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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Assertions.h>
#include <Kernel/Debug.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Interrupts/InterruptManagement.h>
#include <Kernel/Interrupts/PIC.h>
#include <Kernel/Interrupts/SharedIRQHandler.h>
#include <Kernel/Sections.h>
namespace Kernel {
UNMAP_AFTER_INIT void SharedIRQHandler::initialize(u8 interrupt_number)
{
auto* handler = new SharedIRQHandler(interrupt_number);
handler->register_interrupt_handler();
handler->disable_interrupt_vector();
}
void SharedIRQHandler::register_handler(GenericInterruptHandler& handler)
{
dbgln_if(INTERRUPT_DEBUG, "Interrupt Handler registered @ Shared Interrupt Handler {}", interrupt_number());
m_handlers.set(&handler);
enable_interrupt_vector();
}
void SharedIRQHandler::unregister_handler(GenericInterruptHandler& handler)
{
dbgln_if(INTERRUPT_DEBUG, "Interrupt Handler unregistered @ Shared Interrupt Handler {}", interrupt_number());
m_handlers.remove(&handler);
if (m_handlers.is_empty())
disable_interrupt_vector();
}
bool SharedIRQHandler::eoi()
{
dbgln_if(INTERRUPT_DEBUG, "EOI IRQ {}", interrupt_number());
m_responsible_irq_controller->eoi(*this);
return true;
}
void SharedIRQHandler::enumerate_handlers(Function<void(GenericInterruptHandler&)>& callback)
{
for (auto* handler : m_handlers) {
VERIFY(handler);
callback(*handler);
}
}
SharedIRQHandler::SharedIRQHandler(u8 irq)
: GenericInterruptHandler(irq)
, m_responsible_irq_controller(InterruptManagement::the().get_responsible_irq_controller(irq))
{
dbgln_if(INTERRUPT_DEBUG, "Shared Interrupt Handler registered @ {}", interrupt_number());
}
SharedIRQHandler::~SharedIRQHandler()
{
dbgln_if(INTERRUPT_DEBUG, "Shared Interrupt Handler unregistered @ {}", interrupt_number());
disable_interrupt_vector();
}
bool SharedIRQHandler::handle_interrupt(const RegisterState& regs)
{
VERIFY_INTERRUPTS_DISABLED();
if constexpr (INTERRUPT_DEBUG) {
dbgln("Interrupt @ {}", interrupt_number());
dbgln("Interrupt Handlers registered - {}", m_handlers.size());
}
int i = 0;
bool was_handled = false;
for (auto* handler : m_handlers) {
dbgln_if(INTERRUPT_DEBUG, "Going for Interrupt Handling @ {}, Shared Interrupt {}", i, interrupt_number());
VERIFY(handler != nullptr);
if (handler->handle_interrupt(regs)) {
handler->increment_invoking_counter();
was_handled = true;
}
dbgln_if(INTERRUPT_DEBUG, "Going for Interrupt Handling @ {}, Shared Interrupt {} - End", i, interrupt_number());
i++;
}
return was_handled;
}
void SharedIRQHandler::enable_interrupt_vector()
{
if (m_enabled)
return;
m_enabled = true;
m_responsible_irq_controller->enable(*this);
}
void SharedIRQHandler::disable_interrupt_vector()
{
if (!m_enabled)
return;
m_enabled = false;
m_responsible_irq_controller->disable(*this);
}
}
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