PCI Bridge
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor 9-77

Figure 9-72. Outbound Post_FIFO Tail Pointer Register (OPTPR)

9.12.3.4 I2O Registers

9.12.3.4.1 Inbound FIFO Queue Port Register (IFQPR)

IFQPR is used by PCI masters to access inbound messages in local memory. Local processor does not have

access to this port. IFQPR should be accessed only from the PCI bus. IFQPR is described in Figure 9-73

and Table9-58.

Figure 9-73. Inbound FIFO Queue Port Regist er (IFQPR)

31 20 19 16
Field QBA OPTP
Reset 0000_0000_0000_0000
R/W R R/W
Addr 0x104DA
15 210
Field OPTP
Reset 0000_0000_0000_0000
R/W R/W R
Addr 0x104D8

Table9-57. OPTPR Field Descriptions

Bits Name Description
31–20 QBA Queue base address. When read returns the contents of QBAR bits 31-20.
19–2 OPTP Outbound post_FIFO tail pointer. Local memory offset of the tail pointer of the outbound post
list FIFO.
1–0 Reserved, should be cleared.
31 16
Field IFQP
Reset 0000_0000_0000_0000
R/W R/W
Addr 0x10442
15 0
Field IFQP
Reset 0000_0000_0000_0000
R/W R/W
Addr 0x10440