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2007-12-02 Till Straumann <strauman@slac.stanford.edu>

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* shared/irq/i8259.c, shared/irq/irq.h, shared/irq/irq_supp.h,
	shared/irq/openpic_i8259_irq.c: BSP_disable_irq_at_pic(),
	openpic_disable_irq(), BSP_irq_disable_at_i8259s() now return
	0/1 if irq was disabled/enabled prior to disabling.
	irq_supp.h now exports a inline helper routine for scanning
	a list of shared handlers; to be used by PIC drivers.
This commit is contained in:
Till Straumann
2007-12-02 21:49:07 +00:00
parent daccc4ad33
commit c10dc130f9
5 changed files with 60 additions and 33 deletions
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38
c/src/lib/libbsp/powerpc/shared/irq/irq_supp.h
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@@ -30,7 +30,11 @@ extern "C" {
* PIC(s).
*/
extern void BSP_enable_irq_at_pic (const rtems_irq_number irqLine);
extern void BSP_disable_irq_at_pic (const rtems_irq_number irqLine);
/*
* RETURNS: nonzero (> 0 ) if irq was enabled originally, zero if irq
* was off and negative value if there was an error.
*/
extern int BSP_disable_irq_at_pic (const rtems_irq_number irqLine);
/*
* Initialize the PIC.
@@ -48,6 +52,38 @@ struct _BSP_Exception_frame;
*/
void C_dispatch_irq_handler (struct _BSP_Exception_frame *frame, unsigned int excNum);
/*
* Snippet to be used by PIC drivers;
* enables interrupts, traverses list of
* shared handlers for a given interrupt
* and restores original irq level
*/
static inline void
bsp_irq_dispatch_list(rtems_irq_connect_data *tbl, unsigned irq, rtems_irq_hdl sentinel)
{
register uint32_t l_orig;
l_orig = _ISR_Get_level();
/* Enable all interrupts */
_ISR_Set_level(0);
/* rtems_hdl_tbl[irq].hdl(rtems_hdl_tbl[irq].handle); */
{
rtems_irq_connect_data* vchain;
for( vchain = &tbl[irq];
((int)vchain != -1 && vchain->hdl != sentinel);
vchain = (rtems_irq_connect_data*)vchain->next_handler )
{
vchain->hdl(vchain->handle);
}
}
/* Restore original level */
_ISR_Set_level(l_orig);
}
#ifdef __cplusplus
}
#endif