1 /* $NetBSD: param.h,v 1.31 2025/04/20 22:32:49 riastradh 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 #ifdef _KERNEL 29 #include <machine/cpu.h> 30 #ifdef _KERNEL_OPT 31 #include "opt_param.h" 32 #endif 33 #endif 34 35 /* 36 * Machine dependent constants for PA-RISC. 37 */ 38 39 #define _MACHINE hppa 40 #define MACHINE "hppa" 41 #define _MACHINE_ARCH hppa 42 #define MACHINE_ARCH "hppa" 43 #define MID_MACHINE MID_HPPA 44 45 #define PGSHIFT 12 /* LOG2(NBPG) */ 46 #define NBPG (1 << PGSHIFT) /* bytes/page */ 47 #define PGOFSET (NBPG - 1) /* byte offset into page */ 48 49 #define SEGSHIFT (PGSHIFT + (PGSHIFT-PTESHIFT)) /* LOG2(NBSEG) */ 50 #define NBSEG (1 << SEGSHIFT) /* bytes/segment (quadrant) */ 51 #define SEGOFSET (NBSEG - 1) /* byte offset into segment */ 52 53 #define KERNBASE 0x00000000 /* start of kernel virtual */ 54 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 55 56 #define SSIZE (1) /* initial stack size/NBPG */ 57 #define SINCR (1) /* increment of stack/NBPG */ 58 59 #ifdef DIAGNOSTIC 60 #define UPAGES 5 /* pages of u-area + redzone */ 61 #else 62 #define UPAGES 4 /* pages of u-area */ 63 #endif 64 #define USPACE (UPAGES * NBPG) /* pages for user struct and kstack */ 65 66 #ifndef MSGBUFSIZE 67 #define MSGBUFSIZE (4 * NBPG) /* default message buffer size */ 68 #endif 69 70 /* 71 * Constants related to network buffer management. 72 * MCLBYTES must be no larger than the software page size, and, 73 * on machines that exchange pages of input or output buffers with mbuf 74 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 75 * of the hardware page size. 76 */ 77 #define MSIZE 256 /* size of an mbuf */ 78 #define MCLSHIFT 11 79 #define MCLBYTES (1 << MCLSHIFT) /* large enough for ether MTU */ 80 #define MCLOFSET (MCLBYTES - 1) 81 82 #define STACK_ALIGNBYTES (64 - 1) 83 84 /* 85 * Size of kernel malloc arena in logical pages 86 */ 87 #define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 88 #define NKMEMPAGES_MAX_DEFAULT ((256 * 1024 * 1024) >> PAGE_SHIFT) 89 90 /* 91 * Mach derived conversion macros 92 */ 93 94 #define btop(x) ((unsigned long)(x) >> PGSHIFT) 95 #define ptob(x) ((unsigned long)(x) << PGSHIFT) 96 97 /* Default audio blocksize in msec. See sys/dev/audio/audio.c */ 98 #if defined(_KERNEL) 99 #define __AUDIO_BLK_MS (40) 100 #endif 101