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Kernel/Devices: Introduce the Device Control Device

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This device will assist userspace to manage hotplug events.
A userspace application reads a DeviceEvent entry until the return value
is zero which indicates no events that are queued and waiting for
processing.
Trying to read with a buffer smaller than sizeof(DeviceEvent) results in
EOVERFLOW.
For now, there's no ioctl mechanism for this device but in the future an
acknowledgement mechanism can be implemented via ioctl(2) interface.
This commit is contained in:
Liav A 2021-12-20 11:10:35 +02:00 • committed by Linus Groh
parent b60e19fd34
commit b1ca39411b
7 changed files with 151 additions and 0 deletions
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2
Kernel/init.cpp
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@ -15,6 +15,7 @@
#include <Kernel/CommandLine.h>
#include <Kernel/Devices/Audio/AC97.h>
#include <Kernel/Devices/Audio/SB16.h>
#include <Kernel/Devices/DeviceControlDevice.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Devices/FullDevice.h>
#include <Kernel/Devices/HID/HIDManagement.h>
@ -185,6 +186,7 @@ extern "C" [[noreturn]] UNMAP_AFTER_INIT void init(BootInfo const& boot_info)
SysFSComponentRegistry::initialize();
DeviceManagement::the().attach_null_device(*NullDevice::must_initialize());
DeviceManagement::the().attach_console_device(*ConsoleDevice::must_create());
DeviceManagement::the().attach_device_control_device(*DeviceControlDevice::must_create());
s_bsp_processor.initialize(0);
CommandLine::initialize();