added PcdPlatformBusSpeed for BaseTimerLibLocalApic, thus this timer instance needn't depend on types of CPUs

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1909 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 3 insertions, 12 deletions

diff --git a/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c b/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
index 87c33a7c5d..d2935cf83a 100644
--- a/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
+++ b/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
@@ -19,18 +19,9 @@
 **/

 

 //

-// The following 2 arrays are used in calculating the frequency of local APIC

+// The following array is used in calculating the frequency of local APIC

 // timer. Refer to IA-32 developers' manual for more details.

 //

-

-GLOBAL_REMOVE_IF_UNREFERENCED

-CONST UINT32                          mTimerLibLocalApicFrequencies[] = {

-  100000000,

-  133000000,

-  200000000,

-  166000000

-};

-

 GLOBAL_REMOVE_IF_UNREFERENCED

 CONST UINT8                           mTimerLibLocalApicDivisor[] = {

   0x02, 0x04, 0x08, 0x10,

@@ -73,7 +64,7 @@ InternalX86GetTimerFrequency (
   )

 {

   return

-    mTimerLibLocalApicFrequencies[AsmMsrBitFieldRead32 (44, 16, 18)] /

+    PcdGet32(PcdPlatformBusSpeed) /

     mTimerLibLocalApicDivisor[MmioBitFieldRead32 (ApicBase + 0x3e0, 0, 3)];

 }

 

@@ -255,5 +246,5 @@ GetPerformanceCounterProperties (
     *EndValue = 0;

   }

 

-  return (UINT64)InternalX86GetTimerFrequency (ApicBase);

+  return PcdGet32(PcdPlatformBusSpeed);

 }