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param.h revision 1.11 
      1 /* $NetBSD: param.h,v 1.11 2019/01/19 09:11:55 skrll 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 #ifdef _KERNEL_OPT
     38 #include "opt_cputypes.h"
     39 #endif
     40 
     41 /*
     42  * Machine dependent constants for all ARM processors
     43  */
     44 
     45 /*
     46  * For KERNEL code:
     47  *	MACHINE must be defined by the individual port.  This is so that
     48  *	uname returns the correct thing, etc.
     49  *
     50  *	MACHINE_ARCH may be defined by individual ports as a temporary
     51  *	measure while we're finishing the conversion to ELF.
     52  *
     53  * For non-KERNEL code:
     54  *	If ELF, MACHINE and MACHINE_ARCH are forced to "arm/armeb".
     55  */
     56 
     57 #if defined(_KERNEL)
     58 # ifndef MACHINE_ARCH		/* XXX For now */
     59 #  ifdef __AARCH64EB__
     60 #   define	_MACHINE_ARCH	aarch64eb
     61 #   define	MACHINE_ARCH	"aarch64eb"
     62 #  else
     63 #   define	_MACHINE_ARCH	aarch64
     64 #   define	MACHINE_ARCH	"aarch64"
     65 #  endif /* __AARCH64EB__ */
     66 # endif /* MACHINE_ARCH */
     67 #else
     68 # undef _MACHINE
     69 # undef MACHINE
     70 # undef _MACHINE_ARCH
     71 # undef MACHINE_ARCH
     72 # define	_MACHINE	aarch64
     73 # define	MACHINE		"aarch64"
     74 # ifdef __AARCH64EB__
     75 #  define	_MACHINE_ARCH	aarch64eb
     76 #  define	MACHINE_ARCH	"aarch64eb"
     77 # else
     78 #  define	_MACHINE_ARCH	aarch64
     79 #  define	MACHINE_ARCH	"aarch64"
     80 # endif /* __AARCH64EB__ */
     81 #endif /* !_KERNEL */
     82 
     83 #define	MID_MACHINE	MID_AARCH64
     84 
     85 /* AARCH64-specific macro to align a stack pointer (downwards). */
     86 #define STACK_ALIGNBYTES	(16 - 1)
     87 
     88 #define ALIGNBYTES32		(8 - 1)
     89 #define ALIGN32(p)		\
     90 	(((uintptr_t)(p) + ALIGNBYTES32) & ~ALIGNBYTES32)
     91 
     92 #define NKMEMPAGES_MIN_DEFAULT		((128UL * 1024 * 1024) >> PAGE_SHIFT)
     93 #define NKMEMPAGES_MAX_UNLIMITED	1
     94 
     95 #ifdef AARCH64_PAGE_SHIFT
     96 #if (1 << AARCH64_PAGE_SHIFT) & ~0x141000
     97 #error AARCH64_PAGE_SHIFT contains an unsupported value.
     98 #endif
     99 #define PGSHIFT			AARCH64_PAGE_SHIFT
    100 #else
    101 #define PGSHIFT			12
    102 #endif
    103 #define NBPG			(1 << PGSHIFT)
    104 #define PGOFSET			(NBPG - 1)
    105 
    106 /*
    107  * Constants related to network buffer management.
    108  * MCLBYTES must be no larger than NBPG (the software page size), and
    109  * NBPG % MCLBYTES must be zero.
    110  */
    111 #if PGSHIFT > 12
    112 #define MSIZE			256	/* size of an mbuf */
    113 #else
    114 #define MSIZE			512	/* size of an mbuf */
    115 #endif
    116 
    117 #ifndef MCLSHIFT
    118 #define MCLSHIFT		11	/* convert bytes to m_buf clusters */
    119 					/* 2K cluster can hold Ether frame */
    120 #endif /* MCLSHIFT */
    121 
    122 #define MCLBYTES		(1 << MCLSHIFT)	/* size of a m_buf cluster */
    123 
    124 
    125 #ifndef MSGBUFSIZE
    126 #define MSGBUFSIZE		65536	/* default message buffer size */
    127 #endif
    128 
    129 #define COHERENCY_UNIT		128
    130 #define CACHE_LINE_SIZE		128
    131 
    132 #ifdef _KERNEL
    133 
    134 #ifndef __HIDE_DELAY
    135 void delay(unsigned int);
    136 #define	DELAY(x)	delay(x)
    137 #endif
    138 /*
    139  * Compatibility /dev/zero mapping.
    140  */
    141 #ifdef COMPAT_16
    142 #define COMPAT_ZERODEV(x)	(x == makedev(0, _DEV_ZERO_oARM))
    143 #endif
    144 
    145 #endif /* _KERNEL */
    146 
    147 #define aarch64_btop(x)		((unsigned long)(x) >> PGSHIFT)
    148 #define aarch64_ptob(x)		((unsigned long)(x) << PGSHIFT)
    149 #define aarch64_trunc_page(x)	((unsigned long)(x) & ~PGSHIFT)
    150 #define aarch64_round_page(x)	((((unsigned long)(x)) + PGOFSET) & ~PGOFSET)
    151 
    152 /* compatibility for arm */
    153 #define arm_btop(x)		aarch64_btop(x)
    154 #define arm_ptob(x)		aarch64_ptob(x)
    155 #define arm_trunc_page(x)	aarch64_trunc_page(x)
    156 #define arm_round_page(x)	aarch64_round_page(x)
    157 
    158 #elif defined(__arm__)
    159 
    160 #include <arm/param.h>
    161 
    162 #endif /* __aarch64__/__arm__ */
    163 
    164 #endif /* _AARCH64_PARAM_H_ */
    165