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Some question about Memory_cache***** in DM6467

i have some question, the functions about Memory_cache*****.

If I call these functions in Linux(ARM side), they operate which side's cache ? or operation the both side?

If  I call these functions In DSP/BIOS(DSP side), they operate which side's cache ? or operation the both side?

this problem confused me long time, so i will be very appreciated if there is someone tell me the details