Freescale Semiconductor MPC8260 - Manual (Page 330)

PCI Bridge
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
9-24 Freescale Semiconductor
Figure 9-14. Address Map Example
9.10.1 Address Map Programming
The address map has a number of programmable ranges to determine the PCI bridge’s response to all
transactions. The following are the PCI bridge’s rules for programming each address range:
• All address regions should not overlap but do not have to be contiguous.
• All address ranges must be aligned on a multiple of the region size.
• Inbound and outbound windows for the same bus should not overlap. This means that a situation
where an inbound window translation points back into an outbound window, or a situation where
an outbound translation window points back into an inbound window, are not allowed.
9.10.2 Address Translation
The address translation registers allow the remapping of inbound and outbound transactions. The reset
configuration for outbound transactions are that all outbound requests from the core side of the PCI bridge
Address translation
Address translation
Address translation
Internal registers
Address translation
Address translation
Internal registers
PCI master memory view PCI master I/O view 60x bus master view
0 0 0
4G 4G 4G
PCI bridge
PCI memory