-/*++\r
-\r
-Copyright (c) 2006 Intel Corporation. All rights reserved\r
-This software and associated documentation (if any) is furnished\r
-under a license and may only be used or copied in accordance\r
-with the terms of the license. Except as permitted by such\r
-license, no part of this software or documentation may be\r
-reproduced, stored in a retrieval system, or transmitted in any\r
-form or by any means without the express written consent of\r
-Intel Corporation.\r
-\r
- PEI Services Table Pointer Library.\r
+/** @file\r
+ PEI Services Table Pointer Library for IA-32 and x64.\r
+\r
+ According to PI specification, the peiservice pointer is stored prior at IDT\r
+ table in IA32 and x64 architecture.\r
\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
+\r
+**/\r
+\r
+#include <PiPei.h>\r
\r
-#include "InternalPeiServicesTablePointer.h"\r
+#include <Library/BaseLib.h>\r
+#include <Library/PeiServicesTablePointerLib.h>\r
+#include <Library/DebugLib.h>\r
\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
+ Initialization Core Interface Specification.\r
\r
- The function returns the pointer to PeiServicee following\r
- PI1.0.\r
- \r
- For IA32, the four-bytes field immediately prior to new IDT\r
- base addres is used to save the EFI_PEI_SERVICES**.\r
- For x64, the eight-bytes field immediately prior to new IDT\r
- base addres is used to save the EFI_PEI_SERVICES**.\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
-EFI_PEI_SERVICES **\r
+CONST EFI_PEI_SERVICES **\r
EFIAPI\r
GetPeiServicesTablePointer (\r
VOID\r
)\r
{\r
- EFI_PEI_SERVICES **PeiServices;\r
-\r
- PeiServices = (EFI_PEI_SERVICES **) AsmPeiSevicesTablePointer ();\r
+ CONST EFI_PEI_SERVICES **PeiServices;\r
+ IA32_DESCRIPTOR Idtr;\r
+ \r
+ AsmReadIdtr (&Idtr);\r
+ PeiServices = (CONST EFI_PEI_SERVICES **) (*(UINTN*)(Idtr.Base - sizeof (UINTN)));\r
ASSERT (PeiServices != NULL);\r
return PeiServices;\r
}\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
+ The function set the pointer of PEI services immediately preceding the IDT table\r
+ according to PI 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 CONST EFI_PEI_SERVICES ** PeiServicesTablePointer\r
+ )\r
+{\r
+ IA32_DESCRIPTOR Idtr;\r
+ \r
+ ASSERT (PeiServicesTablePointer != NULL);\r
+ AsmReadIdtr (&Idtr);\r
+ (*(UINTN*)(Idtr.Base - sizeof (UINTN))) = (UINTN)PeiServicesTablePointer;\r
+}\r
+\r
+\r