1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1982, 1986, 1990 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. 9 * 10 * %sccs.include.redist.c% 11 * 12 * from: Utah $Hdr: machparam.h 1.11 89/08/14$ 13 * 14 * @(#)param.h 7.2 (Berkeley) 12/05/90 15 */ 16 17 /* 18 * Machine dependent constants for HP9000 series 300. 19 */ 20 #define MACHINE "hp300" 21 22 #ifndef BYTE_ORDER 23 #include <machine/endian.h> 24 #endif 25 26 #include <machine/machlimits.h> 27 28 #define NBPG 4096 /* bytes/page */ 29 #define PGOFSET (NBPG-1) /* byte offset into page */ 30 #define PGSHIFT 12 /* LOG2(NBPG) */ 31 #define NPTEPG (NBPG/(sizeof (struct pte))) 32 33 #define NBSEG (1024*NBPG) /* bytes/segment */ 34 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 35 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 36 37 #define KERNBASE 0x00000000 /* start of kernel virtual */ 38 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 39 40 #define DEV_BSIZE 512 41 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 42 #define BLKDEV_IOSIZE 2048 43 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 44 45 #define CLSIZE 1 46 #define CLSIZELOG2 0 47 48 #define SSIZE 1 /* initial stack size/NBPG */ 49 #define SINCR 1 /* increment of stack/NBPG */ 50 51 #define UPAGES 3 /* pages of u-area */ 52 53 /* 54 * Constants related to network buffer management. 55 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 56 * on machines that exchange pages of input or output buffers with mbuf 57 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 58 * of the hardware page size. 59 */ 60 #define MSIZE 128 /* size of an mbuf */ 61 #define MCLBYTES 1024 62 #define MCLSHIFT 10 63 #define MCLOFSET (MCLBYTES - 1) 64 #ifndef NMBCLUSTERS 65 #ifdef GATEWAY 66 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 67 #else 68 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 69 #endif 70 #endif 71 72 /* 73 * Size of kernel malloc arena in CLBYTES-sized logical pages 74 */ 75 #ifndef NKMEMCLUSTERS 76 #define NKMEMCLUSTERS (512*1024/CLBYTES) 77 #endif 78 79 /* 80 * Some macros for units conversion 81 */ 82 /* Core clicks (4096 bytes) to segments and vice versa */ 83 #define ctos(x) (x) 84 #define stoc(x) (x) 85 86 /* Core clicks (4096 bytes) to disk blocks */ 87 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 88 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 89 #define dtob(x) ((x)<<DEV_BSHIFT) 90 91 /* clicks to bytes */ 92 #define ctob(x) ((x)<<PGSHIFT) 93 94 /* bytes to clicks */ 95 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 96 97 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 98 ((unsigned)(bytes) >> DEV_BSHIFT) 99 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 100 ((unsigned)(db) << DEV_BSHIFT) 101 102 /* 103 * Map a ``block device block'' to a file system block. 104 * This should be device dependent, and will be if we 105 * add an entry to cdevsw/bdevsw for that purpose. 106 * For now though just use DEV_BSIZE. 107 */ 108 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 109 110 /* 111 * Mach derived conversion macros 112 */ 113 #define hp300_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1)) 114 #define hp300_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1)) 115 #define hp300_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 116 #define hp300_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 117 #define hp300_btos(x) ((unsigned)(x) >> SEGSHIFT) 118 #define hp300_stob(x) ((unsigned)(x) << SEGSHIFT) 119 #define hp300_btop(x) ((unsigned)(x) >> PGSHIFT) 120 #define hp300_ptob(x) ((unsigned)(x) << PGSHIFT) 121 122 /* 123 * Macros to decode processor status word. 124 */ 125 #define USERMODE(ps) (((ps) & PSL_S) == 0) 126 #define BASEPRI(ps) (((ps) & PSL_IPL7) == 0) 127 128 #ifdef KERNEL 129 #ifndef LOCORE 130 int cpuspeed; 131 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 132 #endif 133 134 #else KERNEL 135 #define DELAY(n) { register int N = (n); while (--N > 0); } 136 #endif KERNEL 137 138 #ifdef HPUXCOMPAT 139 /* 140 * Constants/macros for HPUX multiple mapping of user address space. 141 * Pages in the first 256Mb are mapped in at every 256Mb segment. 142 */ 143 #define HPMMMASK 0xF0000000 144 #define ISHPMMADDR(v) \ 145 ((u.u_pcb.pcb_flags&PCB_HPUXMMAP) && ((unsigned)(v)&HPMMMASK) != HPMMMASK) 146 #define HPMMBASEADDR(v) ((unsigned)(v) & ~HPMMMASK) 147 #endif 148