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Altera_Forum's avatar
Altera_Forum
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19 years ago

DMA driver

Is there anybody who had writen dma driver?or who can show his relative code to me ,and I can learn from it.Thanks. Recently,I'm studying driver under uClinux.In my nios2 processor,I use dma to t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

You can look at the DMA driver in linux-2.6.x/arch/nios2nommu/kernel/dma.c .

The dma memory should be uncached or you need flush cache before dma.