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param.h revision 1.32 
      1 /*	$NetBSD: param.h,v 1.32 2020/02/21 12:56:37 rin 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 #endif
     42 
     43 /*
     44  * Machine dependent constants for PowerPC
     45  * For userland regardless of port, force MACHINE to be "powerpc"
     46  */
     47 #ifndef _KERNEL
     48 #undef MACHINE
     49 #endif
     50 
     51 #ifdef _LP64
     52 # ifndef MACHINE
     53 #  define	MACHINE		"powerpc64"
     54 # endif
     55 # define	MACHINE_ARCH	"powerpc64"
     56 # define	MID_MACHINE	MID_POWERPC64
     57 #else
     58 # ifndef MACHINE
     59 #  define	MACHINE		"powerpc"
     60 # endif
     61 # define	MACHINE_ARCH	"powerpc"
     62 # define	MID_MACHINE	MID_POWERPC
     63 #endif
     64 
     65 /* PowerPC-specific macro to align a stack pointer (downwards). */
     66 #define	STACK_ALIGNBYTES	(16 - 1)	/* AltiVec */
     67 
     68 #ifdef PPC_IBM4XX
     69 #define	PGSHIFT		14	/* Use 16KB to reduce TLB thrashing */
     70 #define	UPAGES		1
     71 #else
     72 #define	PGSHIFT		12
     73 #define	UPAGES		4
     74 #endif
     75 #define	NBPG		(1 << PGSHIFT)	/* Page size */
     76 #define	PGOFSET		(NBPG - 1)
     77 
     78 #define	BLKDEV_IOSIZE	NBPG
     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	((256 * 1024 * 1024) >> PAGE_SHIFT)
    118 #endif
    119 
    120 #if defined(_KERNEL) && !defined(_LOCORE)
    121 #include <machine/cpu.h>
    122 #endif	/* _KERNEL && !_LOCORE */
    123 
    124 #endif /* _POWERPC_PARAM_H_ */
    125