QG5000X S L9TH Intel, QG5000X S L9TH Datasheet - Page 48
QG5000X S L9TH
Manufacturer Part Number
QG5000X S L9TH
Description
Manufacturer
Intel
Datasheet
1.QG5000X_S_L9TH.pdf
(458 pages)
Specifications of QG5000X S L9TH
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3.3.3
Figure 3-2.
3.4
48
CONFIG_ADDRESS
Primary PCI and Downstream Configuration Mechanism
If the Bus Number in the CONFIG_ADDRESS is non-zero, the MCH will generate a Type
1 PCI configuration cycle. A[1:0] of the ESI request packet for the Type 1 configuration
cycle will be 01. Bits 31:2 of the CONFIG_ADDRESS register will be translated to the
A[31:2] field of the ESI request packet of the configuration cycle as shown in
Figure
I/O Controller Hub.
If the cycle is forwarded to the Intel 631xESB/632xESB I/O Controller Hub via ESI, the
Intel 631xESB/632xESB I/O Controller Hub compares the non-zero Bus Number with
the Secondary Bus Number and Subordinate Bus Number Registers of its PCI-to-PCI
bridges to determine if the configuration cycle is meant for primary PCI bus, one of the
Intel 631xESB/632xESB I/O Controller Hub’s PCI Express ports, or a downstream PCI
bus.
Type 1 Configuration Address to PCI Address Mapping
Device Mapping
Each component in a Intel® 5000X chipset system is uniquely identified by a PCI bus
address consisting of; Bus Number, Device Number and Function Number. Device
configuration is based on the PCI Type 0 configuration conventions. All PCI devices
within a Intel® 5000X chipset platform must support Type 0 configuration accesses. All
MCH registers in the Intel® 5000X chipset MCH appear on Bus #0.
All Intel® 5000X chipset MCH configuration registers reside in the configuration space
defined by Bus, Device, Function, Register address. Some registers do not appear in all
portions of this space and some mechanisms do not access all portions of this space. In
general the configuration space is sparsely populated. The following table defines
where the various fields of configuration register addresses appear. Each row defines a
different access mechanism, register, interface, or decoder. Each column defines a
different field of the configuration address.
PCI Address
AD[31:0]
3-2. This configuration cycle will be sent over the ESI to Intel 631xESB/632xESB
31
3
1
1
3
0
Reserved
0
2
4
2
4
2
3
2
3
Bus Number
Number
Bus
16 15
16 15
Device Number
Intel
Number
Device
®
5000X Chipset Memory Controller Hub (MCH) Datasheet
11
1
1
1
0
Function Number
Function Number
1
0
8
8 7
7
Reg. Index
Index
Reg.
2 1
2
Register Description
1
X X
0 1
0
0
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