[hbelusca] 68362: [NTVDM] - Let the mouse driver use its own 32-to-16 call scratch buffer. - Simplify some code.

Author: hbelusca
Date: Tue Jul  7 00:11:18 2015
New Revision: 68362

URL: http://svn.reactos.org/svn/reactos?rev=68362&view=rev
Log:
[NTVDM]
- Let the mouse driver use its own 32-to-16 call scratch buffer.
- Simplify some code.

Modified:
    trunk/reactos/subsystems/mvdm/ntvdm/cpu/callback.c
    trunk/reactos/subsystems/mvdm/ntvdm/cpu/callback.h
    trunk/reactos/subsystems/mvdm/ntvdm/dos/mouse32.c

Modified: trunk/reactos/subsystems/mvdm/ntvdm/cpu/callback.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/cpu/c...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/cpu/callback.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/cpu/callback.c	[iso-8859-1] Tue Jul  7 00:11:18 2015
@@ -28,8 +28,6 @@
 #include <isvbop.h>

/* PRIVATE VARIABLES **********************************************************/
-
-#define TRAMPOLINE_SIZE sizeof(ULONGLONG)

static BYTE Yield[] =
 {

Modified: trunk/reactos/subsystems/mvdm/ntvdm/cpu/callback.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/cpu/c...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/cpu/callback.h	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/cpu/callback.h	[iso-8859-1] Tue Jul  7 00:11:18 2015
@@ -20,6 +20,8 @@
     *(trap) = BOP_UNSIMULATE;        \
 } while(0)
 // #define UnSimulate16        MAKELONG(EMULATOR_BOP, BOP_UNSIMULATE) // BOP(BOP_UNSIMULATE)
+
+#define TRAMPOLINE_SIZE     sizeof(ULONGLONG)

typedef struct _CALLBACK16
 {

Modified: trunk/reactos/subsystems/mvdm/ntvdm/dos/mouse32.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/dos/m...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/dos/mouse32.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/dos/mouse32.c	[iso-8859-1] Tue Jul  7 00:11:18 2015
@@ -26,7 +26,6 @@

#include "memory.h"
 #include "io.h"
-#include "dos32krnl/dos.h"
 #include "dos32krnl/memory.h"

/* PRIVATE VARIABLES **********************************************************/
@@ -39,6 +38,7 @@
 {
     CHAR Copyright[sizeof(MouseCopyright)];
     WORD Version;
+    BYTE MouseContextScratch[TRAMPOLINE_SIZE];
     BYTE MouseDosInt16Stub[Int16To32StubSize];
     BYTE MouseIrqInt16Stub[Int16To32StubSize];
 } MOUSE_DRIVER, *PMOUSE_DRIVER;
@@ -46,8 +46,9 @@
 #pragma pack(pop)

/* Global data contained in guest memory */
-WORD MouseDataSegment;
-PMOUSE_DRIVER MouseData;
+static WORD MouseDataSegment;
+static PMOUSE_DRIVER MouseData;
+static CALLBACK16 MouseContext;

#define MICKEYS_PER_CELL_HORIZ  8
 #define MICKEYS_PER_CELL_VERT   16
@@ -198,7 +199,7 @@
                CallMask);

/* Call the callback */
-        RunCallback16(&DosContext, DriverState.Handler0.Callback);
+        RunCallback16(&MouseContext, DriverState.Handler0.Callback);

setAX(AX);
         setBX(BX);
@@ -241,7 +242,7 @@
                     CallMask);

/* Call the callback */
-            RunCallback16(&DosContext, DriverState.Handlers[i].Callback);
+            RunCallback16(&MouseContext, DriverState.Handlers[i].Callback);

setAX(AX);
             setBX(BX);
@@ -915,28 +916,26 @@

VOID DosMouseEnable(VOID)
 {
-    if (!DriverEnabled)
-    {
-        DriverEnabled = TRUE;
-
-        /* Get the old IRQ handler */
-        OldIrqHandler = ((PDWORD)BaseAddress)[MOUSE_IRQ_INT];
-
-        /* Set the IRQ handler */
-        RegisterInt32(MAKELONG(FIELD_OFFSET(MOUSE_DRIVER, MouseIrqInt16Stub), MouseDataSegment),
-                      MOUSE_IRQ_INT, DosMouseIrq, NULL);
-    }
+    if (DriverEnabled) return;
+
+    DriverEnabled = TRUE;
+
+    /* Get the old IRQ handler */
+    OldIrqHandler = ((PDWORD)BaseAddress)[MOUSE_IRQ_INT];
+
+    /* Set the IRQ handler */
+    RegisterInt32(MAKELONG(FIELD_OFFSET(MOUSE_DRIVER, MouseIrqInt16Stub), MouseDataSegment),
+                  MOUSE_IRQ_INT, DosMouseIrq, NULL);
 }

VOID DosMouseDisable(VOID)
 {
-    if (DriverEnabled)
-    {
-        /* Restore the old IRQ handler */
-        ((PDWORD)BaseAddress)[MOUSE_IRQ_INT] = OldIrqHandler;
-
-        DriverEnabled = FALSE;
-    }
+    if (!DriverEnabled) return;
+
+    /* Restore the old IRQ handler */
+    ((PDWORD)BaseAddress)[MOUSE_IRQ_INT] = OldIrqHandler;
+
+    DriverEnabled = FALSE;
 }

VOID DosMouseUpdatePosition(PCOORD NewPosition)
@@ -1001,6 +1000,9 @@
     if (MouseDataSegment == 0) return FALSE;
     MouseData = (PMOUSE_DRIVER)SEG_OFF_TO_PTR(MouseDataSegment, 0x0000);

+    /* Initialize the callback context */
+    InitializeContext(&MouseContext, MouseDataSegment, FIELD_OFFSET(MOUSE_DRIVER, MouseContextScratch));
+
     /* Clear the state */
     RtlZeroMemory(&DriverState, sizeof(DriverState));