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
 40OS_INLINE
 41uint16_t
 42OSReadSwapInt16(
 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
 53OS_INLINE
 54uint32_t
 55OSReadSwapInt32(
 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
 66OS_INLINE
 67uint64_t
 68OSReadSwapInt64(
 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
 81OS_INLINE
 82void
 83OSWriteSwapInt16(
 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
 92OS_INLINE
 93void
 94OSWriteSwapInt32(
 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
103OS_INLINE
104void
105OSWriteSwapInt64(
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 */