Using partitions in (Arcnet) device drivers?

[Bill Butler]

Ian,

EEK!.. I'm currently writing code that I rely on Partitions heavily -- I
am using the SPxx test code as examples and trust that it works.

Also, Ian, I have a pretty good BSP for the 5307 if you want it. It is
not 100% complete but it's close. One thing that might be a limitation
is it does not initialize SDRam, because my code runs in SDram and that
would kind of be a trick to initial what I'm already relying on :).

If you want it let me know.



Bill Butler
Project Lead
Sr Software Engineer
AIPCOM Inc
(972) 644-2328 (x16)

> -----Original Message-----
> From: Ian Caddy [mailto:ianc at microsol.iinet.net.au]
> Sent: Wednesday, June 26, 2002 12:56 AM
> To: rtems list
> Subject: Using partitions in (Arcnet) device drivers?
> 
> Hi All,
> 
> We are in the process of putting an arcnet device driver into our
RTEMS
> BSP for the Coldfire 5307.
> 
> By the end of it, we hope to have the Arcnet device driver supporting
> both the legacy packet interface of an existing product but at the
same
> time putting a layer in so we can use IP over the Arcnet also.
> 
> Our Arcnet is configured to only have 256 byte packets, and we need
> somewhere to put them when they are received.
> 
> We have two options available to us, the first is to get the number of
> buffers required off the heap and then manage them ourselves.
> 
> The second option is to create partition for the buffers and then let
> RTEMs manage the buffers for us.
> 
> We are working on the 4.5.0 release of RTEMs and I did a quick search
> through the tree and no-one in the RTEMs system seems to use any
> partitions.  There are some used in the tests.
> 
> Is there some reason why partitions have not been used, as it looks
like
> exactly what we need for this device driver?
> 
> Also, just a note on the SMC91C111 Ethernet port we were doing.  It is
> complete now with DMA and working well, but I have been dragged off it
> for some time.  I still haven't managed to move it into the libchip
area
> but it is still on my list of things to do.  I just need to make sure
> the Arcnet is running also and then I will get back to it.
> 
> regards,
> 
> 
> Ian Caddy
> 
> --
> 
> ianc at microsol.iinet.net.au
> Microsol (Aust) Pty Ltd
> 
> Phone: (+61) 08 9473 6600
> Fax:   (+61) 08 9473 6699