1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1992 OMRON Corporation. 4 * Copyright (c) 1982, 1986, 1990, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * %sccs.include.redist.c% 12 * 13 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 14 * from: hp300/include/param.h 7.13 (Berkeley) 12/27/92 15 * 16 * @(#)param.h 8.1 (Berkeley) 06/10/93 17 */ 18 19 /* 20 * Machine dependent constants for LUNA taken from: 21 * Param.h for HP9000 series 300. 22 */ 23 #define MACHINE "luna68k" 24 25 /* 26 * Round p (pointer or byte index) up to a correctly-aligned value 27 * for all data types (int, long, ...). The result is u_int and 28 * must be cast to any desired pointer type. 29 */ 30 #define ALIGNBYTES 3 31 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 32 33 #define NBPG 4096 /* bytes/page */ 34 #define PGOFSET (NBPG-1) /* byte offset into page */ 35 #define PGSHIFT 12 /* LOG2(NBPG) */ 36 #define NPTEPG (NBPG/(sizeof (struct pte))) 37 38 #define NBSEG 0x400000 /* bytes/segment */ 39 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 40 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 41 42 #define KERNBASE 0x00000000 /* start of kernel virtual */ 43 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 44 45 #define DEV_BSIZE 512 46 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 47 #define BLKDEV_IOSIZE 2048 48 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 49 50 #define CLSIZE 1 51 #define CLSIZELOG2 0 52 53 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 54 #define SSIZE 1 /* initial stack size/NBPG */ 55 #define SINCR 1 /* increment of stack/NBPG */ 56 57 #define UPAGES 2 /* pages of u-area */ 58 59 /* 60 * Constants related to network buffer management. 61 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 62 * on machines that exchange pages of input or output buffers with mbuf 63 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 64 * of the hardware page size. 65 */ 66 #define MSIZE 128 /* size of an mbuf */ 67 #define MCLBYTES 2048 /* large enough for ether MTU */ 68 #define MCLSHIFT 11 69 #define MCLOFSET (MCLBYTES - 1) 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 (2048*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)+(NBPG-1))>>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 /* 110 * Mach derived conversion macros 111 */ 112 #define luna_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 113 #define luna_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 114 #define luna_btop(x) ((unsigned)(x) >> PGSHIFT) 115 #define luna_ptob(x) ((unsigned)(x) << PGSHIFT) 116 117 /* 118 * spl functions; all but spl0 are done in-line 119 */ 120 #include <machine/psl.h> 121 122 #define _spl(s) \ 123 ({ \ 124 register int _spl_r; \ 125 \ 126 asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 127 "&=d" (_spl_r) : "di" (s)); \ 128 _spl_r; \ 129 }) 130 131 /* spl0 requires checking for software interrupts */ 132 #define spl1() _spl(PSL_S|PSL_IPL1) 133 #define spl2() _spl(PSL_S|PSL_IPL2) 134 #define spl3() _spl(PSL_S|PSL_IPL3) 135 #define spl4() _spl(PSL_S|PSL_IPL4) 136 #define spl5() _spl(PSL_S|PSL_IPL5) 137 #define spl6() _spl(PSL_S|PSL_IPL6) 138 #define spl7() _spl(PSL_S|PSL_IPL7) 139 140 #define splsoftclock() spl1() 141 #define splnet() spl1() 142 #define splbio() spl5() 143 #define splimp() spl5() 144 #define spltty() spl6() 145 #define splclock() spl5() 146 #define splstatclock() spl5() 147 #define splvm() spl6() 148 #define splhigh() spl7() 149 #define splsched() spl7() 150 151 /* watch out for side effects */ 152 #define splx(s) (s & PSL_IPL ? _spl(s) : spl0()) 153 154 #ifdef KERNEL 155 #ifndef LOCORE 156 int cpuspeed; 157 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 158 #endif 159 160 #else 161 #define DELAY(n) { register int N = (n); while (--N > 0); } 162 #endif 163