ArmPlatformPkg/ArmPlatformGlobalVariableLib: Added new function ArmPlatformGetGlobalVariableAddress()

This function returns the address of a Global Variable in the Global Variable Region.

Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13246 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/Include/Library/ArmPlatformGlobalVariableLib.h

@@ -1,6 +1,6 @@
 /** @file
 *
-*  Copyright (c) 2011, ARM Limited. All rights reserved.
+*  Copyright (c) 2011-2012, ARM Limited. All rights reserved.
 *
 *  This program and the accompanying materials
 *  are licensed and made available under the terms and conditions of the BSD License
@@ -29,5 +29,10 @@ ArmPlatformSetGlobalVariable (
   OUT VOID*     Variable
   );
 
+VOID*
+ArmPlatformGetGlobalVariableAddress (
+  IN  UINTN     VariableOffset
+  );
+
 #endif
 

ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/Dxe/DxeArmPlatformGlobalVariableLib.c

@@ -1,6 +1,6 @@
 /** @file
 *
-*  Copyright (c) 2011, ARM Limited. All rights reserved.
+*  Copyright (c) 2011-2012, ARM Limited. All rights reserved.
 *
 *  This program and the accompanying materials
 *  are licensed and made available under the terms and conditions of the BSD License
@@ -67,3 +67,10 @@ ArmPlatformSetGlobalVariable (
   CopyMem ((VOID*)(mGlobalVariableBase + VariableOffset), Variable, VariableSize);
 }
 
+VOID*
+ArmPlatformGetGlobalVariableAddress (
+  IN  UINTN     VariableOffset
+  )
+{
+  return (VOID*)(mGlobalVariableBase + VariableOffset);
+}

ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/Dxe/DxeArmPlatformGlobalVariableLib.inf

@@ -3,6 +3,7 @@
 #  
 #  
 #  Copyright (c) 2011-2012, 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
 #  which accompanies this distribution.  The full text of the license may be found at

ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/Pei/PeiArmPlatformGlobalVariableLib.c

@@ -43,8 +43,6 @@ ArmPlatformGetGlobalVariable (
   } else {
     CopyMem (Variable, (VOID*)(GlobalVariableBase + VariableOffset), VariableSize);
   }
-
-  //DEBUG((EFI_D_ERROR,"++ GET Offset[%d] = 0x%x\n",VariableOffset,*(UINTN*)Variable));
 }
 
 VOID
@@ -68,7 +66,19 @@ ArmPlatformSetGlobalVariable (
   } else {
     CopyMem ((VOID*)(GlobalVariableBase + VariableOffset), Variable, VariableSize);
   }
-
-  //DEBUG((EFI_D_ERROR,"++ SET Offset[%d] = 0x%x\n",VariableOffset,*(UINTN*)Variable));
 }
 
+VOID*
+ArmPlatformGetGlobalVariableAddress (
+  IN  UINTN     VariableOffset
+  )
+{
+  UINTN  GlobalVariableBase;
+
+  // Ensure the Global Variable Size have been initialized
+  ASSERT (VariableOffset < PcdGet32 (PcdPeiGlobalVariableSize));
+
+  GlobalVariableBase = PcdGet32 (PcdCPUCoresStackBase) + PcdGet32 (PcdCPUCorePrimaryStackSize) - PcdGet32 (PcdPeiGlobalVariableSize);
+
+  return (VOID*)(GlobalVariableBase + VariableOffset);
+}

ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.c

@@ -83,3 +83,23 @@ ArmPlatformSetGlobalVariable (
   }
 }
 
+VOID*
+ArmPlatformGetGlobalVariableAddress (
+  IN  UINTN     VariableOffset
+  )
+{
+  UINTN  GlobalVariableBase;
+
+  // Ensure the Global Variable Size have been initialized
+  ASSERT (VariableOffset < PcdGet32 (PcdPeiGlobalVariableSize));
+
+  if (IS_XIP()) {
+    // In Case of XIP, we expect the Primary Stack at the top of the System Memory
+    // The size must be 64bit aligned to allow 64bit variable to be aligned
+    GlobalVariableBase = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize) - ALIGN_VALUE(PcdGet32 (PcdPeiGlobalVariableSize),0x8);
+  } else {
+    GlobalVariableBase = mGlobalVariableBase;
+  }
+
+  return (VOID*)(GlobalVariableBase + VariableOffset);
+}

ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/Sec/SecArmPlatformGlobalVariableLib.c

@@ -65,3 +65,17 @@ ArmPlatformSetGlobalVariable (
   }
 }
 
+VOID*
+ArmPlatformGetGlobalVariableAddress (
+  IN  UINTN     VariableOffset
+  )
+{
+  UINTN  GlobalVariableBase;
+
+  // Ensure the Global Variable Size have been initialized
+  ASSERT (VariableOffset < PcdGet32 (PcdSecGlobalVariableSize));
+
+  GlobalVariableBase = PcdGet32 (PcdCPUCoresSecStackBase) + PcdGet32 (PcdCPUCoreSecPrimaryStackSize) - PcdGet32 (PcdSecGlobalVariableSize);
+
+  return (VOID*)(GlobalVariableBase + VariableOffset);
+}