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ARM Interrupt Register
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Shri Ram
over 7 years ago
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
Offline
Shri Ram
over 7 years ago
Note: This was originally posted on 10th May 2013 at
http://forums.arm.com
I work on both secure and non-secure sides and
I am checking from the Non-Secure Side:
---------------------------------------------------------
My Condition is "NO Non-Secure Interrupt Pending"? - I check for the value 1023. That is If the register read returns 1023 - I assume that there are no non secure interrupts pending. Is this correct?
I am checking from the Secure Side
-------------------------------------------------
My Condition is "NO Non-Secure Interrupt Pending"? - I check for the value 1023. That is If the register read returns 1023 - I assume that there are no non-secure interrupts are pending. Is this correct?
Is my understanding correct?
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Martin Weidmann
over 7 years ago
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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