param.h revision 1.21
1/* $NetBSD: param.h,v 1.21 2010/02/08 19:02:31 joerg Exp $ */ 2 3/*- 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#ifndef _POWERPC_PARAM_H 35#define _POWERPC_PARAM_H 36 37#ifdef _KERNEL 38#if defined(_KERNEL_OPT) 39#include "opt_ppcarch.h" 40#endif 41#ifndef _LOCORE 42#include <machine/cpu.h> 43#endif /* _LOCORE */ 44#endif 45 46/* 47 * Machine dependent constants for PowerPC (32-bit only currently) 48 */ 49#ifndef MACHINE 50#define MACHINE "powerpc" 51#endif 52#define MACHINE_ARCH "powerpc" 53#define MID_MACHINE MID_POWERPC 54 55#define ALIGNBYTES (sizeof(double) - 1) 56#define ALIGN(p) (((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES) 57#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 58 59#ifdef PPC_IBM4XX 60#define PGSHIFT 14 /* Use 16KB to reduce TLB thrashing */ 61#define UPAGES 1 62#else 63#define PGSHIFT 12 64#define UPAGES 4 65#endif 66#define NBPG (1 << PGSHIFT) /* Page size */ 67#define PGOFSET (NBPG - 1) 68 69#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 70#define DEV_BSIZE (1 << DEV_BSHIFT) 71#define BLKDEV_IOSIZE NBPG 72#ifndef MAXPHYS 73#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 74#endif 75 76#define USPACE (UPAGES * NBPG) 77 78#ifndef MSGBUFSIZE 79#define MSGBUFSIZE (2*NBPG) /* default message buffer size */ 80#endif 81 82#ifndef KERNBASE 83#define KERNBASE 0x100000 84#endif 85 86/* 87 * Constants related to network buffer management. 88 * MCLBYTES must be no larger than NBPG (the software page size), and, 89 * on machines that exchange pages of input or output buffers with mbuf 90 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 91 * of the hardware page size. 92 */ 93#ifndef MSIZE 94#define MSIZE 256 /* size of an mbuf */ 95#endif 96#ifndef MCLSHIFT 97#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 98#endif 99#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 100 101/* 102 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 103 * logical pages. 104 */ 105#ifndef NKMEMPAGES_MIN_DEFAULT 106#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 107#endif 108#ifndef NKMEMPAGES_MAX_DEFAULT 109#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 110#endif 111 112#endif /* _POWERPC_PARAM_H_ */ 113