From 40323b5b3739f36cc96cffcc30111e95cde2d3b2 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Wed, 13 Dec 2000 22:33:49 +0000 Subject: 2000-12-13 Joel Sherrill * configure.in: Added new directories. * shared/interrupts/Makefile.am: Added AM_CPPFLAGS to define TX39 when compiling for a TX3904. * shared/interrupts/maxvectors.c: Corrected conditional logic. * tx39/Makefile.am: Added vectorisrs. * tx39/vectorisrs/Makefile.am, tx39/vectorisrs/vectorisrs.c, * tx39/vectorisrs/.cvsignore: New files. This decodes the interrupt pending information on the TX3904 and vectors an interrupt. --- c/src/lib/libcpu/mips/tx39/vectorisrs/vectorisrs.c | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 c/src/lib/libcpu/mips/tx39/vectorisrs/vectorisrs.c (limited to 'c/src/lib/libcpu/mips/tx39/vectorisrs/vectorisrs.c') diff --git a/c/src/lib/libcpu/mips/tx39/vectorisrs/vectorisrs.c b/c/src/lib/libcpu/mips/tx39/vectorisrs/vectorisrs.c new file mode 100644 index 0000000000..15a4753123 --- /dev/null +++ b/c/src/lib/libcpu/mips/tx39/vectorisrs/vectorisrs.c @@ -0,0 +1,41 @@ +/* + * $Id$ + */ + +#include +#include +#include + +#define mips_get_cause( _cause ) \ + do { \ + asm volatile( "mfc0 %0, $13; nop" : "=g" (_cause) : ); \ + } while (0) + +#define CALL_ISR(_vector) \ + (_ISR_Vector_table[_vector])(_vector); + +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 ); +} -- cgit v1.2.3