MdePkg/ProcessorBind: add defines for page allocation granularity

[mirror_edk2.git] / MdePkg / Include / Library / PeiServicesTablePointerLib.h

diff --git a/MdePkg/Include/Library/PeiServicesTablePointerLib.h b/MdePkg/Include/Library/PeiServicesTablePointerLib.h
index 2906d86c48eb95e4b538662a36d90b7c64edab30..7ea6cc10c54043589971cd2447298cf7480202a6 100644 (file)
--- a/MdePkg/Include/Library/PeiServicesTablePointerLib.h
+++ b/MdePkg/Include/Library/PeiServicesTablePointerLib.h
@@ -1,8 +1,8 @@
 /** @file\r
   Provides a service to retrieve a pointer to the PEI Services Table.\r
 \r
-Copyright (c) 2006 - 2008, Intel Corporation\r
-All rights reserved. This program and the accompanying materials\r
+Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
 http://opensource.org/licenses/bsd-license.php\r
@@ -50,5 +50,25 @@ SetPeiServicesTablePointer (
   IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer\r
   );\r
 \r
+/**\r
+  Perform CPU specific actions required to migrate the PEI Services Table \r
+  pointer from temporary RAM to permanent RAM.\r
+\r
+  For IA32 CPUs, the PEI Services Table pointer is stored in the 4 bytes \r
+  immediately preceding the Interrupt Descriptor Table (IDT) in memory.\r
+  For X64 CPUs, the PEI Services Table pointer is stored in the 8 bytes \r
+  immediately preceding the Interrupt Descriptor Table (IDT) in memory.\r
+  For Itanium and ARM CPUs, a the PEI Services Table Pointer is stored in\r
+  a dedicated CPU register.  This means that there is no memory storage \r
+  associated with storing the PEI Services Table pointer, so no additional \r
+  migration actions are required for Itanium or ARM CPUs.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+MigratePeiServicesTablePointer (\r
+  VOID\r
+  );\r
+\r
 #endif\r
 \r