allocating memory inside a timer callback function

dcarrozza

Can someone tell me if you should be able to allocate memory within a PRD timer callback function? In the dspbios API ref guide, it states MEM_alloc cannot be called from a SWI or HWI. Does a PRD timer callback function fall under an SWI condition?

Thanks.

dcarrozza

over 16 years ago

Bernie Thompson TI over 16 years ago

TI__Mastermind 41665 points

Unfortunately you cannot, a PRD function is the same context as a SWI as it is a SWI that drives the PRD functions, this is discussed a bit in section 4.9.1 of SPRU303.

Though this is not directly your question, for others out there who wonder what can be called where in BIOS, there is a function callability table in appendix A1 of SPRU403.

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allocating memory inside a timer callback function