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CONFIG_BFIN_SCRATCH_REG_CYCLES: CYCLES

General informations

The Linux kernel configuration item CONFIG_BFIN_SCRATCH_REG_CYCLES:

Help text

Use the CYCLES register in the Blackfin exception handler as a stack scratch register. This means you cannot safely use the CYCLES performance registers on a Blackfin board at anytime, but you can debug the system with a JTAG ICE and use the NMI.

If you are unsure, please select "RETN".

Hardware

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