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bsp/virtex: Fix interrupt handling

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Some modules like the XPS UART Lite use event triggered interrupts.  If
we acknowledge the interrupts after the interrupt service we may loose
these events.
This commit is contained in:
Sebastian Huber
2013-07-09 16:04:04 +02:00
parent 4fe3ad2f99
commit 296b60d72a
1 changed files with 5 additions and 9 deletions
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14
c/src/lib/libbsp/powerpc/virtex/irq/irq_init.c
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@@ -81,11 +81,13 @@ static void BSP_irq_disable_at_opbintc (rtems_irq_number irqnum)
*/
static void BSP_irq_handle_at_opbintc(void)
{
uint32_t ipr, mask, i, c;
uint32_t ipr, i, c;
/* Get pending interrupts */
ipr = get_ipr();
c = 0;
mask = 0;
/* Acknowledge all pending interrupts now and service them afterwards */
set_iar(ipr);
for (i = 0;
(i < BSP_OPBINTC_PER_IRQ_NUMBER)
@@ -95,17 +97,11 @@ static void BSP_irq_handle_at_opbintc(void)
if ((ipr & c) != 0) {
/* interrupt is asserted */
mask |= c;
ipr &= ~c;
bsp_interrupt_handler_dispatch(i+BSP_OPBINTC_IRQ_LOWEST_OFFSET);
}
}
if (mask) {
/* ack all the interrupts we serviced */
set_iar(mask);
}
}
/*