--- /dev/null
+/*++\r
+\r
+Copyright (c) 2006, Intel Corporation\r
+All rights reserved. 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
+Module Name:\r
+\r
+ DxePerformanceLib.c\r
+\r
+Abstract:\r
+\r
+ Performance Library\r
+\r
+--*/\r
+\r
+//\r
+// The package level header files this module uses\r
+//\r
+#include <PiDxe.h>\r
+//\r
+// The protocols, PPI and GUID defintions for this module\r
+//\r
+#include <Protocol/Performance.h>\r
+//\r
+// The Library classes this module consumes\r
+//\r
+#include <Library/PerformanceLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/UefiBootServicesTableLib.h>\r
+#include <Library/PcdLib.h>\r
+\r
+STATIC PERFORMANCE_PROTOCOL *mPerformance = NULL;\r
+\r
+/**\r
+ The constructor function caches the pointer to Performance protocol.\r
+\r
+ The constructor function locates Performance protocol from protocol database.\r
+ It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.\r
+\r
+ @retval EFI_SUCCESS Performance protocol is successfully located.\r
+ @retval Other Performance protocol is not located to log performance.\r
+\r
+**/\r
+STATIC\r
+EFI_STATUS\r
+GetPerformanceProtocol (\r
+ VOID\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ PERFORMANCE_PROTOCOL *Performance;\r
+\r
+ if (mPerformance != NULL) {\r
+ return EFI_SUCCESS;\r
+ }\r
+\r
+ Status = gBS->LocateProtocol (&gPerformanceProtocolGuid, NULL, (VOID **) &Performance);\r
+ if (!EFI_ERROR (Status)) {\r
+ ASSERT (Performance != NULL);\r
+ //\r
+ // Cache performance protocol.\r
+ //\r
+ mPerformance = Performance;\r
+ }\r
+\r
+ return Status;\r
+}\r
+\r
+/**\r
+ Creates a record for the beginning of a performance measurement.\r
+\r
+ Creates a record that contains the Handle, Token, and Module.\r
+ If TimeStamp is not zero, then TimeStamp is added to the record as the start time.\r
+ If TimeStamp is zero, then this function reads the current time stamp\r
+ and adds that time stamp value to the record as the start time.\r
+\r
+ @param Handle Pointer to environment specific context used\r
+ to identify the component being measured.\r
+ @param Token Pointer to a Null-terminated ASCII string\r
+ that identifies the component being measured.\r
+ @param Module Pointer to a Null-terminated ASCII string\r
+ that identifies the module being measured.\r
+ @param TimeStamp 64-bit time stamp.\r
+\r
+ @retval RETURN_SUCCESS The start of the measurement was recorded.\r
+ @retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.\r
+\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+StartPerformanceMeasurement (\r
+ IN CONST VOID *Handle, OPTIONAL\r
+ IN CONST CHAR8 *Token, OPTIONAL\r
+ IN CONST CHAR8 *Module, OPTIONAL\r
+ IN UINT64 TimeStamp\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ Status = GetPerformanceProtocol ();\r
+ if (EFI_ERROR (Status)) {\r
+ return RETURN_OUT_OF_RESOURCES;\r
+ }\r
+\r
+ Status = mPerformance->StartGauge (Handle, Token, Module, TimeStamp);\r
+\r
+ return (RETURN_STATUS) Status;\r
+}\r
+\r
+/**\r
+ Fills in the end time of a performance measurement.\r
+\r
+ Looks up the record that matches Handle, Token, and Module.\r
+ If the record can not be found then return RETURN_NOT_FOUND.\r
+ If the record is found and TimeStamp is not zero,\r
+ then TimeStamp is added to the record as the end time.\r
+ If the record is found and TimeStamp is zero, then this function reads\r
+ the current time stamp and adds that time stamp value to the record as the end time.\r
+ If this function is called multiple times for the same record, then the end time is overwritten.\r
+\r
+ @param Handle Pointer to environment specific context used\r
+ to identify the component being measured.\r
+ @param Token Pointer to a Null-terminated ASCII string\r
+ that identifies the component being measured.\r
+ @param Module Pointer to a Null-terminated ASCII string\r
+ that identifies the module being measured.\r
+ @param TimeStamp 64-bit time stamp.\r
+\r
+ @retval RETURN_SUCCESS The end of the measurement was recorded.\r
+ @retval RETURN_NOT_FOUND The specified measurement record could not be found.\r
+\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+EndPerformanceMeasurement (\r
+ IN CONST VOID *Handle, OPTIONAL\r
+ IN CONST CHAR8 *Token, OPTIONAL\r
+ IN CONST CHAR8 *Module, OPTIONAL\r
+ IN UINT64 TimeStamp\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ Status = GetPerformanceProtocol ();\r
