[Zion] Add a keyboard interrupt handler and a driver manager.

zion/interrupt/driver_manager.cpp

@@ -0,0 +1,26 @@
+#include "interrupt/driver_manager.h"
+
+#include "debug/debug.h"
+
+DriverManager* gDriverManager = nullptr;
+
+DriverManager& DriverManager::Get() { return *gDriverManager; }
+
+DriverManager::DriverManager() { gDriverManager = this; }
+
+void DriverManager::WriteMessage(uint64_t irq_num, IpcMessage&& message) {
+  if (!driver_map_.Contains(irq_num)) {
+    dbgln("WARN IRQ for {x} with no registered driver", irq_num);
+    return;
+  }
+
+  driver_map_.at(irq_num)->Send(glcr::Move(message));
+}
+
+glcr::ErrorCode DriverManager::RegisterListener(uint64_t irq_num,
+                                                glcr::RefPtr<Port> port) {
+  if (driver_map_.Contains(irq_num)) {
+    return glcr::ALREADY_EXISTS;
+  }
+  return driver_map_.Insert(irq_num, port);
+}