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/* $OpenBSD: param.h,v 1.20 2002/03/13 18:27:36 drahn Exp $ */
/* $NetBSD: param.h,v 1.1 1996/09/30 16:34:28 ws 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
#ifndef _LOCORE
#include <machine/cpu.h>
#endif /* _LOCORE */
#endif
/*
* Machine dependent constants for PowerPC (32-bit only currently)
*/
#define MACHINE_ARCH "powerpc"
#define _MACHINE_ARCH powerpc
#define MID_MACHINE 0 /* None but has to be defined */
#define ALIGNBYTES (sizeof(double) - 1)
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
#define PGSHIFT 12
#define NBPG 4096
#define PGOFSET (NBPG - 1)
#define PAGE_SIZE NBPG
#define PAGE_MASK PGOFSET
#define PAGE_SHIFT PGSHIFT
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << DEV_BSHIFT)
#define BLKDEV_IOSIZE NBPG
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#define UPAGES 4
#define USPACE (UPAGES * NBPG)
/*
* Constants related to network buffer management.
* MCLBYTES must be no larger than 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.
*/
#define MSIZE 256 /* size of an mbuf */
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
#define MCLOFSET (MCLBYTES - 1)
#ifndef NMBCLUSTERS
#ifdef GATEWAY
#define NMBCLUSTERS 2048 /* map size, max cluster allocation */
#else
#define NMBCLUSTERS 1024 /* map size, max cluster allocation */
#endif
#endif
/*
* pages ("clicks") to disk blocks
*/
#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
/*
* bytes to pages
*/
#define ctob(x) ((x) << PGSHIFT)
#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
/*
* bytes to disk blocks
*/
#define dbtob(x) ((x) << DEV_BSHIFT)
#define btodb(x) ((x) >> DEV_BSHIFT)
/*
* Mach derived conversion macros
*/
#define powerpc_btop(x) ((unsigned)(x) >> PGSHIFT)
#define powerpc_ptob(x) ((unsigned)(x) << PGSHIFT)
/*
* Segment handling stuff
*/
#define SEGMENT_LENGTH 0x10000000
#define SEGMENT_MASK 0xf0000000
/*
* Fixed segments
*/
#define USER_SR 13
#define KERNEL_SR 14
#define KERNEL_SEG0 0xfffff0
#define KERNEL_SEGMENT (KERNEL_SEG0 + KERNEL_SR)
#define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHIFT))
/*
* Some system constants
*/
#ifndef NPMAPS
#define NPMAPS 32768 /* Number of pmaps in system */
#endif
/*
* Temporary kludge till we do (ov)bcopy in assembler
*/
#define ovbcopy bcopy
#endif /* _POWERPC_PARAM_H_ */
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