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xtensa: add MX irqchip

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MX is an interrupt distributor used in some SMP-capable xtensa
configurations.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Max Filippov
2013-12-01 12:04:57 +04:00
committed by Chris Zankel
parent bae07f8a9d
commit 26a8e96a8b
8 changed files with 261 additions and 0 deletions
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8
arch/xtensa/kernel/irq.c
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@@ -123,6 +123,14 @@ unsigned xtensa_map_ext_irq(unsigned ext_irq)
return XCHAL_NUM_INTERRUPTS;
}
unsigned xtensa_get_ext_irq_no(unsigned irq)
{
unsigned mask = (XCHAL_INTTYPE_MASK_EXTERN_EDGE |
XCHAL_INTTYPE_MASK_EXTERN_LEVEL) &
((1u << irq) - 1);
return hweight32(mask);
}
void __init init_IRQ(void)
{
#ifdef CONFIG_OF