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/*
* Motorola MC9328MXL Interrupt handler
*
* Copyright (c) 2004 by Jay Monkman <jtm@lopingdog.com>
*
* 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.
*
* $Id$
*/
#include <bsp.h>
#include <irq.h>
#include <rtems/score/thread.h>
#include <rtems/score/apiext.h>
#include <mc9328mxl.h>
/*
* This function check that the value given for the irq line
* is valid.
*/
static int isValidInterrupt(int irq)
{
if ( (irq < 0) || (irq >= BSP_MAX_INT))
return 0;
return 1;
}
/*
* Installs the interrupt handler.
*
* You should only have to add the code to unmask the interrupt.
*
*/
int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq)
{
rtems_interrupt_level level;
uint32_t *bsp_tbl;
bsp_tbl = (uint32_t*)&bsp_vector_table;
if (!isValidInterrupt(irq->name)) {
return 0;
}
/*
* Check if default handler is actually connected. If not issue an error.
*/
if (bsp_tbl[irq->name] != default_int_handler) {
return 0;
}
_CPU_ISR_Disable(level);
/*
* store the new handler
*/
bsp_tbl[irq->name] = irq->hdl;
/*
* Enable interrupt on device
*/
if(irq->on)
{
irq->on(irq);
}
_CPU_ISR_Enable(level);
return 1;
}
/*
* Remove and interrupt handler
*
* You should only have to add the code to mask the interrupt.
*
*/
int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq)
{
rtems_interrupt_level level;
uint32_t *bsp_tbl;
bsp_tbl = (uint32_t*)&bsp_vector_table;
if (!isValidInterrupt(irq->name)) {
return 0;
}
/*
* Check if the handler is actually connected. If not issue an error.
*/
if (bsp_tbl[irq->name] != irq->hdl) {
return 0;
}
_CPU_ISR_Disable(level);
/*
* Disable interrupt on device
*/
if(irq->off) {
irq->off(irq);
}
/*
* restore the default irq value
*/
bsp_tbl[irq->name] = default_int_handler;
_CPU_ISR_Enable(level);
return 1;
}
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