1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 13 * 14 * %sccs.include.redist.c% 15 * 16 * @(#)param.h 8.1 (Berkeley) 06/11/93 17 * 18 * from: $Header: param.h,v 1.13 92/11/26 02:04:38 torek Exp $ (LBL) 19 */ 20 21 /* 22 * Machine dependent constants for Sun-4c (SPARCstation) 23 */ 24 #define MACHINE "sparc" 25 26 #ifdef KERNEL /* XXX */ 27 #include <machine/cpu.h> /* XXX */ 28 #endif /* XXX */ 29 30 /* 31 * Round p (pointer or byte index) up to a correctly-aligned value for 32 * the machine's strictest data type. The result is u_int and must be 33 * cast to any desired pointer type. 34 */ 35 #define ALIGNBYTES 7 36 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 37 38 #define NBPG 4096 /* bytes/page */ 39 #define PGOFSET (NBPG-1) /* byte offset into page */ 40 #define PGSHIFT 12 /* log2(NBPG) */ 41 42 #define KERNBASE 0xf8000000 /* start of kernel virtual space */ 43 #define KERNTEXTOFF 0xf8004000 /* start of kernel text */ 44 #define BTOPKERNBASE ((u_long)KERNBASE >> PG_SHIFT) 45 46 #define DEV_BSIZE 512 47 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 48 #define BLKDEV_IOSIZE 2048 49 #define MAXPHYS (64 * 1024) 50 51 #define CLSIZE 1 52 #define CLSIZELOG2 0 53 54 /* NOTE: SSIZE and UPAGES must be multiples of CLSIZE */ 55 #define SSIZE 1 /* initial stack size/NBPG */ 56 #define UPAGES 2 /* pages of u-area */ 57 58 /* 59 * Constants related to network buffer management. 60 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 61 * on machines that exchange pages of input or output buffers with mbuf 62 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 63 * of the hardware page size. 64 */ 65 #define MSIZE 128 /* size of an mbuf */ 66 #define MCLBYTES 2048 /* enough for whole Ethernet packet */ 67 #define MCLSHIFT 11 /* log2(MCLBYTES) */ 68 #define MCLOFSET (MCLBYTES - 1) 69 70 #ifndef NMBCLUSTERS 71 #ifdef GATEWAY 72 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 73 #else 74 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 75 #endif 76 #endif 77 78 /* 79 * Size of kernel malloc arena in CLBYTES-sized logical pages. 80 */ 81 #ifndef NKMEMCLUSTERS 82 #define NKMEMCLUSTERS (6 * 1024 * 1024 / CLBYTES) 83 #endif 84 85 /* pages ("clicks") (4096 bytes) to disk blocks */ 86 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 87 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 88 #define dtob(x) ((x) << DEV_BSHIFT) 89 90 /* pages to bytes */ 91 #define ctob(x) ((x) << PGSHIFT) 92 93 /* bytes to pages */ 94 #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) 95 96 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 97 ((unsigned)(bytes) >> DEV_BSHIFT) 98 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 99 ((unsigned)(db) << DEV_BSHIFT) 100 101 /* 102 * Map a ``block device block'' to a file system block. 103 * This should be device dependent, and should use the bsize 104 * field from the disk label. 105 * For now though just use DEV_BSIZE. 106 */ 107 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 108 109 #ifdef KERNEL 110 #ifndef LOCORE 111 #define DELAY(n) delay(n) 112 #endif 113 #else 114 #define DELAY(n) { register volatile int N = (n); while (--N > 0); } 115 #endif 116