Changes between Version 5 and Version 6 of dma_driver


Ignore:
Timestamp:
Mar 13, 2015, 10:39:21 AM (9 years ago)
Author:
alain
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • dma_driver

    v5 v6  
    1010        dma_id = cluster_xy * NB_DMA_CHANNELS + local_index
    1111
    12 A DMA channel is a private ressource allocated to a given processor. It is exclusively used by the kernet to speedup data transfers, and
    13 there is no lock protecting exclusive access to the channel. As the kernel uses a polling policy on the DMA_STATUS register to detect
    14 transfer completion, the DMA IRQ is not used.
     12It is exclusively used by the kernel to speedup data transfers.
     13As the kernel uses a polling policy on the DMA_STATUS register to detect transfer completion, the DMA IRQ is not used.
    1514
    1615The virtual base address of the segment associated to a channel is: