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https://github.com/torvalds/linux
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7d209c8110
Good riddance... Nuke a pile of redundant handlers that the generic code takes care of as well. Tested-by: Michael Cree <mcree@orcon.net.nz> Signed-off-by: Kyle McMartin <kyle@redhat.com> Signed-off-by: Matt Turner <mattst88@gmail.com>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
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* Handle interrupts from the SRM, assuming no additional weirdness.
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/irq.h>
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#include "proto.h"
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#include "irq_impl.h"
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/*
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* Is the palcode SMP safe? In other words: can we call cserve_ena/dis
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* at the same time in multiple CPUs? To be safe I added a spinlock
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* but it can be removed trivially if the palcode is robust against smp.
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*/
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DEFINE_SPINLOCK(srm_irq_lock);
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static inline void
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srm_enable_irq(unsigned int irq)
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{
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spin_lock(&srm_irq_lock);
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cserve_ena(irq - 16);
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spin_unlock(&srm_irq_lock);
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}
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static void
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srm_disable_irq(unsigned int irq)
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{
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spin_lock(&srm_irq_lock);
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cserve_dis(irq - 16);
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spin_unlock(&srm_irq_lock);
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}
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/* Handle interrupts from the SRM, assuming no additional weirdness. */
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static struct irq_chip srm_irq_type = {
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.name = "SRM",
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.unmask = srm_enable_irq,
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.mask = srm_disable_irq,
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.mask_ack = srm_disable_irq,
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};
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void __init
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init_srm_irqs(long max, unsigned long ignore_mask)
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{
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long i;
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if (NR_IRQS <= 16)
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return;
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for (i = 16; i < max; ++i) {
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if (i < 64 && ((ignore_mask >> i) & 1))
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continue;
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set_irq_chip_and_handler(i, &srm_irq_type, handle_level_irq);
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irq_to_desc(i)->status |= IRQ_LEVEL;
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}
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}
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void
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srm_device_interrupt(unsigned long vector)
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{
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int irq = (vector - 0x800) >> 4;
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handle_irq(irq);
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}
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