1/* $NetBSD: param.h,v 1.16 2021/05/31 14:38:57 simonb 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#include "opt_param.h"
40#endif
41
42/*
43 * Machine dependent constants for all ARM processors
44 */
45
46/*
47 * For KERNEL code:
48 * MACHINE must be defined by the individual port. This is so that
49 * uname returns the correct thing, etc.
50 *
51 * MACHINE_ARCH may be defined by individual ports as a temporary
52 * measure while we're finishing the conversion to ELF.
53 *
54 * For non-KERNEL code:
55 * If ELF, MACHINE and MACHINE_ARCH are forced to "arm/armeb".
56 */
57
58#if defined(_KERNEL)
59# ifndef MACHINE_ARCH /* XXX For now */
60# ifdef __AARCH64EB__
61# define _MACHINE_ARCH aarch64eb
62# define MACHINE_ARCH "aarch64eb"
63# define _MACHINE32_ARCH earmv7hfeb
64# define MACHINE32_ARCH "earmv7hfeb"
65# else
66# define _MACHINE_ARCH aarch64
67# define MACHINE_ARCH "aarch64"
68# define _MACHINE32_ARCH earmv7hf
69# define MACHINE32_ARCH "earmv7hf"
70# endif /* __AARCH64EB__ */
71# endif /* MACHINE_ARCH */
72#else
73# undef _MACHINE
74# undef MACHINE
75# undef _MACHINE_ARCH
76# undef MACHINE_ARCH
77# undef _MACHINE32_ARCH
78# undef MACHINE32_ARCH
79# define _MACHINE aarch64
80# define MACHINE "aarch64"
81# ifdef __AARCH64EB__
82# define _MACHINE_ARCH aarch64eb
83# define MACHINE_ARCH "aarch64eb"
84# define _MACHINE32_ARCH earmv7hfeb
85# define MACHINE32_ARCH "earmv7hfeb"
86# else
87# define _MACHINE_ARCH aarch64
88# define MACHINE_ARCH "aarch64"
89# define _MACHINE32_ARCH earmv7hf
90# define MACHINE32_ARCH "earmv7hf"
91# endif /* __AARCH64EB__ */
92#endif /* !_KERNEL */
93
94#define MID_MACHINE MID_AARCH64
95
96/* AARCH64-specific macro to align a stack pointer (downwards). */
97#define STACK_ALIGNBYTES (16 - 1)
98
99#define ALIGNBYTES32 (8 - 1)
100#define ALIGN32(p) \
101 (((uintptr_t)(p) + ALIGNBYTES32) & ~ALIGNBYTES32)
102
103#define NKMEMPAGES_MIN_DEFAULT ((128UL * 1024 * 1024) >> PAGE_SHIFT)
104#define NKMEMPAGES_MAX_UNLIMITED 1
105
106#ifdef AARCH64_PAGE_SHIFT
107#if (1 << AARCH64_PAGE_SHIFT) & ~0x141000
108#error AARCH64_PAGE_SHIFT contains an unsupported value.
109#endif
110#define PGSHIFT AARCH64_PAGE_SHIFT
111#else
112#define PGSHIFT 12
113#endif
114#define NBPG (1 << PGSHIFT)
115#define PGOFSET (NBPG - 1)
116
117/*
118 * Constants related to network buffer management.
119 * MCLBYTES must be no larger than NBPG (the software page size), and
120 * NBPG % MCLBYTES must be zero.
121 */
122#if PGSHIFT > 12
123#define MSIZE 256 /* size of an mbuf */
124#else
125#define MSIZE 512 /* size of an mbuf */
126#endif
127
128#ifndef MCLSHIFT
129#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
130 /* 2K cluster can hold Ether frame */
131#endif /* MCLSHIFT */
132
133#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
134
135#ifndef NFS_RSIZE
136#define NFS_RSIZE 32768 /* Default NFS read data size */
137#endif
138#ifndef NFS_WSIZE
139#define NFS_WSIZE 32768 /* Default NFS write data size */
140#endif
141
142#ifndef MSGBUFSIZE
143#define MSGBUFSIZE 65536 /* default message buffer size */
144#endif
145
146#define COHERENCY_UNIT 128
147#define CACHE_LINE_SIZE 128
148
149#define MAXCPUS 256
150
151#ifdef _KERNEL
152
153#ifndef __HIDE_DELAY
154void delay(unsigned int);
155#define DELAY(x) delay(x)
156#endif
157/*
158 * Compatibility /dev/zero mapping.
159 */
160#ifdef COMPAT_16
161#define COMPAT_ZERODEV(x) (x == makedev(0, _DEV_ZERO_oARM))
162#endif
163
164#endif /* _KERNEL */
165
166#define aarch64_btop(x) ((unsigned long)(x) >> PGSHIFT)
167#define aarch64_ptob(x) ((unsigned long)(x) << PGSHIFT)
168#define aarch64_trunc_page(x) ((unsigned long)(x) & ~PGSHIFT)
169#define aarch64_round_page(x) ((((unsigned long)(x)) + PGOFSET) & ~PGOFSET)
170
171/* compatibility for arm */
172#define arm_btop(x) aarch64_btop(x)
173#define arm_ptob(x) aarch64_ptob(x)
174
175#elif defined(__arm__)
176
177#include <arm/param.h>
178
179#endif /* __aarch64__/__arm__ */
180
181#endif /* _AARCH64_PARAM_H_ */