/*
* High level IRQ handler called from shared_raw_irq_code_entry
*/
int C_dispatch_irq_handler(
BSP_Exception_frame *frame,
unsigned int excNum
)
{
register unsigned int irq;
#if (HAS_PMC_PSC8)
uint16_t check_irq;
uint16_t status_word;
#endif
if (excNum == ASM_DEC_VECTOR) {
bsp_irq_dispatch_list(rtems_hdl_tbl, BSP_DECREMENTER, dflt_entry.hdl);
return 0;
}
irq = read_and_clear_irq();
#if (HAS_PMC_PSC8)
if (irq == SCORE603E_PCI_IRQ_0) {
status_word = read_and_clear_PMC_irq( irq );
for (check_irq=SCORE603E_IRQ16; check_irq<=SCORE603E_IRQ19; check_irq++) {
if ( Is_PMC_IRQ( check_irq, status_word )) {
bsp_irq_dispatch_list_base(rtems_hdl_tbl, check_irq, dflt_entry.hdl);
}
}
} else
#endif
{
bsp_irq_dispatch_list_base(rtems_hdl_tbl, irq, dflt_entry.hdl);
}
return 0;
}
/*
* High level IRQ handler called from shared_raw_irq_code_entry
*/
int C_dispatch_irq_handler (BSP_Exception_frame *frame, unsigned int excNum)
{
register unsigned int irq;
#if BSP_ISA_IRQ_NUMBER > 0
register unsigned isaIntr; /* boolean */
register unsigned oldMask = 0; /* old isa pic masks */
register unsigned newMask; /* new isa pic masks */
#endif
if (excNum == ASM_DEC_VECTOR) {
bsp_irq_dispatch_list(rtems_hdl_tbl, BSP_DECREMENTER, default_rtems_entry.hdl);
return 0;
}
#if BSP_PCI_IRQ_NUMBER > 0
if ( OpenPIC ) {
irq = openpic_irq(0);
if (irq == OPENPIC_VEC_SPURIOUS) {
++BSP_spuriousIntr;
return 0;
}
/* some BSPs might want to use a different numbering... */
irq = irq - OPENPIC_VEC_SOURCE + BSP_PCI_IRQ_LOWEST_OFFSET;
} else {
#if BSP_ISA_IRQ_NUMBER > 0
#ifdef BSP_PCI_ISA_BRIDGE_IRQ
irq = BSP_PCI_ISA_BRIDGE_IRQ;
#else
#error "Configuration Error -- BSP with ISA + PCI IRQs MUST define BSP_PCI_ISA_BRIDGE_IRQ"
#endif
#else
BSP_panic("MUST have an OpenPIC if BSP has PCI IRQs but no ISA IRQs");
/* BSP_panic() never returns but the 'return' statement silences
* a compiler warning about 'irq' possibly being used w/o initialization.
*/
return -1;
#endif
}
#endif
#if BSP_ISA_IRQ_NUMBER > 0
#ifdef BSP_PCI_ISA_BRIDGE_IRQ
#if 0 == BSP_PCI_IRQ_NUMBER
#error "Configuration Error -- BSP w/o PCI IRQs MUST NOT define BSP_PCI_ISA_BRIDGE_IRQ"
#endif
isaIntr = (irq == BSP_PCI_ISA_BRIDGE_IRQ);
#else
isaIntr = 1;
#endif
if (isaIntr) {
/*
* Acknowledge and read 8259 vector
*/
irq = (unsigned int) (*(unsigned char *) RAVEN_INTR_ACK_REG);
/*
* store current PIC mask
*/
oldMask = i8259s_cache;
newMask = oldMask | irq_mask_or_tbl [irq];
i8259s_cache = newMask;
outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
BSP_irq_ack_at_i8259s (irq);
#if BSP_PCI_IRQ_NUMBER > 0
if ( OpenPIC )
openpic_eoi(0);
#endif
}
#endif
/* dispatch handlers */
bsp_irq_dispatch_list(rtems_hdl_tbl, irq, default_rtems_entry.hdl);
#if BSP_ISA_IRQ_NUMBER > 0
if (isaIntr) {
i8259s_cache = oldMask;
outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
}
else
#endif
{
#if BSP_PCI_IRQ_NUMBER > 0
#ifdef BSP_PCI_VME_DRIVER_DOES_EOI
/* leave it to the VME bridge driver to do EOI, so
* it can re-enable the openpic while handling
* VME interrupts (-> VME priorities in software)
*/
if (_BSP_vme_bridge_irq != irq && OpenPIC)
