Intel 41210 Arbitration, Split Transactions, Fields, Split Completion Abort Registers, Message

Page 35

PCI-X Interface

3.3.4Split Transactions

 

• Completer attributes are given in Table 17.

 

Table 17.

Intel® 41210 Serial to Parallel PCI Bridge Implementation of Completer Attribute

 

Fields

 

 

 

 

 

Attribute

Function

 

 

 

 

Byte Count Modified (BCM)

The 41210 does not set this bit.

 

 

 

 

 

The 41210 sets this bit only in the following

 

 

circumstances:

 

Split Completion Error (SCE)

• when a memory read command from PCI-X

 

master is target aborted on PCI Express*

 

 

 

 

• when the 41210 does a queue discard operation

 

 

of upstream queues

 

 

 

 

Split Completion Message (SCM)

This bit shadows the SCE bit.

 

 

 

•Unexpected Split Completions

The 41210 asserts DEVSEL# and discards the data when the Requester ID matches the bridge but the tag does not match that of any outstanding requests (0 or 1) from this device.

•Split Completion Messages

The 41210 can generate error messages only for cycles that cross the bridge that master- or target-abort. At this point, Dword cycles cross the bridge that requires completion (in other words, I/O cycles). Therefore, the 41210 can generate only a “PCI-X Bridge Error” completion message for the memory read commands, as indicated in Table 18.

Table 18.

Split Completion Abort Registers

 

 

 

 

Index

Message

 

 

 

 

00h

Master-Abort:The 41210 encountered a Master-Abort on the destination bus.

 

 

 

 

01h

Target-Abort:The 41210 encountered a Master-Abort on the destination bus

 

 

 

3.4Arbitration

The 41210 supports a high-performance internal PCI arbiter that supports up to five external masters on each PCI segment. The request inputs into the internal arbiter include five external request inputs and one internal request input. All request inputs to the internal arbiter are split into two groups: a high priority group and a low priority group. Any master, including the internal master, can be programmed to be in either of the two groups. The request inputs into the arbiter can be in one single group. Within a group, priority is round-robin. The entire low-priority group represents one slot in the high-priority group. The 41210 provides a 16-bit arbiter control register to control two aspects of the internal arbiter behavior:

•Priority group for a master (in other words, whether a master is in the low-priority group or the high-priority group)

