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How to enable ECC check in Linux runing on powerpc P1020?

Question asked by Lei Zhang on May 12, 2014
Latest reply on May 15, 2014 by Yiping Wang

As topic says,I'm running a embedded linux(provideded by the develop board,that made by Yocto) on P1020.I need the ecc checking of P1020.So I try to mmap ddr's control register and modify the value of reigister DDR_SDRAM_CFG. But I failed.I can mmap ddr controllor's registers only with PROT_READ permission while other registers such as PVR can be mmap as PROT_READ|PROT_WRITE.Only if I mmap ddr's controllor reigister with PROT_WRITE permission,then linux will stop running .

So how can i enable ecc check under linux running p1020??

thansk very much.