/** @file\r
- PEI Services Table Pointer Library services\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
- 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
+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
\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
+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
\r
**/\r
\r
#define __PEI_SERVICES_TABLE_POINTER_LIB_H__\r
\r
/**\r
- The function returns the pointer to PEI services.\r
+ Retrieves the cached value of the PEI Services Table pointer.\r
\r
- The function returns the pointer to PEI services.\r
- It will ASSERT() if the pointer to PEI services is NULL.\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
+ If the cached PEI Services Table pointer is NULL, then ASSERT().\r
\r
- @retval The pointer to PeiServices.\r
+ @return The pointer to PeiServices.\r
\r
**/\r
CONST EFI_PEI_SERVICES **\r
);\r
\r
/**\r
- The function set the pointer of PEI services immediately preceding the IDT table\r
- according to PI specification.\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
@param PeiServicesTablePointer The address of PeiServices pointer.\r
**/\r
VOID\r
EFIAPI\r
SetPeiServicesTablePointer (\r
- IN EFI_PEI_SERVICES ** PeiServicesTablePointer\r
+ 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