1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1992 The Regents of the University of California. 4 * 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 * %sccs.include.redist.c% 11 * 12 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 13 * 14 * @(#)param.h 7.5 (Berkeley) 05/28/92 15 */ 16 17 /* 18 * Machine dependent constants for DEC Station 3100. 19 */ 20 #define MACHINE "mips" 21 #define COFF 22 23 /* 24 * Round p (pointer or byte index) up to a correctly-aligned value for all 25 * data types (int, long, ...). The result is u_int and must be cast to 26 * any desired pointer type. 27 */ 28 #define ALIGNBYTES 3 29 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 30 31 #define NBPG 4096 /* bytes/page */ 32 #define PGOFSET (NBPG-1) /* byte offset into page */ 33 #define PGSHIFT 12 /* LOG2(NBPG) */ 34 #define NPTEPG (NBPG/4) 35 36 #define KERNBASE 0x80000000 /* start of kernel virtual */ 37 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 38 39 #define DEV_BSIZE 512 40 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 41 #define BLKDEV_IOSIZE 2048 42 #define MAXPHYS (24 * 1024) /* max raw I/O transfer size */ 43 44 #define CLSIZE 1 45 #define CLSIZELOG2 0 46 47 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 48 #define SSIZE 1 /* initial stack size/NBPG */ 49 #define SINCR 1 /* increment of stack/NBPG */ 50 51 #define UPAGES 2 /* pages of u-area */ 52 #define UADDR 0xffffd000 /* address of u */ 53 #define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 54 #define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 55 56 /* 57 * Constants related to network buffer management. 58 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 59 * on machines that exchange pages of input or output buffers with mbuf 60 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 61 * of the hardware page size. 62 */ 63 #define MSIZE 128 /* size of an mbuf */ 64 #define MCLBYTES 1024 65 #define MCLSHIFT 10 66 #define MCLOFSET (MCLBYTES - 1) 67 #ifndef NMBCLUSTERS 68 #ifdef GATEWAY 69 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 70 #else 71 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 72 #endif 73 #endif 74 75 /* 76 * Size of kernel malloc arena in CLBYTES-sized logical pages 77 */ 78 #ifndef NKMEMCLUSTERS 79 #define NKMEMCLUSTERS (512*1024/CLBYTES) 80 #endif 81 82 /* pages ("clicks") (4096 bytes) to disk blocks */ 83 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 84 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 85 #define dtob(x) ((x)<<DEV_BSHIFT) 86 87 /* pages to bytes */ 88 #define ctob(x) ((x)<<PGSHIFT) 89 90 /* bytes to pages */ 91 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 92 93 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 94 ((unsigned)(bytes) >> DEV_BSHIFT) 95 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 96 ((unsigned)(db) << DEV_BSHIFT) 97 98 /* 99 * Map a ``block device block'' to a file system block. 100 * This should be device dependent, and should use the bsize 101 * field from the disk label. 102 * For now though just use DEV_BSIZE. 103 */ 104 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 105 106 /* 107 * Mach derived conversion macros 108 */ 109 #define pmax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 110 #define pmax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 111 #define pmax_btop(x) ((unsigned)(x) >> PGSHIFT) 112 #define pmax_ptob(x) ((unsigned)(x) << PGSHIFT) 113 114 #ifdef DS3100 115 #define splnet() Mach_spl1() 116 #define splbio() Mach_spl0() 117 #define splimp() Mach_spl1() 118 #define spltty() Mach_spl2() 119 #define splclock() Mach_spl3() 120 #endif /* DS3100 */ 121 122 #ifdef DS5000 123 #define splnet() Mach_spl0() 124 #define splbio() Mach_spl0() 125 #define splimp() Mach_spl0() 126 #define spltty() Mach_spl0() 127 #define splclock() Mach_spl1() 128 #endif /* DS5000 */ 129 130 #ifdef KERNEL 131 #ifndef LOCORE 132 extern int cpuspeed; 133 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 134 #endif 135 136 #else /* !KERNEL */ 137 #define DELAY(n) { register int N = (n); while (--N > 0); } 138 #endif /* !KERNEL */ 139