/* i386.h - DELAY */

#define NBPG            4096

#define NID             48
#define NGD              8

#define IRQBASE         32      /* base ivec for IRQ0               */

struct idt {
    unsigned short      igd_loffset;
    unsigned short      igd_segsel;
    unsigned int        igd_rsvd : 5;
    unsigned int        igd_mbz : 3;
    unsigned int        igd_type : 5;
    unsigned int        igd_dpl : 2;
    unsigned int        igd_present : 1;
    unsigned short      igd_hoffset;
};

#define IGDT_TASK        5      /* task gate IDT descriptor             */
#define IGDT_INTR       14      /* interrupt gate IDT descriptor    */
#define IGDT_TRAPG      15      /* Trap Gate                        */


/* Segment Descriptor */

struct sd {
    unsigned short      sd_lolimit;
    unsigned short      sd_lobase;
    unsigned char       sd_midbase;
    unsigned int        sd_perm : 3;
    unsigned int        sd_iscode : 1;
    unsigned int        sd_isapp : 1;
    unsigned int        sd_dpl : 2;
    unsigned int        sd_present : 1;
    unsigned int        sd_hilimit : 4;
    unsigned int        sd_avl : 1;
    unsigned int        sd_mbz : 1;             /* must be '0' */
    unsigned int        sd_32b : 1;
    unsigned int        sd_gran : 1;
    unsigned char       sd_hibase;
};

extern  struct sd       gdt_copy[];

#define sd_type         sd_perm

/* System Descriptor Types */

#define SDT_INTG        14      /* Interrupt Gate       */

/* Segment Table Register */
struct segtr {
    unsigned int        len : 16;
    unsigned int        addr : 32;
};