Daughter Board Design

[Cospan]

I am interested in building a FPGA daughter

I want the board to be able to control the stack without any
processor, as well as working with the processor. In order to do that
I would like to use a CPLD to read/write flash memory, and configure
the FPGA when an "init" signal is sent to it.

My original idea was to have the CPLD memory addressable, but
unfortunately I am running out of IO, so I decided to use a spi
interface to read configuration data from the processor (so a user can
re-configure the FPGA without having to reset the system). My question
is this. Is there a chart, or a table somewhere that I can find which
resources of the processor are already being used by other daughter
cards? I don't want to build this thing, and then find that I am
unable to use something like the camera, or the ethernet board.

Dave