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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(__ppc__) || defined(__ppc64__))␊
43#include <libkern/ppc/OSByteOrder.h>␊
44#elif (defined(__i386__) || defined(__x86_64__))␊
45#include <libkern/i386/OSByteOrder.h>␊
46#elif defined(__arm__)␊
47#include <libkern/arm/OSByteOrder.h>␊
48#else␊
49#include <libkern/machine/OSByteOrder.h>␊
50#endif␊
51␊
52#else /* ! __GNUC__ */␊
53␊
54#include <libkern/machine/OSByteOrder.h>␊
55␊
56#endif /* __GNUC__ */␊
57␊
58#define OSSwapInt16(x)␉__DARWIN_OSSwapInt16(x)␊
59#define OSSwapInt32(x)␉__DARWIN_OSSwapInt32(x)␊
60#define OSSwapInt64(x)␉__DARWIN_OSSwapInt64(x)␊
61␊
62enum {␊
63 OSUnknownByteOrder,␊
64 OSLittleEndian,␊
65 OSBigEndian␊
66};␊
67␊
68OS_INLINE␊
69int32_t␊
70OSHostByteOrder(void) {␊
71#if defined(__LITTLE_ENDIAN__)␊
72 return OSLittleEndian;␊
73#elif defined(__BIG_ENDIAN__)␊
74 return OSBigEndian;␊
75#else␊
76 return OSUnknownByteOrder;␊
77#endif␊
78}␊
79␊
80#define OSReadBigInt(x, y)␉␉OSReadBigInt32(x, y)␊
81#define OSWriteBigInt(x, y, z)␉␉OSWriteBigInt32(x, y, z)␊
82#define OSSwapBigToHostInt(x)␉␉OSSwapBigToHostInt32(x)␊
83#define OSSwapHostToBigInt(x)␉␉OSSwapHostToBigInt32(x)␊
84#define OSReadLittleInt(x, y)␉␉OSReadLittleInt32(x, y)␊
85#define OSWriteLittleInt(x, y, z)␉OSWriteLittleInt32(x, y, z)␊
86#define OSSwapHostToLittleInt(x)␉OSSwapHostToLittleInt32(x)␊
87#define OSSwapLittleToHostInt(x)␉OSSwapLittleToHostInt32(x)␊
88␊
89/* Functions for loading native endian values. */␊
90␊
91OS_INLINE␊
92uint16_t␊
93_OSReadInt16(␊
94 const volatile void * base,␊
95 uintptr_t byteOffset␊
96)␊
97{␊
98 return *(volatile uint16_t *)((uintptr_t)base + byteOffset);␊
99}␊
100␊
101OS_INLINE␊
102uint32_t␊
103_OSReadInt32(␊
104 const volatile void * base,␊
105 uintptr_t byteOffset␊
106)␊
107{␊
108 return *(volatile uint32_t *)((uintptr_t)base + byteOffset);␊
109}␊
110␊
111OS_INLINE␊
112uint64_t␊
113_OSReadInt64(␊
114 const volatile void * base,␊
115 uintptr_t byteOffset␊
116)␊
117{␊
118 return *(volatile uint64_t *)((uintptr_t)base + byteOffset);␊
119}␊
120␊
121/* Functions for storing native endian values. */␊
122␊
123OS_INLINE␊
124void␊
125_OSWriteInt16(␊
126 volatile void * base,␊
127 uintptr_t byteOffset,␊
128 uint16_t data␊
129)␊
130{␊
131 *(volatile uint16_t *)((uintptr_t)base + byteOffset) = data;␊
132}␊
133␊
134OS_INLINE␊
135void␊
136_OSWriteInt32(␊
137 volatile void * base,␊
138 uintptr_t byteOffset,␊
139 uint32_t data␊
140)␊
141{␊
142 *(volatile uint32_t *)((uintptr_t)base + byteOffset) = data;␊
143}␊
144␊
145OS_INLINE␊
146void␊
147_OSWriteInt64(␊
148 volatile void * base,␊
149 uintptr_t byteOffset,␊
150 uint64_t data␊
151)␊
152{␊
153 *(volatile uint64_t *)((uintptr_t)base + byteOffset) = data;␊
154}␊
155␊
156#if␉␉defined(__BIG_ENDIAN__)␊
157␊
158/* Functions for loading big endian to host endianess. */␊
159␊
160#define OSReadBigInt16(base, byteOffset) _OSReadInt16(base, byteOffset)␊
161#define OSReadBigInt32(base, byteOffset) _OSReadInt32(base, byteOffset)␊
162#define OSReadBigInt64(base, byteOffset) _OSReadInt64(base, byteOffset)␊
163␊
164/* Functions for storing host endianess to big endian. */␊
165␊
166#define OSWriteBigInt16(base, byteOffset, data) _OSWriteInt16(base, byteOffset, data)␊
