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audk/ShellPkg/Library/UefiDpLib/DpUtilities.c

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/** @file
Utility functions used by the Dp application.
Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.
(C) Copyright 2015-2016 Hewlett Packard Enterprise Development LP<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 <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/TimerLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/PrintLib.h>
#include <Library/HiiLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiLib.h>
#include <Library/DevicePathLib.h>
#include <Library/HandleParsingLib.h>
#include <Pi/PiFirmwareFile.h>
#include <Library/DxeServicesLib.h>
#include <Protocol/LoadedImage.h>
#include <Protocol/DriverBinding.h>
#include <Protocol/ComponentName2.h>
#include <Protocol/DevicePath.h>
#include <Guid/Performance.h>
#include "Dp.h"
#include "Literals.h"
#include "DpInternal.h"
/**
Calculate an event's duration in timer ticks.
Given the count direction and the event's start and end timer values,
calculate the duration of the event in timer ticks. Information for
the current measurement is pointed to by the parameter.
If the measurement's start time is 1, it indicates that the developer
is indicating that the measurement began at the release of reset.
The start time is adjusted to the timer's starting count before performing
the elapsed time calculation.
The calculated duration, in ticks, is the absolute difference between
the measurement's ending and starting counts.
@param Measurement Pointer to a MEASUREMENT_RECORD structure containing
data for the current measurement.
@return The 64-bit duration of the event.
**/
UINT64
GetDuration (
IN OUT MEASUREMENT_RECORD *Measurement
)
{
UINT64 Duration;
BOOLEAN Error;
if (Measurement->EndTimeStamp == 0) {
return 0;
}
// PERF_START macros are called with a value of 1 to indicate
// the beginning of time. So, adjust the start ticker value
// to the real beginning of time.
// Assumes no wraparound. Even then, there is a very low probability
// of having a valid StartTicker value of 1.
if (Measurement->StartTimeStamp == 1) {
Measurement->StartTimeStamp = TimerInfo.StartCount;
}
if (TimerInfo.CountUp) {
Duration = Measurement->EndTimeStamp - Measurement->StartTimeStamp;
Error = (BOOLEAN)(Duration > Measurement->EndTimeStamp);
}
else {
Duration = Measurement->StartTimeStamp - Measurement->EndTimeStamp;
Error = (BOOLEAN)(Duration > Measurement->StartTimeStamp);
}
if (Error) {
DEBUG ((EFI_D_ERROR, ALit_TimerLibError));
Duration = 0;
}
return Duration;
}
/**
Determine whether the Measurement record is for an EFI Phase.
The Token and Module members of the measurement record are checked.
Module must be empty and Token must be one of SEC, PEI, DXE, BDS, or SHELL.
@param[in] Measurement A pointer to the Measurement record to test.
@retval TRUE The measurement record is for an EFI Phase.
@retval FALSE The measurement record is NOT for an EFI Phase.
**/
BOOLEAN
IsPhase(
IN MEASUREMENT_RECORD *Measurement
)
{
BOOLEAN RetVal;
RetVal = (BOOLEAN)( ( *Measurement->Module == '\0') &&
((AsciiStrnCmp (Measurement->Token, ALit_SEC, PERF_TOKEN_LENGTH) == 0) ||
(AsciiStrnCmp (Measurement->Token, ALit_PEI, PERF_TOKEN_LENGTH) == 0) ||
(AsciiStrnCmp (Measurement->Token, ALit_DXE, PERF_TOKEN_LENGTH) == 0) ||
(AsciiStrnCmp (Measurement->Token, ALit_BDS, PERF_TOKEN_LENGTH) == 0))
);
return RetVal;
}
/**
Get the file name portion of the Pdb File Name.
The portion of the Pdb File Name between the last backslash and
either a following period or the end of the string is converted
to Unicode and copied into UnicodeBuffer. The name is truncated,
if necessary, to ensure that UnicodeBuffer is not overrun.
@param[in] PdbFileName Pdb file name.
@param[out] UnicodeBuffer The resultant Unicode File Name.