•Bus parking on last PCI agent or the bridge

Intel® 41210 Serial to Parallel PCI Bridge Developer’s Manual

35

Page 34 Page 36
Image 35
Page 34 Page 36
Contents Developer’s Manual Intel 41210 Serial to Parallel PCI BridgeIntel 41210 Serial to Parallel PCI Bridge Developer’s Manual Contents 10.1 12.2.6 Figures Tables 118 Offset 178h PREFCTRL-Prefetch Control Register Date Revision Description Revision HistoryIntroduction1 PCI Express* Interface FeaturesPCI-X Interface Features Jtag Power ManagementSMBus Interface On-Die Termination ODT Signal DescriptionAGNT#50 BGNT#50 ODT SignalsAACK64# BACK64# AAD6332 BAD6332 ACBE#74 BCBE#74 ADEVSEL# BDEVSEL# AFRAME# BFRAME#Total PCI Express* Interface PinsPCI Express* Interface PERCOMP10AIRDY# PCI Interface Pins Sheet 1PCI Bus Interface Two Instances ADEVSEL#PCI Interface Pins Sheet 2 PCI Bus Interface 64-Bit Extension Two Interfaces PCI Interface Pins 64-Bit ExtensionsPCI Clock and Reset Pins AINTC# AINTD# Interrupt Interface PinsInterrupt Interface Two Interfaces AINTA# AINTB#Cfgretry Reset StrapsReset Strap Pins SMBus Interface Pins Miscellaneous Pins Miscellaneous PinsNumber Description Voltage PinsThis page Intentionally Left Blank PCI-X Initialization Pattern PCI Mode Pin/Strap EncodingPCI-X Interface InitializationTransaction Encoding1 PCI ModeTransactions Supported PCI Transactions SupportedPCI-X Transactions Supported PCI-X ModeRead Transactions Delayed Configuration TransactionsPCI Lock CyclesEnd Point Source Transaction Termination DecodingPCI-X Interface PCI-X Mode Transaction Termination PCI-X Interface Wait States PCI-X Protocol SpecificsAttributes 2 4 GB and 4 K Page CrossoverSplit Completion Abort Registers ArbitrationSplit Transactions FieldsBridgeM0 High Priority Group Lpg Low Priority B3173-01 Internal Arbitration SchemePCI Bus Power Management Power ManagementHardware-Controlled Active State Power Management Software-Driven PCI-PM 1.1-Compatible Power ManagementPower-Management Event Signaling Pmetoack This page Intentionally Left Blank Addressing5 Addressable Space AccessPCI-to-PCI Bridge a Configuration Space PCI-to-PCI Bridge B Configuration SpaceSecondary PCI Devices Configuration-Space AccessPCI Express* Configuration Access Device Number Signal Used for Public/PrivateAddressing Type 1 to Type 0 Translation PCI and PCI-X Type 0 Configuration Access from PCI-X InterfaceSMBus Configuration Access I/O Space Access MechanismO Forwarding Memory Space Access Mechanism Memory Forwarding Memory-Mapped I/O WindowOpaque Memory Window VGA AddressingPrefetchable Memory Window § § Row Pass Column Transaction OrderingUpstream Transaction Ordering Upstream Transaction OrderingDownstream Transaction Ordering Downstream Transaction OrderingRelaxed Ordering/No-Snoop Support INTx Routing Table Interrupt SupportLegacy Interrupt Sharing Secondary Bus Interrupt Routing for Devices behind a BridgeInterrupt Binding for Devices behind a Bridge Device Number onBit Value System Management Bus InterfaceSMBus Address Assignments SMBus command SMBus CommandsSMBus Command Encoding Internal CommandSMBus Status Byte Encoding ConfigurationInitialization Sequence Clock Stretch Clock Stretch Configuration Writes Error Handling SMBus Interface Reset Local Initialization This page Intentionally Left Blank Clock Domains Clock and ResetDevice Reset ClockingPCI Express* Reset Mechanism PERST# Reset MechanismRSTIN# Reset Mechanism Software PCI Reset SBR-Secondary Bus Reset This page Intentionally Left Blank PCI Errors Error HandlingPCI Express* Errors PCI-X Termination PCI Express* Completion Error TypesTermination of Completion Required Transactions Completion-Status Translation for Immediate TerminationsSuccessful 00h PCI-X Split Termination Message PCI ExpressIndex PCI Express* Completion Status PCI Completion Split Termination on PCI Express* InterfaceBit Attribute Definitions Register Nomenclature and Access AttributesPERST# reset Register DescriptionConfiguration Registers B3174-02 PCI/PCI-X Compatible Configuration regionCapptr 0xFFF 0x300 0x100 0x40 0x00Legacy Configuration Space Byte Offset PCI Express* Extended Configuration SpaceRegister Offset 00h ID-Identifiers Offset 04h PCICMD-Command RegisterOffset 04h PCICMD-Command Register Sheet 1 Reset DescriptionType Offset 04h PCICMD-Command Register Sheet 2Offset 06h PSTS-Primary Device Status Offset 06h PSTS-Primary Device Status Sheet 1Bits Offset 08h REVID-Revision IDOffset 06h PSTS-Primary Device Status Sheet 2 Offset 08h REVID-Revision IDOffset 0Eh HEADTYP-Header Type Offset 0Dh PMLT-Primary Master Latency TimerOffset 09h CC-Class Code Offset 0Ch CLS-Cache-Line SizeOffset 18h BNUM-Bus Numbers Offset 1Bh SMLT-Secondary Master Latency TimerOffset 1Bh SMLT-Secondary Master Latency Timer Offset 18h BNUM-Bus NumbersSupport for 16-bit I/O addressing only Offset 1Ch IOBL-I/O Base and LimitOffset 1Ch IOBL-I/O Base and Limit FFFhOffset 1Eh SSTS-Secondary Status Offset 1Eh SSTS-Secondary StatusMust be less than