167#define OSWriteBigInt32(base, byteOffset, data) _OSWriteInt32(base, byteOffset, data)␊
168#define OSWriteBigInt64(base, byteOffset, data) _OSWriteInt64(base, byteOffset, data)␊
169␊
170/* Functions for loading little endian to host endianess. */␊
171␊
172#define OSReadLittleInt16(base, byteOffset) OSReadSwapInt16(base, byteOffset)␊
173#define OSReadLittleInt32(base, byteOffset) OSReadSwapInt32(base, byteOffset)␊
174#define OSReadLittleInt64(base, byteOffset) OSReadSwapInt64(base, byteOffset)␊
175␊
176/* Functions for storing host endianess to little endian. */␊
177␊
178#define OSWriteLittleInt16(base, byteOffset, data) OSWriteSwapInt16(base, byteOffset, data)␊
179#define OSWriteLittleInt32(base, byteOffset, data) OSWriteSwapInt32(base, byteOffset, data)␊
180#define OSWriteLittleInt64(base, byteOffset, data) OSWriteSwapInt64(base, byteOffset, data)␊
181␊
182/* Host endianess to big endian byte swapping macros for constants. */␊
183␊
184#define OSSwapHostToBigConstInt16(x) ((uint16_t)(x))␊
185#define OSSwapHostToBigConstInt32(x) ((uint32_t)(x))␊
186#define OSSwapHostToBigConstInt64(x) ((uint64_t)(x))␊
187␊
188/* Generic host endianess to big endian byte swapping functions. */␊
189␊
190#define OSSwapHostToBigInt16(x) ((uint16_t)(x))␊
191#define OSSwapHostToBigInt32(x) ((uint32_t)(x))␊
192#define OSSwapHostToBigInt64(x) ((uint64_t)(x))␊
193␊
194/* Host endianess to little endian byte swapping macros for constants. */␊
195␊
196#define OSSwapHostToLittleConstInt16(x) OSSwapConstInt16(x)␊
197#define OSSwapHostToLittleConstInt32(x) OSSwapConstInt32(x) ␊
198#define OSSwapHostToLittleConstInt64(x) OSSwapConstInt64(x) ␊
199␊
200/* Generic host endianess to little endian byte swapping functions. */␊
201␊
202#define OSSwapHostToLittleInt16(x) OSSwapInt16(x)␊
203#define OSSwapHostToLittleInt32(x) OSSwapInt32(x)␊
204#define OSSwapHostToLittleInt64(x) OSSwapInt64(x)␊
205␊
206/* Big endian to host endianess byte swapping macros for constants. */␊
207 ␊
208#define OSSwapBigToHostConstInt16(x) ((uint16_t)(x))␊
209#define OSSwapBigToHostConstInt32(x) ((uint32_t)(x))␊
210#define OSSwapBigToHostConstInt64(x) ((uint64_t)(x))␊
211␊
212/* Generic big endian to host endianess byte swapping functions. */␊
213␊
214#define OSSwapBigToHostInt16(x) ((uint16_t)(x))␊
215#define OSSwapBigToHostInt32(x) ((uint32_t)(x))␊
216#define OSSwapBigToHostInt64(x) ((uint64_t)(x))␊
217␊
218/* Little endian to host endianess byte swapping macros for constants. */␊
219 ␊
220#define OSSwapLittleToHostConstInt16(x) OSSwapConstInt16(x)␊
221#define OSSwapLittleToHostConstInt32(x) OSSwapConstInt32(x)␊
222#define OSSwapLittleToHostConstInt64(x) OSSwapConstInt64(x)␊
223␊
224/* Generic little endian to host endianess byte swapping functions. */␊
225␊
226#define OSSwapLittleToHostInt16(x) OSSwapInt16(x)␊
227#define OSSwapLittleToHostInt32(x) OSSwapInt32(x)␊
228#define OSSwapLittleToHostInt64(x) OSSwapInt64(x)␊
229␊
230#elif␉␉defined(__LITTLE_ENDIAN__)␊
231␊
232/* Functions for loading big endian to host endianess. */␊
233␊
234#define OSReadBigInt16(base, byteOffset) OSReadSwapInt16(base, byteOffset)␊
235#define OSReadBigInt32(base, byteOffset) OSReadSwapInt32(base, byteOffset)␊
236#define OSReadBigInt64(base, byteOffset) OSReadSwapInt64(base, byteOffset)␊
