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1/*␊
2 * Copyright (c) 2000-2006 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_OSBYTEORDER_H␊
30#define _OS_OSBYTEORDER_H␊
31␊
32#include <stdint.h>␊
33#include <libkern/_OSByteOrder.h>␊
34␊
35/* Macros for swapping constant values in the preprocessing stage. */␊
36#define OSSwapConstInt16(x)␉__DARWIN_OSSwapConstInt16(x)␊
37#define OSSwapConstInt32(x)␉__DARWIN_OSSwapConstInt32(x)␊
38#define OSSwapConstInt64(x)␉__DARWIN_OSSwapConstInt64(x)␊
39␊
40#if defined(__GNUC__)␊
41␊
42#if (defined(__i386__) || defined(__x86_64__))␊
43#include <libkern/i386/OSByteOrder.h>␊
44#elif defined (__arm__)␊
45#include <libkern/arm/OSByteOrder.h>␊
46#else␊
47#include <libkern/machine/OSByteOrder.h>␊
48#endif␊
49␊
50#else /* ! __GNUC__ */␊
51␊
52#include <libkern/machine/OSByteOrder.h>␊
53␊
54#endif /* __GNUC__ */␊
55␊
56#define OSSwapInt16(x)␉__DARWIN_OSSwapInt16(x)␊
57#define OSSwapInt32(x)␉__DARWIN_OSSwapInt32(x)␊
58#define OSSwapInt64(x)␉__DARWIN_OSSwapInt64(x)␊
59␊
60enum {␊
61 OSUnknownByteOrder,␊
62 OSLittleEndian,␊
63 OSBigEndian␊
64};␊
65␊
66OS_INLINE␊
67int32_t␊
68OSHostByteOrder(void) {␊
69#if defined(__LITTLE_ENDIAN__)␊
70 return OSLittleEndian;␊
71#elif defined(__BIG_ENDIAN__)␊
72 return OSBigEndian;␊
73#else␊
74 return OSUnknownByteOrder;␊
75#endif␊
76}␊
77␊
78#define OSReadBigInt(x, y)␉␉OSReadBigInt32(x, y)␊
79#define OSWriteBigInt(x, y, z)␉␉OSWriteBigInt32(x, y, z)␊
80#define OSSwapBigToHostInt(x)␉␉OSSwapBigToHostInt32(x)␊
81#define OSSwapHostToBigInt(x)␉␉OSSwapHostToBigInt32(x)␊
82#define OSReadLittleInt(x, y)␉␉OSReadLittleInt32(x, y)␊
83#define OSWriteLittleInt(x, y, z)␉OSWriteLittleInt32(x, y, z)␊
84#define OSSwapHostToLittleInt(x)␉OSSwapHostToLittleInt32(x)␊
85#define OSSwapLittleToHostInt(x)␉OSSwapLittleToHostInt32(x)␊
86␊
87/* Functions for loading native endian values. */␊
88␊
89OS_INLINE␊
90uint16_t␊
91_OSReadInt16(␊
92 const volatile void * base,␊
93 uintptr_t byteOffset␊
94)␊
95{␊
96 return *(volatile uint16_t *)((uintptr_t)base + byteOffset);␊
97}␊
98␊
99OS_INLINE␊
100uint32_t␊
101_OSReadInt32(␊
102 const volatile void * base,␊
103 uintptr_t byteOffset␊
104)␊
105{␊
106 return *(volatile uint32_t *)((uintptr_t)base + byteOffset);␊
107}␊
108␊
109OS_INLINE␊
110uint64_t␊
111_OSReadInt64(␊
112 const volatile void * base,␊
113 uintptr_t byteOffset␊
114)␊
115{␊
116 return *(volatile uint64_t *)((uintptr_t)base + byteOffset);␊
117}␊
118␊
119/* Functions for storing native endian values. */␊
120␊
121OS_INLINE␊
122void␊
123_OSWriteInt16(␊
124 volatile void * base,␊
125 uintptr_t byteOffset,␊
126 uint16_t data␊
127)␊
128{␊
129 *(volatile uint16_t *)((uintptr_t)base + byteOffset) = data;␊
130}␊
131␊
132OS_INLINE␊
133void␊
134_OSWriteInt32(␊
135 volatile void * base,␊
136 uintptr_t byteOffset,␊
137 uint32_t data␊
138)␊
139{␊
140 *(volatile uint32_t *)((uintptr_t)base + byteOffset) = data;␊
141}␊
142␊
143OS_INLINE␊
144void␊
145_OSWriteInt64(␊
146 volatile void * base,␊
147 uintptr_t byteOffset,␊
148 uint64_t data␊
149)␊
150{␊
151 *(volatile uint64_t *)((uintptr_t)base + byteOffset) = data;␊
152}␊
153␊
154#if␉␉defined(__BIG_ENDIAN__)␊
155␊
156/* Functions for loading big endian to host endianess. */␊
157␊
158#define OSReadBigInt16(base, byteOffset) _OSReadInt16(base, byteOffset)␊
159#define OSReadBigInt32(base, byteOffset) _OSReadInt32(base, byteOffset)␊
