Subversion Repositories openrisc_2011-10-31

/*

 *  This file contains a typical set of register access routines which may be

 *  used with the z85c30 chip if accesses to the chip are as follows:

 *

 *    + registers are accessed as bytes

 *

 *  COPYRIGHT (c) 1989-1997.

 *  On-Line Applications Research Corporation (OAR).

 *  Copyright assigned to U.S. Government, 1994.

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  $Id: z85c30_reg.c,v 1.2 2001-09-27 12:01:42 chris Exp $

 */

#include <rtems.h>

#ifndef _Z85C30_MULTIPLIER

#define _Z85C30_MULTIPLIER 1

#define _Z85C30_NAME(_X) _X

#define _Z85C30_TYPE unsigned8

#endif

/*

 *  Z85C30 Get Register Routine

 */

unsigned8 _Z85C30_NAME(z85c30_get_register)(

  unsigned32  ulCtrlPort,

  unsigned8   ucRegNum

)

{

  _Z85C30_TYPE          *port;

  unsigned8              data;

  rtems_interrupt_level  level;

  port = (_Z85C30_TYPE *)ulCtrlPort;

  rtems_interrupt_disable(level);

    if(ucRegNum) {

      *port = ucRegNum;

    }

    data = *port;

  rtems_interrupt_enable(level);

  return data;

}

/*

 *  Z85C30 Set Register Routine

 */

void _Z85C30_NAME(z85c30_set_register)(

  unsigned32  ulCtrlPort,

  unsigned8   ucRegNum,

  unsigned8   ucData

)

{

  _Z85C30_TYPE          *port;

  rtems_interrupt_level  level;

  port = (_Z85C30_TYPE *)ulCtrlPort;

  rtems_interrupt_disable(level);

    if(ucRegNum) {

      *port = ucRegNum;

    }

    *port = ucData;

  rtems_interrupt_enable(level);

}