1 files changed, 123 insertions, 0 deletions
diff --git a/Kernel/HALKit/AMD64/HalCoreMultiProcessingAMD64.cpp b/Kernel/HALKit/AMD64/HalCoreMultiProcessingAMD64.cpp
new file mode 100644
index 00000000..470a3286
--- /dev/null
+++ b/Kernel/HALKit/AMD64/HalCoreMultiProcessingAMD64.cpp
@@ -0,0 +1,123 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+------------------------------------------- */
+
+#include <Builtins/ACPI/ACPIFactoryInterface.hxx>
+#include <HALKit/AMD64/Processor.hpp>
+#include <NewKit/KernelCheck.hpp>
+
+///////////////////////////////////////////////////////////////////////////////////////
+
+//! NOTE: fGSI stands 'Field Global System Interrupt'
+
+///////////////////////////////////////////////////////////////////////////////////////
+
+namespace NewOS::HAL
+{
+	constexpr Int32 kThreadAPIC	  = 0;
+	constexpr Int32 kThreadLAPIC  = 1;
+	constexpr Int32 kThreadIOAPIC = 2;
+	constexpr Int32 kThreadAPIC64 = 3;
+	constexpr Int32 kThreadBoot	  = 4;
+
+	/*
+    *
+    * this is used to store info about the current running thread
+    * we use this struct to determine if we can use it, or mark it as used or on
+    * sleep.
+    *
+    */
+
+	struct ProcessorInfoAMD64 final
+	{
+		Int32	ThreadType;
+		UIntPtr JumpAddress;
+
+		struct
+		{
+			UInt32 Code;
+			UInt32 Data;
+			UInt32 BSS;
+		} Selector;
+	};
+
+	STATIC voidPtr	   kApicMadt	  = nullptr;
+	STATIC const char* kApicSignature = "APIC";
+
+	/// @brief Multiple APIC Descriptor Table.
+	struct MadtType final : public SDT
+	{
+		struct MadtAddress final
+		{
+			Char RecordType;
+			Char RecordLen; // record length
+			
+			UInt32 Address;
+			UInt32 Flags; // 1 = Dual Legacy PICs installed
+		} MadtRecords[];
+	};
+
+	struct MadtProcessorLocalApic final
+	{
+		Char   AcpiProcessorId;
+		Char   Reserved;
+		UInt32 Flags;
+	};
+
+	struct MadtIOApic final
+	{
+		Char   ApicId;
+		Char   Reserved;
+		UInt32 Address;
+		UInt32 SystemInterruptBase;
+	};
+
+	struct MadtInterruptSource final
+	{
+		Char   BusSource;
+		Char   IrqSource;
+		UInt32 GSI;
+		UInt16 Flags;
+	};
+
+	struct MadtInterruptNmi final
+	{
+		Char   NmiSource;
+		Char   Reserved;
+		UInt16 Flags;
+		UInt32 GSI;
+	};
+
+	struct MadtLocalApicAddressOverride final
+	{
+		UInt16	Resvered;
+		UIntPtr Address;
+	};
+
+	///////////////////////////////////////////////////////////////////////////////////////
+
+	STATIC MadtType* kApicInfoBlock = nullptr;
+
+	///////////////////////////////////////////////////////////////////////////////////////
+
+	void hal_system_get_cores(voidPtr rsdPtr)
+	{
+		auto acpi = ACPIFactoryInterface(rsdPtr);
+		kApicMadt = acpi.Find(kApicSignature).Leak().Leak();
+
+		if (kApicMadt)
+		{
+            kcout << "New OS: APIC is present...\r";
+			kApicInfoBlock = (MadtType*)kApicMadt;
+		}
+        else
+        {
+			kcout << "New OS: APIC is not present! it is a vital component.\r";
+            ke_stop(RUNTIME_CHECK_FAILED);
+        }
+	}
+} // namespace NewOS::HAL
+
+///////////////////////////////////////////////////////////////////////////////////////