>> FIQ exception is not implemented in Linux Kernel. >> Actually, when ARM CPU takes FIQ exception, it branches to 0xffff001c >> address, which contains the below code from entry-armv.S: >> vector_fiq: >> disable_fiq >> subs pc, lr, #4 >> >> Now, disable_fiq not implemented for all the platforms. >> But, anyway, 'subs pc, lr, #4' returns the CPU to the point where >> FIQ exception has happened and the system continues to run as usual. > > As you said, disable_fiq is empty in OMAP architecture. > .macro disable_fiq > .endm > > So from the above explanation,I can saythat LINUX is not making use of > FIQ feature of arm.Am I right? Absolutely. --- Kosta _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
