MPC8280 datasheet(386/1386 Pages) FREESCALE

Part #	MPC8280

Description	PowerQUICC??II Family Reference Manual

PDF	1386 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

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386 / 1386 page

PCI Bridge

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

9-78

Freescale Semiconductor

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

9.12.3.4

I2O Registers

The following sections discuss 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 Table 9-58.

Field

QBA

OPTP

Reset

0000_0000_0000_0000

R/W

Addr

0x104DA

Field

OPTP

—

Reset

0000_0000_0000_0000

R/W

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.

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