Information on 64-bit PCI

[ashwin tv <ashwin_tv@yahoo.com>]

Hi all,
We have a 64-bit PCI  card with PLX9656. In order to
test the 64-bit support of our card,we installed our
card on a 64-bit PCI Slot with the Machine details as
below :

SunOS Release 5.8 Version Generic 64-bit 
System = SunOS
Node = lucent
Release = 5.8
KernelID = Generic
Machine = sun4u
BusType = <unknown>
Serial = <unknown>
Users = <unknown>
OEM# = 0
Origin# = 1
NumCPU = 2

We have a 64-bit compiler for the 64-bit driver which
we have written to access the SRAM on our card.

With this setup we are probing on PIN's REQ64# and
ACK64# along with SRAM_CS,SRAM_WR and SRAM_RD.

Here is our observations:

1) While booting we are getting a REQ64# and for which
there is no ACK64#.
2)When we write a 64-bit value to a location in SRAM,
We observed that in a single SRAM_CS(Chip Select) we
are observing two(2)SRAM_WR(write). If we read the
written 64-bit value, we are observing
two(2)SRAM_RD(Read) in a single SRAM_CS. Note that we
are not getting any signal on ACK64# and REQ64# pin.