1 /* $NetBSD: param.h,v 1.13 2009/04/30 07:01:27 skrll 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_HPPA 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 #ifdef DIAGNOSTIC 71 #define UPAGES 5 /* pages of u-area + redzone */ 72 #else 73 #define UPAGES 4 /* pages of u-area */ 74 #endif 75 #define USPACE (UPAGES * NBPG) /* pages for user struct and kstack */ 76 77 #ifndef MSGBUFSIZE 78 #define MSGBUFSIZE 2*NBPG /* default message buffer size */ 79 #endif 80 81 /* 82 * Constants related to network buffer management. 83 * MCLBYTES must be no larger than the software page size, and, 84 * on machines that exchange pages of input or output buffers with mbuf 85 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 86 * of the hardware page size. 87 */ 88 #define MSIZE 256 /* size of an mbuf */ 89 #define MCLSHIFT 11 90 #define MCLBYTES (1 << MCLSHIFT) /* large enough for ether MTU */ 91 #define MCLOFSET (MCLBYTES - 1) 92 #ifndef NMBCLUSTERS 93 #define NMBCLUSTERS (2048) /* cl map size: 1MB */ 94 #endif 95 96 /* 97 * Size of kernel malloc arena in logical pages 98 */ 99 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 100 #define NKMEMPAGES_MAX_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 101 102 /* 103 * Mach derived conversion macros 104 */ 105 106 #define btop(x) ((unsigned long)(x) >> PGSHIFT) 107 #define ptob(x) ((unsigned long)(x) << PGSHIFT) 108