mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 08:02:44 +00:00
c802b1a363
When we enumerate the interrupt handlers, it's a good idea to show a meaningful name to the user instead of "IRQ Handler".
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*
|
|
* Copyright (c) 2021, the SerenityOS developers.
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <Kernel/Devices/CharacterDevice.h>
|
|
#include <Kernel/VM/RingBuffer.h>
|
|
#include <Kernel/VirtIO/VirtIO.h>
|
|
|
|
namespace Kernel {
|
|
|
|
#define VIRTIO_CONSOLE_F_SIZE (1 << 0)
|
|
#define VIRTIO_CONSOLE_F_MULTIPORT (1 << 1)
|
|
#define VIRTIO_CONSOLE_F_EMERG_WRITE (1 << 2)
|
|
|
|
#define RECEIVEQ 0
|
|
#define TRANSMITQ 1
|
|
|
|
class VirtIOConsole final : public CharacterDevice
|
|
, public VirtIODevice {
|
|
public:
|
|
VirtIOConsole(PCI::Address);
|
|
virtual ~VirtIOConsole() override;
|
|
|
|
virtual const char* purpose() const override { return class_name(); }
|
|
|
|
private:
|
|
constexpr static size_t RINGBUFFER_SIZE = 2 * PAGE_SIZE;
|
|
virtual const char* class_name() const override { return m_class_name.characters(); }
|
|
|
|
virtual bool can_read(const FileDescription&, size_t) const override;
|
|
virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override;
|
|
virtual bool can_write(const FileDescription&, size_t) const override;
|
|
virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
|
|
|
|
virtual mode_t required_mode() const override { return 0666; }
|
|
|
|
virtual bool handle_device_config_change() override;
|
|
virtual String device_name() const override { return String::formatted("hvc{}", minor()); }
|
|
virtual void handle_queue_update(u16 queue_index) override;
|
|
|
|
OwnPtr<RingBuffer> m_receive_buffer;
|
|
OwnPtr<RingBuffer> m_transmit_buffer;
|
|
|
|
static unsigned next_device_id;
|
|
};
|
|
|
|
}
|