[ros-arm-bringup] 44877: NMI Support Patch 12: [NTOS]: Implement KeRegisterNMICallback. [NTOS]: Call and implement KiHandleNMI to call all registered NMI callbacks and potentially resume from the NMI if handled.

Author: ros-arm-bringup
Date: Sat Jan  2 05:48:22 2010
New Revision: 44877

URL: http://svn.reactos.org/svn/reactos?rev=44877&view=rev
Log:
NMI Support Patch 12:
    [NTOS]: Implement KeRegisterNMICallback.
    [NTOS]: Call and implement KiHandleNMI to call all registered NMI callbacks and potentially resume from the NMI if handled.

Modified:
    trunk/reactos/ntoskrnl/include/internal/ke.h
    trunk/reactos/ntoskrnl/include/internal/ke_x.h
    trunk/reactos/ntoskrnl/ke/bug.c
    trunk/reactos/ntoskrnl/ke/i386/trap.s

Modified: trunk/reactos/ntoskrnl/include/internal/ke.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/k...
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/ke.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/ke.h [iso-8859-1] Sat Jan  2 05:48:22 2010
@@ -63,6 +63,14 @@
     PKDEFERRED_ROUTINE Routine;
     PVOID Context;
 } DPC_QUEUE_ENTRY, *PDPC_QUEUE_ENTRY;
+
+typedef struct _KNMI_HANDLER_CALLBACK
+{
+    struct _KNMI_HANDLER_CALLBACK* Next;
+    PNMI_CALLBACK Callback;
+    PVOID Context;
+    PVOID Handle;
+} KNMI_HANDLER_CALLBACK, *PKNMI_HANDLER_CALLBACK;

typedef PCHAR
 (NTAPI *PKE_BUGCHECK_UNICODE_TO_ANSI)(

Modified: trunk/reactos/ntoskrnl/include/internal/ke_x.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/k...
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/ke_x.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/ke_x.h [iso-8859-1] Sat Jan  2 05:48:22 2010
@@ -1758,3 +1758,18 @@
     GuardedMutex->SpecialApcDisable = Thread->SpecialApcDisable;
     return TRUE;
 }
+
+
+FORCEINLINE
+VOID
+KiAcquireNmiListLock(OUT PKIRQL OldIrql)
+{
+    KeAcquireSpinLock(&KiNmiCallbackListLock, OldIrql);
+}
+
+FORCEINLINE
+VOID
+KiReleaseNmiListLock(IN KIRQL OldIrql)
+{
+    KeReleaseSpinLock(&KiNmiCallbackListLock, OldIrql);
+}

Modified: trunk/reactos/ntoskrnl/ke/bug.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/bug.c?rev=44877...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/bug.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/bug.c [iso-8859-1] Sat Jan  2 05:48:22 2010
@@ -28,6 +28,8 @@
 ULONG KiHardwareTrigger;
 PUNICODE_STRING KiBugCheckDriver;
 ULONG_PTR KiBugCheckData[5];
+PKNMI_HANDLER_CALLBACK KiNmiCallbackListHead;
+KSPIN_LOCK KiNmiCallbackListLock;

/* Bugzilla Reporting */
 UNICODE_STRING KeRosProcessorName, KeRosBiosDate, KeRosBiosVersion;
@@ -1208,6 +1210,32 @@
     while (TRUE);
 }

+BOOLEAN
+NTAPI
+KiHandleNmi(VOID)
+{
+    BOOLEAN Handled = FALSE;
+    PKNMI_HANDLER_CALLBACK NmiData;
+
+    //
+    // Parse the list of callbacks
+    //
+    NmiData = KiNmiCallbackListHead;
+    while (NmiData)
+    {
+        //
+        // Save if this callback has handled it -- all it takes is one
+        //
+        Handled |= NmiData->Callback(NmiData->Context, Handled);
+        NmiData = NmiData->Next;
+    }
+
+    //
+    // Has anyone handled this?
+    //
+    return Handled;
+}
+
 /* PUBLIC FUNCTIONS **********************************************************/

/*
@@ -1278,17 +1306,6 @@
     /* Lower IRQL and return */
     KeLowerIrql(OldIrql);
     return Status;
-}
-
-/*
- * @unimplemented
- */
-NTSTATUS
-NTAPI
-KeDeregisterNmiCallback(PVOID Handle)
-{
-    UNIMPLEMENTED;
-    return STATUS_UNSUCCESSFUL;
 }

/*
@@ -1362,15 +1379,58 @@
 }

/*
- * @unimplemented
+ * @implemented
  */
 PVOID
 NTAPI
 KeRegisterNmiCallback(IN PNMI_CALLBACK CallbackRoutine,
                       IN PVOID Context)
 {
+    KIRQL OldIrql;
+    PKNMI_HANDLER_CALLBACK NmiData, Next;
+    ASSERT_IRQL_LESS_OR_EQUAL(DISPATCH_LEVEL);
+
+    //
+    // Allocate NMI callback data
+    //
+    NmiData = ExAllocatePoolWithTag(NonPagedPool,
+                                    sizeof(KNMI_HANDLER_CALLBACK),
+                                    'IMNK');
+    if (!NmiData) return NULL;
+
+    //
+    // Fill in the information
+    //
+    NmiData->Callback = CallbackRoutine;
+    NmiData->Context = Context;
+    NmiData->Handle = NmiData;
+
+    //
+    // Insert it into NMI callback list
+    //
+    KiAcquireNmiListLock(&OldIrql);
+    NmiData->Next = KiNmiCallbackListHead;
+    Next = InterlockedCompareExchangePointer(&KiNmiCallbackListHead,
+                                             NmiData,
+                                             NmiData->Next);
+    ASSERT(Next == NmiData->Next);
+    KiReleaseNmiListLock(OldIrql);
+
+    //
+    // Return the opaque "handle"
+    //
+    return NmiData->Handle;
+}
+
+/*
+ * @implemented
+ */
+NTSTATUS
+NTAPI
+KeDeregisterNmiCallback(PVOID Handle)
+{      
     UNIMPLEMENTED;
-    return NULL;
+    return STATUS_UNSUCCESSFUL;
 }

/*

Modified: trunk/reactos/ntoskrnl/ke/i386/trap.s
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/i386/trap.s?rev...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/i386/trap.s [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/i386/trap.s [iso-8859-1] Sat Jan  2 05:48:22 2010
@@ -881,8 +881,11 @@
    stdCall _KiSaveProcessorState, ebp, 0			// Save to KPRCB CONTEXT

//
-	// BUGBUG: Call Registered NMI handlers
+	// Call Registered NMI handlers
    //
+	stdCall _KiHandleNmi							// Call NMI handlers
+	or al, al										// Check if any handled it
+	jne 1f											// Resume from NMI

//
    // Call the platform driver for NMI handling (panic, etc)
@@ -897,6 +900,7 @@
    // In certain situations, nested NMIs can corrupt the TSS, making us lose
    // the original context. If this happens, we have no choice but to panic.
    //
+1:
     mov eax, PCR[KPCR_TSS]							// Get current TSS
     cmp word ptr [eax], KGDT_NMI_TSS				// Check who its points to
     je 2f											// Back to the NMI TSS crash