AM5728: DSP access to dynamically allocated buffer

jack pan

Part Number: AM5728

DSP MMU use IPC Resource customTable to build TLB , now we need DSP access to the buffer dynamically allocated in linux, such as image capture buffer,

IPC Resource custom Table seem to be built static tlb only when dsp firmware is loading,

how to build dynamically tlb for new buffer when dsp is running. after the buffer is released,how to destroy the relative tlb?

thanks

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

The software team have been notified. They will respond here.

0 Garrett Ding over 9 years ago in reply to Biser Gatchev-XID

TI__Mastermind 43296 points

Hi Panxi,

Translation lookaside buffer TLB in MMU is statically built based on IPC resource table when DSP firmware is loaded. The buffers dynamically allocated in Linux is from DDR memory, which is separate from TLB. You need to ensure the DSP MMU TLB covers the buffer range allocated in Linux, so no need to destroy unused TLB.

Regards,
Garrett

0 jack pan over 9 years ago in reply to Garrett Ding

Prodigy 180 points

thanks,

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AM5728: DSP access to dynamically allocated buffer