On 2016/8/11 21:41, Brian J. Johnson wrote:
On 08/10/2016 09:37 PM, Star Zeng wrote:
Minimize the code overhead between the two TSC reads by adding
new internal API to calculate TSC Frequency instead of reusing
MicroSecondDelay ().
Why not just use the MSR_PLATFORM_INFO (0xce) register bits 15..8, on
CPUs where it's available, to read the TSC frequency directly?
Per my understanding, not every generation CPU has this
MSR_PLATFORM_INFO (0xce) register defined, and also MSR_PLATFORM_INFO
(0xce) register bits 15..8 is just the ratio, then the radio needs to
multiply external clock frequency which may be different for various
generation CPU.
I believe the library's position stands as a generic library and not for
specific CPU.
Thanks,
Star
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