Kernel: Add MSIHandler class

This is a stub for now, since we don't support Message Signaled
Interrupts yet.
This commit is contained in:
Liav A 2020-02-22 20:02:38 +02:00 committed by Andreas Kling
parent 9d281b4b15
commit 12dbb7ca49
Notes: sideshowbarker 2024-07-19 09:06:36 +09:00

View file

@ -0,0 +1,59 @@
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Types.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Interrupts/GenericInterruptHandler.h>
#include <Kernel/PCI/Definitions.h>
namespace Kernel {
class MSIHandler : public GenericInterruptHandler {
public:
virtual ~MSIHandler();
virtual void handle_interrupt(RegisterState&) override {}
void enable_irq();
void disable_irq();
virtual bool eoi() override;
virtual size_t get_sharing_devices_count() const override { return 0; }
virtual bool is_shared_handler() const override { return false; }
virtual bool is_sharing_with_others() const override { return m_shared_with_others; }
protected:
void change_irq_number(u8 irq);
explicit MSIHandler(PCI::Address);
private:
bool m_shared_with_others;
bool m_enabled;
};
}