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_ */