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CNTFRQ register on Cortex-A8

John Conover
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  • Arm Employee Badge
    Note: This was originally posted on 21st October 2012 at http://forums.arm.com

    The forums (and the Cortex-A8 docs) are correct, this register is not present.
    The ARM architecture includes a number of optional features. A given implementation (I.e. processor) chooses which of the optional features to implement. The CNTFRQ register is part of the optional Generic Timer spec.  As far as I know, only the CA15 and CA7 implement this.
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  • Arm Employee Badge
    Note: This was originally posted on 21st October 2012 at http://forums.arm.com

    The forums (and the Cortex-A8 docs) are correct, this register is not present.
    The ARM architecture includes a number of optional features. A given implementation (I.e. processor) chooses which of the optional features to implement. The CNTFRQ register is part of the optional Generic Timer spec.  As far as I know, only the CA15 and CA7 implement this.
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