[aandrejevic] 65961: [FAST486][NTVDM] Use an external interrupt for the FPU when the NE bit of CR0 is cleared.

Author: aandrejevic
Date: Sat Jan  3 15:16:41 2015
New Revision: 65961

URL: http://svn.reactos.org/svn/reactos?rev=65961&view=rev
Log:
[FAST486][NTVDM]
Use an external interrupt for the FPU when the NE bit of CR0 is cleared.


Modified:
    trunk/reactos/include/reactos/libs/fast486/fast486.h
    trunk/reactos/lib/fast486/fast486.c
    trunk/reactos/lib/fast486/opcodes.c
    trunk/reactos/subsystems/ntvdm/cpu/cpu.c
    trunk/reactos/subsystems/ntvdm/emulator.c
    trunk/reactos/subsystems/ntvdm/emulator.h

Modified: trunk/reactos/include/reactos/libs/fast486/fast486.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/include/reactos/libs/fast4…
==============================================================================
--- trunk/reactos/include/reactos/libs/fast486/fast486.h	[iso-8859-1] (original)
+++ trunk/reactos/include/reactos/libs/fast486/fast486.h	[iso-8859-1] Sat Jan  3 15:16:41
2015
@@ -223,6 +223,13 @@
 typedef
 UCHAR
 (NTAPI *FAST486_INT_ACK_PROC)
+(
+    PFAST486_STATE State
+);
+
+typedef
+VOID
+(NTAPI *FAST486_FPU_PROC)
 (
     PFAST486_STATE State
 );
@@ -473,6 +480,7 @@
     FAST486_IO_WRITE_PROC IoWriteCallback;
     FAST486_BOP_PROC BopCallback;
     FAST486_INT_ACK_PROC IntAckCallback;
+    FAST486_FPU_PROC FpuCallback;
     FAST486_REG GeneralRegs[FAST486_NUM_GEN_REGS];
     FAST486_SEG_REG SegmentRegs[FAST486_NUM_SEG_REGS];
     FAST486_REG InstPtr, SavedInstPtr;
@@ -514,6 +522,7 @@
                   FAST486_IO_WRITE_PROC  IoWriteCallback,
                   FAST486_BOP_PROC       BopCallback,
                   FAST486_INT_ACK_PROC   IntAckCallback,
+                  FAST486_FPU_PROC       FpuCallback,
                   PULONG                 Tlb);
 
 VOID

Modified: trunk/reactos/lib/fast486/fast486.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/fast486/fast486.c?rev=…
==============================================================================
--- trunk/reactos/lib/fast486/fast486.c	[iso-8859-1] (original)
+++ trunk/reactos/lib/fast486/fast486.c	[iso-8859-1] Sat Jan  3 15:16:41 2015
@@ -179,6 +179,12 @@
     return 0x01;
 }
 
+static VOID NTAPI
+Fast486FpuCallback(PFAST486_STATE State)
+{
+    UNREFERENCED_PARAMETER(State);
+}
+
 /* PUBLIC FUNCTIONS ***********************************************************/
 
 VOID
@@ -190,6 +196,7 @@
                   FAST486_IO_WRITE_PROC  IoWriteCallback,
                   FAST486_BOP_PROC       BopCallback,
                   FAST486_INT_ACK_PROC   IntAckCallback,
+                  FAST486_FPU_PROC       FpuCallback,
                   PULONG                 Tlb)
 {
     /* Set the callbacks (or use default ones if some are NULL) */
@@ -199,6 +206,7 @@
     State->IoWriteCallback  = (IoWriteCallback  ? IoWriteCallback  :
Fast486IoWriteCallback );
     State->BopCallback      = (BopCallback      ? BopCallback      :
Fast486BopCallback     );
     State->IntAckCallback   = (IntAckCallback   ? IntAckCallback   :
Fast486IntAckCallback  );
+    State->FpuCallback      = (FpuCallback      ? FpuCallback      :
Fast486FpuCallback     );
 
     /* Set the TLB (if given) */
     State->Tlb = Tlb;
@@ -220,6 +228,7 @@
     FAST486_IO_WRITE_PROC  IoWriteCallback  = State->IoWriteCallback;
     FAST486_BOP_PROC       BopCallback      = State->BopCallback;
     FAST486_INT_ACK_PROC   IntAckCallback   = State->IntAckCallback;
+    FAST486_FPU_PROC       FpuCallback      = State->FpuCallback;
     PULONG                 Tlb              = State->Tlb;
 
     /* Clear the entire structure */
@@ -273,6 +282,7 @@
     State->IoWriteCallback  = IoWriteCallback;
     State->BopCallback      = BopCallback;
     State->IntAckCallback   = IntAckCallback;
+    State->FpuCallback      = FpuCallback;
     State->Tlb              = Tlb;
 }
 

Modified: trunk/reactos/lib/fast486/opcodes.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/fast486/opcodes.c?rev=…
==============================================================================
--- trunk/reactos/lib/fast486/opcodes.c	[iso-8859-1] (original)
+++ trunk/reactos/lib/fast486/opcodes.c	[iso-8859-1] Sat Jan  3 15:16:41 2015
@@ -4125,8 +4125,16 @@
         || (!State->FpuControl.Dm && State->FpuStatus.De)
         || (!State->FpuControl.Im && State->FpuStatus.Ie))
     {
-        /* Call the #MF handler */
-        Fast486Exception(State, FAST486_EXCEPTION_MF);
+        if (State->ControlRegisters[FAST486_REG_CR0] & FAST486_CR0_NE)
+        {
+            /* Call the #MF handler */
+            Fast486Exception(State, FAST486_EXCEPTION_MF);
+        }
+        else
+        {
+            /* Use the external interrupt */
+            State->FpuCallback(State);
+        }
     }
 
 #endif

Modified: trunk/reactos/subsystems/ntvdm/cpu/cpu.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/cpu/cpu.c…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/cpu/cpu.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/cpu/cpu.c	[iso-8859-1] Sat Jan  3 15:16:41 2015
@@ -165,6 +165,7 @@
                       EmulatorWriteIo,
                       EmulatorBiosOperation,
                       EmulatorIntAcknowledge,
+                      EmulatorFpu,
                       NULL /* TODO: Use a TLB */);
 
     /* Initialize the software callback system and register the emulator BOPs */

Modified: trunk/reactos/subsystems/ntvdm/emulator.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/emulator.…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/emulator.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/emulator.c	[iso-8859-1] Sat Jan  3 15:16:41 2015
@@ -210,6 +210,12 @@
 
     /* Get the interrupt number from the PIC */
     return PicGetInterrupt();
+}
+
+VOID WINAPI EmulatorFpu(PFAST486_STATE State)
+{
+    /* The FPU is wired to IRQ 13 */
+    PicInterruptRequest(13);
 }
 
 VOID EmulatorException(BYTE ExceptionNumber, LPWORD Stack)

Modified: trunk/reactos/subsystems/ntvdm/emulator.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/emulator.…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/emulator.h	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/emulator.h	[iso-8859-1] Sat Jan  3 15:16:41 2015
@@ -92,6 +92,11 @@
     PFAST486_STATE State
 );
 
+VOID WINAPI EmulatorFpu
+(
+    PFAST486_STATE State
+);
+
 VOID EmulatorException(BYTE ExceptionNumber, LPWORD Stack);
 
 VOID EmulatorTerminate(VOID);