1 /* $NetBSD: param.h,v 1.32 1997/04/14 02:28:51 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: machparam.h 1.16 92/12/20$ 41 * 42 * @(#)param.h 8.1 (Berkeley) 6/10/93 43 */ 44 45 /* 46 * Machine dependent constants for HP9000 series 300. 47 */ 48 #define _MACHINE hp300 49 #define MACHINE "hp300" 50 #define _MACHINE_ARCH m68k 51 #define MACHINE_ARCH "m68k" 52 #define MID_MACHINE MID_M68K 53 54 /* 55 * Interrupt glue. 56 */ 57 #include <machine/intr.h> 58 59 /* 60 * Round p (pointer or byte index) up to a correctly-aligned value for all 61 * data types (int, long, ...). The result is u_int and must be cast to 62 * any desired pointer type. 63 * 64 * ALIGNED_POINTER is a boolean macro that checks whether an address 65 * is valid to fetch data elements of type t from on this architecture. 66 * This does not reflect the optimal alignment, just the possibility 67 * (within reasonable limits). 68 * 69 */ 70 #define ALIGNBYTES (sizeof(int) - 1) 71 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 72 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 73 74 #define PGSHIFT 12 /* LOG2(NBPG) */ 75 #define NBPG (1 << PGSHIFT) /* bytes/page */ 76 #define PGOFSET (NBPG-1) /* byte offset into page */ 77 #define NPTEPG (NBPG/(sizeof (pt_entry_t))) 78 79 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 80 #define NBSEG (1 << SEGSHIFT) /* bytes/segment */ 81 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 82 83 #define KERNBASE 0x00000000 /* start of kernel virtual */ 84 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 85 86 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 87 #define DEV_BSIZE (1 << DEV_BSHIFT) 88 #define BLKDEV_IOSIZE 2048 89 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 90 91 #define CLSIZELOG2 0 92 #define CLSIZE (1 << CLSIZELOG2) 93 94 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 95 #define SSIZE 1 /* initial stack size/NBPG */ 96 #define SINCR 1 /* increment of stack/NBPG */ 97 #define UPAGES 2 /* pages of u-area */ 98 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 99 100 /* 101 * Constants related to network buffer management. 102 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 103 * on machines that exchange pages of input or output buffers with mbuf 104 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 105 * of the hardware page size. 106 */ 107 #define MSIZE 128 /* size of an mbuf */ 108 #define MCLSHIFT 11 109 #define MCLBYTES (1 << MCLSHIFT) /* large enough for ether MTU */ 110 #define MCLOFSET (MCLBYTES - 1) 111 112 #ifndef NMBCLUSTERS 113 #ifdef GATEWAY 114 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 115 #else 116 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 117 #endif 118 #endif 119 120 /* 121 * Size of kernel malloc arena in CLBYTES-sized logical pages 122 */ 123 #ifndef NKMEMCLUSTERS 124 #define NKMEMCLUSTERS (2048 * 1024 / CLBYTES) 125 #endif 126 127 /* pages ("clicks") to disk blocks */ 128 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 129 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 130 131 /* pages to bytes */ 132 #define ctob(x) ((x) << PGSHIFT) 133 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 134 135 /* bytes to disk blocks */ 136 #define dbtob(x) ((x) << DEV_BSHIFT) 137 #define btodb(x) ((x) >> DEV_BSHIFT) 138 139 /* 140 * Map a ``block device block'' to a file system block. 141 * This should be device dependent, and should use the bsize 142 * field from the disk label. 143 * For now though just use DEV_BSIZE. 144 */ 145 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 146 147 /* 148 * Mach derived conversion macros 149 */ 150 #define hp300_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET) 151 #define hp300_trunc_page(x) ((unsigned)(x) & ~PGOFSET) 152 #define hp300_btop(x) ((unsigned)(x) >> PGSHIFT) 153 #define hp300_ptob(x) ((unsigned)(x) << PGSHIFT) 154 155 #if defined(_KERNEL) && !defined(_LOCORE) 156 #define delay(us) _delay((us) << 8) 157 #define DELAY(us) delay(us) 158 159 void _delay __P((u_int)); 160 #endif /* _KERNEL && !_LOCORE */ 161 162 #ifdef COMPAT_HPUX 163 /* 164 * Constants/macros for HPUX multiple mapping of user address space. 165 * Pages in the first 256Mb are mapped in at every 256Mb segment. 166 */ 167 #define HPMMMASK 0xF0000000 168 #define ISHPMMADDR(v) \ 169 ((curproc->p_md.md_flags & MDP_HPUXMMAP) && \ 170 ((unsigned)(v) & HPMMMASK) && \ 171 ((unsigned)(v) & HPMMMASK) != HPMMMASK) 172 #define HPMMBASEADDR(v) \ 173 ((unsigned)(v) & ~HPMMMASK) 174 #endif 175