Arm Development Studio forum exclusive access in Origen board

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exclusive access in Origen board

Note: This was originally posted on 16th September 2012 at http://forums.arm.com

hi, i'm making a little distributive calculation project on Origen board almost totally based on CortexA2x2_RTSM example downloaded from this site.

everything goes fine, until lockMutex realization. strex instruction always returns 1, even though, it writes value to memory. seems that monitors didn't tag physical address as exclusive access after ldrex instruction, but mmu was turned on fine and memory range that contains mutex-values was "normal sharable" (this part was taken totally from CortexA2x2_RTSM).

please. help me to figure out what the problem is.