* [ECOS] How to support DMA in an eCos driver
@ 2005-08-17 0:59 Tianjun-ZDK
2005-08-17 7:23 ` Gary Thomas
0 siblings, 1 reply; 2+ messages in thread
From: Tianjun-ZDK @ 2005-08-17 0:59 UTC (permalink / raw)
To: eCos Disuss
Hi,evrybody
I am have a question:
i write a driver for a PCI device,and must support DMA,
but i cannot find any document which introduce this.
Can anybody tell me how to allocate the shared memory
for DMA,and how to get the physical address of a allocated
memory,or how to carry out DMA ?
thanks a lot~!
Sincerely yours,
Tian-Jun
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* Re: [ECOS] How to support DMA in an eCos driver
2005-08-17 0:59 [ECOS] How to support DMA in an eCos driver Tianjun-ZDK
@ 2005-08-17 7:23 ` Gary Thomas
0 siblings, 0 replies; 2+ messages in thread
From: Gary Thomas @ 2005-08-17 7:23 UTC (permalink / raw)
To: Tianjun-ZDK; +Cc: eCos Discussion
On Wed, 2005-08-17 at 08:59 +0800, Tianjun-ZDK wrote:
> Hi,evrybody
>
> I am have a question:
>
> i write a driver for a PCI device,and must support DMA,
>
> but i cannot find any document which introduce this.
>
> Can anybody tell me how to allocate the shared memory
>
> for DMA,and how to get the physical address of a allocated
>
> memory,or how to carry out DMA ?
>
> thanks a lot~!
There is no generic DMA support in eCos - it's done on an
ad hoc basis, per platform.
What target/platform does your device run on?
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
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2005-08-17 0:59 [ECOS] How to support DMA in an eCos driver Tianjun-ZDK
2005-08-17 7:23 ` Gary Thomas
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