-#/* @file\r
-#\r
-# Copyright (c) 2016, Linaro Limited. All rights reserved.\r
-#\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 <Base.h>\r
-\r
-#include <Library/ArmLib.h>\r
-#include <Library/CacheMaintenanceLib.h>\r
-#include <Library/DebugLib.h>\r
-\r
-//\r
-// This is a hack. We define a weak symbol with external linkage, which may or\r
-// may not be overridden by a non-weak alternative that is defined with a non\r
-// zero value in the object that contains the MMU routines. Since static\r
-// libraries are pulled in on a per-object basis, and since the MMU object will\r
-// only be pulled in if any of its other symbols are referenced by the client\r
-// module, we can use the value below to figure out whether the MMU routines are\r
-// in use by this module, and decide whether cache maintenance of the function\r
-// ArmReplaceLiveTranslationEntry () is required.\r
-//\r
-INT32 __attribute__((weak)) HaveMmuRoutines;\r
-\r
-EFI_STATUS\r
-EFIAPI\r
-AArch64LibConstructor (\r
- IN EFI_PEI_FILE_HANDLE FileHandle,\r
- IN CONST EFI_PEI_SERVICES **PeiServices\r
- )\r
-{\r
- extern UINT32 ArmReplaceLiveTranslationEntrySize;\r
-\r
- EFI_FV_FILE_INFO FileInfo;\r
- EFI_STATUS Status;\r
-\r
- if (HaveMmuRoutines == 0) {\r
- return RETURN_SUCCESS;\r
- }\r
-\r
- ASSERT (FileHandle != NULL);\r
-\r
- Status = (*PeiServices)->FfsGetFileInfo (FileHandle, &FileInfo);\r
- ASSERT_EFI_ERROR (Status);\r
-\r
- //\r
- // Some platforms do not cope very well with cache maintenance being\r
- // performed on regions backed by NOR flash. Since the cache maintenance\r
- // is unnecessary to begin with in that case, perform it only when not\r
- // executing in place.\r
- //\r
- if ((UINTN)FileInfo.Buffer <= (UINTN)ArmReplaceLiveTranslationEntry &&\r
- ((UINTN)FileInfo.Buffer + FileInfo.BufferSize >=\r
- (UINTN)ArmReplaceLiveTranslationEntry + ArmReplaceLiveTranslationEntrySize)) {\r
- DEBUG ((EFI_D_INFO, "ArmLib: skipping cache maintence on XIP PEIM\n"));\r
- } else {\r
- DEBUG ((EFI_D_INFO, "ArmLib: performing cache maintence on shadowed PEIM\n"));\r
- //\r
- // The ArmReplaceLiveTranslationEntry () helper function may be invoked\r
- // with the MMU off so we have to ensure that it gets cleaned to the PoC\r
- //\r
- WriteBackDataCacheRange (ArmReplaceLiveTranslationEntry,\r
- ArmReplaceLiveTranslationEntrySize);\r
- }\r
-\r
- return RETURN_SUCCESS;\r
-}\r
projects / mirror_edk2.git / commitdiff