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param.h revision 1.1 
      1 /* $NetBSD: param.h,v 1.1 2014/08/10 05:47:38 matt Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef	_AARCH64_PARAM_H_
     33 #define	_AARCH64_PARAM_H_
     34 
     35 #ifdef __aarch64__
     36 
     37 /*
     38  * Machine dependent constants for all ARM processors
     39  */
     40 
     41 /*
     42  * For KERNEL code:
     43  *	MACHINE must be defined by the individual port.  This is so that
     44  *	uname returns the correct thing, etc.
     45  *
     46  *	MACHINE_ARCH may be defined by individual ports as a temporary
     47  *	measure while we're finishing the conversion to ELF.
     48  *
     49  * For non-KERNEL code:
     50  *	If ELF, MACHINE and MACHINE_ARCH are forced to "arm/armeb".
     51  */
     52 
     53 #if defined(_KERNEL)
     54 # ifndef MACHINE_ARCH			/* XXX For now */
     55 #  ifndef __AARCH64EB__
     56 #   define	_MACHINE_ARCH	aarch64eb
     57 #   define	MACHINE_ARCH	"aarch64eb"
     58 #  else
     59 #   define	_MACHINE_ARCH	aarch64
     60 #   define	MACHINE_ARCH	"aarch64"
     61 #  endif /* __AARCH64EB__ */
     62 # endif /* MACHINE_ARCH */
     63 #else
     64 # undef _MACHINE
     65 # undef MACHINE
     66 # undef _MACHINE_ARCH
     67 # undef MACHINE_ARCH
     68 # define	_MACHINE	aarch64
     69 # define	MACHINE		"aarch64"
     70 # ifndef __AARCH64EB__
     71 #  define	_MACHINE_ARCH	aarch64eb
     72 #  define	MACHINE_ARCH	"aarch64eb"
     73 # else
     74 #  define	_MACHINE_ARCH	aarch64
     75 #  define	MACHINE_ARCH	"aarch64"
     76 # endif /* __AARCH64EB__ */
     77 #endif /* !_KERNEL */
     78 
     79 #define	MID_MACHINE	MID_AARCH64
     80 
     81 /* AARCH64-specific macro to align a stack pointer (downwards). */
     82 #define STACK_ALIGNBYTES	(16 - 1)
     83 #define	ALIGNBYTES32	7
     84 
     85 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     86 #define	DEV_BSIZE	(1 << DEV_BSHIFT)
     87 #define	BLKDEV_IOSIZE	2048
     88 
     89 #ifndef MAXPHYS
     90 #define	MAXPHYS		65536		/* max I/O transfer size */
     91 #endif
     92 
     93 #define NKMEMPAGES_MAX_DEFAULT	(2048UL * 1024 * 1024)
     94 #define NKMEMPAGES_MIN_DEFAULT	(128UL * 1024 * 1024)
     95 
     96 #ifdef AARCH64_PAGE_SHIFT
     97 #if (1 << AARCH64_PAGE_SHIFT) & ~0x141000
     98 #error AARCH64_PAGE_SHIFT contains an unsupported value.
     99 #endif
    100 #define PGSHIFT		AARCH64_PAGE_SHIFT
    101 #else
    102 #define PGSHIFT		12
    103 #endif
    104 #define	NBPG		(1 << PGSHIFT)
    105 #define PGOFSET		(NBPG - 1)
    106 
    107 /*
    108  * Constants related to network buffer management.
    109  * MCLBYTES must be no larger than NBPG (the software page size), and
    110  * NBPG % MCLBYTES must be zero.
    111  */
    112 #if PGSHIFT > 12
    113 #define	MSIZE		256		/* size of an mbuf */
    114 #else
    115 #define	MSIZE		512		/* size of an mbuf */
    116 #endif
    117 
    118 #ifndef MCLSHIFT
    119 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
    120 					/* 2K cluster can hold Ether frame */
    121 #endif	/* MCLSHIFT */
    122 
    123 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
    124 
    125 #ifdef _KERNEL
    126 void delay(unsigned long);
    127 #define	DELAY(x)	delay(x)
    128 #endif
    129 /*
    130  * Compatibility /dev/zero mapping.
    131  */
    132 #ifdef _KERNEL
    133 #ifdef COMPAT_16
    134 #define	COMPAT_ZERODEV(x)	(x == makedev(0, _DEV_ZERO_oARM))
    135 #endif
    136 #endif /* _KERNEL */
    137 
    138 #elif defined(__arm__)
    139 
    140 #include <arm/param.h>
    141 
    142 #endif /* __aarch64__/__arm__ */
    143 
    144 #endif /* _AARCH64_PARAM_H_ */
    145