this value Offset 20h MBL-Memory Base and LimitOffset 20h MBL-Memory Base and Limit 3120 000hOffset 24h PMBL-Prefetchable Memory Base and Limit Bits Type Reset DescriptionOffset 24h PMBL-Prefetchable Memory Base and Limit Offset 28h PMBU32-Prefetchable Memory Base Upper 32 BitsOffset 3Ch INTR-Interrupt Information Offset 2Ch PMLU32-Prefetchable Memory Limit Upper 32 BitsOffset 30h IOBLU16-I/O Base and Limit Upper 16 Bits Offset 34h CAPP-Capabilities List PointerOffset 3Eh BCTRL-Bridge Control Sheet 1 Offset 3Eh BCTRL-Bridge ControlOffset 3Eh BCTRL-Bridge Control Sheet 2 Bit Maximum Number of Upstream Delayed Transactions Offset 40h BCNF-Bridge Configuration RegisterOffset 40h BCNF-Bridge Configuration Register Peer Memory Read Enable PmreOffset 45h EXPNXTP-Next Item Pointer Offset 42h MTT-Multi-Transaction TimerOffset 43h PCLKC-PCI Clock Control Offset 44h EXPCAPID-PCI Express* Capability IdentifierOffset 46h EXPCAP-PCI Express* Capability Default DescriptionOffset 46h EXPCAP-PCI Express* Capability Bit MaxPayloadSize Offset 4Ch EXPDCTL-PCI Express* Device Control RegisterBit MaxReadRequestSize Offset 4Eh EXPDSTS-PCI Express* Device Status Register Offset 4Eh EXPDSTS-PCI Express* Device Status RegisterOffset 50h EXPLCAP-PCI Express* Link Capabilities Register L0s Exit Latency Bits Type Default DescriptionOffset 54h EXPLCTL-PCI Express* Link Control Register Offset 54h EXPLCTL-PCI Express* Link Control RegisterOffset 5Dh MSINXTP-PCI Express* Next Item Pointer Offset 56h EXPLSTS-PCI Express* Link Status RegisterOffset 5Ch MSICAPID-PCI Express* MSI Capability Identifier Offset 68h MSIMD-PCI Express* MSI Message Data Offset 6Ch PMCAPID-Power Management Capabilities IdentifierOffset 5Eh MSIMC-PCI Express* MSI Message Control Offset 60h MSIMA-PCI Express* MSI Message AddressOffset 6Eh PMPMC-Power Management Capabilities Offset 6Dh PMNXTP-Power Management Next Item PointerOffset 6Eh PMPMC-Power Management Capabilities Offset 6Dh PMNXTP-Power Management Next Item PointerOffset 73h PMDATA-Power Management Data Field Offset 70h PMPMCSR-Power Management Control/Status RegisterOffset 72h PMBSE-Power Management Bridge Support Extensions Offset D9h PXNXTP-PCI-X Next Item Pointer Offset D8h PXCAPID-PCI-X Capabilities IdentifierOffset D9h PXNXTP-PCI-X Next Item Pointer Offset D8h PXCAPID-PCI-X Capabilities IdentifierOffset DAh PXSSTS-PCI-X Secondary Status Offset DAh PXSSTS-PCI-X Secondary StatusOffset E0h PXUSTC-PCI-X Upstream Split Transaction Control Offset DCh PXBSTS-PCI-X Bridge StatusOffset E0h PXUSTC-PCI-X Upstream Split Transaction Control Offset DCh PXBSTS-PCI-X Bridge StatusOffset E4h PXDSTC-PCI-X Downstream Split Transaction Control Offset FCh BINIT-Bridge Initialization Register Offset FCh BINIT-Bridge Initialization RegisterWhen the configuration unit signals a completer abort Power Budgeting Capability as the next capabilityAdvanced Error Reporting Extended Capability Version Number ID, indicating Advanced Error Reporting CapabilityOffset 108h ERRUNCMSK-PCI Express* Uncorrectable Error Mask Offset 108h ERRUNCMSK-PCI Express* Uncorrectable Error MaskTraining Error Severity Not supported Unsupported Request Error Status SeverityFlow Control Protocol Error Status Severity Data Link Protocol Error SeverityOffset 110h ERRCORSTS-PCI Express* Correctable Error Status Offset 110h ERRCORSTS-PCI Express* Correctable Error StatusOffset 114h ERRCORMSK-PCI Express* Correctable Error Mask Offset 114h ERRCORMSK-PCI Express* Correctable Error Mask1270 Offset 11C-12Bh HDRLOG-PCI Express* Transaction Header LogOffset 11C-12Bh HDRLOG-PCI Express* Transaction Header Log Sheet 1 Logs the header Sheet 2PCI-X Uncorrectable Attribute Parity Error Detected Mask Internal Bridge Data Error MaskPCI Delayed Transaction Timer Expiry Mask PCI-X Uncorrectable Address Parity Error Detected MaskPCI-X Detected Split Completion Master Abort Mask PCI-X Detected Target Abort Mask optional in specificationPCI-X Uncorrectable Data Parity Error Detected Severity Internal Bridge Data Error SeverityPCI Delayed Transaction Timer Expiry Severity PCI-X Uncorrectable Address Parity Error Detected SeverityRegister is cleared by the software writing a 1 to the bit Rwcs = Errnonfatal = ErrfatalPCI-X Detected Split Completion Master Abort Severity Offset 16Ah ARBCNTRL-Internal Arbiter Control Register Type Reset DescriptionOffset 16Ah ARBCNTRL-Internal Arbiter Control Register Offset 13C-14Bh PCIXHDRLOG-Uncorrectable PCI-X Header LogSMBUS5 SMBUS3 SMBUS2 SMBUS1 Offset 170h SSR-Strap Status RegisterOffset 170h SSR-Strap Status Register Reserved Read only6360 RsvdP Offset 178h PREFCTRL-Prefetch Control RegisterOffset 178h PREFCTRL-Prefetch Control Register Offset 308h PWRBGTDATA-Power Budgeting Data Register Offset 304h PWRBGTDSEL-Power Budgeting Data Select RegisterOffset 308h PWRBGTDATA-Power Budgeting Data Register Offset 304h PWRBGTDSEL-Power Budgeting Data Select Register
Related manuals
Manual 64 pages 47.45 Kb
Top Page Image Contents