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_ */