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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libchip/] [serial/] [mc68681_reg.c] - Rev 173
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/* * This file contains a typical set of register access routines which may be * used with the mc68681 chip if accesses to the chip are as follows: * * + registers are accessed as bytes * + registers are only byte-aligned (no address gaps) * * 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: mc68681_reg.c,v 1.2 2001-09-27 12:01:42 chris Exp $ */ #include <rtems.h> #ifndef _MC68681_MULTIPLIER #define _MC68681_MULTIPLIER 1 #define _MC68681_NAME(_X) _X #define _MC68681_TYPE unsigned8 #endif #define CALCULATE_REGISTER_ADDRESS( _base, _reg ) \ (_MC68681_TYPE *)((_base) + ((_reg) * _MC68681_MULTIPLIER )) /* * MC68681 Get Register Routine */ unsigned8 _MC68681_NAME(mc68681_get_register)( unsigned32 ulCtrlPort, unsigned8 ucRegNum ) { _MC68681_TYPE *port; port = CALCULATE_REGISTER_ADDRESS( ulCtrlPort, ucRegNum ); return *port; } /* * MC68681 Set Register Routine */ void _MC68681_NAME(mc68681_set_register)( unsigned32 ulCtrlPort, unsigned8 ucRegNum, unsigned8 ucData ) { _MC68681_TYPE *port; port = CALCULATE_REGISTER_ADDRESS( ulCtrlPort, ucRegNum ); *port = ucData; }