160#define OSReadBigInt64(base, byteOffset) _OSReadInt64(base, byteOffset)␊
161␊
162/* Functions for storing host endianess to big endian. */␊
163␊
164#define OSWriteBigInt16(base, byteOffset, data) _OSWriteInt16(base, byteOffset, data)␊
165#define OSWriteBigInt32(base, byteOffset, data) _OSWriteInt32(base, byteOffset, data)␊
166#define OSWriteBigInt64(base, byteOffset, data) _OSWriteInt64(base, byteOffset, data)␊
167␊
168/* Functions for loading little endian to host endianess. */␊
169␊
170#define OSReadLittleInt16(base, byteOffset) OSReadSwapInt16(base, byteOffset)␊
171#define OSReadLittleInt32(base, byteOffset) OSReadSwapInt32(base, byteOffset)␊
172#define OSReadLittleInt64(base, byteOffset) OSReadSwapInt64(base, byteOffset)␊
173␊
174/* Functions for storing host endianess to little endian. */␊
175␊
176#define OSWriteLittleInt16(base, byteOffset, data) OSWriteSwapInt16(base, byteOffset, data)␊
177#define OSWriteLittleInt32(base, byteOffset, data) OSWriteSwapInt32(base, byteOffset, data)␊
178#define OSWriteLittleInt64(base, byteOffset, data) OSWriteSwapInt64(base, byteOffset, data)␊
179␊
180/* Host endianess to big endian byte swapping macros for constants. */␊
181␊
182#define OSSwapHostToBigConstInt16(x) ((uint16_t)(x))␊
183#define OSSwapHostToBigConstInt32(x) ((uint32_t)(x))␊
184#define OSSwapHostToBigConstInt64(x) ((uint64_t)(x))␊
185␊
186/* Generic host endianess to big endian byte swapping functions. */␊
187␊
188#define OSSwapHostToBigInt16(x) ((uint16_t)(x))␊
189#define OSSwapHostToBigInt32(x) ((uint32_t)(x))␊
190#define OSSwapHostToBigInt64(x) ((uint64_t)(x))␊
191␊
192/* Host endianess to little endian byte swapping macros for constants. */␊
193␊
194#define OSSwapHostToLittleConstInt16(x) OSSwapConstInt16(x)␊
195#define OSSwapHostToLittleConstInt32(x) OSSwapConstInt32(x) ␊
196#define OSSwapHostToLittleConstInt64(x) OSSwapConstInt64(x) ␊
197␊
198/* Generic host endianess to little endian byte swapping functions. */␊
199␊
200#define OSSwapHostToLittleInt16(x) OSSwapInt16(x)␊
201#define OSSwapHostToLittleInt32(x) OSSwapInt32(x)␊
202#define OSSwapHostToLittleInt64(x) OSSwapInt64(x)␊
203␊
204/* Big endian to host endianess byte swapping macros for constants. */␊
205 ␊
206#define OSSwapBigToHostConstInt16(x) ((uint16_t)(x))␊
207#define OSSwapBigToHostConstInt32(x) ((uint32_t)(x))␊
208#define OSSwapBigToHostConstInt64(x) ((uint64_t)(x))␊
209␊
210/* Generic big endian to host endianess byte swapping functions. */␊
211␊
212#define OSSwapBigToHostInt16(x) ((uint16_t)(x))␊
213#define OSSwapBigToHostInt32(x) ((uint32_t)(x))␊
214#define OSSwapBigToHostInt64(x) ((uint64_t)(x))␊
215␊
216/* Little endian to host endianess byte swapping macros for constants. */␊
217 ␊
218#define OSSwapLittleToHostConstInt16(x) OSSwapConstInt16(x)␊
219#define OSSwapLittleToHostConstInt32(x) OSSwapConstInt32(x)␊
220#define OSSwapLittleToHostConstInt64(x) OSSwapConstInt64(x)␊
221␊
222/* Generic little endian to host endianess byte swapping functions. */␊
223␊
224#define OSSwapLittleToHostInt16(x) OSSwapInt16(x)␊
225#define OSSwapLittleToHostInt32(x) OSSwapInt32(x)␊
226#define OSSwapLittleToHostInt64(x) OSSwapInt64(x)␊
227␊
228#elif␉␉defined(__LITTLE_ENDIAN__)␊
229␊
230/* Functions for loading big endian to host endianess. */␊
231␊
232#define OSReadBigInt16(base, byteOffset) OSReadSwapInt16(base, byteOffset)␊
