DMA Framework (more than 1 dma peripheral)

"Rishabh Kumar Goel" <[email protected]> Wed, 10 Dec 2003 18:07:46 +0530

Newsgroups	gmane.os.netbsd.ports.evbmips,gmane.os.netbsd.ports.mips.devel,gmane.os.netbsd.devel.general
Message-ID	<[email protected]>

Hi all,
 
I am working on evbmips port of NetBSD. The processor has 1 PCI DMA
controller and there is one more controller with 4 channels. This DMA is
shared between Serial i/o and ACLC controller. 
 
How can this be done? 
The bus_space_dma framework is being initialized for PCI DMA
controller(single channel, dedicated). Can we have another instance of
bus_space_dma framework for the other controller? If yes then, in that
case how can we manage this sharing of DMA channels between Serial i/o
and ACLC.
 
Regards,
Rishabh