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
38OS_INLINE
39uint16_t
40OSReadSwapInt16(
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
51OS_INLINE
52uint32_t
53OSReadSwapInt32(
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
64OS_INLINE
65uint64_t
66OSReadSwapInt64(
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
79OS_INLINE
80void
81OSWriteSwapInt16(
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
90OS_INLINE
91void
92OSWriteSwapInt32(
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
101OS_INLINE
102void
103OSWriteSwapInt64(
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