From ab4c59912c526d515e6e72188c08a7f92e5573e8 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Thu, 2 Apr 2026 15:07:54 +0200
Subject: x86_64: implement legacy PIT driver

---
 kapi/include/kapi/devices.hpp         | 24 +++--------------------
 kapi/include/kapi/devices/bus.hpp     |  2 ++
 kapi/include/kapi/devices/manager.hpp | 37 +++++++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 21 deletions(-)
 create mode 100644 kapi/include/kapi/devices/manager.hpp

(limited to 'kapi')

diff --git a/kapi/include/kapi/devices.hpp b/kapi/include/kapi/devices.hpp
index 2028a64..5c01b2f 100644
--- a/kapi/include/kapi/devices.hpp
+++ b/kapi/include/kapi/devices.hpp
@@ -1,10 +1,9 @@
 #ifndef TEACHOS_KAPI_DEVICES_HPP
 #define TEACHOS_KAPI_DEVICES_HPP
 
-#include "kapi/devices/bus.hpp"     // IWYU pragma: export
-#include "kapi/devices/device.hpp"  // IWYU pragma: export
-
-#include <cstddef>
+#include "kapi/devices/bus.hpp"      // IWYU pragma: export
+#include "kapi/devices/device.hpp"   // IWYU pragma: export
+#include "kapi/devices/manager.hpp"  // IWYU pragma: export
 
 namespace kapi::devices
 {
@@ -22,23 +21,6 @@ namespace kapi::devices
   //! @return a reference to the root bus.
   auto get_root_bus() -> bus &;
 
-  //! Ask the kernel to allocate a new major number.
-  //!
-  //! @return a new, unused major number.
-  auto allocate_major_number() -> std::size_t;
-
-  //! Register a new device with the kernel's device manager.
-  //!
-  //! @param device The device to register.
-  //! @return true if the device was registered successfully, false otherwise.
-  auto register_device(device & device) -> bool;
-
-  //! Unregister a device from the kernel's device manager.
-  //!
-  //! @param device The device to unregister.
-  //! @return true if the device was unregistered successfully, false otherwise.
-  auto unregister_device(device & device) -> bool;
-
   //! @}
 
   //! @addtogroup platform-defined
diff --git a/kapi/include/kapi/devices/bus.hpp b/kapi/include/kapi/devices/bus.hpp
index ccaf0f2..a5457e1 100644
--- a/kapi/include/kapi/devices/bus.hpp
+++ b/kapi/include/kapi/devices/bus.hpp
@@ -2,6 +2,7 @@
 #define TEACHOS_KAPI_DEVICES_BUS_HPP
 
 #include "kapi/devices/device.hpp"
+#include "kapi/devices/manager.hpp"
 #include "kapi/system.hpp"
 
 #include <kstd/memory>
@@ -58,6 +59,7 @@ namespace kapi::devices
     {
       auto observer = m_observers.emplace_back(child.get());
       m_devices.push_back(std::move(child));
+      kapi::devices::register_device(*observer);
 
       if (m_initialized.test())
       {
diff --git a/kapi/include/kapi/devices/manager.hpp b/kapi/include/kapi/devices/manager.hpp
new file mode 100644
index 0000000..56cd678
--- /dev/null
+++ b/kapi/include/kapi/devices/manager.hpp
@@ -0,0 +1,37 @@
+#ifndef TEACHOS_KAPI_DEVICES_MANAGER_HPP
+#define TEACHOS_KAPI_DEVICES_MANAGER_HPP
+
+// IWYU pragma: private, include "kapi/devices.hpp"
+
+#include "kapi/devices/device.hpp"
+
+#include <cstddef>
+
+namespace kapi::devices
+{
+
+  //! @addtogroup kernel-defined
+  //! @{
+
+  //! Ask the kernel to allocate a new major number.
+  //!
+  //! @return a new, unused major number.
+  auto allocate_major_number() -> std::size_t;
+
+  //! Register a new device with the kernel's device manager.
+  //!
+  //! @param device The device to register.
+  //! @return true if the device was registered successfully, false otherwise.
+  auto register_device(device & device) -> bool;
+
+  //! Unregister a device from the kernel's device manager.
+  //!
+  //! @param device The device to unregister.
+  //! @return true if the device was unregistered successfully, false otherwise.
+  auto unregister_device(device & device) -> bool;
+
+  //! @}
+
+}  // namespace kapi::devices
+
+#endif
\ No newline at end of file
-- 
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