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ARM Interrupt Register

Shri Ram
Note: This was originally posted on 9th May 2013 at http://forums.arm.com

I am working on Non-Secure Side and i want to find if a Interrupt is pending. What value should i look for to find out if an interrupt is pending in the register:
Highest Pending Interrupt Register (ICCHPIR)





The following URL is confusing:

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ihi0048a/CHDIFEDJ.html

Thanks
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  • Arm Employee Badge
    Note: This was originally posted on 9th May 2013 at http://forums.arm.com

    Are you interested in whether any interrupt is pending, or a specific interrupt is pending?

    If  "any" then you're looking for the register read not returning one of the reserved IDs (1020-1023).  Basically the register returns the IDs of the pending interrupt with the hightest priority.  If there are no pending interrupts it will return one of the those four reserved IDs.
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  • Arm Employee Badge
    Note: This was originally posted on 9th May 2013 at http://forums.arm.com

    Are you interested in whether any interrupt is pending, or a specific interrupt is pending?

    If  "any" then you're looking for the register read not returning one of the reserved IDs (1020-1023).  Basically the register returns the IDs of the pending interrupt with the hightest priority.  If there are no pending interrupts it will return one of the those four reserved IDs.
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