1 /* $NetBSD: param.h,v 1.3 2003/04/28 23:16:19 bjh21 Exp $ */ 2 3 /* $OpenBSD: param.h,v 1.12 2001/07/06 02:07:41 provos Exp $ */ 4 5 /* 6 * Copyright (c) 1988-1994, The University of Utah and 7 * the Computer Systems Laboratory at the University of Utah (CSL). 8 * All rights reserved. 9 * 10 * Permission to use, copy, modify and distribute this software is hereby 11 * granted provided that (1) source code retains these copyright, permission, 12 * and disclaimer notices, and (2) redistributions including binaries 13 * reproduce the notices in supporting documentation, and (3) all advertising 14 * materials mentioning features or use of this software display the following 15 * acknowledgement: ``This product includes software developed by the 16 * Computer Systems Laboratory at the University of Utah.'' 17 * 18 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 19 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF 20 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 21 * 22 * CSL requests users of this software to return to csl-dist@cs.utah.edu any 23 * improvements that they make and grant CSL redistribution rights. 24 * 25 * Utah $Hdr: param.h 1.18 94/12/16$ 26 */ 27 28 #include <sys/featuretest.h> 29 30 #if defined(_NETBSD_SOURCE) 31 #include <machine/cpu.h> 32 #endif 33 34 /* 35 * Machine dependent constants for PA-RISC. 36 */ 37 38 #define _MACHINE_ARCH hppa 39 #define MACHINE_ARCH "hppa" 40 #define MID_MACHINE MID_HPUX800 41 42 /* 43 * Round p (pointer or byte index) up to a correctly-aligned value for all 44 * data types (int, long, ...). The result is u_int and must be cast to 45 * any desired pointer type. 46 */ 47 #define ALIGNBYTES 7 48 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) 49 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0) 50 51 #define PGSHIFT 12 /* LOG2(NBPG) */ 52 #define NBPG (1 << PGSHIFT) /* bytes/page */ 53 #define PGOFSET (NBPG-1) /* byte offset into page */ 54 55 #define SEGSHIFT (PGSHIFT + (PGSHIFT-PTESHIFT)) /* LOG2(NBSEG) */ 56 #define NBSEG (1 << SEGSHIFT) /* bytes/segment (quadrant) */ 57 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 58 59 #define KERNBASE 0x00000000 /* start of kernel virtual */ 60 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 61 62 #define DEV_BSIZE 512 63 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 64 #define BLKDEV_IOSIZE 2048 65 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 66 67 #define SSIZE (1) /* initial stack size/NBPG */ 68 #define SINCR (1) /* increment of stack/NBPG */ 69 70 #define UADDR 0x7ffe6000 /* u-area lives here */ 71 #define USHIFT (3) /* log2(UPAGES) */ 72 #define UPAGES (1<<USHIFT) /* pages of u-area */ 73 #define USPACE (UPAGES * NBPG) /* pages for user struct and kstack */ 74 75 #ifndef MSGBUFSIZE 76 #define MSGBUFSIZE 2*NBPG /* default message buffer size */ 77 #endif 78 79 /* 80 * Constants related to network buffer management. 81 * MCLBYTES must be no larger than the software page size, and, 82 * on machines that exchange pages of input or output buffers with mbuf 83 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 84 * of the hardware page size. 85 */ 86 #define MSIZE 256 /* size of an mbuf */ 87 #define MCLSHIFT 11 88 #define MCLBYTES (1 << MCLSHIFT) /* large enough for ether MTU */ 89 #define MCLOFSET (MCLBYTES - 1) 90 #ifndef NMBCLUSTERS 91 #define NMBCLUSTERS (2048) /* cl map size: 1MB */ 92 #endif 93 94 /* 95 * Size of kernel malloc arena in logical pages 96 */ 97 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 98 #define NKMEMPAGES_MAX_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 99 100 /* pages ("clicks") (4096 bytes) to disk blocks */ 101 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 102 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 103 104 /* pages to bytes */ 105 #define ctob(x) ((x)<<PGSHIFT) 106 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 107 108 #define btodb(bytes) ((unsigned)(bytes) >> DEV_BSHIFT) 109 #define dbtob(db) ((unsigned)(db) << DEV_BSHIFT) 110 111 /* 112 * Map a ``block device block'' to a file system block. 113 * This should be device dependent, and should use the bsize 114 * field from the disk label. 115 * For now though just use DEV_BSIZE. 116 */ 117 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 118 119 /* 120 * Mach derived conversion macros 121 */ 122 #define hppa_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1)) 123 #define hppa_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1)) 124 125 #define btop(x) ((unsigned long)(x) >> PGSHIFT) 126 #define ptob(x) ((unsigned long)(x) << PGSHIFT) 127 128 #ifdef _KERNEL 129 #ifdef COMPAT_HPUX 130 /* 131 * Constants/macros for HPUX multiple mapping of user address space. 132 * Pages in the first 256Mb are mapped in at every 256Mb segment. 133 */ 134 #define HPMMMASK 0xF0000000 135 #define ISHPMMADDR(v) 0 /* XXX ...jef */ 136 #define HPMMBASEADDR(v) ((unsigned)(v) & ~HPMMMASK) 137 #endif 138 139 #endif 140