ArmPlatformPkg: Introduce ArmPlatformGlobalVariableLib

This library hides where the 'XIP' Global Variable are located in the memory.
It is expected the Sec/PrePi modules define the Global Variable area through
the GlobalVariable HOB.

The ArmPlatformGlobalVariableLib library allows access to global variables by
their offsets in this region.




git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12420 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 7 insertions, 12 deletions

diff --git a/ArmPlatformPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c b/ArmPlatformPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c
index a18a02a9bb..8ec0808b32 100755
--- a/ArmPlatformPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c
+++ b/ArmPlatformPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c
@@ -13,6 +13,7 @@
 **/

 

 #include <PiPei.h>

+#include <Library/ArmPlatformGlobalVariableLib.h>

 #include <Library/PrePiHobListPointerLib.h>

 #include <Library/DebugLib.h>

 #include <Library/PcdLib.h>

@@ -31,10 +32,11 @@ PrePeiGetHobList (
   VOID

   )

 {

-  return (VOID *)*(UINTN*)(PcdGet32 (PcdCPUCoresNonSecStackBase) +

-                           PcdGet32 (PcdCPUCoresNonSecStackSize) -

-                           PcdGet32 (PcdPeiGlobalVariableSize) +

-                           PcdGet32 (PcdHobListPtrGlobalOffset));

+  VOID* HobList;

+

+  ArmPlatformGetGlobalVariable (PcdGet32 (PcdHobListPtrGlobalOffset), sizeof(VOID*), &HobList);

+

+  return HobList;

 }

 

 

@@ -51,14 +53,7 @@ PrePeiSetHobList (
   IN  VOID      *HobList

   )

 {

-  UINTN* HobListPtr;

-

-  HobListPtr = (UINTN*)(PcdGet32 (PcdCPUCoresNonSecStackBase) +

-                        PcdGet32 (PcdCPUCoresNonSecStackSize) -

-                        PcdGet32 (PcdPeiGlobalVariableSize) +

-                        PcdGet32 (PcdHobListPtrGlobalOffset));

-

-  *HobListPtr = (UINTN)HobList;

+  ArmPlatformSetGlobalVariable (PcdGet32 (PcdHobListPtrGlobalOffset), sizeof(VOID*), &HobList);

 

   return EFI_SUCCESS;

 }