ArmPlatformPkg/PeiServicesTablePointerLib: Update PeiServicesTablePointerLib instance to add new API MigratePeiServicesTablePointer()

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gao, Liming <liming.gao@intel.com>
Reviewed-By: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15120 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 20 insertions, 0 deletions

diff --git a/ArmPlatformPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c b/ArmPlatformPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
index cb0041f90d..8be91c000d 100644
--- a/ArmPlatformPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
+++ b/ArmPlatformPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
@@ -67,4 +67,24 @@ GetPeiServicesTablePointer (
   return (CONST EFI_PEI_SERVICES**)PeiServicesTablePointer;

 }

 

+/**

+  Perform CPU specific actions required to migrate the PEI Services Table 

+  pointer from temporary RAM to permanent RAM.

+

+  For IA32 CPUs, the PEI Services Table pointer is stored in the 4 bytes 

+  immediately preceding the Interrupt Descriptor Table (IDT) in memory.

+  For X64 CPUs, the PEI Services Table pointer is stored in the 8 bytes 

+  immediately preceding the Interrupt Descriptor Table (IDT) in memory.

+  For Itanium and ARM CPUs, a the PEI Services Table Pointer is stored in

+  a dedicated CPU register.  This means that there is no memory storage 

+  associated with storing the PEI Services Table pointer, so no additional 

+  migration actions are required for Itanium or ARM CPUs.

 

+**/

+VOID

+EFIAPI

+MigratePeiServicesTablePointer (

+  )

+{

+  return;

+}