gen/libsa/io_inline.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1992 NeXT Computer, Inc.
  27  *
  28  * Inlines for io space access.
  29  *
  30  * HISTORY
  31  *
  32  * 20 May 1992 ? at NeXT
  33  *      Created.
  34  */
  35
  36 #import <architecture/i386/io.h>
  37
  38 #if     !defined(DEFINE_INLINE_FUNCTIONS)
  39 static
  40 #endif
  41 inline
  42 unsigned char
  43 inb(
  44     io_addr_t           port
  45 )
  46 {
  47     unsigned char       data;
  48
  49     asm volatile(
  50         "inb %1,%0"
  51
  52         : "=a" (data)
  53         : "d" (port));
  54
  55     return (data);
  56 }
  57
  58 #if     !defined(DEFINE_INLINE_FUNCTIONS)
  59 static
  60 #endif
  61 inline
  62 unsigned short
  63 inw(
  64     io_addr_t           port
  65 )
  66 {
  67     unsigned short      data;
  68
  69     asm volatile(
  70         "inw %1,%0"
  71
  72         : "=a" (data)
  73         : "d" (port));
  74
  75     return (data);
  76 }
  77
  78 #if     !defined(DEFINE_INLINE_FUNCTIONS)
  79 static
  80 #endif
  81 inline
  82 void
  83 outb(
  84     io_addr_t           port,
  85     unsigned char       data
  86 )
  87 {
  88     static int          xxx;
  89
  90     asm volatile(
  91         "outb %2,%1; lock; incl %0"
  92
  93         : "=m" (xxx)
  94         : "d" (port), "a" (data), "0" (xxx)
  95         : "cc");
  96 }
  97
  98 #if     !defined(DEFINE_INLINE_FUNCTIONS)
  99 static
 100 #endif
 101 inline
 102 void
 103 outw(
 104     io_addr_t           port,
 105     unsigned short      data
 106 )
 107 {
 108     static int          xxx;
 109
 110     asm volatile(
 111         "outw %2,%1; lock; incl %0"
 112
 113         : "=m" (xxx)
 114         : "d" (port), "a" (data), "0" (xxx)
 115         : "cc");
 116 }
 117