+ if (EFI_ERROR (Status)) {\r
+ return RETURN_NOT_FOUND;\r
+ }\r
+\r
+ Status = mPerformance->EndGauge (Handle, Token, Module, TimeStamp);\r
+\r
+ return (RETURN_STATUS) Status;\r
+}\r
+\r
+/**\r
+ Attempts to retrieve a performance measurement log entry from the performance measurement log.\r
+\r
+ Attempts to retrieve the performance log entry specified by LogEntryKey. If LogEntryKey is\r
+ zero on entry, then an attempt is made to retrieve the first entry from the performance log,\r
+ and the key for the second entry in the log is returned. If the performance log is empty,\r
+ then no entry is retrieved and zero is returned. If LogEntryKey is not zero, then the performance\r
+ log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is\r
+ returned. If LogEntryKey is the key for the last entry in the log, then the last log entry is\r
+ retrieved and an implementation specific non-zero key value that specifies the end of the performance\r
+ log is returned. If LogEntryKey is equal this implementation specific non-zero key value, then no entry\r
+ is retrieved and zero is returned. In the cases where a performance log entry can be returned,\r
+ the log entry is returned in Handle, Token, Module, StartTimeStamp, and EndTimeStamp.\r
+ If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT().\r
+ If Handle is NULL, then ASSERT().\r
+ If Token is NULL, then ASSERT().\r
+ If Module is NULL, then ASSERT().\r
+ If StartTimeStamp is NULL, then ASSERT().\r
+ If EndTimeStamp is NULL, then ASSERT().\r
+\r
+ @param LogEntryKey On entry, the key of the performance measurement log entry to retrieve.\r
+ 0, then the first performance measurement log entry is retrieved.\r
+ On exit, the key of the next performance lof entry entry.\r
+ @param Handle Pointer to environment specific context used to identify the component\r
+ being measured.\r
+ @param Token Pointer to a Null-terminated ASCII string that identifies the component\r
+ being measured.\r
+ @param Module Pointer to a Null-terminated ASCII string that identifies the module\r
+ being measured.\r
+ @param StartTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement\r
+ was started.\r
+ @param EndTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement\r
+ was ended.\r
+\r
+ @return The key for the next performance log entry (in general case).\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+GetPerformanceMeasurement (\r
+ IN UINTN LogEntryKey,\r
+ OUT CONST VOID **Handle,\r
+ OUT CONST CHAR8 **Token,\r
+ OUT CONST CHAR8 **Module,\r
+ OUT UINT64 *StartTimeStamp,\r
+ OUT UINT64 *EndTimeStamp\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ GAUGE_DATA_ENTRY *GaugeData;\r
+\r
+ ASSERT (Handle != NULL);\r
+ ASSERT (Token != NULL);\r
+ ASSERT (Module != NULL);\r
+ ASSERT (StartTimeStamp != NULL);\r
+ ASSERT (EndTimeStamp != NULL);\r
+\r
+ Status = GetPerformanceProtocol ();\r
+ if (EFI_ERROR (Status)) {\r
+ return 0;\r
+ }\r
+\r
+ Status = mPerformance->GetGauge (LogEntryKey++, &GaugeData);\r
+\r
+ //\r
+ // Make sure that LogEntryKey is a valid log entry key,\r
+ //\r
+ ASSERT (Status != EFI_INVALID_PARAMETER);\r
+\r
+ if (EFI_ERROR (Status)) {\r
+ //\r
+ // The LogEntryKey is the last entry (equals to the total entry number).\r
+ //\r
+ return 0;\r
+ }\r
+\r
+ ASSERT (GaugeData != NULL);\r
+\r
+ *Handle = (VOID *) (UINTN) GaugeData->Handle;\r
+ *Token = GaugeData->Token;\r
+ *Module = GaugeData->Module;\r
+ *StartTimeStamp = GaugeData->StartTimeStamp;\r
+ *EndTimeStamp = GaugeData->EndTimeStamp;\r
+\r
+ return LogEntryKey;\r
+}\r
+\r
+/**\r
+ Returns TRUE if the performance measurement macros are enabled.\r
+\r
+ This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
+ PcdPerformanceLibraryPropertyMask is set. Otherwise FALSE is returned.\r
+\r
+ @retval TRUE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
+ PcdPerformanceLibraryPropertyMask is set.\r
+ @retval FALSE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
+ PcdPerformanceLibraryPropertyMask is clear.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+PerformanceMeasurementEnabled (\r
+ VOID\r
+ )\r
+{\r
+ return (BOOLEAN) ((PcdGet8(PcdPerformanceLibraryPropertyMask) & PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);\r
+}\r
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