2 files changed, 148 insertions, 0 deletions
diff --git a/dev/Mod/ACPI/ACPI.h b/dev/Mod/ACPI/ACPI.h
new file mode 100644
index 00000000..3a895430
--- /dev/null
+++ b/dev/Mod/ACPI/ACPI.h
@@ -0,0 +1,88 @@
+/* -------------------------------------------
+
+	Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#ifndef __ACPI__
+#define __ACPI__
+
+/**
+	https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html
+*/
+
+#include <NewKit/Defines.h>
+
+namespace Kernel
+{
+	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 ACPI_ADDRESS_SPACE_KIND : UInt8
+	{
+		eSystemMemory = 0,
+		eSystemIO	  = 1,
+		ePci		  = 2,
+		eController	  = 3,
+		eSmBus		  = 4,
+		eCount		  = 5,
+		eInvalid	  = 0xFF,
+	};
+
+	class PACKED ACPI_ADDRESS final
+	{
+	public:
+		UInt8	AddressSpaceId;
+		UInt8	RegisterBitWidth;
+		UInt8	RegisterBitOffset;
+		UInt8	Reserved;
+		UIntPtr Address;
+	};
+
+	class PACKED RSDT final
+	{
+	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 Kernel
+
+#endif // !__ACPI__
diff --git a/dev/Mod/ACPI/ACPIFactoryInterface.h b/dev/Mod/ACPI/ACPIFactoryInterface.h
new file mode 100644
index 00000000..2153a409
--- /dev/null
+++ b/dev/Mod/ACPI/ACPIFactoryInterface.h
@@ -0,0 +1,60 @@
+/* -------------------------------------------
+
+	Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#ifndef __MOD_ACPI_H__
+#define __MOD_ACPI_H__
+
+#include <KernelKit/DebugOutput.h>
+#include <Mod/ACPI/ACPI.h>
+#include <NewKit/ErrorOr.h>
+#include <NewKit/Defines.h>
+#include <NewKit/Ref.h>
+
+namespace Kernel
+{
+	class ACPIFactoryInterface;
+
+	typedef ACPIFactoryInterface PowerFactoryInterface;
+
+	class ACPIFactoryInterface final
+	{
+	public:
+		explicit ACPIFactoryInterface(voidPtr rsp_ptr);
+		~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{nullptr}; // pointer to root descriptor.
+		SSizeT	fEntries{0UL};	// number of entries, -1 tells that no invalid entries were
+								// found.
+	};
+} // namespace Kernel
+
+#endif // !__MOD_ACPI_H__