1 files changed, 127 insertions, 0 deletions
diff --git a/Private/HALKit/AMD64/HalCoreMultiProcessingAMD64.cpp b/Private/HALKit/AMD64/HalCoreMultiProcessingAMD64.cpp
new file mode 100644
index 00000000..1e53140f
--- /dev/null
+++ b/Private/HALKit/AMD64/HalCoreMultiProcessingAMD64.cpp
@@ -0,0 +1,127 @@
+/*
+ *	========================================================
+ *
+ *	HCore
+ * 	Copyright Mahrouss Logic, all rights reserved.
+ *
+ * 	========================================================
+ */
+
+#include <HALKit/AMD64/ACPI/ACPIManager.hpp>
+#include <HALKit/AMD64/Processor.hpp>
+
+///////////////////////////////////////////////////////////////////////////////////////
+
+//! NOTE: fGSI stands 'Field Global System Interrupt'
+
+namespace HCore::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";
+
+struct Madt final {
+  char fMag[4];
+  Int32 fLength;
+  char fRev;
+
+  struct MadtAddress final {
+    UInt32 fPhysicalAddress;
+    UInt32 fFlags;  // 1 = Dual Legacy PICs installed
+
+    Char fType;
+    Char fRecLen;  // record length
+  };
+};
+
+struct MadtProcessorLocalApic final {
+  Char fProcessorId;
+  Char fApicId;
+  UInt32 fFlags;
+};
+
+struct MadtIOApic final {
+  Char fApicId;
+  Char fReserved;
+  UInt32 fAddress;
+  UInt32 fSystemInterruptBase;
+};
+
+struct MadtInterruptSource final {
+  Char fBusSource;
+  Char fIrqSource;
+  UInt32 fGSI;
+  UInt16 fFlags;
+};
+
+struct MadtInterruptNmi final {
+  Char fNmiSource;
+  Char fReserved;
+  UInt16 fFlags;
+  UInt32 fGSI;
+};
+
+struct MadtLocalApicAddressOverride final {
+  UInt16 fResvered;
+  UIntPtr fAddress;
+};
+
+///////////////////////////////////////////////////////////////////////////////////////
+
+static Madt kApicMadtList[256];
+
+Madt* system_find_core(Madt* madt) {
+  madt = madt + sizeof(Madt);
+
+  if (string_compare(madt->fMag, kApicSignature,
+                     string_length(kApicSignature)) == 0)
+    return madt;
+
+  return nullptr;
+}
+
+///////////////////////////////////////////////////////////////////////////////////////
+
+void system_get_cores(voidPtr rsdPtr) {
+  auto acpi = ACPIManager(rsdPtr);
+  kApicMadt = acpi.Find(kApicSignature).Leak().Leak();
+
+  MUST_PASS(kApicMadt);  // MADT must exist.
+
+  SizeT counter = 0UL;
+  Madt* offset = system_find_core((Madt*)kApicMadt);
+  //! now find core addresses.
+  while (offset != nullptr) {
+    // calls rt_copy_memory in NewC++
+    kApicMadtList[counter] = *offset;
+    offset = system_find_core(offset);
+
+    ++counter;
+  }
+}
+}  // namespace HCore::HAL
+
+///////////////////////////////////////////////////////////////////////////////////////