38 expansion rom translate value register - ertvr, 38expansion rom translate value register - ertvr, 178 expansion rom translate value register - ertvr – Intel CONTROLLERS 413808 User Manual

Page 325: Address translation unit (pci express)—intel, Bit default description, Intel

Intel

413808 and 413812 I/O Controllers in TPER Mode

October 2007

Developer’s Manual

Order Number: 317805-001US

325

Address Translation Unit (PCI Express)—Intel

413808 and 413812

3.17.38 Expansion ROM Translate Value Register - ERTVR

The Expansion ROM Translate Value Register 0 (ERTVR) in conjunction with the

“Expansion ROM Upper Translate Value Register - ERUTVR” on page 325

contain bits 35

to 12 of the internal bus address used to convert PCI Express Link addresses. The

converted address is driven on the internal bus as a result of the Expansion ROM

address translation.

3.17.39 Expansion ROM Upper Translate Value Register - ERUTVR

The Expansion ROM Upper Translate Value Register (ERUTVR) in conjunction with the

“Expansion ROM Translate Value Register - ERTVR” on page 325

contain bits 35 to12 of

the internal bus address used to convert PCI Express Link addresses. The converted

address is driven on the internal bus as a result of the Expansion ROM address

translation.

Table 178. Expansion ROM Translate Value Register - ERTVR

Bit

Default

Description

31:12

00000H

Expansion ROM Translation Value - This value represents bits 31 to 12 of the internal bus address used

to convert the PCI address to internal bus addresses. This value must be naturally aligned with the

ERBAR register’s programmed value (see

Section 3.17.15, “Determining Block Sizes for Base

Address Registers” on page 306

11:01

000H

Reserved

Big Endian Byte Swap enable - When set the ATU performs a byte swap on all PCI read transactions

through ERBAR. When clear, no swap is performed. Refer to

Section 3.4, “Big Endian Byte Swapping” on

page 255

for more details.

PCI

IOP

Attributes

Attribute Legend:

RV = Reserved

PR = Preserved

RS = Read/Set

RW = Read/Write

RC = Read Clear

RO = Read Only

NA = Not Accessible

Internal Bus Address Offset

+068H

Table 179. Expansion ROM Upper Translate Value Register - ERUTVR

Bit