1 /*
2 * Copyright (c) 1999-2006 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 #include <stdint.h>
33 #include <libkern/i386/_OSByteOrder.h>
34 #include <sys/_types/_os_inline.h>
35
36 /* Functions for byte reversed loads. */
37
38 OS_INLINE
39 uint16_t
OSReadSwapInt16(const volatile void * base,uintptr_t byteOffset)40 OSReadSwapInt16(
41 const volatile void * base,
42 uintptr_t byteOffset
43 )
44 {
45 uint16_t result;
46
47 result = *(volatile uint16_t *)((uintptr_t)base + byteOffset);
48 return _OSSwapInt16(result);
49 }
50
51 OS_INLINE
52 uint32_t
OSReadSwapInt32(const volatile void * base,uintptr_t byteOffset)53 OSReadSwapInt32(
54 const volatile void * base,
55 uintptr_t byteOffset
56 )
57 {
58 uint32_t result;
59
60 result = *(volatile uint32_t *)((uintptr_t)base + byteOffset);
61 return _OSSwapInt32(result);
62 }
63
64 OS_INLINE
65 uint64_t
OSReadSwapInt64(const volatile void * base,uintptr_t byteOffset)66 OSReadSwapInt64(
67 const volatile void * base,
68 uintptr_t byteOffset
69 )
70 {
71 uint64_t result;
72
73 result = *(volatile uint64_t *)((uintptr_t)base + byteOffset);
74 return _OSSwapInt64(result);
75 }
76
77 /* Functions for byte reversed stores. */
78
79 OS_INLINE
80 void
OSWriteSwapInt16(volatile void * base,uintptr_t byteOffset,uint16_t data)81 OSWriteSwapInt16(
82 volatile void * base,
83 uintptr_t byteOffset,
84 uint16_t data
85 )
86 {
87 *(volatile uint16_t *)((uintptr_t)base + byteOffset) = _OSSwapInt16(data);
88 }
89
90 OS_INLINE
91 void
OSWriteSwapInt32(volatile void * base,uintptr_t byteOffset,uint32_t data)92 OSWriteSwapInt32(
93 volatile void * base,
94 uintptr_t byteOffset,
95 uint32_t data
96 )
97 {
98 *(volatile uint32_t *)((uintptr_t)base + byteOffset) = _OSSwapInt32(data);
99 }
100
101 OS_INLINE
102 void
OSWriteSwapInt64(volatile void * base,uintptr_t byteOffset,uint64_t data)103 OSWriteSwapInt64(
104 volatile void * base,
105 uintptr_t byteOffset,
106 uint64_t data
107 )
108 {
109 *(volatile uint64_t *)((uintptr_t)base + byteOffset) = _OSSwapInt64(data);
110 }
111
112 #endif /* ! _OS_OSBYTEORDERI386_H */
113