param.h revision 1.30
1/* $NetBSD: param.h,v 1.30 2017/01/14 21:33:09 christos 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#endif 42 43/* 44 * Machine dependent constants for PowerPC 45 * For userland regardless of port, force MACHINE to be "powerpc" 46 */ 47#ifndef _KERNEL 48#undef MACHINE 49#endif 50 51#ifdef _LP64 52# ifndef MACHINE 53# define MACHINE "powerpc64" 54# endif 55# define MACHINE_ARCH "powerpc64" 56# define MID_MACHINE MID_POWERPC64 57#else 58# ifndef MACHINE 59# define MACHINE "powerpc" 60# endif 61# define MACHINE_ARCH "powerpc" 62# define MID_MACHINE MID_POWERPC 63#endif 64 65/* PowerPC-specific macro to align a stack pointer (downwards). */ 66#define STACK_ALIGNBYTES (16 - 1) /* AltiVec */ 67 68#ifdef PPC_IBM4XX 69#define PGSHIFT 14 /* Use 16KB to reduce TLB thrashing */ 70#define UPAGES 2 71#else 72#define PGSHIFT 12 73#define UPAGES 4 74#endif 75#define NBPG (1 << PGSHIFT) /* Page size */ 76#define PGOFSET (NBPG - 1) 77 78#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 79#define DEV_BSIZE (1 << DEV_BSHIFT) 80#define BLKDEV_IOSIZE NBPG 81#ifndef MAXPHYS 82#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 83#endif 84 85#define USPACE (UPAGES * NBPG) 86 87#ifndef MSGBUFSIZE 88#define MSGBUFSIZE (2*NBPG) /* default message buffer size */ 89#endif 90 91#ifndef KERNBASE 92#define KERNBASE 0x100000 93#endif 94 95/* 96 * Constants related to network buffer management. 97 * MCLBYTES must be no larger than NBPG (the software page size), and, 98 * on machines that exchange pages of input or output buffers with mbuf 99 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 100 * of the hardware page size. 101 */ 102#ifndef MSIZE 103#ifdef _LP64 104#define MSIZE 512 /* size of an mbuf */ 105#else /* _LP64 */ 106#define MSIZE 256 /* size of an mbuf */ 107#endif /* _LP64 */ 108#endif 109#ifndef MCLSHIFT 110#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 111#endif 112#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 113 114/* 115 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 116 * logical pages. 117 */ 118#ifndef NKMEMPAGES_MIN_DEFAULT 119#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 120#endif 121#ifndef NKMEMPAGES_MAX_DEFAULT 122#define NKMEMPAGES_MAX_DEFAULT ((256 * 1024 * 1024) >> PAGE_SHIFT) 123#endif 124 125#if defined(_KERNEL) && !defined(_LOCORE) 126#include <machine/cpu.h> 127#endif /* _KERNEL && !_LOCORE */ 128 129#endif /* _POWERPC_PARAM_H_ */ 130