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param.h revision 1.22.2.1 
      1 /*	$NetBSD: param.h,v 1.22.2.1 2011/06/06 09:06:28 jruoho 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 #ifndef	_LOCORE
     42 #include <machine/cpu.h>
     43 #endif	/* _LOCORE */
     44 #endif
     45 
     46 /*
     47  * Machine dependent constants for PowerPC (32-bit only currently)
     48  * For userland regardless of port, force MACHINE to be "powerpc"
     49  */
     50 #ifndef _KERNEL
     51 #undef MACHINE
     52 #endif
     53 #ifndef MACHINE
     54 #define	MACHINE		"powerpc"
     55 #endif
     56 #define	MACHINE_ARCH	"powerpc"
     57 #define	MID_MACHINE	MID_POWERPC
     58 
     59 #define	ALIGNBYTES		(sizeof(double) - 1)
     60 #define	ALIGN(p)		(((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES)
     61 #define	ALIGNED_POINTER(p,t)	((((u_long)(p)) & (sizeof(t)-1)) == 0)
     62 
     63 #ifdef PPC_IBM4XX
     64 #define	PGSHIFT		14	/* Use 16KB to reduce TLB thrashing */
     65 #define	UPAGES		1
     66 #else
     67 #define	PGSHIFT		12
     68 #define	UPAGES		4
     69 #endif
     70 #define	NBPG		(1 << PGSHIFT)	/* Page size */
     71 #define	PGOFSET		(NBPG - 1)
     72 
     73 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     74 #define	DEV_BSIZE	(1 << DEV_BSHIFT)
     75 #define	BLKDEV_IOSIZE	NBPG
     76 #ifndef MAXPHYS
     77 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     78 #endif
     79 
     80 #define	USPACE		(UPAGES * NBPG)
     81 
     82 #ifndef	MSGBUFSIZE
     83 #define	MSGBUFSIZE	(2*NBPG)	/* default message buffer size */
     84 #endif
     85 
     86 #ifndef KERNBASE
     87 #define	KERNBASE	0x100000
     88 #endif
     89 
     90 /*
     91  * Constants related to network buffer management.
     92  * MCLBYTES must be no larger than NBPG (the software page size), and,
     93  * on machines that exchange pages of input or output buffers with mbuf
     94  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     95  * of the hardware page size.
     96  */
     97 #ifndef MSIZE
     98 #ifdef _LP64
     99 #define	MSIZE		512		/* size of an mbuf */
    100 #else  /* _LP64 */
    101 #define	MSIZE		256		/* size of an mbuf */
    102 #endif /* _LP64 */
    103 #endif
    104 #ifndef MCLSHIFT
    105 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
    106 #endif
    107 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
    108 
    109 /*
    110  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
    111  * logical pages.
    112  */
    113 #ifndef NKMEMPAGES_MIN_DEFAULT
    114 #define	NKMEMPAGES_MIN_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
    115 #endif
    116 #ifndef NKMEMPAGES_MAX_DEFAULT
    117 #define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
    118 #endif
    119 
    120 #endif /* _POWERPC_PARAM_H_ */
    121