rtems_status_code bsp_interrupt_facility_initialize(void)
{
/*
* set up internal tables used by rtems interrupt prologue
*/
compute_i8259_masks_from_prio();
/*
* must enable slave pic anyway
*/
BSP_irq_enable_at_i8259s(2);
return RTEMS_SUCCESSFUL;
}
void TimerOn(const rtems_raw_irq_connect_data* used)
{
Ttimer_val = 0; /* clear timer ISR count */
outport_byte ( TMRCON , 0xb0 ); /* select tmr2, stay in mode 0 */
outport_byte ( TMR1 , 0xfa ); /* set to 250 usec interval */
outport_byte ( TMR1 , 0x00 );
outport_byte ( TMRCON , 0x64 ); /* change to mode 2 ( starts timer ) */
/* interrupts ARE enabled */
/* outport_byte( IERA, 0x41 ); enable interrupt */
/*
* enable interrrupt at i8259 level
*/
BSP_irq_enable_at_i8259s(used->idtIndex - BSP_IRQ_VECTOR_BASE);
}
void
BSP_enable_irq_at_pic(const rtems_irq_number name)
{
#if BSP_ISA_IRQ_NUMBER > 0
if (is_isa_irq(name)) {
/*
* Enable interrupt at PIC level
*/
BSP_irq_enable_at_i8259s ((int) name - BSP_ISA_IRQ_LOWEST_OFFSET);
}
#endif
#if BSP_PCI_IRQ_NUMBER > 0
if (is_pci_irq(name)) {
/*
* Enable interrupt at OPENPIC level
*/
openpic_enable_irq ((int) name - BSP_PCI_IRQ_LOWEST_OFFSET);
}
#endif
}
void BSP_uart_on(const rtems_raw_irq_connect_data* used)
{
BSP_irq_enable_at_i8259s(used->idtIndex - BSP_IRQ_VECTOR_BASE);
}
rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
{
BSP_irq_enable_at_i8259s(vector);
return RTEMS_SUCCESSFUL;
}
/*
* RTEMS Global Interrupt Handler Management Routines
*/
int BSP_setup_the_pic(rtems_irq_global_settings* config)
{
int i;
/*
* Store various code accelerators
*/
default_rtems_entry = config->defaultEntry;
rtems_hdl_tbl = config->irqHdlTbl;
/*
* set up internal tables used by rtems interrupt prologue
*/
#if BSP_ISA_IRQ_NUMBER > 0
/*
* start with ISA IRQ
*/
compute_i8259_masks_from_prio (config);
for (i=BSP_ISA_IRQ_LOWEST_OFFSET; i < BSP_ISA_IRQ_LOWEST_OFFSET + BSP_ISA_IRQ_NUMBER; i++) {
if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
BSP_irq_enable_at_i8259s (i);
}
else {
BSP_irq_disable_at_i8259s (i);
}
}
if ( BSP_ISA_IRQ_NUMBER > 0 ) {
/*
* must enable slave pic anyway
*/
BSP_irq_enable_at_i8259s (2);
}
#endif
#if BSP_PCI_IRQ_NUMBER > 0
if ( ! OpenPIC )
return 1;
/*
* continue with PCI IRQ
*/
for (i=BSP_PCI_IRQ_LOWEST_OFFSET; i < BSP_PCI_IRQ_LOWEST_OFFSET + BSP_PCI_IRQ_NUMBER ; i++) {
/*
* Note that openpic_set_priority() sets the TASK priority of the PIC
*/
openpic_set_source_priority(i - BSP_PCI_IRQ_LOWEST_OFFSET,
config->irqPrioTbl[i]);
if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
openpic_enable_irq ((int) i - BSP_PCI_IRQ_LOWEST_OFFSET);
}
else {
openpic_disable_irq ((int) i - BSP_PCI_IRQ_LOWEST_OFFSET);
}
}
#ifdef BSP_PCI_ISA_BRIDGE_IRQ
/*
* Must enable PCI/ISA bridge IRQ
*/
openpic_enable_irq (BSP_PCI_ISA_BRIDGE_IRQ);
#endif
#endif
return 1;
}