Register dispatch interrupt handler

xtoskrnl/ke/amd64/krnlinit.cc

@@ -57,6 +57,9 @@ KE::KernelInit::BootstrapApplicationProcessor(IN PPROCESSOR_START_BLOCK StartBlo
     /* Initialize local clock for this CPU */
     HL::Timer::InitializeLocalClock();
 
+    /* Register DISPATCH interrupt handler */
+    HL::Irq::RegisterSystemInterruptHandler(APIC_VECTOR_DPC, KE::Dispatcher::HandleDispatchInterrupt);
+
     /* Enter infinite loop */
     DebugPrint(L"KernelInit::BootstrapApplicationProcessor() finished for CPU #%lu. Entering infinite loop.\n",
                ControlBlock->CpuNumber);
@@ -129,6 +132,9 @@ KE::KernelInit::BootstrapKernel(VOID)
     KE::Processor::InitializeProcessorBlocks();
     HL::Cpu::StartAllProcessors();
 
+    /* Register DISPATCH interrupt handler */
+    HL::Irq::RegisterSystemInterruptHandler(APIC_VECTOR_DPC, KE::Dispatcher::HandleDispatchInterrupt);
+
     /* Enter infinite loop */
     DebugPrint(L"KernelInit::BootstrapKernel() finished. Entering infinite loop.\n");
     KE::Crash::HaltSystem();

xtoskrnl/ke/dispatch.cc

@@ -29,6 +29,25 @@ KE::Dispatcher::ExitDispatcher(IN KRUNLEVEL OldRunLevel)
     RunLevel::LowerRunLevel(OldRunLevel);
 }
 
+/**
+ * Handles the dispatch interrupt by retiring pending DPCs, asking the scheduler for the next runnable thread
+ * and performing the context switch.
+ *
+ * @param TrapFrame
+ *        Supplies a pointer to the hardware trap frame representing the interrupted context.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+KE::Dispatcher::HandleDispatchInterrupt(IN PKTRAP_FRAME TrapFrame)
+{
+    /* End the interrupt */
+    HL::Pic::SendEoi();
+}
+
 /**
  * Updates the runtime quantum of the currently executing thread and handles preemption.
  *

xtoskrnl/ke/i686/krnlinit.cc

@@ -57,6 +57,9 @@ KE::KernelInit::BootstrapApplicationProcessor(IN PPROCESSOR_START_BLOCK StartBlo
     /* Initialize local clock for this CPU */
     HL::Timer::InitializeLocalClock();
 
+    /* Register DISPATCH interrupt handler */
+    HL::Irq::RegisterSystemInterruptHandler(APIC_VECTOR_DPC, KE::Dispatcher::HandleDispatchInterrupt);
+
     /* Enter infinite loop */
     DebugPrint(L"KernelInit::BootstrapApplicationProcessor() finished for CPU #%lu. Entering infinite loop.\n",
                ControlBlock->CpuNumber);
@@ -129,6 +132,9 @@ KE::KernelInit::BootstrapKernel(VOID)
     KE::Processor::InitializeProcessorBlocks();
     HL::Cpu::StartAllProcessors();
 
+    /* Register DISPATCH interrupt handler */
+    HL::Irq::RegisterSystemInterruptHandler(APIC_VECTOR_DPC, KE::Dispatcher::HandleDispatchInterrupt);
+
     /* Enter infinite loop */
     DebugPrint(L"KernelInit::BootstrapKernel() finished. Entering infinite loop.\n");
     KE::Crash::HaltSystem();