ArmPlatformPkg/Bds: Signal when the variable 'Fdt' has been updated

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16589 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/Bds/Bds.c

@@ -427,7 +427,6 @@ StartDefaultBootOnTimeout (
                                 which is implementation-dependent.
 
 **/
-STATIC
 VOID
 EFIAPI
 EmptyCallbackFunction (

ArmPlatformPkg/Bds/Bds.inf

@@ -2,7 +2,7 @@
 #
 #  Component description file for Bds module
 #
-#  Copyright (c) 2011-2014, ARM Ltd. All rights reserved.<BR>
+#  Copyright (c) 2011-2015, ARM Ltd. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -53,6 +53,7 @@
   gEfiEndOfDxeEventGroupGuid
   gEfiFileSystemInfoGuid
   gArmGlobalVariableGuid
+  gArmPlatformUpdateFdtEventGuid
 
 [Protocols]
   gEfiBdsArchProtocolGuid

ArmPlatformPkg/Bds/BdsInternal.h

@@ -289,4 +289,19 @@ IsPrintableString (
   OUT BOOLEAN *IsUnicode
   );
 
+/**
+  An empty function to pass error checking of CreateEventEx ().
+
+  @param  Event                 Event whose notification function is being invoked.
+  @param  Context               Pointer to the notification function's context,
+                                which is implementation-dependent.
+
+**/
+VOID
+EFIAPI
+EmptyCallbackFunction (
+  IN EFI_EVENT                Event,
+  IN VOID                     *Context
+  );
+
 #endif /* _BDSINTERNAL_H_ */

ArmPlatformPkg/Bds/BootMenu.c

@@ -15,6 +15,7 @@
 #include "BdsInternal.h"
 
 #include <Guid/ArmGlobalVariableHob.h>
+#include <Guid/ArmPlatformEvents.h>
 
 extern BDS_LOAD_OPTION_SUPPORT *BdsLoadOptionSupportList;
 
@@ -834,6 +835,7 @@ UpdateFdtPath (
   BDS_SUPPORTED_DEVICE      *SupportedBootDevice;
   EFI_DEVICE_PATH_PROTOCOL  *FdtDevicePathNodes;
   EFI_DEVICE_PATH_PROTOCOL  *FdtDevicePath;
+  EFI_EVENT                 UpdateFdtEvent;
 
   Status = SelectBootDevice (&SupportedBootDevice);
   if (EFI_ERROR(Status)) {
@@ -873,6 +875,23 @@ UpdateFdtPath (
     ASSERT_EFI_ERROR(Status);
   }
 
+  if (!EFI_ERROR (Status)) {
+    //
+    // Signal FDT has been updated
+    //
+    Status = gBS->CreateEventEx (
+        EVT_NOTIFY_SIGNAL,
+        TPL_NOTIFY,
+        EmptyCallbackFunction,
+        NULL,
+        &gArmPlatformUpdateFdtEventGuid,
+        &UpdateFdtEvent
+        );
+    if (!EFI_ERROR (Status)) {
+      gBS->SignalEvent (UpdateFdtEvent);
+    }
+  }
+
 EXIT:
   if (Status == EFI_ABORTED) {
     Print(L"\n");