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sh: intc: userimask support.

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This adds support for hardware-assisted userspace irq masking for
special priority levels. Due to the SR.IMASK interactivity, only some
platforms implement this in hardware (including but not limited to
SH-4A interrupt controllers, and ARM-based SH-Mobile CPUs). Each CPU
needs to wire this up on its own, for now only SH7786 is wired up as an
example.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-04-13 14:43:03 +09:00
parent 12129fea50
commit 43b8774dc4
5 changed files with 94 additions and 2 deletions
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9
include/linux/sh_intc.h
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@ -99,6 +99,15 @@ struct intc_desc symbol __initdata = { \
int __init register_intc_controller(struct intc_desc *desc);
int intc_set_priority(unsigned int irq, unsigned int prio);
#ifdef CONFIG_INTC_USERIMASK
int register_intc_userimask(unsigned long addr);
#else
static inline int register_intc_userimask(unsigned long addr)
{
return 0;
}
#endif
int reserve_irq_vector(unsigned int irq);
void reserve_irq_legacy(void);