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/*
* $Id$
*/
#include <rtems.h>
#include <stdlib.h>
#include <libcpu/tx3904.h>
#define mips_get_cause( _cause ) \
do { \
asm volatile( "mfc0 %0, $13; nop" : "=r" (_cause) : ); \
} while (0)
#define CALL_ISR(_vector) \
do { \
if ( _ISR_Vector_table[_vector] ) \
(_ISR_Vector_table[_vector])(_vector); \
else \
mips_default_exception(_vector); \
} while (0)
void mips_default_exception( int vector )
{
printk( "Unhandled exception %d\n", vector );
rtems_fatal_error_occurred(1);
}
void mips_vector_isr_handlers( void )
{
unsigned int sr;
unsigned int cause;
mips_get_sr( sr );
mips_get_cause( cause );
cause &= (sr & SR_IMASK);
cause >>= CAUSE_IPSHIFT;
if ( cause & 0x80 ) /* IP[5] ==> INT0 */
CALL_ISR( TX3904_IRQ_INT0 );
if ( cause & 0x40 ) { /* (IP[4] == 1) ==> IP[0-3] are valid */
unsigned int v = (cause >> 2) & 0x0f;
CALL_ISR( v );
}
if ( cause & 0x02 ) /* SW[0] */
CALL_ISR( TX3904_IRQ_SOFTWARE_1 );
if ( cause & 0x01 ) /* IP[1] */
CALL_ISR( TX3904_IRQ_SOFTWARE_2 );
}
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