[aandrejevic] 67698: [FAST486] - Only flush the TLB when needed. - Flush the TLB after a reset.

Author: aandrejevic
Date: Tue May 12 19:10:52 2015
New Revision: 67698

URL: http://svn.reactos.org/svn/reactos?rev=67698&view=rev
Log:
[FAST486]
- Only flush the TLB when needed.
- Flush the TLB after a reset.


Modified:
    trunk/reactos/lib/fast486/common.c
    trunk/reactos/lib/fast486/common.inl
    trunk/reactos/lib/fast486/extraops.c
    trunk/reactos/lib/fast486/fast486.c

Modified: trunk/reactos/lib/fast486/common.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/fast486/common.c?rev=6…
==============================================================================
--- trunk/reactos/lib/fast486/common.c	[iso-8859-1] (original)
+++ trunk/reactos/lib/fast486/common.c	[iso-8859-1] Tue May 12 19:10:52 2015
@@ -834,7 +834,7 @@
     }
 
     /* Flush the TLB */
-    if (State->Tlb) RtlFillMemory(State->Tlb, NUM_TLB_ENTRIES * sizeof(ULONG),
0xFF);
+    Fast486FlushTlb(State);
 
     /* Update the CPL */
     if (NewTssLimit >= (sizeof(FAST486_TSS) - 1)) State->Cpl =
GET_SEGMENT_RPL(NewTss.Cs);

Modified: trunk/reactos/lib/fast486/common.inl
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/fast486/common.inl?rev…
==============================================================================
--- trunk/reactos/lib/fast486/common.inl	[iso-8859-1] (original)
+++ trunk/reactos/lib/fast486/common.inl	[iso-8859-1] Tue May 12 19:10:52 2015
@@ -138,10 +138,21 @@
     {
         /* Set the TLB entry */
         State->Tlb[VirtualAddress >> 12] = TableEntry.Value;
+        State->TlbEmpty = FALSE;
     }
 
     /* Return the table entry */
     return TableEntry.Value;
+}
+
+FORCEINLINE
+VOID
+FASTCALL
+Fast486FlushTlb(PFAST486_STATE State)
+{
+    if (!State->Tlb || State->TlbEmpty) return;
+    RtlFillMemory(State->Tlb, NUM_TLB_ENTRIES * sizeof(ULONG), 0xFF);
+    State->TlbEmpty = TRUE;
 }
 
 FORCEINLINE

Modified: trunk/reactos/lib/fast486/extraops.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/fast486/extraops.c?rev…
==============================================================================
--- trunk/reactos/lib/fast486/extraops.c	[iso-8859-1] (original)
+++ trunk/reactos/lib/fast486/extraops.c	[iso-8859-1] Tue May 12 19:10:52 2015
@@ -640,10 +640,10 @@
     State->PrefetchValid = FALSE;
 #endif
 
-    if (State->Tlb && (ModRegRm.Register == (INT)FAST486_REG_CR3))
+    if (ModRegRm.Register == (INT)FAST486_REG_CR3)
     {
         /* Flush the TLB */
-        RtlFillMemory(State->Tlb, NUM_TLB_ENTRIES * sizeof(ULONG), 0xFF);
+        Fast486FlushTlb(State);
     }
 
     /* Load a value to the control register */

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] Tue May 12 19:10:52 2015
@@ -284,6 +284,9 @@
     State->IntAckCallback   = IntAckCallback;
     State->FpuCallback      = FpuCallback;
     State->Tlb              = Tlb;
+
+    /* Flush the TLB */
+    Fast486FlushTlb(State);
 }
 
 VOID