Thank you Grissiom.... On Tuesday, March 11, 2014 10:19:28 AM UTC+9, Grissiom Gu wrote: > > On Mon, Mar 10, 2014 at 11:00 PM, Paddu <[email protected]<javascript:> > > wrote: > >> >> Hi, >> >> Thank you for sharing very useful information. >> With your suggestions currently I am able to read the Cycle count using >> using this register. >> Please let me ask more question about CCNT register. >> >> Just for the confirmation, I would like to know is this a 32 bit >> register? or 64 bit? >> and what would happen if the count value is overflown, will the register >> reset to "0" ? >> > > It is a 32bit register(use "mrc" to read it instead of "mrrc"). If you are > afraid of overflow and don't want to deal with the interrupt, you could set > the D bit in PMCR register(c9, c12, 0). Than PMU will divide the cycle with > 64. > > -- > Cheers, > Grissiom >
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