diff options
| author | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-10-08 21:00:13 +0000 |
|---|---|---|
| committer | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-10-08 21:00:13 +0000 |
| commit | d4a78455c6b0d9bd931ea459190e1de3beee70df (patch) | |
| tree | cb567ea9f11dd48ef87b3c583dc2aff5e3e8ffb6 /MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c | |
| parent | f2a4d59359499e63bddab4b14d029a92c8b5a418 (diff) | |
| download | edk2-platforms-d4a78455c6b0d9bd931ea459190e1de3beee70df.tar.xz | |
Add a GUIDed HOB to init Debug Print error level earlier in DXE. Add NULL PEIM library to init HOB.
Debug Print Error level can be controled by an EFI variable. Update the DXE version of the library to use a HOB if the variable services are not yet availilbe. This allows the variable to be used early in the DXE phase.
approved-by: andrewfish
reviewed-by: lgao4
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12516 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c')
| -rw-r--r-- | MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c b/MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c new file mode 100644 index 0000000000..4bcf0030a0 --- /dev/null +++ b/MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c @@ -0,0 +1,78 @@ +/** @file
+ NULL Library class that reads Debug Mask variable and if it exists makes a
+ HOB that contains the debug mask.
+
+ Copyright (c) 2011, Apple, Inc. All rights reserved.<BR>
+ 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 <PiPei.h>
+
+#include <Library/HobLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PeiServicesLib.h>
+
+#include <Ppi/ReadOnlyVariable2.h>
+#include <Guid/DebugMask.h>
+
+
+/**
+ The constructor reads variable and sets HOB
+
+ @param FileHandle The handle of FFS header the loaded driver.
+ @param PeiServices The pointer to the PEI services.
+
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiDebugPrintHobLibConstructor (
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_READ_ONLY_VARIABLE2_PPI *Variable;
+ UINTN Size;
+ UINT64 GlobalErrorLevel;
+ UINT32 HobErrorLevel;
+
+ Status = PeiServicesLocatePpi (
+ &gEfiPeiReadOnlyVariable2PpiGuid,
+ 0,
+ NULL,
+ (VOID **)&Variable
+ );
+ if (!EFI_ERROR (Status)) {
+ Size = sizeof (GlobalErrorLevel);
+ Status = Variable->GetVariable (
+ Variable,
+ DEBUG_MASK_VARIABLE_NAME,
+ &gEfiGenericVariableGuid,
+ NULL,
+ &Size,
+ &GlobalErrorLevel
+ );
+ if (!EFI_ERROR (Status)) {
+ //
+ // Build the GUID'ed HOB for DXE
+ //
+ HobErrorLevel = (UINT32)GlobalErrorLevel;
+ BuildGuidDataHob (
+ &gEfiGenericVariableGuid,
+ &HobErrorLevel,
+ sizeof (HobErrorLevel)
+ );
+ }
+ }
+
+ return EFI_SUCCESS;
+}
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