4 files changed, 147 insertions, 0 deletions
diff --git a/Kernel/Modules/ACPI/.gitkeep b/Kernel/Modules/ACPI/.gitkeep
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/Kernel/Modules/ACPI/.gitkeep
diff --git a/Kernel/Modules/ACPI/ACPI.hxx b/Kernel/Modules/ACPI/ACPI.hxx
new file mode 100644
index 00000000..019bcb11
--- /dev/null
+++ b/Kernel/Modules/ACPI/ACPI.hxx
@@ -0,0 +1,88 @@
+/* -------------------------------------------
+
+	Copyright Zeta Electronics Corporation
+
+------------------------------------------- */
+
+#ifndef __ACPI__
+#define __ACPI__
+
+/**
+	https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html
+*/
+
+#include <NewKit/Defines.hpp>
+
+namespace NewOS
+{
+	class PACKED SDT
+	{
+	public:
+		Char   Signature[4];
+		UInt32 Length;
+		UInt8  Revision;
+		Char   Checksum;
+		Char   OemId[6];
+		Char   OemTableId[8];
+		UInt32 OemRev;
+		UInt32 CreatorID;
+		UInt32 CreatorRevision;
+	};
+
+	class PACKED RSDP : public SDT
+	{
+	public:
+		UInt32	RsdtAddress;
+		UIntPtr XsdtAddress;
+		UInt8	ExtendedChecksum;
+		UInt8	Reserved0[3];
+	};
+
+	class PACKED ConfigHeader
+	{
+	public:
+		UInt64 BaseAddress;
+		UInt16 PciSegGroup;
+		UInt8  StartBus;
+		UInt8  EndBus;
+		UInt32 Reserved;
+	};
+
+	enum class AddressSpace : UInt8
+	{
+		SystemMemory = 0,
+		SystemIO	 = 1,
+		Pci			 = 2,
+		Controller	 = 3,
+		SmBus		 = 4,
+		Count		 = 5,
+		Invalid		 = 0xFF,
+	};
+
+	class PACKED Address
+	{
+	public:
+		AddressSpace AddressSpaceId;
+		UInt8		 RegisterBitWidth;
+		UInt8		 RegisterBitOffset;
+		UInt8		 Reserved;
+		UIntPtr		 Address;
+	};
+
+	class PACKED RSDT
+	{
+	public:
+		Char   Signature[4];
+		UInt32 Length;
+		UInt8  Revision;
+		Char   Checksum;
+		Char   OemId[6];
+		Char   OemTableId[8];
+		UInt32 OemRev;
+		UInt32 CreatorID;
+		UInt32 CreatorRevision;
+		UInt32 AddressArr[];
+	};
+} // namespace NewOS
+
+#endif // !__ACPI__
diff --git a/Kernel/Modules/ACPI/ACPIFactoryInterface.hxx b/Kernel/Modules/ACPI/ACPIFactoryInterface.hxx
new file mode 100644
index 00000000..7fbe6192
--- /dev/null
+++ b/Kernel/Modules/ACPI/ACPIFactoryInterface.hxx
@@ -0,0 +1,55 @@
+/* -------------------------------------------
+
+	Copyright Zeta Electronics Corporation
+
+------------------------------------------- */
+
+#ifndef __ACPI_MANAGER__
+#define __ACPI_MANAGER__
+
+#include <Modules/ACPI/ACPI.hxx>
+#include <KernelKit/DebugOutput.hpp>
+#include <NewKit/Defines.hpp>
+#include <NewKit/Ref.hpp>
+
+namespace NewOS
+{
+	class ACPIFactoryInterface final
+	{
+	public:
+		explicit ACPIFactoryInterface(voidPtr rsdPtr);
+		~ACPIFactoryInterface() = default;
+
+		ACPIFactoryInterface& operator=(const ACPIFactoryInterface&) = default;
+		ACPIFactoryInterface(const ACPIFactoryInterface&)			 = default;
+
+	public:
+		void Shutdown(); // shutdown
+		void Reboot();	 // soft-reboot
+
+	public:
+		/// @brief Descriptor find factory.
+		/// @param signature The signature of the descriptor table (MADT, ACPI...)
+		/// @return the blob inside an ErrorOr object.
+		ErrorOr<voidPtr> Find(const char* signature);
+
+		/// @brief Checksum factory.
+		/// @param checksum the data to checksum
+		/// @param len it's size
+		/// @return if it succeed
+		bool Checksum(const char* checksum, SSizeT len); // watch for collides!
+
+	public:
+		ErrorOr<voidPtr> operator[](const char* signature)
+		{
+			return this->Find(signature);
+		}
+
+	private:
+		VoidPtr fRsdp;	  // pointer to root descriptor.
+		SSizeT	fEntries; // number of entries, -1 tells that no invalid entries were
+						  // found.
+	};
+} // namespace NewOS
+
+#endif // !__ACPI_MANAGER__
diff --git a/Kernel/Modules/ACPI/compile_flags.txt b/Kernel/Modules/ACPI/compile_flags.txt
new file mode 100644
index 00000000..1bc51142
--- /dev/null
+++ b/Kernel/Modules/ACPI/compile_flags.txt
@@ -0,0 +1,4 @@
+-I./
+-I../
+-I../../
+-std=c++20