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PCI Hot-Plug
Specification
Revision 1.1
June 20, 2001
Revision 1.1
2
Revision Revision History Date
1.0 Original issue. October 6, 1997
1.1 Add PCI 2.2, PCI power management, PCI-X, and
SMBus.
June 20, 2001
PCI-SIG disclaims all warranties and liability for the use of this document and the information
contained herein and assumes no responsibility for any errors that may appear in this document,
nor does PCI-SIG make a commitment to update the information contained herein.
Contact the PCI-SIG office to obtain the latest revision of the specification.
Questions regarding the PCI Hot-Plug Specification or membership in PCI-SIG may be
forwarded to:
Membership Services
http://www.pcisig.com
E-mail: administration@pcisig.com
Phone: 503-291-2569
Fax: 503-297-1090
Technical Support
Technical Support for this specification is available to members. For information, please
visit: http://www.pcisig.com/developers/technical_support.
DISCLAIMER
This PCI Hot-PlugSpecification is provided “as is” with no warranties whatsoever,
including any warranty of merchantability, noninfringement, fitness for any particular
purpose, or any warranty otherwise arising out of any proposal, specification, or sample.
PCI-SIG disclaims all liability for infringement of proprietary rights, relating to use of
information in this specification. No license, express or implied, by estoppel or
otherwise, to any intellectual property rights is granted herein.
PCI-SIG is a trademark of PCI-SIG.
All other product names are trademarks, registered trademarks, or servicemarks of their respective
owners.
Copyright © 1997, 2001, PCI-SIG
Revision 1.1
3
Contents
Chapter 1 Introduction
1.1 Objectives of the PCI Hot-Plug Specification..................................................................... 7
1.2 Areas of Standardization ..................................................................................................... 8
1.3 Reference Documents.......................................................................................................... 9
1.4 Notational Conventions....................................................................................................... 9
1.5 Definitions of Terms ......................................................................................................... 10
1.6 Assumptions ...................................................................................................................... 12
1.6.1 PCI Add-in Card Failure ............................................................................................ 12
1.6.2 Orderly Removal and Insertion .................................................................................. 12
1.6.3 Programmatic Access to the Hot-Plug Service .......................................................... 13
1.7 Standard Hot-Plug Controller............................................................................................ 13
Chapter 2 Overview of PCI Hot Plug
2.1 System Components.......................................................................................................... 15
2.2 Illustration of a Hot-Plug Sequence .................................................................................. 16
2.2.1 Hot Removal............................................................................................................... 16
2.2.2 Hot Insertion............................................................................................................... 17
Chapter 3 Hardware and Firmware Requirements
3.1 Platform Requirements...................................................................................................... 19
3.1.1 Supplementary Hardware Requirements.................................................................... 19
3.1.2 Platform Initialization.................................................................................................22
3.1.3 Turning On a Slot .......................................................................................................22
3.1.4 Turning Off a Slot ......................................................................................................23
3.2 Add-in-Card Requirements ............................................................................................... 23
3.2.1 Noteworthy Requirements of the PCI Local Bus Specification and the PCI-X
Addendum ............................................................................................................................. 23
3.2.2 Remote Power Sources............................................................................................... 26
3.2.3 Multiple-Card Sets......................................................................................................26
3.3 Slot Power Requirements .................................................................................................. 26
3.4 Bus Mode and Frequency Considerations......................................................................... 28
Revision 1.1
4
Chapter 4 Software Requirements
4.1 System Software................................................................................................................ 29
4.1.1 Items Specified by the Operating-System Vendor..................................................... 29
4.1.2 Quiescing Add-in Card Activity................................................................................. 30
4.1.3 Initializing the Configuration Space Header.............................................................. 31
4.1.4 Add-in Card Option ROMs ........................................................................................ 32
4.1.5 Add-in Card Driver Requirements ............................................................................. 32
4.1.6 Attention Indicator...................................................................................................... 32
4.1.7 Hot-Plug Service......................................................................................................... 33
4.1.8 Slot Identification....................................................................................................... 33
4.2 Platform-Specific Software............................................................................................... 34
4.2.1 Hot-Plug System Driver ............................................................................................. 34
4.2.2 Hot-Plug Primitives.................................................................................................... 34
4.2.2.1 Querying the Hot-Plug System Driver ................................................................ 35
4.2.2.2 Setting Slot Status................................................................................................ 36
4.2.2.3 Querying Slot Status............................................................................................ 37
4.2.2.4 Asynchronous Notification of Slot Status Change.............................................. 38
Appendix A Presence and Capability Signals
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