Intel Xeon X3460 BX80605X3460 User Manual
Product codes
BX80605X3460
Intel® Xeon® Processor 3400 Series Datasheet, Volume 2
17
Introduction
1
Introduction
This is Volume 2 of the Datasheet for the Intel
®
Xeon
®
processor 3400 series.
The processor contains one or more PCI devices within a single physical component.
The configuration registers for these devices are mapped as devices residing on the PCI
Bus assigned for the processor socket. This document describes these configuration
space registers or device-specific control and status registers (CSRs) only. This
document does NOT include Model Specific Registers (MSRs).
The configuration registers for these devices are mapped as devices residing on the PCI
Bus assigned for the processor socket. This document describes these configuration
space registers or device-specific control and status registers (CSRs) only. This
document does NOT include Model Specific Registers (MSRs).
Note:
Throughout this document, the Intel
®
Xeon
®
processor 3400 series may be referred to
as “processor”.
Note:
Througout this document, the Intel
®
3400 series Chipset Platform Controller Hub is
also referred to as “PCH”.
Note:
The term “SRV” refers to server platforms.
1.1
Register Terminology
Registers and register bits are assigned one or more of the following attributes. These
attributes define the behavior of register and the bit(s) that are contained with in. All
bits are set to default values by hard reset. Sticky bits retain their states between hard
resets.
attributes define the behavior of register and the bit(s) that are contained with in. All
bits are set to default values by hard reset. Sticky bits retain their states between hard
resets.
i
Term
Description
RO
Read Only. If a register bit is read only, the hardware sets its state. The bit may be read
by software. Writes to this bit have no effect.
WO
Write Only. The register bit is not implemented as a bit. The write causes some hardware
event to take place.
RWO
Read/Write Once. These bits can be read by software. After reset, these bits can only
be written by software once, after which the bits becomes ‘Read Only’.
RW
Read/Write. A register bit with this attribute can be read and written by software.
RC
Read Clear. The bit or bits can be read by software, but the act of reading causes the
value to be cleared.
RCW
Read Clear/Write. A register bit with this attribute will get cleared after the read. The
register bit can be written.
RW1C
Read/Write 1 Clear. A register bit with this attribute can be read or cleared by software.
In order to clear this bit, a one must be written to it. Writing a zero will have no effect.
RW0C
Read/Write 0 Clear. A register bit with this attribute can be read or cleared by software.
In order to clear this bit, a zero must be written to it. Writing a one will have no effect.
ROS
RO Sticky. These bits can only be read by software, writes have no effect. The value of
the bits is determined by the hardware only. These bits are only re-initialized to their
default value by a PWRGOOD reset.
RWS
R/W Sticky.These bits can be read and written by software. These bits are only re-
initialized to their default value by a PWRGOOD reset.
RW1S
Read/Write 1 Set. A register bit can be either read or set by software. In order to set
this bit, a one must be written to it. Writing a zero to this bit has no effect. Hardware will
clear this bit.
RW0S
Read/Write 0 Set. A register bit can be either read or set by software. In order to set
this bit, a zero must be written to it. Writing a one to this bit has no effect. Hardware will
clear this bit.
RWL
Read/Write/Lock. A register bit with this attribute can be read or written by software.
Hardware or a configuration bit can lock the bit and prevent it from being updated.