809524 R
EVISION
D F
EBRUARY
2009
4-1
4
S
YSTEM
I
NTEGRATION
C
ONFIGURATION
OF
THE
PCI-P0 B
US
PMC-605 N
ON
-T
RANSPARENT
PCI-PCI B
RIDGING
The PMC-605 utilizes the Intel 21554 PCI-PCI Bridge device. The 21554 is a non-transparent
PCI-PCI bridge that acts a gateway to other PCI subsystems. It functions as a bridge
between two PCI domains: the local PCI bus domain and the PCI-PO bus domain.
The 21554 creates a configuration barrier between the two PCI domains. Standard
hierarchical PCI configuration methods using Type 1 configuration transactions cannot be
used to access the configuration space of devices on the opposite side of the 21554. Instead,
the internal registers of the 21554 such as the Setup Registers, Base Address Registers and
Address Translation Registers need to be configured before data can propagate between the
two PCI domains.
SVME/DMV-210 T
RANSPARENT
PCI-PCI B
RIDGING
The SVME/DMV-210 uses the Intel 21154 PCI-PCI Bridge device. The 21154 is a transparent
PCI-PCI bridge, and therefore the internal PCI bus of the SVME/DMV-210 is a transparent
extension to the PCI-P0 bus. The 21154 does allow configuration transactions to cross the
bridge. In a system with more than one SBC and one or more SVME/DMV-210 cards, only
one SBC should have responsibility for configuring the 21154 of the SVME/DMV-210 card.
Cross Reference
This section should be read in conjunction with the Intel application note Getting Started
with the 21554 Embedded PCI-to-PCI Bridge, number 278210-001, downloadable from the
Intel website at
http://developer.intel.com.
For a complete list and description of the Foundation Firmware used with the PMC-605, refer
to Appendix A of the Foundation Firmware User’s Manual, document number 808006.
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