mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-30 08:41:15 +00:00
6d2c298b66
As there is no need for a Prekernel on aarch64, the Prekernel code was moved into Kernel itself. The functionality remains the same. SERENITY_KERNEL_AND_INITRD in run.sh specifies a kernel and an inital ramdisk to be used by the emulator. This is needed because aarch64 does not need a Prekernel and the other ones do.
55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
/*
|
|
* Copyright (c) 2021, Nico Weber <thakis@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Types.h>
|
|
|
|
namespace Prekernel {
|
|
|
|
// Can exchange mailbox messages with the Raspberry Pi's VideoCore chip.
|
|
// https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface
|
|
class Mailbox {
|
|
public:
|
|
// Base class for Mailbox messages. Implemented in subsystems that use Mailbox.
|
|
class Message {
|
|
protected:
|
|
Message(u32 tag, u32 arguments_size);
|
|
|
|
private:
|
|
u32 m_tag;
|
|
u32 m_arguments_size;
|
|
u32 m_command_tag;
|
|
};
|
|
|
|
// Must be at the beginning of every command message queue
|
|
class MessageHeader {
|
|
public:
|
|
MessageHeader();
|
|
|
|
u32 queue_size() { return m_message_queue_size; }
|
|
void set_queue_size(u32 size) { m_message_queue_size = size; }
|
|
bool success() const;
|
|
|
|
private:
|
|
u32 m_message_queue_size;
|
|
u32 m_command_tag;
|
|
};
|
|
|
|
// Must be at the end of every command message queue
|
|
class MessageTail {
|
|
private:
|
|
u32 m_empty_tag = 0;
|
|
};
|
|
|
|
static Mailbox& the();
|
|
|
|
// Sends message queue to VideoCore
|
|
bool send_queue(void* queue, u32 queue_size) const;
|
|
};
|
|
|
|
}
|