Initial commit

code/apic_allow.cpp

@@ -0,0 +1,10 @@
+void Apic::allow(InterruptRequest interruptRequest) {
+    IoApic::IrqOverride *override = IoApic::getOverride(interruptRequest);
+    if (override == nullptr) {
+        // If no override is specified, the IRQ is identity mapped to the GSI
+        IoApic::allow(static_cast<GlobalSystemInterrupt>(interruptRequest));
+    } else {
+        // If an override is specified, lookup which GSI the IRQ is mapped to
+        IoApic::allow(override->target);
+    }
+}