**/
VOID
DpGetShortPdbFileName (
IN CHAR8 *PdbFileName,
OUT CHAR16 *UnicodeBuffer
)
{
UINTN IndexA; // Current work location within an ASCII string.
UINTN IndexU; // Current work location within a Unicode string.
UINTN StartIndex;
UINTN EndIndex;
ZeroMem (UnicodeBuffer, (DP_GAUGE_STRING_LENGTH + 1) * sizeof (CHAR16));
if (PdbFileName == NULL) {
StrnCpyS (UnicodeBuffer, DP_GAUGE_STRING_LENGTH + 1, L" ", 1);
} else {
StartIndex = 0;
for (EndIndex = 0; PdbFileName[EndIndex] != 0; EndIndex++)
;
for (IndexA = 0; PdbFileName[IndexA] != 0; IndexA++) {
if (PdbFileName[IndexA] == '\\') {
StartIndex = IndexA + 1;
}
if (PdbFileName[IndexA] == '.') {
EndIndex = IndexA;
}
}
IndexU = 0;
for (IndexA = StartIndex; IndexA < EndIndex; IndexA++) {
UnicodeBuffer[IndexU] = (CHAR16) PdbFileName[IndexA];
IndexU++;
if (IndexU >= DP_GAUGE_STRING_LENGTH) {
UnicodeBuffer[DP_GAUGE_STRING_LENGTH] = 0;
break;
}
}
}
}
/**
Get a human readable name for an image handle.
The following methods will be tried orderly:
1. Image PDB
2. ComponentName2 protocol
3. FFS UI section
4. Image GUID
5. Image DevicePath
6. Unknown Driver Name
@param[in] Handle
@post The resulting Unicode name string is stored in the
mGaugeString global array.
**/
VOID
DpGetNameFromHandle (
IN EFI_HANDLE Handle
)
{
EFI_STATUS Status;
EFI_LOADED_IMAGE_PROTOCOL *Image;
CHAR8 *PdbFileName;
EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
EFI_STRING StringPtr;
EFI_DEVICE_PATH_PROTOCOL *LoadedImageDevicePath;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_GUID *NameGuid;
CHAR16 *NameString;
UINTN StringSize;
CHAR8 *PlatformLanguage;
EFI_COMPONENT_NAME2_PROTOCOL *ComponentName2;
Image = NULL;
LoadedImageDevicePath = NULL;
DevicePath = NULL;
//
// Method 1: Get the name string from image PDB
//
Status = gBS->HandleProtocol (
Handle,
&gEfiLoadedImageProtocolGuid,
(VOID **) &Image
);
if (EFI_ERROR (Status)) {
Status = gBS->OpenProtocol (
Handle,
&gEfiDriverBindingProtocolGuid,
(VOID **) &DriverBinding,
NULL,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
Status = gBS->HandleProtocol (
DriverBinding->ImageHandle,
&gEfiLoadedImageProtocolGuid,
(VOID **) &Image
);
}
}
if (!EFI_ERROR (Status)) {
PdbFileName = PeCoffLoaderGetPdbPointer (Image->ImageBase);
if (PdbFileName != NULL) {
DpGetShortPdbFileName (PdbFileName, mGaugeString);
return;
}
}
//
// Method 2: Get the name string from ComponentName2 protocol
//
Status = gBS->HandleProtocol (
Handle,
&gEfiComponentName2ProtocolGuid,
(VOID **) &ComponentName2
);
if (!EFI_ERROR (Status)) {
//
// Get the current platform language setting
//
PlatformLanguage = GetBestLanguageForDriver(ComponentName2->SupportedLanguages, NULL, FALSE);
Status = ComponentName2->GetDriverName (
ComponentName2,
PlatformLanguage != NULL ? PlatformLanguage : "en-US",
&StringPtr
);
if (!EFI_ERROR (Status)) {
SHELL_FREE_NON_NULL (PlatformLanguage);
StrnCpyS (mGaugeString, DP_GAUGE_STRING_LENGTH + 1, StringPtr, DP_GAUGE_STRING_LENGTH);
mGaugeString[DP_GAUGE_STRING_LENGTH] = 0;
return;
}
}
Status = gBS->HandleProtocol (
Handle,
&gEfiLoadedImageDevicePathProtocolGuid,
(VOID **) &LoadedImageDevicePath
);
if (!EFI_ERROR (Status) && (LoadedImageDevicePath != NULL)) {
