Transactions From The Coherency System Bus (Csb) Port; Transactions From The Pci Port; Transactions From The Dma Port; Pci Outbound Address Translation - Freescale Semiconductor MPC8313E Family Reference Manual

11.5.1.1

Transactions from the Coherency System Bus (CSB) Port

Transactions from the CSB port are forwarded as follows:
• If the address matches the 12-byte PCI controller software configuration memory space of the PCI
controller, the transaction is forwarded to the PCI port. These address values are configuration
options of the I/O sequencer. See
configuration memory space.
• If the address matches the DMA register memory space, the transaction is forwarded to the DMA
port.
• If the address hits any of the outbound translation windows, the transaction is forwarded to the PCI
port, with the address translated. See
more information.
11.5.1.2

Transactions from the PCI Port

Transactions from the PCI port are forwarded as follows:
• If the address matches the DMA register memory space, the transaction is forwarded to the DMA
port.
• All other transactions are forwarded to the CSB port.
11.5.1.3

Transactions from the DMA Port

Transactions from the DMA port are forwarded as follows:
• If the address hits any of the outbound translation windows, the transaction is forwarded to the PCI
port, with the address translated. See
more information.
• All other transactions are forwarded to the CSB port.
11.5.2

PCI Outbound Address Translation

Outbound address translation is provided to allow the outbound transactions to access any address over the
PCI memory or I/O space. Translation window base addresses are defined in the PCI outbound base
address registers. See Section 11.4.2, "PCI Outbound Base Address Registers (POBARn),"
information. Transactions to these address ranges are issued on the PCI bus with a translated address. The
translation addresses are defined in the associated PCI outbound translation address registers (POTARs).
MPC8313E PowerQUICC II Pro Integrated Processor Family Reference Manual, Rev. 3
Freescale Semiconductor
Table 13-3 for more information on PCI controller software
Section 11.5.2, "PCI Outbound Address Translation,"
Section 11.5.2, "PCI Outbound Address Translation,"
Sequencer
for
for
for more
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