* Copyright (C) 1995, 1996 Wolfgang Solfrank.

/* $NetBSD: param.h,v 1.34 2021/05/31 14:38:56 simonb Exp $ */

/*-
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _POWERPC_PARAM_H
#define _POWERPC_PARAM_H

#ifdef _KERNEL_OPT
#include "opt_param.h"
#include "opt_ppcarch.h"
#endif

/*
* Machine dependent constants for PowerPC
* For userland regardless of port, force MACHINE to be "powerpc"
*/
#ifndef _KERNEL
#undef MACHINE
#endif

#ifdef _LP64
# ifndef MACHINE
# define MACHINE "powerpc64"
# endif
# define MACHINE_ARCH "powerpc64"
# define MID_MACHINE MID_POWERPC64
#else
# ifndef MACHINE
# define MACHINE "powerpc"
# endif
# define MACHINE_ARCH "powerpc"
# define MID_MACHINE MID_POWERPC
#endif

/* PowerPC-specific macro to align a stack pointer (downwards). */
#define STACK_ALIGNBYTES (16 - 1) /* AltiVec */

#ifdef PPC_IBM4XX
#define PGSHIFT 14 /* Use 16KB to reduce TLB thrashing */
#define UPAGES 1
#else
#define PGSHIFT 12
#define UPAGES 4
#endif
#define NBPG (1 << PGSHIFT) /* Page size */
#define PGOFSET (NBPG - 1)

#define BLKDEV_IOSIZE NBPG

#define USPACE (UPAGES * NBPG)

#ifndef MSGBUFSIZE
#define MSGBUFSIZE (2*NBPG) /* default message buffer size */
#endif

#ifndef KERNBASE
#define KERNBASE 0x100000
#endif

/*
* Constants related to network buffer management.
* MCLBYTES must be no larger than NBPG (the software page size), and,
* on machines that exchange pages of input or output buffers with mbuf
* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
* of the hardware page size.
*/
#ifndef MSIZE
#ifdef _LP64
#define MSIZE 512 /* size of an mbuf */
#else /* _LP64 */
#define MSIZE 256 /* size of an mbuf */
#endif /* _LP64 */
#endif
#ifndef MCLSHIFT
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
#endif
#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */

/*
* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
* logical pages.
*/
#ifndef NKMEMPAGES_MIN_DEFAULT
#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT)
#endif
#ifndef NKMEMPAGES_MAX_DEFAULT
#define NKMEMPAGES_MAX_DEFAULT ((256 * 1024 * 1024) >> PAGE_SHIFT)
#endif

#if defined(_KERNEL) && !defined(_LOCORE)
#include <machine/cpu.h>
#endif /* _KERNEL && !_LOCORE */

#endif /* _POWERPC_PARAM_H_ */