1/*
2 * Copyright (c) 1999-2023 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#ifndef _OS_OSBYTEORDERARM_H
30#define _OS_OSBYTEORDERARM_H
31
32#if defined (__arm__) || defined(__arm64__)
33
34#include <stdint.h>
35#include <libkern/arm/_OSByteOrder.h>
36#include <sys/_types/_os_inline.h>
37#include <arm/arch.h> /* for _ARM_ARCH_6 */
38
39/* Functions for byte reversed loads. */
40
41struct _OSUnalignedU16 {
42 volatile uint16_t __val;
43} __attribute__((__packed__));
44
45struct _OSUnalignedU32 {
46 volatile uint32_t __val;
47} __attribute__((__packed__));
48
49struct _OSUnalignedU64 {
50 volatile uint64_t __val;
51} __attribute__((__packed__));
52
53#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
54OS_INLINE
55uint16_t
56_OSReadSwapInt16(
57 const volatile void * _base,
58 uintptr_t _offset
59 )
60{
61 return _OSSwapInt16(((struct _OSUnalignedU16 *)((uintptr_t)_base + _offset))->__val);
62}
63#else
64OS_INLINE
65uint16_t
66OSReadSwapInt16(
67 const volatile void * _base,
68 uintptr_t _offset
69 )
70{
71 return _OSSwapInt16(((struct _OSUnalignedU16 *)((uintptr_t)_base + _offset))->__val);
72}
73#endif
74
75#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
76OS_INLINE
77uint32_t
78_OSReadSwapInt32(
79 const volatile void * _base,
80 uintptr_t _offset
81 )
82{
83 return _OSSwapInt32(((struct _OSUnalignedU32 *)((uintptr_t)_base + _offset))->__val);
84}
85#else
86OS_INLINE
87uint32_t
88OSReadSwapInt32(
89 const volatile void * _base,
90 uintptr_t _offset
91 )
92{
93 return _OSSwapInt32(((struct _OSUnalignedU32 *)((uintptr_t)_base + _offset))->__val);
94}
95#endif
96
97#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
98OS_INLINE
99uint64_t
100_OSReadSwapInt64(
101 const volatile void * _base,
102 uintptr_t _offset
103 )
104{
105 return _OSSwapInt64(((struct _OSUnalignedU64 *)((uintptr_t)_base + _offset))->__val);
106}
107#else
108OS_INLINE
109uint64_t
110OSReadSwapInt64(
111 const volatile void * _base,
112 uintptr_t _offset
113 )
114{
115 return _OSSwapInt64(((struct _OSUnalignedU64 *)((uintptr_t)_base + _offset))->__val);
116}
117#endif
118
119/* Functions for byte reversed stores. */
120
121#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
122OS_INLINE
123void
124_OSWriteSwapInt16(
125 volatile void * _base,
126 uintptr_t _offset,
127 uint16_t _data
128 )
129{
130 ((struct _OSUnalignedU16 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt16(_data);
131}
132#else
133OS_INLINE
134void
135OSWriteSwapInt16(
136 volatile void * _base,
137 uintptr_t _offset,
138 uint16_t _data
139 )
140{
141 ((struct _OSUnalignedU16 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt16(_data);
142}
143#endif
144
145#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
146OS_INLINE
147void
148_OSWriteSwapInt32(
149 volatile void * _base,
150 uintptr_t _offset,
151 uint32_t _data
152 )
153{
154 ((struct _OSUnalignedU32 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt32(_data);
155}
156#else
157OS_INLINE
158void
159OSWriteSwapInt32(
160 volatile void * _base,
161 uintptr_t _offset,
162 uint32_t _data
163 )
164{
165 ((struct _OSUnalignedU32 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt32(_data);
166}
167#endif
168
169#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
170OS_INLINE
171void
172_OSWriteSwapInt64(
173 volatile void * _base,
174 uintptr_t _offset,
175 uint64_t _data
176 )
177{
178 ((struct _OSUnalignedU64 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt64(_data);
179}
180#else
181OS_INLINE
182void
183OSWriteSwapInt64(
184 volatile void * _base,
185 uintptr_t _offset,
186 uint64_t _data
187 )
188{
189 ((struct _OSUnalignedU64 *)((uintptr_t)_base + _offset))->__val = _OSSwapInt64(_data);
190}
191#endif
192
193#endif /* defined (__arm__) || defined(__arm64__) */
194
195#endif /* ! _OS_OSBYTEORDERARM_H */