/** @file EFI Debug Library that installs Debug Level Protocol. Copyright (c) 2006, Intel Corporation
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. **/ STATIC BOOLEAN mDebugLevelInstalled = FALSE; STATIC EFI_DEBUG_LEVEL_PROTOCOL mDebugLevel = { 0 }; /** Installs Debug Level Protocol. The constructor function installs Debug Level Protocol on the ImageHandle. It will ASSERT() if the installation fails and will always return EFI_SUCCESS. @param ImageHandle The firmware allocated handle for the EFI image. @param SystemTable A pointer to the EFI System Table. @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS. **/ EFI_STATUS EFIAPI DebugLibConstructor ( IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable ) { EFI_STATUS Status; // // Initialize Debug Level Protocol. // mDebugLevel.DebugLevel = PcdGet32(PcdDebugPrintErrorLevel); // // Install Debug Level Protocol. // Status = gBS->InstallMultipleProtocolInterfaces ( &ImageHandle, &gEfiDebugLevelProtocolGuid, &mDebugLevel, NULL ); ASSERT_EFI_ERROR (Status); // // Set flag to show that the Debug Level Protocol has been installed. // mDebugLevelInstalled = TRUE; return Status; } /** Prints a debug message to the debug output device if the specified error level is enabled. If any bit in ErrorLevel is also set in PcdDebugPrintErrorLevel, then print the message specified by Format and the associated variable argument list to the debug output device. If Format is NULL, then ASSERT(). @param ErrorLevel The error level of the debug message. @param Format Format string for the debug message to print. **/ VOID EFIAPI DebugPrint ( IN UINTN ErrorLevel, IN CONST CHAR8 *Format, ... ) { UINT64 Buffer[EFI_STATUS_CODE_DATA_MAX_SIZE / sizeof (UINT64)]; EFI_DEBUG_INFO *DebugInfo; UINTN TotalSize; UINTN Index; VA_LIST Marker; UINT64 *ArgumentPointer; // // If Format is NULL, then ASSERT(). // ASSERT (Format != NULL); // // Check driver Debug Level value and global debug level // if (mDebugLevelInstalled) { if ((ErrorLevel & mDebugLevel.DebugLevel) == 0) { return; } } else { if ((ErrorLevel & PcdGet32(PcdDebugPrintErrorLevel)) == 0) { return; } } TotalSize = sizeof (EFI_DEBUG_INFO) + 12 * sizeof (UINT64) + AsciiStrLen (Format) + 1; if (TotalSize > EFI_STATUS_CODE_DATA_MAX_SIZE) { return; } // // Then EFI_DEBUG_INFO // DebugInfo = (EFI_DEBUG_INFO *)Buffer; DebugInfo->ErrorLevel = (UINT32)ErrorLevel; // // 256 byte mini Var Arg stack. That is followed by the format string. // VA_START (Marker, Format); for (Index = 0, ArgumentPointer = (UINT64 *)(DebugInfo + 1); Index < 12; Index++, ArgumentPointer++) { *ArgumentPointer = VA_ARG (Marker, UINT64); } VA_END (Marker); AsciiStrCpy ((CHAR8 *)ArgumentPointer, Format); REPORT_STATUS_CODE_EX ( EFI_DEBUG_CODE, (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_DC_UNSPECIFIED), 0, NULL, &gEfiStatusCodeDataTypeDebugGuid, DebugInfo, TotalSize ); } /** Prints an assert message containing a filename, line number, and description. This may be followed by a breakpoint or a dead loop. Print a message of the form "ASSERT (): \n" to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then CpuDeadLoop() is called. If neither of these bits are set, then this function returns immediately after the message is printed to the debug output device. DebugAssert() must actively prevent recusrsion. If DebugAssert() is called while processing another DebugAssert(), then DebugAssert() must return immediately. If FileName is NULL, then a string of "(NULL) Filename" is printed. If Description is NULL, then a string of "(NULL) Description" is printed. @param FileName Pointer to the name of the source file that generated the assert condition. @param LineNumber The line number in the source file that generated the assert condition @param Description Pointer to the description of the assert condition. **/ VOID EFIAPI DebugAssert ( IN CONST CHAR8 *FileName, IN UINTN LineNumber, IN CONST CHAR8 *Description ) { UINT64 Buffer[EFI_STATUS_CODE_DATA_MAX_SIZE / sizeof(UINT64)]; EFI_DEBUG_ASSERT_DATA *AssertData; UINTN TotalSize; CHAR8 *Temp; // // Make sure it will all fit in the passed in buffer. // TotalSize = sizeof (EFI_DEBUG_ASSERT_DATA) + AsciiStrLen (FileName) + 1 + AsciiStrLen (Description) + 1; if (TotalSize <= EFI_STATUS_CODE_DATA_MAX_SIZE) { // // Fill in EFI_DEBUG_ASSERT_DATA // AssertData = (EFI_DEBUG_ASSERT_DATA *)Buffer; AssertData->LineNumber = (UINT32)LineNumber; // // Copy Ascii FileName including NULL. // Temp = AsciiStrCpy ((CHAR8 *)(AssertData + 1), FileName); // // Copy Ascii Description. // AsciiStrCpy (Temp + AsciiStrLen (FileName) + 1, Description); REPORT_STATUS_CODE_WITH_EXTENDED_DATA ( (EFI_ERROR_CODE | EFI_ERROR_UNRECOVERED), (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_EC_ILLEGAL_SOFTWARE_STATE), AssertData, TotalSize ); } // // Generate a Breakpoint, DeadLoop, or NOP based on PCD settings // if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED) != 0) { CpuBreakpoint (); } else if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED) != 0) { CpuDeadLoop (); } } /** Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer. This function fills Length bytes of Buffer with the value specified by PcdDebugClearMemoryValue, and returns Buffer. If Buffer is NULL, then ASSERT(). If Length is greater than (MAX_ADDRESS – Buffer + 1), then ASSERT(). @param Buffer Pointer to the target buffer to fill with PcdDebugClearMemoryValue. @param Length Number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue. @return Buffer **/ VOID * EFIAPI DebugClearMemory ( OUT VOID *Buffer, IN UINTN Length ) { // // If Buffer is NULL, then ASSERT(). // ASSERT (Buffer != NULL); // // SetMem() checks for the the ASSERT() condition on Length and returns Buffer // return SetMem (Buffer, Length, PcdGet8(PcdDebugClearMemoryValue)); } /** Returns TRUE if ASSERT() macros are enabled. This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set. Otherwise FALSE is returned. @retval TRUE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set. @retval FALSE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear. **/ BOOLEAN EFIAPI DebugAssertEnabled ( VOID ) { return ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED) != 0); } /** Returns TRUE if DEBUG()macros are enabled. This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set. Otherwise FALSE is returned. @retval TRUE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set. @retval FALSE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear. **/ BOOLEAN EFIAPI DebugPrintEnabled ( VOID ) { return ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_PRINT_ENABLED) != 0); } /** Returns TRUE if DEBUG_CODE()macros are enabled. This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set. Otherwise FALSE is returned. @retval TRUE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set. @retval FALSE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear. **/ BOOLEAN EFIAPI DebugCodeEnabled ( VOID ) { return ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_CODE_ENABLED) != 0); } /** Returns TRUE if DEBUG_CLEAR_MEMORY()macro is enabled. This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set. Otherwise FALSE is returned. @retval TRUE The DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set. @retval FALSE The DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear. **/ BOOLEAN EFIAPI DebugClearMemoryEnabled ( VOID ) { return ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED) != 0); }