1/*	$NetBSD: param.h,v 1.24 2021/07/19 10:28:58 christos Exp $	*/
  2
  3/*
  4 * Copyright (c) 1994,1995 Mark Brinicombe.
  5 * All rights reserved.
  6 *
  7 * Redistribution and use in source and binary forms, with or without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    notice, this list of conditions and the following disclaimer.
 12 * 2. Redistributions in binary form must reproduce the above copyright
 13 *    notice, this list of conditions and the following disclaimer in the
 14 *    documentation and/or other materials provided with the distribution.
 15 * 3. All advertising materials mentioning features or use of this software
 16 *    must display the following acknowledgement:
 17 *	This product includes software developed by the RiscBSD team.
 18 * 4. The name "RiscBSD" nor the name of the author may be used to
 19 *    endorse or promote products derived from this software without specific
 20 *    prior written permission.
 21 *
 22 * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 25 * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 32 * SUCH DAMAGE.
 33 */
 34
 35#ifndef	_ARM_PARAM_H_
 36#define	_ARM_PARAM_H_
 37
 38/*
 39 * Machine dependent constants for all ARM processors
 40 */
 41
 42/*
 43 * For KERNEL code:
 44 *	MACHINE must be defined by the individual port.  This is so that
 45 *	uname returns the correct thing, etc.
 46 *
 47 *	MACHINE_ARCH may be defined by individual ports as a temporary
 48 *	measure while we're finishing the conversion to ELF.
 49 *
 50 * For non-KERNEL code:
 51 *	If ELF, MACHINE and MACHINE_ARCH are forced to "arm/armeb".
 52 */
 53
 54#if defined(_KERNEL)
 55# ifndef MACHINE_ARCH			/* XXX For now */
 56#  ifndef __ARMEB__
 57#   ifdef __ARM_EABI__
 58#    define	_MACHINE_ARCH	earm
 59#    define	MACHINE_ARCH	"earm"
 60#   else
 61#    define	_MACHINE_ARCH	arm
 62#    define	MACHINE_ARCH	"arm"
 63#   endif
 64#  else
 65#   ifdef __ARM_EABI__
 66#    define	_MACHINE_ARCH	earmeb
 67#    define	MACHINE_ARCH	"earmeb"
 68#   else
 69#    define	_MACHINE_ARCH	armeb
 70#    define	MACHINE_ARCH	"armeb"
 71#   endif
 72#  endif /* __ARMEB__ */
 73# endif /* MACHINE_ARCH */
 74#else
 75# undef _MACHINE
 76# undef MACHINE
 77# undef _MACHINE_ARCH
 78# undef MACHINE_ARCH
 79# define	_MACHINE	arm
 80# define	MACHINE		"arm"
 81# ifndef __ARMEB__
 82#  ifdef __ARM_EABI__
 83#   ifdef __ARM_PCS_VFP
 84#    ifdef _ARM_ARCH_7
 85#     define	_MACHINE_ARCH	earmv7hf
 86#     define	MACHINE_ARCH	"earmv7hf"
 87#    elif defined(_ARM_ARCH_6)
 88#     define	_MACHINE_ARCH	earmv6hf
 89#     define	MACHINE_ARCH	"earmv6hf"
 90#    else
 91#     define	_MACHINE_ARCH	earmhf
 92#     define	MACHINE_ARCH	"earmhf"
 93#    endif
 94#   else
 95#    ifdef _ARM_ARCH_7
 96#     define	_MACHINE_ARCH	earmv7
 97#     define	MACHINE_ARCH	"earmv7"
 98#    elif defined(_ARM_ARCH_6)
 99#     define	_MACHINE_ARCH	earmv6
100#     define	MACHINE_ARCH	"earmv6"
101#    elif !defined(_ARM_ARCH_5T)
102#     define	_MACHINE_ARCH	earmv4
103#     define	MACHINE_ARCH	"earmv4"
104#    else
105#     define	_MACHINE_ARCH	earm
106#     define	MACHINE_ARCH	"earm"
107#    endif
108#   endif
109#  else
110#   define	_MACHINE_ARCH	arm
111#   define	MACHINE_ARCH	"arm"
112#  endif
113# else
114#  ifdef __ARM_EABI__
115#   ifdef __ARM_PCS_VFP
116#    ifdef _ARM_ARCH_7
117#     define	_MACHINE_ARCH	earmv7hfeb
118#     define	MACHINE_ARCH	"earmv7hfeb"
119#    elif defined(_ARM_ARCH_6)
120#     define	_MACHINE_ARCH	earmv6hfeb
121#     define	MACHINE_ARCH	"earmv6hfeb"
122#    else
123#     define	_MACHINE_ARCH	earmhfeb
124#     define	MACHINE_ARCH	"earmhfeb"
125#    endif
126#  else
127#    ifdef _ARM_ARCH_7
128#     define	_MACHINE_ARCH	earmv7eb
129#     define	MACHINE_ARCH	"earmv7eb"
130#    elif defined(_ARM_ARCH_6)
131#     define	_MACHINE_ARCH	earmv6eb
132#     define	MACHINE_ARCH	"earmv6eb"
133#    elif !defined(_ARM_ARCH_5T)
134#     define	_MACHINE_ARCH	earmv4eb
135#     define	MACHINE_ARCH	"earmv4eb"
136#    else
137#     define	_MACHINE_ARCH	earmeb
138#     define	MACHINE_ARCH	"earmeb"
139#    endif
140#   endif
141#  else
142#   define	_MACHINE_ARCH	armeb
143#   define	MACHINE_ARCH	"armeb"
144#  endif
145# endif /* __ARMEB__ */
146#endif /* !_KERNEL */
147
148#define MAXCPUS		8
149
150#define	MID_MACHINE	MID_ARM6
151
152/* ARM-specific macro to align a stack pointer (downwards). */
153#define STACK_ALIGNBYTES	(8 - 1)
154#ifdef __ARM_EABI__
155#define	ALIGNBYTES32	3
156#else
157#define	ALIGNBYTES32	7
158#endif
159
160/*
161 * Constants related to network buffer management.
162 * MCLBYTES must be no larger than NBPG (the software page size), and,
163 * on machines that exchange pages of input or output buffers with mbuf
164 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
165 * of the hardware page size.
166 */
167#define	MSIZE		256		/* size of an mbuf */
168
169#ifndef MCLSHIFT
170#define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
171					/* 2K cluster can hold Ether frame */
172#endif	/* MCLSHIFT */
173
174#define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
175
176#ifndef NMBCLUSTERS_MAX
177#define	NMBCLUSTERS_MAX	(0x4000000 / MCLBYTES)	/* Limit to 64MB for clusters */
178#endif
179
180/*
181 * Compatibility /dev/zero mapping.
182 */
183#ifdef _KERNEL
184#ifdef COMPAT_16
185#define	COMPAT_ZERODEV(x)	(x == makedev(0, _DEV_ZERO_oARM))
186#endif
187#endif /* _KERNEL */
188
189#endif /* _ARM_PARAM_H_ */