param.h revision 1.34
1/* $NetBSD: param.h,v 1.34 2021/05/31 14:38:56 simonb 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_OPT 38#include "opt_param.h" 39#include "opt_ppcarch.h" 40#endif 41 42/* 43 * Machine dependent constants for PowerPC 44 * For userland regardless of port, force MACHINE to be "powerpc" 45 */ 46#ifndef _KERNEL 47#undef MACHINE 48#endif 49 50#ifdef _LP64 51# ifndef MACHINE 52# define MACHINE "powerpc64" 53# endif 54# define MACHINE_ARCH "powerpc64" 55# define MID_MACHINE MID_POWERPC64 56#else 57# ifndef MACHINE 58# define MACHINE "powerpc" 59# endif 60# define MACHINE_ARCH "powerpc" 61# define MID_MACHINE MID_POWERPC 62#endif 63 64/* PowerPC-specific macro to align a stack pointer (downwards). */ 65#define STACK_ALIGNBYTES (16 - 1) /* AltiVec */ 66 67#ifdef PPC_IBM4XX 68#define PGSHIFT 14 /* Use 16KB to reduce TLB thrashing */ 69#define UPAGES 1 70#else 71#define PGSHIFT 12 72#define UPAGES 4 73#endif 74#define NBPG (1 << PGSHIFT) /* Page size */ 75#define PGOFSET (NBPG - 1) 76 77#define BLKDEV_IOSIZE NBPG 78 79#define USPACE (UPAGES * NBPG) 80 81#ifndef MSGBUFSIZE 82#define MSGBUFSIZE (2*NBPG) /* default message buffer size */ 83#endif 84 85#ifndef KERNBASE 86#define KERNBASE 0x100000 87#endif 88 89/* 90 * Constants related to network buffer management. 91 * MCLBYTES must be no larger than NBPG (the software page size), and, 92 * on machines that exchange pages of input or output buffers with mbuf 93 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 94 * of the hardware page size. 95 */ 96#ifndef MSIZE 97#ifdef _LP64 98#define MSIZE 512 /* size of an mbuf */ 99#else /* _LP64 */ 100#define MSIZE 256 /* size of an mbuf */ 101#endif /* _LP64 */ 102#endif 103#ifndef MCLSHIFT 104#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 105#endif 106#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 107 108/* 109 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 110 * logical pages. 111 */ 112#ifndef NKMEMPAGES_MIN_DEFAULT 113#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 114#endif 115#ifndef NKMEMPAGES_MAX_DEFAULT 116#define NKMEMPAGES_MAX_DEFAULT ((256 * 1024 * 1024) >> PAGE_SHIFT) 117#endif 118 119#if defined(_KERNEL) && !defined(_LOCORE) 120#include <machine/cpu.h> 121#endif /* _KERNEL && !_LOCORE */ 122 123#endif /* _POWERPC_PARAM_H_ */ 124