feat: GICv2 and timer

fix: TimerReset in GIC.c now uses kTimerFrequency

Kernel/Include/Arch/GIC.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <Types.h>
+#include <Arch/IO.h>
+#include <Arch/Exceptions.h>
+
+enum {
+    kGICDBaseAddress = 0x08000000,
+    kGICCBaseAddress = kGICDBaseAddress + 0x10000,
+
+    // GIC Distributor (GICD), offsets from GICD base
+    kGICDCTLR = 0x000,       // control
+    kGICDTYPER = 0x004,      // controller type
+    kGICDISENABLER = 0x100,  // interrupt set-enable
+    kGICDICENABLER = 0x180,  // interrupt clear-enable
+    kGICDICPENDR = 0x280,    // interrupt clear-pending
+    kGICDIPRIORITYR = 0x400, // interrupt priority
+    kGICDITARGETSR = 0x800,  // interrupt processor targets
+
+    // GIC CPU interface (GICC), offsets from CPU interface base
+    kGICCCTLR = 0x000,  // CPU interface control
+    kGICCPMR = 0x004,   // priority mask
+    kGICCIAR = 0x00C,   // interrupt acknowledge
+    kGICCEOIR = 0x010,  // end of interrupt
+};
+
+void GICInitialize(Pointer gicdVirtBase, Pointer giccVirtBase);
+void GICEnableInterrupt(UInt32 irqID);
+void GICDispatch(ExceptionsType type);