1 /*
2 * Copyright (c) 1999-2023 Apple Computer, 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_OSBYTEORDERI386_H
30 #define _OS_OSBYTEORDERI386_H
31
32 #if defined(__i386__) || defined(__x86_64__)
33
34 #include <stdint.h>
35 #include <libkern/i386/_OSByteOrder.h>
36 #include <sys/_types/_os_inline.h>
37
38 /* Functions for byte reversed loads. */
39
40 OS_INLINE
41 uint16_t
OSReadSwapInt16(const volatile void * base,uintptr_t byteOffset)42 OSReadSwapInt16(
43 const volatile void * base,
44 uintptr_t byteOffset
45 )
46 {
47 uint16_t result;
48
49 result = *(volatile uint16_t *)((uintptr_t)base + byteOffset);
50 return _OSSwapInt16(result);
51 }
52
53 OS_INLINE
54 uint32_t
OSReadSwapInt32(const volatile void * base,uintptr_t byteOffset)55 OSReadSwapInt32(
56 const volatile void * base,
57 uintptr_t byteOffset
58 )
59 {
60 uint32_t result;
61
62 result = *(volatile uint32_t *)((uintptr_t)base + byteOffset);
63 return _OSSwapInt32(result);
64 }
65
66 OS_INLINE
67 uint64_t
OSReadSwapInt64(const volatile void * base,uintptr_t byteOffset)68 OSReadSwapInt64(
69 const volatile void * base,
70 uintptr_t byteOffset
71 )
72 {
73 uint64_t result;
74
75 result = *(volatile uint64_t *)((uintptr_t)base + byteOffset);
76 return _OSSwapInt64(result);
77 }
78
79 /* Functions for byte reversed stores. */
80
81 OS_INLINE
82 void
OSWriteSwapInt16(volatile void * base,uintptr_t byteOffset,uint16_t data)83 OSWriteSwapInt16(
84 volatile void * base,
85 uintptr_t byteOffset,
86 uint16_t data
87 )
88 {
89 *(volatile uint16_t *)((uintptr_t)base + byteOffset) = _OSSwapInt16(data);
90 }
91
92 OS_INLINE
93 void
OSWriteSwapInt32(volatile void * base,uintptr_t byteOffset,uint32_t data)94 OSWriteSwapInt32(
95 volatile void * base,
96 uintptr_t byteOffset,
97 uint32_t data
98 )
99 {
100 *(volatile uint32_t *)((uintptr_t)base + byteOffset) = _OSSwapInt32(data);
101 }
102
103 OS_INLINE
104 void
OSWriteSwapInt64(volatile void * base,uintptr_t byteOffset,uint64_t data)105 OSWriteSwapInt64(
106 volatile void * base,
107 uintptr_t byteOffset,
108 uint64_t data
109 )
110 {
111 *(volatile uint64_t *)((uintptr_t)base + byteOffset) = _OSSwapInt64(data);
112 }
113
114 #endif /* defined(__i386__) || defined(__x86_64__) */
115
116 #endif /* ! _OS_OSBYTEORDERI386_H */
117