KernelLand/Kernel/arch/x86_64/include/desctab.h

   1 /**
   2  */
   3 #ifndef _DESCTAB_H_
   4 #define _DESCTAB_H_
   5
   6 typedef struct {
   7         union
   8         {
   9                 struct
  10                 {
  11                         Uint16  LimitLow;
  12                         Uint16  BaseLow;
  13                         Uint8   BaseMid;
  14                         Uint8   Access;
  15                         struct {
  16                                 unsigned LimitHi:       4;
  17                                 unsigned Flags:         4;
  18                         } __attribute__ ((packed));
  19                         Uint8   BaseHi;
  20                 };
  21                 Uint32  DWord[2];
  22         };
  23 } __attribute__ ((packed)) tGDT;
  24
  25 typedef struct {
  26         Uint16  OffsetLo;
  27         Uint16  CS;
  28         Uint16  Flags;  // 0-2: IST, 3-7: 0, 8-11: Type, 12: 0, 13-14: DPL, 15: Present
  29         Uint16  OffsetMid;
  30         Uint32  OffsetHi;
  31         Uint32  Reserved;
  32 } __attribute__ ((packed)) tIDT;
  33
  34 typedef struct {
  35         Uint32  Rsvd1;
  36
  37         Uint64  RSP0;
  38         Uint64  RSP1;
  39         Uint64  RSP2;
  40
  41         Uint32  Rsvd2[2];
  42
  43         // Interrupt Stack Table Pointers
  44         Uint64  IST1;
  45         Uint64  IST2;
  46         Uint64  IST3;
  47         Uint64  IST4;
  48         Uint64  IST5;
  49         Uint64  IST6;
  50         Uint64  IST7;
  51
  52         Uint32  Rsvd3[2];
  53         Uint16  Rsvd4;
  54         Uint16  IOMapBase;
  55 } __attribute__ ((packed)) tTSS;
  56
  57 #endif