PiegOS/kernel/GDT/gdt.hpp

#ifndef __GDT__
#define __GDT__

#include "../Helpers/types.hpp"

//Define GDT pointer
struct gdtPointerStruct{
	u16 size;
	u32 segment;
} __attribute__ ((packed));

//Define GDT descriptor
struct gdtDescriptorStruct{
	u16 limit1;
	u16 base1;
	u8 base2;
	u8 access;
	u8 limit2 : 4;
	u8 flags : 4;
	u8 base3;
} __attribute__ ((packed));

//Typedef :
typedef struct gdtPointerStruct gdtPointerStruct;
typedef struct gdtDescriptorStruct gdtDescriptorStruct;


//Gdt class
class Gdt{

	private:

		//Data members
		gdtDescriptorStruct m_Descriptors[4];
		gdtPointerStruct m_Pointer;

		//Methods
		void initGdtDesc(u32 base, u32 limit, u8 access, u8 flags, gdtDescriptorStruct *Descriptor);


	public:

		//Constructor
		Gdt();

		//Destructor
		~Gdt();

		//Methods
		void loadGdt();

};


#endif