PCI core with expansion ROM support

[fpgaiua]

Good day,
I'm working now with Spartan3 PCI project using the pci32tlite core.
But it doesn't support expansion ROM (onboard BIOS) from scratch.
Where can I find free PCI IP-core which support expansion ROM.
Or maybe someone has experience with adding support of expansion ROM t
some of opencores.org PCI core...
Big thanks for any help!

best wishes,
Anatol
fpga[at]i.ua



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[scrts]

"fpgaiua" <fpga@n_o_s_p_a_m.i.ua> wrote in message
news:j-mdnQ-uufQUDx3TnZ2dnUVZ_sadnZ2d@giganews.com...

Good day,
I'm working now with Spartan3 PCI project using the pci32tlite core.

Small question: is the pci core from opencores works fine?

 

[Andreas Ehliar]

On 2011-09-27, scrts <hidden@email.com> wrote:

"fpgaiua" <fpga@n_o_s_p_a_m.i.ua> wrote in message
news:j-mdnQ-uufQUDx3TnZ2dnUVZ_sadnZ2d@giganews.com...
Good day,
I'm working now with Spartan3 PCI project using the pci32tlite core.

Small question: is the pci core from opencores works fine?

We used it in an Ethernet NIC project a long time ago and it worked well.
Unfortunately it had severe performance issues with repeated burst reads
and writes. The problem was that the FIFO:s in the PCI bridge didn't
implement any sort of high watermark/low watermark system. So as soon as
the FIFO was full you could only fill the FIFO with a transaction that was
one word long. At this point the performance of the system could not be
recovered if the injection rate did not decrease significantly.

More information about our experiences can be found here:
ihttp://liu.diva-portal.org/smash/get/diva2:22746/FULLTEXT01

regards
/Andreas

 

[peio]

There are, several PCI cores on Opencores. The one used in the Ethernet NI
project is "PCI Bridge", and the core used by Anatol is "pci32tlite". Th
last one, is thought for simple PCI peripherals. It's small and withou
FIFO.

On 2011-09-27, scrts <hidden@email.com> wrote:
"fpgaiua" <fpga@n_o_s_p_a_m.i.ua> wrote in message
news:j-mdnQ-uufQUDx3TnZ2dnUVZ_sadnZ2d@giganews.com...
Good day,
I'm working now with Spartan3 PCI project using the pci32tlite core.

Small question: is the pci core from opencores works fine?

We used it in an Ethernet NIC project a long time ago and it worked well.
Unfortunately it had severe performance issues with repeated burst reads
and writes. The problem was that the FIFO:s in the PCI bridge didn't
implement any sort of high watermark/low watermark system. So as soon as
the FIFO was full you could only fill the FIFO with a transaction tha
was
one word long. At this point the performance of the system could not be
recovered if the injection rate did not decrease significantly.

More information about our experiences can be found here:
ihttp://liu.diva-portal.org/smash/get/diva2:22746/FULLTEXT01

regards
/Andreas

---------------------------------------
Posted through http://www.FPGARelated.com