSHIFT) 121 122 /* pages to bytes */ 123 #define ctob(x) ((x)<<PGSHIFT) 124 125 /* bytes to pages */ 126 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 127 128 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 129 ((bytes) >> DEV_BSHIFT) 130 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 131 ((db) << DEV_BSHIFT) 132 133 /* 134 * Map a ``block device block'' to a file system block. 135 * This should be device dependent, and should use the bsize 136 * field from the disk label. 137 * For now though just use DEV_BSIZE. 138 */ 139 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 140 141 /* 142 * Mach derived conversion macros 143 */ 144 #define pmax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 145 #define pmax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 146 #define pmax_btop(x) ((unsigned)(x) >> PGSHIFT) 147 #define pmax_ptob(x) ((unsigned)(x) << PGSHIFT) 148 149 #ifdef KERNEL 150 #ifndef LOCORE 151 extern int (*Mach_splnet)(), (*Mach_splbio)(), (*Mach_splimp)(), 152 (*Mach_spltty)(), (*Mach_splclock)(), (*Mach_splstatclock)(); 153 #define splnet() ((*Mach_splnet)()) 154 #define splbio() ((*Mach_splbio)()) 155 #define splimp() ((*Mach_splimp)()) 156 #define spltty() ((*Mach_spltty)()) 157 #define splclock() ((*Mach_splclock)()) 158 #define splstatclock() ((*Mach_splstatclock)()) 159 extern int cpuspeed; 160 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 161 #endif 162 163 #else /* !KERNEL */ 164 #define DELAY(n) { register int N = (n); while (--N > 0); } 165 #endif /* !KERNEL */ 166