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Handle case when PAL calls 13 or 14 may not be available. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3708 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
mdkinney 2007-08-27 01:01:44 +00:00
parent 055a4a3d79
commit 580ad4a03d
1 changed files with 11 additions and 7 deletions
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18
MdePkg/Library/SecPeiDxeTimerLibCpu/IpfTimerLib.c
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@ -152,13 +152,6 @@ GetPerformanceCounterProperties (
PAL_CALL_RETURN PalRet;
UINT64 BaseFrequence;
PalRet = PalCallStatic (NULL, 13, 0, 0, 0);
ASSERT (PalRet.Status == 0);
BaseFrequence = PalRet.r9;
PalRet = PalCallStatic (NULL, 14, 0, 0, 0);
ASSERT (PalRet.Status == 0);
if (StartValue != NULL) {
*StartValue = 0;
}
@ -167,5 +160,16 @@ GetPerformanceCounterProperties (
*EndValue = (UINT64)(-1);
}
PalRet = PalCallStatic (NULL, 13, 0, 0, 0);
if (PalRet.Status != 0) {
return 1000000;
}
BaseFrequence = PalRet.r9;
PalRet = PalCallStatic (NULL, 14, 0, 0, 0);
if (PalRet.Status != 0) {
return 1000000;
}
return BaseFrequence * (PalRet.r11 >> 32) / (UINT32)PalRet.r11;
}