What is _lwmem_test, _mem_test, _mem_test_all, etc..., actually doing? Is it testing the RAM for hard/soft errors? Is it doing something that would actually be comparable to a real RAM test like a GALPAT, walkpat, or march test? I am using the MCF52259 with MQX. I have a requirement to implement a RAM test on bootup, and am trying to figure out if this would cover it or if I need something more.