Freescale Semiconductor MPC8260 - Manual (Page 383)

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 I
2
O 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 Table 9-58 .
Figure 9-73. Inbound FIFO Queue Port Register (IFQPR)
31 20 19 16
Field QBA OPTP
Reset 0000_0000_0000_0000
R/W R R/W
Addr 0x104DA
15 2 1 0
Field OPTP —
Reset 0000_0000_0000_0000
R/W R/W R
Addr 0x104D8
Table 9-57. 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