1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department and Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: Utah Hdr: machparam.h 1.11 89/08/14 39 * 40 * 41 * from: @(#)param.h 8.1 (Berkeley) 6/10/93 42 * $Id: param.h,v 1.5 1994/08/23 19:13:54 glass Exp $ 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 BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 71 72 #define DEV_BSIZE 512 73 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 74 #define BLKDEV_IOSIZE 2048 75 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 76 77 #define CLSIZE 1 78 #define CLSIZELOG2 0 79 80 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 81 #define SSIZE 1 /* initial stack size/NBPG */ 82 #define SINCR 1 /* increment of stack/NBPG */ 83 84 #define UPAGES 2 /* pages of u-area */ 85 #define UADDR 0xffffd000 /* address of u */ 86 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 87 #define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 88 #define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 89 90 /* 91 * Constants related to network buffer management. 92 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 93 * on machines that exchange pages of input or output buffers with mbuf 94 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 95 * of the hardware page size. 96 */ 97 #define MSIZE 128 /* size of an mbuf */ 98 #define MCLBYTES 1024 99 #define MCLSHIFT 10 100 #define MCLOFSET (MCLBYTES - 1) 101 #ifndef NMBCLUSTERS 102 #ifdef GATEWAY 103 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 104 #else 105 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 106 #endif 107 #endif 108 109 /* 110 * Size of kernel malloc arena in CLBYTES-sized logical pages 111 */ 112 #ifndef NKMEMCLUSTERS 113 #define NKMEMCLUSTERS (512*1024/CLBYTES) 114 #endif 115 116 /* pages ("clicks") (4096 bytes) to disk blocks */ 117 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 118 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 119 #define dtob(x) ((x)<<DEV_BSHIFT) 120 121 /* pages to bytes */ 122 #define ctob(x) ((x)<<PGSHIFT) 123 124 /* bytes to pages */ 125 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 126 127 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 128 ((unsigned)(bytes) >> DEV_BSHIFT) 129 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 130 ((unsigned)(db) << DEV_BSHIFT) 131 132 /* 133 * Map a ``block device block'' to a file system block. 134 * This should be device dependent, and should use the bsize 135 * field from the disk label. 136 * For now though just use DEV_BSIZE. 137 */ 138 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 139 140 /* 141 * Mach derived conversion macros 142 */ 143 #define pmax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 144 #define pmax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 145 #define pmax_btop(x) ((unsigned)(x) >> PGSHIFT) 146 #define pmax_ptob(x) ((unsigned)(x) << PGSHIFT) 147 148 #ifdef KERNEL 149 #ifndef LOCORE 150 extern int (*Mach_splnet)(), (*Mach_splbio)(), (*Mach_splimp)(), 151 (*Mach_spltty)(), (*Mach_splclock)(), (*Mach_splstatclock)(); 152 #define splnet() ((*Mach_splnet)()) 153 #define splbio() ((*Mach_splbio)()) 154 #define splimp() ((*Mach_splimp)()) 155 #define spltty() ((*Mach_spltty)()) 156 #define splclock() ((*Mach_splclock)()) 157 #define splstatclock() ((*Mach_splstatclock)()) 158 extern int cpuspeed; 159 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 160 #endif 161 162 #else /* !KERNEL */ 163 #define DELAY(n) { register int N = (n); while (--N > 0); } 164 #endif /* !KERNEL */ 165