gen/libsa/io_inline.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1992 NeXT Computer, Inc.
  26  *
  27  * Inlines for io space access.
  28  *
  29  * HISTORY
  30  *
  31  * 20 May 1992 ? at NeXT
  32  *      Created.
  33  */
  34
  35 #import <architecture/i386/io.h>
  36
  37 #if     !defined(DEFINE_INLINE_FUNCTIONS)
  38 static
  39 #endif
  40 inline
  41 unsigned char
  42 inb(
  43     io_addr_t           port
  44 )
  45 {
  46     unsigned char       data;
  47
  48     asm volatile(
  49         "inb %1,%0"
  50
  51         : "=a" (data)
  52         : "d" (port));
  53
  54     return (data);
  55 }
  56
  57 #if     !defined(DEFINE_INLINE_FUNCTIONS)
  58 static
  59 #endif
  60 inline
  61 unsigned short
  62 inw(
  63     io_addr_t           port
  64 )
  65 {
  66     unsigned short      data;
  67
  68     asm volatile(
  69         "inw %1,%0"
  70
  71         : "=a" (data)
  72         : "d" (port));
  73
  74     return (data);
  75 }
  76
  77 #if     !defined(DEFINE_INLINE_FUNCTIONS)
  78 static
  79 #endif
  80 inline
  81 void
  82 outb(
  83     io_addr_t           port,
  84     unsigned char       data
  85 )
  86 {
  87     static int          xxx;
  88
  89     asm volatile(
  90         "outb %2,%1; lock; incl %0"
  91
  92         : "=m" (xxx)
  93         : "d" (port), "a" (data), "0" (xxx)
  94         : "cc");
  95 }
  96
  97 #if     !defined(DEFINE_INLINE_FUNCTIONS)
  98 static
  99 #endif
 100 inline
 101 void
 102 outw(
 103     io_addr_t           port,
 104     unsigned short      data
 105 )
 106 {
 107     static int          xxx;
 108
 109     asm volatile(
 110         "outw %2,%1; lock; incl %0"
 111
 112         : "=m" (xxx)
 113         : "d" (port), "a" (data), "0" (xxx)
 114         : "cc");
 115 }
 116