reactos/subsystems/mvdm/ntvdm/cpu/callback.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            callback.h
   5  * PURPOSE:         32-bit Interrupt Handlers
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  *                  Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   8  */
   9
  10 #ifndef _CALLBACK_H_
  11 #define _CALLBACK_H_
  12
  13 /* DEFINES ********************************************************************/
  14
  15 #define BOP(num)            LOBYTE(EMULATOR_BOP), HIBYTE(EMULATOR_BOP), (num)
  16 #define UnSimulate16(trap)           \
  17 do {                                 \
  18     *(PUSHORT)(trap) = EMULATOR_BOP; \
  19     (trap) += sizeof(USHORT);        \
  20     *(trap) = BOP_UNSIMULATE;        \
  21 } while(0)
  22 // #define UnSimulate16        MAKELONG(EMULATOR_BOP, BOP_UNSIMULATE) // BOP(BOP_UNSIMULATE)
  23
  24 #define TRAMPOLINE_SIZE     sizeof(ULONGLONG)
  25
  26 typedef struct _CALLBACK16
  27 {
  28     ULONG  TrampolineFarPtr; // Where the trampoline zone is placed
  29     ULONG  TrampolineSize;   // Size of the trampoline zone
  30     USHORT Segment;
  31     USHORT NextOffset;
  32 } CALLBACK16, *PCALLBACK16;
  33
  34 /* FUNCTIONS ******************************************************************/
  35
  36 VOID
  37 InitializeContextEx(IN PCALLBACK16 Context,
  38                     IN ULONG       TrampolineSize,
  39                     IN USHORT      Segment,
  40                     IN USHORT      Offset);
  41
  42 VOID
  43 InitializeContext(IN PCALLBACK16 Context,
  44                   IN USHORT      Segment,
  45                   IN USHORT      Offset);
  46
  47 VOID
  48 Call16(IN USHORT Segment,
  49        IN USHORT Offset);
  50
  51 VOID
  52 RunCallback16(IN PCALLBACK16 Context,
  53               IN ULONG       FarPtr);
  54
  55 ULONG
  56 RegisterCallback16(IN  ULONG   FarPtr,
  57                    IN  LPBYTE  CallbackCode,
  58                    IN  SIZE_T  CallbackSize,
  59                    OUT PSIZE_T CodeSize OPTIONAL);
  60
  61 #endif // _CALLBACK_H_
  62
  63 /* EOF */