SR3_FRAME_BUFFER_EXTRA cannot be used to allocate any buffers on M3 that are accessed by CPU.
It looks like capture driver is doing CPU access of frame buffers.This is not expected.
Pls collect the exception trace to be able to identify the call stack.
Also confirm you don't have VPS_CAPT_DO_FRAME_TAGGING_FOR_FRAME_DROP_ISSUE define enabled in HDVPSS driver build
Check these posts to get exception trace
http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/305805/1064884.aspx#1064884
http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/250529/876689.aspx#876689