1 /** @file 2 Provides a service to retrieve a pointer to the PEI Services Table. 3 4 Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #ifndef __PEI_SERVICES_TABLE_POINTER_LIB_H__ 16 #define __PEI_SERVICES_TABLE_POINTER_LIB_H__ 17 18 /** 19 Retrieves the cached value of the PEI Services Table pointer. 20 21 Returns the cached value of the PEI Services Table pointer in a CPU specific manner 22 as specified in the CPU binding section of the Platform Initialization Pre-EFI 23 Initialization Core Interface Specification. 24 25 If the cached PEI Services Table pointer is NULL, then ASSERT(). 26 27 @return The pointer to PeiServices. 28 29 **/ 30 CONST EFI_PEI_SERVICES ** 31 EFIAPI 32 GetPeiServicesTablePointer ( 33 VOID 34 ); 35 36 /** 37 Caches a pointer PEI Services Table. 38 39 Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer 40 in a CPU specific manner as specified in the CPU binding section of the Platform Initialization 41 Pre-EFI Initialization Core Interface Specification. 42 43 If PeiServicesTablePointer is NULL, then ASSERT(). 44 45 @param PeiServicesTablePointer The address of PeiServices pointer. 46 **/ 47 VOID 48 EFIAPI 49 SetPeiServicesTablePointer ( 50 IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer 51 ); 52 53 /** 54 Perform CPU specific actions required to migrate the PEI Services Table 55 pointer from temporary RAM to permanent RAM. 56 57 For IA32 CPUs, the PEI Services Table pointer is stored in the 4 bytes 58 immediately preceding the Interrupt Descriptor Table (IDT) in memory. 59 For X64 CPUs, the PEI Services Table pointer is stored in the 8 bytes 60 immediately preceding the Interrupt Descriptor Table (IDT) in memory. 61 For Itanium and ARM CPUs, a the PEI Services Table Pointer is stored in 62 a dedicated CPU register. This means that there is no memory storage 63 associated with storing the PEI Services Table pointer, so no additional 64 migration actions are required for Itanium or ARM CPUs. 65 66 **/ 67 VOID 68 EFIAPI 69 MigratePeiServicesTablePointer ( 70 VOID 71 ); 72 73 #endif 74 75
