forked from Bananymous/banan-os
78 lines
1.4 KiB
C++
78 lines
1.4 KiB
C++
#include <BAN/Errors.h>
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#include <kernel/InterruptController.h>
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#include <kernel/APIC.h>
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#include <kernel/PIC.h>
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#include <lai/helpers/sci.h>
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namespace Kernel
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{
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namespace IDT { void register_irq_handler(uint8_t irq, Interruptable*); }
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static InterruptController* s_instance = nullptr;
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void Interruptable::set_irq(int irq)
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{
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if (m_irq != -1)
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IDT::register_irq_handler(m_irq, nullptr);
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m_irq = irq;
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IDT::register_irq_handler(irq, this);
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}
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void Interruptable::enable_interrupt()
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{
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ASSERT(m_irq != -1);
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InterruptController::get().enable_irq(m_irq);
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}
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void Interruptable::disable_interrupt()
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{
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ASSERT_NOT_REACHED();
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}
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InterruptController& InterruptController::get()
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{
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ASSERT(s_instance);
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return *s_instance;
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}
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void InterruptController::initialize(bool force_pic)
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{
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ASSERT(s_instance == nullptr);
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PIC::mask_all();
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PIC::remap();
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if (!force_pic)
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{
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s_instance = APIC::create();
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if (s_instance)
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{
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s_instance->m_using_apic = true;
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return;
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}
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}
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dprintln("Using PIC instead of APIC");
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s_instance = PIC::create();
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ASSERT(s_instance);
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s_instance->m_using_apic = false;
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}
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void InterruptController::enter_acpi_mode()
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{
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if (lai_enable_acpi(m_using_apic ? 1 : 0) != 0)
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dwarnln("could not enter acpi mode");
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}
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bool interrupts_enabled()
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{
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uintptr_t flags;
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asm volatile("pushf; pop %0" : "=r"(flags) :: "memory");
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return flags & (1 << 9);
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}
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}
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