EXTERNAL_HEADERS/architecture/i386/pio.h

   1 /*
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  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990 Carnegie Mellon University
  34  * All Rights Reserved.
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  36  * Permission to use, copy, modify and distribute this software and its
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  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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  46  * Carnegie Mellon requests users of this software to return to
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  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
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  55  */
  56 /*
  57  */
  58 #ifndef _ARCH_I386_PIO_H_
  59 #define _ARCH_I386_PIO_H_
  60
  61 typedef unsigned short i386_ioport_t;
  62
  63 #if defined(__GNUC__)
  64 static __inline__ unsigned long inl(
  65                                 i386_ioport_t port)
  66 {
  67         unsigned long datum;
  68         __asm__ volatile("inl %w1, %0" : "=a" (datum) : "Nd" (port));
  69         return(datum);
  70 }
  71
  72 static __inline__ unsigned short inw(
  73                                 i386_ioport_t port)
  74 {
  75         unsigned short datum;
  76         __asm__ volatile("inw %w1, %w0" : "=a" (datum) : "Nd" (port));
  77         return(datum);
  78 }
  79
  80 static __inline__ unsigned char inb(
  81                                 i386_ioport_t port)
  82 {
  83         unsigned char datum;
  84         __asm__ volatile("inb %w1, %b0" : "=a" (datum) : "Nd" (port));
  85         return(datum);
  86 }
  87
  88 static __inline__ void outl(
  89                                 i386_ioport_t port,
  90                                 unsigned long datum)
  91 {
  92         __asm__ volatile("outl %0, %w1" : : "a" (datum), "Nd" (port));
  93 }
  94
  95 static __inline__ void outw(
  96                                 i386_ioport_t port,
  97                                 unsigned short datum)
  98 {
  99         __asm__ volatile("outw %w0, %w1" : : "a" (datum), "Nd" (port));
 100 }
 101
 102 static __inline__ void outb(
 103                                 i386_ioport_t port,
 104                                 unsigned char datum)
 105 {
 106         __asm__ volatile("outb %b0, %w1" : : "a" (datum), "Nd" (port));
 107 }
 108 #endif /* defined(__GNUC__) */
 109 #endif /* _ARCH_I386_PIO_H_ */