mem=XXXM ioremap DMA

Sylvain Munaut tnt at
Mon Jan 29 19:06:58 EST 2007

Eric Nuckols wrote:
> in my driver, I'm calling
> my_virt_address =   ioremap( 0x1F800000, 0x800000  );
> my_bus_address = virt_to_bus( my_virt_address );
You can't use virt_to_bus on address returned by ioremap AFAIK.

I think you could do
my_bus_address = virt_to_bus(phys_to_virt(0x1f800000));

Altough it slightly misuse the functions ... but that should work.


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