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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/IntrusiveList.h>
#include <AK/Types.h>
#include <Kernel/Arch/RegisterState.h>
namespace Kernel {
enum class HandlerType : u8 {
IRQHandler = 1,
SharedIRQHandler = 2,
UnhandledInterruptHandler = 3,
SpuriousInterruptHandler = 4
};
class GenericInterruptHandler {
public:
static GenericInterruptHandler& from(u8 interrupt_number);
virtual ~GenericInterruptHandler()
{
VERIFY(!m_registered);
}
// Note: this method returns boolean value, to indicate if the handler handled
// the interrupt or not. This is useful for shared handlers mostly.
virtual bool handle_interrupt(RegisterState const& regs) = 0;
void will_be_destroyed();
bool is_registered() const { return m_registered; }
void register_interrupt_handler();
void unregister_interrupt_handler();
u8 interrupt_number() const { return m_interrupt_number; }
ReadonlySpan<u32> per_cpu_call_counts() const;
virtual size_t sharing_devices_count() const = 0;
virtual bool is_shared_handler() const = 0;
virtual HandlerType type() const = 0;
virtual StringView purpose() const = 0;
virtual StringView controller() const = 0;
virtual bool eoi() = 0;
void increment_call_count();
protected:
void change_interrupt_number(u8 number);
GenericInterruptHandler(u8 interrupt_number, bool disable_remap = false);
void disable_remap() { m_disable_remap = true; }
private:
Array<u32, MAX_CPU_COUNT> m_per_cpu_call_counts {};
u8 m_interrupt_number { 0 };
bool m_disable_remap { false };
bool m_registered { false };
IntrusiveListNode<GenericInterruptHandler> m_list_node;
public:
using List = IntrusiveList<&GenericInterruptHandler::m_list_node>;
};
}
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