/** @file\r
PEI Services Table Pointer Library.\r
- \r
+\r
This library is used for PEIM which does executed from flash device directly but\r
executed in memory.\r
\r
- Copyright (c) 2006 - 2008, 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
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+ Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
CONST EFI_PEI_SERVICES **gPeiServices;\r
\r
/**\r
- Caches a pointer PEI Services Table. \r
- \r
- Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer \r
- in a CPU specific manner as specified in the CPU binding section of the Platform Initialization \r
- Pre-EFI Initialization Core Interface Specification. \r
- \r
+ Caches a pointer PEI Services Table.\r
+\r
+ Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer\r
+ in a CPU specific manner as specified in the CPU binding section of the Platform Initialization\r
+ Pre-EFI Initialization Core Interface Specification.\r
+\r
If PeiServicesTablePointer is NULL, then ASSERT().\r
- \r
+\r
@param PeiServicesTablePointer The address of PeiServices pointer.\r
**/\r
VOID\r
/**\r
Retrieves the cached value of the PEI Services Table pointer.\r
\r
- Returns the cached value of the PEI Services Table pointer in a CPU specific manner \r
- as specified in the CPU binding section of the Platform Initialization Pre-EFI \r
+ Returns the cached value of the PEI Services Table pointer in a CPU specific manner\r
+ as specified in the CPU binding section of the Platform Initialization Pre-EFI\r
Initialization Core Interface Specification.\r
- \r
+\r
If the cached PEI Services Table pointer is NULL, then ASSERT().\r
\r
@return The pointer to PeiServices.\r
\r
/**\r
The constructor function caches the pointer to PEI services.\r
- \r
+\r
The constructor function caches the pointer to PEI services.\r
It will always return EFI_SUCCESS.\r
\r
- @param FileHandle Handle of FFS header the loaded driver.\r
- @param PeiServices Pointer to the PEI services.\r
+ @param FileHandle The handle of FFS header the loaded driver.\r
+ @param PeiServices The pointer to the PEI services.\r
\r
- @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r
\r
**/\r
EFI_STATUS\r
return EFI_SUCCESS;\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
+ //\r
+ // PEI Services Table pointer is cached in the global variable. No additional\r
+ // migration actions are required.\r
+ //\r
+ return;\r
+}\r