Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers...

[reactos.git] / subsystems / mvdm / ntvdm / cpu / callback.h

diff --git a/subsystems/mvdm/ntvdm/cpu/callback.h b/subsystems/mvdm/ntvdm/cpu/callback.h
new file mode 100644 (file)
index 0000000..4c7570e
--- /dev/null
+++ b/subsystems/mvdm/ntvdm/cpu/callback.h
@@ -0,0 +1,61 @@
+/*
+ * COPYRIGHT:       GPL - See COPYING in the top level directory
+ * PROJECT:         ReactOS Virtual DOS Machine
+ * FILE:            subsystems/mvdm/ntvdm/cpu/callback.h
+ * PURPOSE:         32-bit Interrupt Handlers
+ * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
+ *                  Hermes Belusca-Maito (hermes.belusca@sfr.fr)
+ */
+
+#ifndef _CALLBACK_H_
+#define _CALLBACK_H_
+
+/* DEFINES ********************************************************************/
+
+#define BOP(num)            LOBYTE(EMULATOR_BOP), HIBYTE(EMULATOR_BOP), (num)
+#define UnSimulate16(trap)           \
+do {                                 \
+    *(PUSHORT)(trap) = EMULATOR_BOP; \
+    (trap) += sizeof(USHORT);        \
+    *(trap) = BOP_UNSIMULATE;        \
+} while(0)
+// #define UnSimulate16        MAKELONG(EMULATOR_BOP, BOP_UNSIMULATE) // BOP(BOP_UNSIMULATE)
+
+#define TRAMPOLINE_SIZE     sizeof(ULONGLONG)
+
+typedef struct _CALLBACK16
+{
+    ULONG  TrampolineFarPtr; // Where the trampoline zone is placed
+    ULONG  TrampolineSize;   // Size of the trampoline zone
+    USHORT Segment;
+    USHORT NextOffset;
+} CALLBACK16, *PCALLBACK16;
+
+/* FUNCTIONS ******************************************************************/
+
+VOID
+InitializeContextEx(IN PCALLBACK16 Context,
+                    IN ULONG       TrampolineSize,
+                    IN USHORT      Segment,
+                    IN USHORT      Offset);
+
+VOID
+InitializeContext(IN PCALLBACK16 Context,
+                  IN USHORT      Segment,
+                  IN USHORT      Offset);
+
+VOID
+Call16(IN USHORT Segment,
+       IN USHORT Offset);
+
+VOID
+RunCallback16(IN PCALLBACK16 Context,
+              IN ULONG       FarPtr);
+
+ULONG
+RegisterCallback16(IN  ULONG   FarPtr,
+                   IN  LPBYTE  CallbackCode,
+                   IN  SIZE_T  CallbackSize,
+                   OUT PSIZE_T CodeSize OPTIONAL);
+
+#endif /* _CALLBACK_H_ */