DMA on IO mapped devices

Discussion in 'Embedded Systems and Microcontrollers' started by shiva2shetty, Feb 7, 2012.

  1. shiva2shetty

    Thread Starter New Member

    Feb 7, 2012
    3
    0
    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
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    We're not mind readers. Mind telling us what chip you are using?
     
  3. shiva2shetty

    Thread Starter New Member

    Feb 7, 2012
    3
    0
    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.


     
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    Aaaand, you're writing your own OS?
    Maybe you should read what Intel has to say about it's chipset.
     
Loading...