forked from Imagelibrary/rtems
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/*
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* This file contains a typical set of register access routines which may be
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* used with the mc68681 chip if accesses to the chip are as follows:
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*
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* + registers are accessed as bytes
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* + registers are only byte-aligned (no address gaps)
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*
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* COPYRIGHT (c) 1989-1997.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <rtems.h>
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#include <libchip/serial.h>
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#include <libchip/mc68681.h>
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#ifndef _MC68681_MULTIPLIER
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#define _MC68681_MULTIPLIER 1
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#define _MC68681_NAME(_X) _X
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#define _MC68681_TYPE uint8_t
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#endif
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#define CALCULATE_REGISTER_ADDRESS( _base, _reg ) \
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(_MC68681_TYPE *)((_base) + ((_reg) * _MC68681_MULTIPLIER ))
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/*
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* MC68681 Get Register Routine
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*/
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uint8_t _MC68681_NAME(mc68681_get_register)(
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uintptr_t ulCtrlPort,
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uint8_t ucRegNum
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)
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{
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_MC68681_TYPE *port;
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port = CALCULATE_REGISTER_ADDRESS( ulCtrlPort, ucRegNum );
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return *port;
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}
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/*
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* MC68681 Set Register Routine
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*/
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void _MC68681_NAME(mc68681_set_register)(
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uintptr_t ulCtrlPort,
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uint8_t ucRegNum,
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uint8_t ucData
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)
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{
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_MC68681_TYPE *port;
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port = CALCULATE_REGISTER_ADDRESS( ulCtrlPort, ucRegNum );
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*port = ucData;
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}
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