X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdePkg%2FLibrary%2FPeiServicesTablePointerLibKr7%2FPeiServicesTablePointer.c;h=5da6e1d7578223b16bf7f1727bcdadd831ff6932;hp=4c91a9618726a04c8c19f620b33be1a5529138d5;hb=ffdb421ca50c3bb4b31f89707da4c99ca8299a77;hpb=2fc59a003ed9104f9feebe0e418f2a04a50f3284

diff --git a/MdePkg/Library/PeiServicesTablePointerLibKr7/PeiServicesTablePointer.c b/MdePkg/Library/PeiServicesTablePointerLibKr7/PeiServicesTablePointer.c
index 4c91a96187..5da6e1d757 100644
--- a/MdePkg/Library/PeiServicesTablePointerLibKr7/PeiServicesTablePointer.c
+++ b/MdePkg/Library/PeiServicesTablePointerLibKr7/PeiServicesTablePointer.c
@@ -2,7 +2,7 @@
   PEI Services Table Pointer Library implementation for IPF that uses Kernel
   Register 7 to store the pointer.
 
-  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2014, Intel Corporation. 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
@@ -66,6 +66,25 @@ SetPeiServicesTablePointer (
   AsmWriteKr7 ((UINT64)(UINTN)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;
+}