DevicePath = LoadedImageDevicePath;
} else if (Image != NULL) {
DevicePath = Image->FilePath;
}
if (DevicePath != NULL) {
//
// Try to get image GUID from image DevicePath
//
NameGuid = NULL;
while (!IsDevicePathEndType (DevicePath)) {
NameGuid = EfiGetNameGuidFromFwVolDevicePathNode ((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) DevicePath);
if (NameGuid != NULL) {
break;
}
DevicePath = NextDevicePathNode (DevicePath);
}
if (NameGuid != NULL) {
//
// Try to get the image's FFS UI section by image GUID
//
NameString = NULL;
StringSize = 0;
Status = GetSectionFromAnyFv (
NameGuid,
EFI_SECTION_USER_INTERFACE,
0,
(VOID **) &NameString,
&StringSize
);
if (!EFI_ERROR (Status)) {
//
// Method 3. Get the name string from FFS UI section
//
StrnCpyS (mGaugeString, DP_GAUGE_STRING_LENGTH + 1, NameString, DP_GAUGE_STRING_LENGTH);
mGaugeString[DP_GAUGE_STRING_LENGTH] = 0;
FreePool (NameString);
} else {
//
// Method 4: Get the name string from image GUID
//
UnicodeSPrint (mGaugeString, sizeof (mGaugeString), L"%g", NameGuid);
}
return;
} else {
//
// Method 5: Get the name string from image DevicePath
//
NameString = ConvertDevicePathToText (DevicePath, TRUE, FALSE);
if (NameString != NULL) {
StrnCpyS (mGaugeString, DP_GAUGE_STRING_LENGTH + 1, NameString, DP_GAUGE_STRING_LENGTH);
mGaugeString[DP_GAUGE_STRING_LENGTH] = 0;
FreePool (NameString);
return;
}
}
}
//
// Method 6: Unknown Driver Name
//
StringPtr = HiiGetString (gDpHiiHandle, STRING_TOKEN (STR_DP_ERROR_NAME), NULL);
ASSERT (StringPtr != NULL);
StrnCpyS (mGaugeString, DP_GAUGE_STRING_LENGTH + 1, StringPtr, DP_GAUGE_STRING_LENGTH);
FreePool (StringPtr);
}
/**
Calculate the Duration in microseconds.
Duration is multiplied by 1000, instead of Frequency being divided by 1000 or
multiplying the result by 1000, in order to maintain precision. Since Duration is
a 64-bit value, multiplying it by 1000 is unlikely to produce an overflow.
The time is calculated as (Duration * 1000) / Timer_Frequency.
@param[in] Duration The event duration in timer ticks.
@return A 64-bit value which is the Elapsed time in microseconds.
**/
UINT64
DurationInMicroSeconds (
IN UINT64 Duration
)
{
UINT64 Temp;
Temp = MultU64x32 (Duration, 1000);
return DivU64x32 (Temp, TimerInfo.Frequency);
}
/**
Get index of Measurement Record's match in the CumData array.
If the Measurement's Token value matches a Token in one of the CumData
records, the index of the matching record is returned. The returned
index is a signed value so that negative values can indicate that
the Measurement didn't match any entry in the CumData array.
@param[in] Measurement A pointer to a Measurement Record to match against the CumData array.
@retval <0 Token is not in the CumData array.
@retval >=0 Return value is the index into CumData where Token is found.
**/
INTN
GetCumulativeItem(
IN MEASUREMENT_RECORD *Measurement
)
{
INTN Index;
for( Index = 0; Index < (INTN)NumCum; ++Index) {
if (AsciiStrnCmp (Measurement->Token, CumData[Index].Name, PERF_TOKEN_LENGTH) == 0) {
return Index; // Exit, we found a match
}
}
// If the for loop exits, Token was not found.
return -1; // Indicate failure
}
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