Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

How to get Physical Address in uClinux with MMU

Hi~ I am using uClinux with mmu right now. and I want to write a driver for SGDMA(Stream to Memory). I need physical address to set up SGDMA. Is there anyone know about it? Right Now...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I don't think it's a good idea to do DMA from a user land program.

If you have a device driver that allows the user program to do mmap, why not enhance same to do the DMA stuff ?

-Michael