diff options
author | 2023-10-10 14:33:42 +0000 | |
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committer | 2023-10-10 14:33:42 +0000 | |
commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib | |
parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib')
-rw-r--r-- | roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c | 79 | ||||
-rw-r--r-- | roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf | 40 |
2 files changed, 119 insertions, 0 deletions
diff --git a/roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c b/roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c new file mode 100644 index 000000000..67cbc46e5 --- /dev/null +++ b/roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c @@ -0,0 +1,79 @@ +/** @file
+ PEI Services Table Pointer Library.
+
+ This library is used for PEIM which does executed from flash device directly but
+ executed in memory.
+
+ Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2011 Hewlett-Packard Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiPei.h>
+#include <Library/PeiServicesTablePointerLib.h>
+#include <Library/ArmLib.h>
+#include <Library/DebugLib.h>
+
+/**
+ Caches a pointer PEI Services Table.
+
+ Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer
+ in a platform specific manner.
+
+ If PeiServicesTablePointer is NULL, then ASSERT().
+
+ @param PeiServicesTablePointer The address of PeiServices pointer.
+**/
+VOID
+EFIAPI
+SetPeiServicesTablePointer (
+ IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer
+ )
+{
+ ArmWriteTpidrurw((UINTN)PeiServicesTablePointer);
+}
+
+/**
+ Retrieves the cached value of the PEI Services Table pointer.
+
+ Returns the cached value of the PEI Services Table pointer in a CPU specific manner
+ as specified in the CPU binding section of the Platform Initialization Pre-EFI
+ Initialization Core Interface Specification.
+
+ If the cached PEI Services Table pointer is NULL, then ASSERT().
+
+ @return The pointer to PeiServices.
+
+**/
+CONST EFI_PEI_SERVICES **
+EFIAPI
+GetPeiServicesTablePointer (
+ VOID
+ )
+{
+ return (CONST EFI_PEI_SERVICES **)ArmReadTpidrurw();
+}
+
+/**
+Perform CPU specific actions required to migrate the PEI Services Table
+pointer from temporary RAM to permanent RAM.
+
+For IA32 CPUs, the PEI Services Table pointer is stored in the 4 bytes
+immediately preceding the Interrupt Descriptor Table (IDT) in memory.
+For X64 CPUs, the PEI Services Table pointer is stored in the 8 bytes
+immediately preceding the Interrupt Descriptor Table (IDT) in memory.
+For Itanium and ARM CPUs, a the PEI Services Table Pointer is stored in
+a dedicated CPU register. This means that there is no memory storage
+associated with storing the PEI Services Table pointer, so no additional
+migration actions are required for Itanium or ARM CPUs.
+
+**/
+VOID
+EFIAPI
+MigratePeiServicesTablePointer(
+VOID
+)
+{
+ return;
+}
diff --git a/roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf b/roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf new file mode 100644 index 000000000..6e6de9917 --- /dev/null +++ b/roms/edk2/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf @@ -0,0 +1,40 @@ +## @file
+# Instance of PEI Services Table Pointer Library using global variable for the table pointer.
+#
+# PEI Services Table Pointer Library implementation that retrieves a pointer to the
+# PEI Services Table from a global variable. Not available to modules that execute from
+# read-only memory.
+#
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2011 Hewlett-Packard Corporation. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = PeiServicesTablePointerLib
+ FILE_GUID = C3C9C4ED-EB8A-4548-BE1B-ABB0B6F35B1E
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = PeiServicesTablePointerLib|PEIM PEI_CORE SEC
+
+#
+# VALID_ARCHITECTURES = IA32 X64 EBC (EBC is for build only)
+#
+
+[Sources]
+ PeiServicesTablePointer.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ ArmPkg/ArmPkg.dec
+
+[LibraryClasses]
+ ArmLib
+ DebugLib
+
+[Pcd]
+
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