minix/kernel/arch/i386/include/hw_intr.h
Tomas Hruby 0ac9b6d4cf SMP - trully idle APs
- any cpu can use smp_schedule() to tell another cpu to reschedule

- if an AP is idle, it turns off timer as there is nothing to
  preempt, no need to wakeup just to go back to sleep again

- if a cpu makes a process runnable on an idle cpu, it must wake it up
  to reschedule
2010-09-15 14:10:57 +00:00

52 lines
1.4 KiB
C

#ifndef __HW_INTR_X86_H__
#define __HW_INTR_X86_H__
#include "kernel/kernel.h"
_PROTOTYPE(int irq_8259_unmask,(int irq));
_PROTOTYPE(int irq_8259_mask,(int irq));
_PROTOTYPE(int irq_8259_eoi, (int irq));
_PROTOTYPE(void irq_handle,(int irq));
_PROTOTYPE(void i8259_disable,(void));
/*
* we don't use IO APIC if not configured for SMP as we cannot read any info
* about it unless we use MPS which is not present on all single CPU
* configurations. ACPI would be another option, however we don't support it
* either
*/
#if defined(CONFIG_APIC)
#include "arch/i386/apic.h"
#define hw_intr_mask(irq) ioapic_mask_irq(irq)
#define hw_intr_unmask(irq) ioapic_unmask_irq(irq)
#define hw_intr_ack(irq) ioapic_eoi(irq)
#define hw_intr_used(irq) do { \
if (ioapic_enabled) \
ioapic_set_irq(irq); \
} while (0)
#define hw_intr_not_used(irq) do { \
if (ioapic_enabled) \
ioapic_unset_irq(irq); \
} while (0)
#define hw_intr_disable_all() do { \
ioapic_disable_all(); \
ioapic_reset_pic(); \
lapic_disable(); \
} while (0)
#ifdef CONFIG_SMP
#define ipi_ack apic_eoi
#endif
#else
/* legacy PIC */
#define hw_intr_mask(irq) irq_8259_mask(irq)
#define hw_intr_unmask(irq) irq_8259_unmask(irq)
#define hw_intr_ack(irq) irq_8259_eoi(irq)
#define hw_intr_used(irq)
#define hw_intr_not_used(irq)
#define hw_intr_disable_all()
#endif
#endif /* __HW_INTR_X86_H__ */