Hi,

Can any one please help me regarding how to access LPC IO device (IO mapped IO) using LPC DMA. I know that we can access LPC memory mapped devices using DMA by DMA Base and Current registers. But For IO devices it has only IO INDEX PORT address and IO DATA address. So for these how DMA works.

Thanks,
Shiva

 

We're not mind readers. Mind telling us what chip you are using?

 

I am using Intel ICH6 chipset (Io Controller Hub). I want to enable DMA for Super IO devices which are communicating through IO Port. SIO chip is Winbond W83627HF.

We're not mind readers. Mind telling us what chip you are using?

 

Aaaand, you're writing your own OS?
Maybe you should read what Intel has to say about it's chipset.