233#define OSReadBigInt32(base, byteOffset) OSReadSwapInt32(base, byteOffset)␊
234#define OSReadBigInt64(base, byteOffset) OSReadSwapInt64(base, byteOffset)␊
235␊
236/* Functions for storing host endianess to big endian. */␊
237␊
238#define OSWriteBigInt16(base, byteOffset, data) OSWriteSwapInt16(base, byteOffset, data)␊
239#define OSWriteBigInt32(base, byteOffset, data) OSWriteSwapInt32(base, byteOffset, data)␊
240#define OSWriteBigInt64(base, byteOffset, data) OSWriteSwapInt64(base, byteOffset, data)␊
241␊
242/* Functions for loading little endian to host endianess. */␊
243␊
244#define OSReadLittleInt16(base, byteOffset) _OSReadInt16(base, byteOffset)␊
245#define OSReadLittleInt32(base, byteOffset) _OSReadInt32(base, byteOffset)␊
246#define OSReadLittleInt64(base, byteOffset) _OSReadInt64(base, byteOffset)␊
247␊
248/* Functions for storing host endianess to little endian. */␊
249␊
250#define OSWriteLittleInt16(base, byteOffset, data) _OSWriteInt16(base, byteOffset, data)␊
251#define OSWriteLittleInt32(base, byteOffset, data) _OSWriteInt32(base, byteOffset, data)␊
252#define OSWriteLittleInt64(base, byteOffset, data) _OSWriteInt64(base, byteOffset, data)␊
253␊
254/* Host endianess to big endian byte swapping macros for constants. */␊
255␊
256#define OSSwapHostToBigConstInt16(x) OSSwapConstInt16(x)␊
257#define OSSwapHostToBigConstInt32(x) OSSwapConstInt32(x)␊
258#define OSSwapHostToBigConstInt64(x) OSSwapConstInt64(x)␊
259␊
260/* Generic host endianess to big endian byte swapping functions. */␊
261␊
262#define OSSwapHostToBigInt16(x) OSSwapInt16(x)␊
263#define OSSwapHostToBigInt32(x) OSSwapInt32(x)␊
264#define OSSwapHostToBigInt64(x) OSSwapInt64(x)␊
265␊
266/* Host endianess to little endian byte swapping macros for constants. */␊
267␊
268#define OSSwapHostToLittleConstInt16(x) ((uint16_t)(x))␊
269#define OSSwapHostToLittleConstInt32(x) ((uint32_t)(x))␊
270#define OSSwapHostToLittleConstInt64(x) ((uint64_t)(x)) ␊
271␊
272/* Generic host endianess to little endian byte swapping functions. */␊
273␊
274#define OSSwapHostToLittleInt16(x) ((uint16_t)(x))␊
275#define OSSwapHostToLittleInt32(x) ((uint32_t)(x))␊
276#define OSSwapHostToLittleInt64(x) ((uint64_t)(x))␊
277␊
278/* Big endian to host endianess byte swapping macros for constants. */␊
279␊
280#define OSSwapBigToHostConstInt16(x) OSSwapConstInt16(x)␊
281#define OSSwapBigToHostConstInt32(x) OSSwapConstInt32(x)␊
282#define OSSwapBigToHostConstInt64(x) OSSwapConstInt64(x)␊
283␊
284/* Generic big endian to host endianess byte swapping functions. */␊
285␊
286#define OSSwapBigToHostInt16(x) OSSwapInt16(x)␊
287#define OSSwapBigToHostInt32(x) OSSwapInt32(x)␊
288#define OSSwapBigToHostInt64(x) OSSwapInt64(x)␊
289␊
290/* Little endian to host endianess byte swapping macros for constants. */␊
291␊
292#define OSSwapLittleToHostConstInt16(x) ((uint16_t)(x))␊
293#define OSSwapLittleToHostConstInt32(x) ((uint32_t)(x))␊
294#define OSSwapLittleToHostConstInt64(x) ((uint64_t)(x))␊
295␊
296/* Generic little endian to host endianess byte swapping functions. */␊
297␊
298#define OSSwapLittleToHostInt16(x) ((uint16_t)(x))␊
299#define OSSwapLittleToHostInt32(x) ((uint32_t)(x))␊
300#define OSSwapLittleToHostInt64(x) ((uint64_t)(x))␊
301␊
302#else␊
303#error Unknown endianess.␊
304#endif␊
305␊
306#endif /* ! _OS_OSBYTEORDER_H */␊
307␊
308␊
309

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