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dm8148 codec engine problem

I Have tested C6run examples and it works ok

now I am trying to test EZSDK codec engine examples.  

bootarg mem=256M,disabled rc3.d script,(disabled vpss and hdvicp).

mobprobe syslink and cmemk, with phy_mem_start=0x96c00000.

but kernel crush, report that:

BUG: your driver calls ioremap on system memory...

then I change bootarg mem=176M or less, the system will hang up

I think this has something to do with memory  map config.and memory map diffrent on 1G EVM and 512M EVM.