237␊
238/* Functions for storing host endianess to big endian. */␊
239␊
240#define OSWriteBigInt16(base, byteOffset, data) OSWriteSwapInt16(base, byteOffset, data)␊
241#define OSWriteBigInt32(base, byteOffset, data) OSWriteSwapInt32(base, byteOffset, data)␊
242#define OSWriteBigInt64(base, byteOffset, data) OSWriteSwapInt64(base, byteOffset, data)␊
243␊
244/* Functions for loading little endian to host endianess. */␊
245␊
246#define OSReadLittleInt16(base, byteOffset) _OSReadInt16(base, byteOffset)␊
247#define OSReadLittleInt32(base, byteOffset) _OSReadInt32(base, byteOffset)␊
248#define OSReadLittleInt64(base, byteOffset) _OSReadInt64(base, byteOffset)␊
249␊
250/* Functions for storing host endianess to little endian. */␊
251␊
252#define OSWriteLittleInt16(base, byteOffset, data) _OSWriteInt16(base, byteOffset, data)␊
253#define OSWriteLittleInt32(base, byteOffset, data) _OSWriteInt32(base, byteOffset, data)␊
254#define OSWriteLittleInt64(base, byteOffset, data) _OSWriteInt64(base, byteOffset, data)␊
255␊
256/* Host endianess to big endian byte swapping macros for constants. */␊
257␊
258#define OSSwapHostToBigConstInt16(x) OSSwapConstInt16(x)␊
259#define OSSwapHostToBigConstInt32(x) OSSwapConstInt32(x)␊
260#define OSSwapHostToBigConstInt64(x) OSSwapConstInt64(x)␊
261␊
262/* Generic host endianess to big endian byte swapping functions. */␊
263␊
264#define OSSwapHostToBigInt16(x) OSSwapInt16(x)␊
265#define OSSwapHostToBigInt32(x) OSSwapInt32(x)␊
266#define OSSwapHostToBigInt64(x) OSSwapInt64(x)␊
267␊
268/* Host endianess to little endian byte swapping macros for constants. */␊
269␊
270#define OSSwapHostToLittleConstInt16(x) ((uint16_t)(x))␊
271#define OSSwapHostToLittleConstInt32(x) ((uint32_t)(x))␊
272#define OSSwapHostToLittleConstInt64(x) ((uint64_t)(x)) ␊
273␊
274/* Generic host endianess to little endian byte swapping functions. */␊
275␊
276#define OSSwapHostToLittleInt16(x) ((uint16_t)(x))␊
277#define OSSwapHostToLittleInt32(x) ((uint32_t)(x))␊
278#define OSSwapHostToLittleInt64(x) ((uint64_t)(x))␊
279␊
280/* Big endian to host endianess byte swapping macros for constants. */␊
281␊
282#define OSSwapBigToHostConstInt16(x) OSSwapConstInt16(x)␊
283#define OSSwapBigToHostConstInt32(x) OSSwapConstInt32(x)␊
284#define OSSwapBigToHostConstInt64(x) OSSwapConstInt64(x)␊
285␊
286/* Generic big endian to host endianess byte swapping functions. */␊
287␊
288#define OSSwapBigToHostInt16(x) OSSwapInt16(x)␊
289#define OSSwapBigToHostInt32(x) OSSwapInt32(x)␊
290#define OSSwapBigToHostInt64(x) OSSwapInt64(x)␊
291␊
292/* Little endian to host endianess byte swapping macros for constants. */␊
293␊
294#define OSSwapLittleToHostConstInt16(x) ((uint16_t)(x))␊
295#define OSSwapLittleToHostConstInt32(x) ((uint32_t)(x))␊
296#define OSSwapLittleToHostConstInt64(x) ((uint64_t)(x))␊
297␊
298/* Generic little endian to host endianess byte swapping functions. */␊
299␊
300#define OSSwapLittleToHostInt16(x) ((uint16_t)(x))␊
301#define OSSwapLittleToHostInt32(x) ((uint32_t)(x))␊
302#define OSSwapLittleToHostInt64(x) ((uint64_t)(x))␊
303␊
304#else␊
305#error Unknown endianess.␊
306#endif␊
307␊
308#endif /* ! _OS_OSBYTEORDER_H */␊
309␊
310␊
311

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