io.c

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/*****************************************************************************************
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 All rights reserved.

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 conditions, the following disclaimer and the list of authors.  Redistributions in binary
 form must reproduce the above copyright notice, this list of conditions, the following
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 contributors may be used to endorse or promote products derived from this software
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 OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 $Id$

*****************************************************************************************/

#include <sys/io.h>

/************************************************************************

Function: inline unsigned char inportByte(unsigned int port);
Description: This Funciton Will Input One Byte From A Port
Notes:

************************************************************************/
unsigned char inportByte(unsigned int port) {
  unsigned char retVal;
  asm volatile(
    "inb %%dx,%%al"
    : "=a" (retVal)
    : "d" (port)
    );
  return(retVal);
  }

/************************************************************************

Function: inline unsigned char inportWord(unsigned int port);
Description: This Funciton Will Input One Word From A Port
Notes:

************************************************************************/  
unsigned short inportWord(unsigned int port) {
  unsigned short retVal;
  asm volatile(
    "inw %%dx,%%ax"
    : "=a" (retVal)
    : "d" (port)
    );
  return(retVal);
  }

/************************************************************************

Function: inline void outportByte(unsigned int port,unsigned char value);
Description: This Funciton Will Outputut One Byte To A Port
Notes:

************************************************************************/
void outportByte(unsigned int port,unsigned char value) {
  asm volatile(
    "outb %%al,%%dx"
    :
    : "d" (port), "a" (value)
    );
  }

/************************************************************************

Function: inline void outportByteP(unsigned int port,unsigned char value);
Description: This Funciton Will Outputut One Byte To A Port With A Delay
Notes:

************************************************************************/
void outportByteP(unsigned int port,unsigned char value) {
  asm volatile(
    "outb %%al,%%dx\n"
    "outb %%al,$0x80\n"
    :
    : "d" (port), "a" (value)
    );
  }  

/************************************************************************

Function: inline void outportWord(unsigned int port,unsigned char value);
Description: This Funciton Will Outputut One Word To A Port
Notes:

************************************************************************/
void outportWord(unsigned int port,unsigned short value) {
  asm volatile(
    "outw %%ax,%%dx"
    :
    : "d" (port), "a" (value)
    );
  }

/************************************************************************

Function: inline void outportDWord(unsigned int port,unsigned char value);
Description: This Funciton Will Outputut One DWord To A Port
Notes:

************************************************************************/
void outportDWord(unsigned int port,unsigned long value) {
  asm volatile(
    "outl %%eax,%%dx"
    :
    : "d" (port), "a" (value)
    );
  }

/************************************************************************

Function: inline unsigned char inportDWord(unsigned int port);
Description: This Funciton Will Input One DWord From A Port
Notes:

************************************************************************/
unsigned long inportDWord(unsigned int port) {
  unsigned long retVal;
  asm volatile(
    "inl %%dx,%%eax"
    : "=a" (retVal)
    : "d" (port)
    );
  return(retVal);
  }

/***
 END
 ***/

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