kern/gdt.h

//a.michelizza.free.fr
#define GDTBASE    0x0      /* physical addr. where must be gdt */
#define GDTSIZE    0x08

/* segment descriptor */
struct gdtdesc {
    u16 lim0_15;
    u16 base0_15;
    u8 base16_23;
    u8 acces;
    u8 lim16_19:4;
    u8 other:4;
    u8 base24_31;
} __attribute__ ((packed));

/* GDTR */
struct gdtr {
    u16 limite;
    u32 base;
} __attribute__ ((packed));

void init_gdt_desc(u32, u32, u8, u8, struct gdtdesc *);
void init_gdt(void);

#ifdef __GDT__
    struct gdtdesc kgdt[GDTSIZE];   /* GDT */
    struct gdtr kgdtr;      /* GDTR */
#else
    extern struct gdtdesc kgdt[];
    extern struct gdtr kgdtr;
#endif