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

2 files changed, 12 insertions, 6 deletions

diff --git a/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.c b/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.c
index 95f265558c..3e7e0254a6 100644
--- a/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.c
+++ b/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.c
@@ -38,6 +38,7 @@
 #include <Library/PciLib.h>

 #include <Library/PcdLib.h>

 #include <Library/UefiLib.h>

+#include <Library/DebugLib.h>

 

 #include <Guid/TscFrequency.h>

 

@@ -117,15 +118,19 @@ DxeTscTimerLibConstructor (
   }

   EndTSC = AsmReadTsc();    // TSC value 1ms later

 

-  mTscFrequency =   MultU64x32 (

-                      (EndTSC - StartTSC),    // Number of TSC counts in 1ms

-                      1000                    // Number of ms in a second

-                    );

+  Status = gBS->AllocatePool (EfiBootServicesData, sizeof (UINT64), &TscFrequency);

+  ASSERT_EFI_ERROR (Status);

+

+  *TscFrequency = MultU64x32 (

+                    (EndTSC - StartTSC),      // Number of TSC counts in 1ms

+                    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.

+  // TscFrequency now points to the number of TSC counts per second, install system configuration table for it.

   //

-  gBS->InstallConfigurationTable (&gEfiTscFrequencyGuid, &mTscFrequency);

+  gBS->InstallConfigurationTable (&gEfiTscFrequencyGuid, TscFrequency);

 

+  mTscFrequency = *TscFrequency;

   return EFI_SUCCESS;

 }

 

diff --git a/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.inf b/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.inf
index 28978d78c7..8d2e6cf8bb 100644
--- a/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.inf
+++ b/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.inf
@@ -49,6 +49,7 @@
   IoLib

   BaseLib

   UefiLib

+  DebugLib

 

 [Guids]

   gEfiTscFrequencyGuid                          ## CONSUMES ## System Configuration Table