diff options
| -rw-r--r-- | ArmPkg/Library/ArmMmuLib/AArch64/ArmMmuPeiLibConstructor.c | 61 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf | 36 |
2 files changed, 97 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmMmuLib/AArch64/ArmMmuPeiLibConstructor.c b/ArmPkg/Library/ArmMmuLib/AArch64/ArmMmuPeiLibConstructor.c new file mode 100644 index 0000000000..d370b507a8 --- /dev/null +++ b/ArmPkg/Library/ArmMmuLib/AArch64/ArmMmuPeiLibConstructor.c @@ -0,0 +1,61 @@ +#/* @file
+#
+# Copyright (c) 2016, Linaro Limited. All rights reserved.
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#*/
+
+#include <Base.h>
+
+#include <Library/ArmLib.h>
+#include <Library/ArmMmuLib.h>
+#include <Library/CacheMaintenanceLib.h>
+#include <Library/DebugLib.h>
+
+EFI_STATUS
+EFIAPI
+ArmMmuPeiLibConstructor (
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ extern UINT32 ArmReplaceLiveTranslationEntrySize;
+
+ EFI_FV_FILE_INFO FileInfo;
+ EFI_STATUS Status;
+
+ ASSERT (FileHandle != NULL);
+
+ Status = (*PeiServices)->FfsGetFileInfo (FileHandle, &FileInfo);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Some platforms do not cope very well with cache maintenance being
+ // performed on regions backed by NOR flash. Since the firmware image
+ // can be assumed to be clean to the PoC when running XIP, even when PEI
+ // is executing from DRAM, we only need to perform the cache maintenance
+ // when not executing in place.
+ //
+ if ((UINTN)FileInfo.Buffer <= (UINTN)ArmReplaceLiveTranslationEntry &&
+ ((UINTN)FileInfo.Buffer + FileInfo.BufferSize >=
+ (UINTN)ArmReplaceLiveTranslationEntry + ArmReplaceLiveTranslationEntrySize)) {
+ DEBUG ((EFI_D_INFO, "ArmMmuLib: skipping cache maintenance on XIP PEIM\n"));
+ } else {
+ DEBUG ((EFI_D_INFO, "ArmMmuLib: performing cache maintenance on shadowed PEIM\n"));
+ //
+ // The ArmReplaceLiveTranslationEntry () helper function may be invoked
+ // with the MMU off so we have to ensure that it gets cleaned to the PoC
+ //
+ WriteBackDataCacheRange (ArmReplaceLiveTranslationEntry,
+ ArmReplaceLiveTranslationEntrySize);
+ }
+
+ return RETURN_SUCCESS;
+}
diff --git a/ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf b/ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf new file mode 100644 index 0000000000..14ebf8de67 --- /dev/null +++ b/ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf @@ -0,0 +1,36 @@ +#/** @file
+#
+# Copyright (c) 2016 Linaro Ltd. All rights reserved.
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = ArmMmuPeiLib
+ FILE_GUID = b50d8d53-1ad1-44ea-9e69-8c89d4a6d08b
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ArmMmuLib|PEIM
+ CONSTRUCTOR = ArmMmuPeiLibConstructor
+
+[Sources.AARCH64]
+ AArch64/ArmMmuLibCore.c
+ AArch64/ArmMmuPeiLibConstructor.c
+ AArch64/ArmMmuLibReplaceEntry.S
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ ArmLib
+ CacheMaintenanceLib
+ MemoryAllocationLib
|