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Allocate memory buffer to store TscFrequency, and InstallConfigurationTable with the pointer to this buffer. 

Signed-off-by: lzeng14
Reviewed-by: lgao4


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12151 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
lzeng14 2011-08-17 07:30:34 +00:00
parent 46171fb68e
commit 4ae5165ce6
2 changed files with 14 additions and 8 deletions
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21
PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.c
View File

@ -38,6 +38,7 @@
#include <Library/PciLib.h> #include <Library/PciLib.h>
#include <Library/PcdLib.h> #include <Library/PcdLib.h>
#include <Library/UefiLib.h> #include <Library/UefiLib.h>
#include <Library/DebugLib.h>
#include <Guid/TscFrequency.h> #include <Guid/TscFrequency.h>
@ -117,15 +118,19 @@ DxeTscTimerLibConstructor (
} }
EndTSC = AsmReadTsc(); // TSC value 1ms later EndTSC = AsmReadTsc(); // TSC value 1ms later
mTscFrequency = MultU64x32 ( Status = gBS->AllocatePool (EfiBootServicesData, sizeof (UINT64), &TscFrequency);
(EndTSC - StartTSC), // Number of TSC counts in 1ms ASSERT_EFI_ERROR (Status);
1000 // Number of ms in a second
);
//
// mTscFrequency is now equal to the number of TSC counts per second, install system configuration table for it.
//
gBS->InstallConfigurationTable (&gEfiTscFrequencyGuid, &mTscFrequency);
*TscFrequency = MultU64x32 (
(EndTSC - StartTSC), // Number of TSC counts in 1ms
1000 // Number of ms in a second
);
//
// TscFrequency now points to the number of TSC counts per second, install system configuration table for it.
//
gBS->InstallConfigurationTable (&gEfiTscFrequencyGuid, TscFrequency);
mTscFrequency = *TscFrequency;
return EFI_SUCCESS; return EFI_SUCCESS;
} }

1
PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.inf
View File

@ -49,6 +49,7 @@
IoLib IoLib
BaseLib BaseLib
UefiLib UefiLib
DebugLib
[Guids] [Guids]
gEfiTscFrequencyGuid ## CONSUMES ## System Configuration Table gEfiTscFrequencyGuid ## CONSUMES ## System Configuration Table