diff options
| author | Gao, Liming <liming.gao@intel.com> | 2014-01-15 02:16:57 +0000 |
|---|---|---|
| committer | lgao4 <lgao4@6f19259b-4bc3-4df7-8a09-765794883524> | 2014-01-15 02:16:57 +0000 |
| commit | ffdb421ca50c3bb4b31f89707da4c99ca8299a77 (patch) | |
| tree | f59cbbd9efb598405fab4a349918ec756724ab82 /MdePkg/Include | |
| parent | 2405af19936960172d3ad0ae895691bd273a3215 (diff) | |
1. Add new API MigratePeiServicesTablePointer() in PeiServicesTablePointerLib class.
2. PeiCore will call this API to migrate the PEI Services Table pointer from temporary RAM to permanent RAM.
Signed-off-by: Gao, Liming <liming.gao@intel.com>
Reviewed-by: Kinney, Michael D <michael.d.kinney@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15114 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Include')
| -rw-r--r-- | MdePkg/Include/Library/PeiServicesTablePointerLib.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/MdePkg/Include/Library/PeiServicesTablePointerLib.h b/MdePkg/Include/Library/PeiServicesTablePointerLib.h index 601e1d57f..b1bed2579 100644 --- a/MdePkg/Include/Library/PeiServicesTablePointerLib.h +++ b/MdePkg/Include/Library/PeiServicesTablePointerLib.h @@ -1,7 +1,7 @@ /** @file
Provides a service to retrieve a pointer to the PEI Services Table.
-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
@@ -50,5 +50,24 @@ SetPeiServicesTablePointer ( IN 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 (
+ );
+
#endif
|