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param.h revision 1.41 
      1 /* $NetBSD: param.h,v 1.41 2012/02/10 17:35:50 para Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1992, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department and Ralph Campbell.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: Utah $Hdr: machparam.h 1.11 89/08/14$
     37  *
     38  *	@(#)param.h	8.1 (Berkeley) 6/10/93
     39  */
     40 
     41 /*
     42  * Machine dependent constants for the Alpha.
     43  */
     44 #define	_MACHINE	alpha
     45 #define	MACHINE		"alpha"
     46 #define	_MACHINE_ARCH	alpha
     47 #define	MACHINE_ARCH	"alpha"
     48 #define	MID_MACHINE	MID_ALPHA
     49 
     50 #include <machine/cpu.h>
     51 
     52 #define	NBPG		(1 << ALPHA_PGSHIFT)		/* bytes/page */
     53 #define	PGOFSET		(NBPG-1)			/* byte off. into pg */
     54 #define	PGSHIFT		ALPHA_PGSHIFT			/* LOG2(NBPG) */
     55 
     56 #define	KERNBASE	0xfffffc0000230000	/* start of kernel virtual */
     57 #define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
     58 
     59 #define	DEV_BSIZE	512
     60 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     61 #define	BLKDEV_IOSIZE	2048
     62 #ifndef	MAXPHYS
     63 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     64 #endif
     65 
     66 #define	SSIZE		1		/* initial stack size/NBPG */
     67 #define	SINCR		1		/* increment of stack/NBPG */
     68 
     69 #define	UPAGES		2			/* pages of u-area */
     70 #define	USPACE		(UPAGES * NBPG)		/* total size of u-area */
     71 
     72 #ifndef MSGBUFSIZE
     73 #define MSGBUFSIZE	NBPG		/* default message buffer size */
     74 #endif
     75 
     76 /*
     77  * Constants related to network buffer management.
     78  * MCLBYTES must be no larger than NBPG (the software page size), and,
     79  * on machines that exchange pages of input or output buffers with mbuf
     80  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     81  * of the hardware page size.
     82  */
     83 #define	MSIZE		256		/* size of an mbuf */
     84 
     85 #ifndef MCLSHIFT
     86 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
     87 					/* 2K cluster can hold Ether frame */
     88 #endif	/* MCLSHIFT */
     89 
     90 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
     91 
     92 /*
     93  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
     94  * logical pages.
     95  * No enforced maximum on alpha
     96  */
     97 #define	NKMEMPAGES_MIN_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
     98 #define	NKMEMPAGES_MAX_UNLIMITED	1
     99 
    100 /*
    101  * Mach derived conversion macros
    102  */
    103 #define	alpha_round_page(x)	((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1))
    104 #define	alpha_trunc_page(x)	((unsigned long)(x) & ~(NBPG-1))
    105 #define	alpha_btop(x)		((unsigned long)(x) >> PGSHIFT)
    106 #define	alpha_ptob(x)		((unsigned long)(x) << PGSHIFT)
    107 
    108 #ifdef _KERNEL
    109 #ifndef _LOCORE
    110 
    111 #include <machine/intr.h>
    112 
    113 void	delay(unsigned long);
    114 #define	DELAY(n)	delay(n)
    115 
    116 /* XXX THE FOLLOWING PROTOTYPE SHOULD BE A BUS.H INTERFACE */
    117 paddr_t alpha_XXX_dmamap(vaddr_t);
    118 /* XXX END BUS.H */
    119 
    120 #endif
    121 #endif /* !_KERNEL */
    122