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#ifndef I386_GDT_H
#define I386_GDT_H
#include <stdint.h>
struct gdt_entry {
uint16_t limit_low;
uint16_t base_low;
uint8_t base_middle;
uint8_t access;
uint8_t gran;
uint8_t base_high;
} __attribute__((packed));
struct gdt_ptr {
uint16_t limit;
uint32_t base;
} __attribute__((packed));
struct tss_entry {
uint32_t link;
uint32_t esp0;
uint32_t ss0;
uint32_t esp1;
uint32_t ss2;
uint32_t cr3;
uint32_t eip;
uint32_t eflags;
uint32_t eax;
uint32_t ecx;
uint32_t edx;
uint32_t ebx;
uint32_t esp;
uint32_t ebp;
uint32_t esi;
uint32_t edi;
uint32_t es;
uint32_t cs;
uint32_t ss;
uint32_t ds;
uint32_t fs;
uint32_t gs;
uint32_t ldtr;
uint16_t trap;
uint16_t iomap_base;
} __attribute__((packed));
void gdt_set_gate(int num, uint32_t base, uint32_t limit, uint8_t access, uint8_t gran);
void write_tss(int num, uint32_t ss0, uint32_t esp0);
void set_kernel_esp(uint32_t esp);
void gdt_install(void);
void flush_gdt(void);
#endif
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