[tkreuzer] 37984: Implement KeFreezeExecution and KeThawExecution

Author: tkreuzer
Date: Tue Dec  9 18:56:59 2008
New Revision: 37984

URL: http://svn.reactos.org/svn/reactos?rev=37984&view=rev
Log:
Implement KeFreezeExecution and KeThawExecution

Modified:
    branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/cpu.c

Modified: branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/cpu.c
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/ntoskr...
==============================================================================
--- branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/cpu.c [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/cpu.c [iso-8859-1] Tue Dec  9 18:56:59 2008
@@ -42,6 +42,10 @@
 BOOLEAN KiI386PentiumLockErrataPresent;
 BOOLEAN KiSMTProcessorsPresent;

+/* Freeze data */
+KIRQL KiOldIrql;
+ULONG KiFreezeFlag;
+
 /* CPU Signatures */
 static const CHAR CmpIntelID[]       = "GenuineIntel";
 static const CHAR CmpAmdID[]         = "AuthenticAMD";
@@ -547,6 +551,39 @@

BOOLEAN
 NTAPI
+KeFreezeExecution(IN PKTRAP_FRAME TrapFrame,
+                  IN PKEXCEPTION_FRAME ExceptionFrame)
+{
+    ULONG64 Flags = 0;
+
+    /* Disable interrupts and get previous state */
+    Flags = __readeflags();
+    //Flags = __getcallerseflags();
+    _disable();
+
+    /* Save freeze flag */
+    KiFreezeFlag = 4;
+
+    /* Save the old IRQL */
+    KiOldIrql = KeGetCurrentIrql();
+
+    /* Return whether interrupts were enabled */
+    return (Flags & EFLAGS_INTERRUPT_MASK) ? TRUE: FALSE;
+}
+
+VOID
+NTAPI
+KeThawExecution(IN BOOLEAN Enable)
+{
+    /* Cleanup CPU caches */
+    KeFlushCurrentTb();
+
+    /* Re-enable interrupts */
+    if (Enable) _enable();
+}
+
+BOOLEAN
+NTAPI
 KeInvalidateAllCaches(VOID)
 {
     /* Only supported on Pentium Pro and higher */