0ac9b6d4cf
- 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
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
#ifndef __HW_INTR_X86_H__
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#define __HW_INTR_X86_H__
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#include "kernel/kernel.h"
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_PROTOTYPE(int irq_8259_unmask,(int irq));
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_PROTOTYPE(int irq_8259_mask,(int irq));
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_PROTOTYPE(int irq_8259_eoi, (int irq));
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_PROTOTYPE(void irq_handle,(int irq));
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_PROTOTYPE(void i8259_disable,(void));
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/*
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* we don't use IO APIC if not configured for SMP as we cannot read any info
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* about it unless we use MPS which is not present on all single CPU
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* configurations. ACPI would be another option, however we don't support it
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* either
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*/
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#if defined(CONFIG_APIC)
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#include "arch/i386/apic.h"
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#define hw_intr_mask(irq) ioapic_mask_irq(irq)
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#define hw_intr_unmask(irq) ioapic_unmask_irq(irq)
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#define hw_intr_ack(irq) ioapic_eoi(irq)
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#define hw_intr_used(irq) do { \
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if (ioapic_enabled) \
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ioapic_set_irq(irq); \
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} while (0)
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#define hw_intr_not_used(irq) do { \
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if (ioapic_enabled) \
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ioapic_unset_irq(irq); \
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} while (0)
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#define hw_intr_disable_all() do { \
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ioapic_disable_all(); \
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ioapic_reset_pic(); \
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lapic_disable(); \
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} while (0)
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#ifdef CONFIG_SMP
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#define ipi_ack apic_eoi
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#endif
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#else
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/* legacy PIC */
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#define hw_intr_mask(irq) irq_8259_mask(irq)
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#define hw_intr_unmask(irq) irq_8259_unmask(irq)
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#define hw_intr_ack(irq) irq_8259_eoi(irq)
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#define hw_intr_used(irq)
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#define hw_intr_not_used(irq)
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#define hw_intr_disable_all()
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#endif
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#endif /* __HW_INTR_X86_H__ */
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