From 4ae5165ce62a930c531af098c3e8676840c18123 Mon Sep 17 00:00:00 2001
From: lzeng14 <lzeng14@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 17 Aug 2011 07:30:34 +0000
Subject: 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
---
 PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.c  | 17 +++++++++++------
 .../Library/DxeTscTimerLib/DxeTscTimerLib.inf           |  1 +
 2 files changed, 12 insertions(+), 6 deletions(-)

(limited to 'PerformancePkg')

diff --git a/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.c b/PerformancePkg/Library/DxeTscTimerLib/DxeTscTimerLib.c
index 95f2655..3e7e025 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 28978d7..8d2e6cf 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
-- 
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