/** @file\r
- PEI Services Table Pointer Library for IA-32 and X64.\r
+ PEI Services Table Pointer Library for IA-32 and x64.\r
\r
- Copyright (c) 2006 - 2007, Intel Corporation.<BR>\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
+ According to PI specification, the peiservice pointer is stored prior at IDT\r
+ table in IA32 and x64 architecture.\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
-#include "InternalPeiServicesTablePointer.h"\r
+#include <PiPei.h>\r
+\r
+#include <Library/BaseLib.h>\r
+#include <Library/PeiServicesTablePointerLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/BaseMemoryLib.h>\r
\r
/**\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
- \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
+ If the cached PEI Services Table pointer is NULL, then ASSERT().\r
+\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
+ CONST EFI_PEI_SERVICES **PeiServices;\r
IA32_DESCRIPTOR Idtr;\r
- \r
+\r
AsmReadIdtr (&Idtr);\r
- PeiServices = (EFI_PEI_SERVICES **) (*(UINTN*)(Idtr.Base - 4));\r
+ PeiServices = (CONST EFI_PEI_SERVICES **) (*(UINTN*)(Idtr.Base - sizeof (UINTN)));\r
ASSERT (PeiServices != NULL);\r
return PeiServices;\r
}\r
\r
/**\r
- \r
- The function sets 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
- \r
- @param PeiServicesTablePointer The pointer to PeiServices.\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
- EFI_PEI_SERVICES ** PeiServicesTablePointer\r
+ IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer\r
)\r
{\r
- IA32_DESCRIPTOR Idtr;\r
- \r
+ IA32_DESCRIPTOR Idtr;\r
+\r
+ ASSERT (PeiServicesTablePointer != NULL);\r
AsmReadIdtr (&Idtr);\r
- (*(UINTN*)(Idtr.Base - 4)) = (UINTN)PeiServicesTablePointer;\r
+ (*(UINTN*)(Idtr.Base - sizeof (UINTN))) = (UINTN)PeiServicesTablePointer;\r
}\r
\r
/**\r
- After memory initialization in PEI phase, the IDT table in temporary memory should \r
- be migrated to memory, and the address of PeiServicesPointer also need to be updated \r
- immediately preceding the new IDT table.\r
- \r
- @param PeiServices The address of PeiServices pointer.\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
+ If The cached PEI Services Table pointer is NULL, then ASSERT().\r
+ If the permanent memory is allocated failed, then ASSERT().\r
**/\r
VOID\r
EFIAPI\r
-MigrateIdtTable (\r
- IN EFI_PEI_SERVICES **PeiServices\r
+MigratePeiServicesTablePointer (\r
+ VOID\r
)\r
{\r
- UINTN Size;\r
- VOID *NewBase;\r
- EFI_STATUS Status;\r
- IA32_DESCRIPTOR Idtr;\r
- \r
+ EFI_STATUS Status;\r
+ IA32_DESCRIPTOR Idtr;\r
+ EFI_PHYSICAL_ADDRESS IdtBase;\r
+ CONST EFI_PEI_SERVICES **PeiServices;\r
+\r
+ //\r
+ // Get PEI Services Table pointer\r
+ //\r
AsmReadIdtr (&Idtr);\r
- \r
- Size = sizeof(UINTN) + (Idtr.Limit + 1); \r
- \r
- Status = PeiServicesAllocatePool (Size, &NewBase);\r
+ PeiServices = (CONST EFI_PEI_SERVICES **) (*(UINTN*)(Idtr.Base - sizeof (UINTN)));\r
+ ASSERT (PeiServices != NULL);\r
+ //\r
+ // Allocate the permanent memory.\r
+ //\r
+ Status = (*PeiServices)->AllocatePages (\r
+ PeiServices,\r
+ EfiBootServicesCode,\r
+ EFI_SIZE_TO_PAGES(Idtr.Limit + 1 + sizeof (UINTN)),\r
+ &IdtBase\r
+ );\r
ASSERT_EFI_ERROR (Status);\r
- \r
- CopyMem ((VOID*)((UINTN)NewBase + sizeof(UINTN)), (VOID*)Idtr.Base, (Idtr.Limit + 1));\r
- \r
- Idtr.Base = (UINTN)NewBase + sizeof(UINTN);\r
+ //\r
+ // Idt table needs to be migrated into memory.\r
+ //\r
+ CopyMem ((VOID *) (UINTN) IdtBase, (VOID *) (Idtr.Base - sizeof (UINTN)), Idtr.Limit + 1 + sizeof (UINTN));\r
+ Idtr.Base = (UINTN) IdtBase + sizeof (UINTN);\r
AsmWriteIdtr (&Idtr);\r
- SetPeiServicesTablePointer(PeiServices); \r
-} \r
+\r
+ return;\r
+}\r
+\r
\r
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