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                 : 
      35                 : #if !defined(OS_INLINE)
      36                 : #define OS_INLINE       __DARWIN_OS_INLINE
      37                 : #endif
      38                 : 
      39                 : /* Functions for byte reversed loads. */
      40                 : 
      41                 : OS_INLINE
      42                 : uint16_t
      43                 : OSReadSwapInt16(
      44                 :     const volatile void   * base,
      45                 :     uintptr_t       byteOffset
      46                 : )
      47                 : {
      48                 :     uint16_t result;
      49                 : 
      50                 :     result = *(volatile uint16_t *)((uintptr_t)base + byteOffset);
      51                 :     return _OSSwapInt16(result);
      52                 : }
      53                 : 
      54                 : OS_INLINE
      55                 : uint32_t
      56                 : OSReadSwapInt32(
      57               0 :     const volatile void   * base,
      58               0 :     uintptr_t       byteOffset
      59                 : )
      60                 : {
      61               0 :     uint32_t result;
      62                 : 
      63               0 :     result = *(volatile uint32_t *)((uintptr_t)base + byteOffset);
      64               0 :     return _OSSwapInt32(result);
      65                 : }
      66                 : 
      67                 : OS_INLINE
      68                 : uint64_t
      69                 : OSReadSwapInt64(
      70                 :     const volatile void   * base,
      71                 :     uintptr_t       byteOffset
      72                 : )
      73                 : {
      74                 :     uint64_t result;
      75                 : 
      76                 :     result = *(volatile uint64_t *)((uintptr_t)base + byteOffset);
      77                 :     return _OSSwapInt64(result);
      78                 : }
      79                 : 
      80                 : /* Functions for byte reversed stores. */
      81                 : 
      82                 : OS_INLINE
      83                 : void
      84                 : OSWriteSwapInt16(
      85                 :     volatile void   * base,
      86                 :     uintptr_t       byteOffset,
      87                 :     uint16_t        data
      88                 : )
      89                 : {
      90                 :     *(volatile uint16_t *)((uintptr_t)base + byteOffset) = _OSSwapInt16(data);
      91                 : }
      92                 : 
      93                 : OS_INLINE
      94                 : void
      95                 : OSWriteSwapInt32(
      96                 :     volatile void   * base,
      97                 :     uintptr_t       byteOffset,
      98                 :     uint32_t        data
      99                 : )
     100                 : {
     101                 :     *(volatile uint32_t *)((uintptr_t)base + byteOffset) = _OSSwapInt32(data);
     102                 : }
     103                 : 
     104                 : OS_INLINE
     105                 : void
     106                 : OSWriteSwapInt64(
     107                 :     volatile void    * base,
     108                 :     uintptr_t        byteOffset,
     109                 :     uint64_t         data
     110                 : )
     111                 : {
     112                 :     *(volatile uint64_t *)((uintptr_t)base + byteOffset) = _OSSwapInt64(data);
     113                 : }
     114                 : 
     115                 : #endif /* ! _OS_OSBYTEORDERI386_H */