Offset 56h EXPLSTS-PCI Express* Link Status Register | Intel 41210

Register Description

12.2.32Offset 56h: EXP_LSTS—PCI Express* Link Status Register

Table 66.		Offset 56h: EXP_LSTS—PCI Express* Link Status Register

Bits		Type	Default				Description

15:13		RsvdZ	000b	Reserved Zero: Software must always write 0 to these bits.

				Slot Clock Configuration: When the Intel® 41210 Serial to Parallel PCI Bridge is on a PCI
				Express* connector, this bit indicates whether it is using the same reference clock that is
12		RO	1b	provided at the connector.
12		RO	1b	0 = Indicates independent reference clock
				0 = Indicates independent reference clock
				1 = Indicates same reference clock.

11		RO	0b	Link Training: Not applicable

10		RO	0b	Link Width Negotiation Error: Not applicable

				Negotiated Link Width: This field indicates the negotiated width of the PCI Express* link.
				•	00	0001b	X1
			Set by PCI	•	00	0010b	X2—not supported
			Express*	•	00	0100b	X4
9:4		RO	Link Layer	•	00	1000b	X8
9:4		RO	after	•	00	1000b	X8
			after	•	00	1100b	X12—not supported
			training is	•	00	1100b	X12—not supported
			complete	•	01	0000b	X16—not supported
				•	10	0000b	X32—not supported
				• All other values are reserved.

3:0		RO	1h	Link Speed: The only speed supported is 2.5 Gbps.

12.2.33Offset 5Ch: MSI_CAPID—PCI Express* MSI Capability Identifier

Note: MSI generation is used for internal debugging purposes and does not occur in normal operation.

Table 67. Offset 5Ch: MSI_CAPID—PCI Express* MSI Capability Identifier

Bits	Type	Reset	Description

7:0	RO	05h	Capability ID (MCID): Capabilities ID indicates MSI.

12.2.34Offset 5Dh: MSI_NXTP—PCI Express* Next Item Pointer

Table 68.		Offset 5Dh: MSI_NXTP—PCI Express* Next Item Pointer

Bits		Type	Reset	Description

7:0		RO	6Ch	Next Pointer (MNPTR): This field points to the next capabilities list pointer, which is the PCI
7:0		RO	6Ch	Express* Power Management capability item.
				Express* Power Management capability item.

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

Image 96

Intel 41210 manual Offset 56h EXPLSTS-PCI Express* Link Status Register, Offset 5Dh MSINXTP-PCI Express* Next Item Pointer

Contents

Intel 41210 Serial to Parallel PCI Bridge Developer’s Manual Intel 41210 Serial to Parallel PCI Bridge Developer’s Manual Contents 10.1 12.2.6 Figures Tables 118 Offset 178h PREFCTRL-Prefetch Control Register Revision History Date Revision Description PCI Express* Interface Features PCI-X Interface FeaturesIntroduction1 Power Management SMBus InterfaceJtag Signal Description On-Die Termination ODT ODT Signals AACK64# BACK64# AAD6332 BAD6332 ACBE#74 BCBE#74ADEVSEL# BDEVSEL# AFRAME# BFRAME# AGNT#50 BGNT#50 PCI Express* Interface Pins PCI Express* InterfacePERCOMP10 Total PCI Interface Pins Sheet 1 PCI Bus Interface Two InstancesADEVSEL# AIRDY# PCI Interface Pins Sheet 2 PCI Interface Pins 64-Bit Extensions PCI Clock and Reset PinsPCI Bus Interface 64-Bit Extension Two Interfaces Interrupt Interface Pins Interrupt Interface Two InterfacesAINTA# AINTB# AINTC# AINTD# Reset Straps Reset Strap PinsCfgretry SMBus Interface Pins Miscellaneous Pins Miscellaneous Pins Voltage Pins Number Description This page Intentionally Left Blank PCI Mode Pin/Strap Encoding PCI-X InterfaceInitialization PCI-X Initialization Pattern PCI Mode Transactions SupportedPCI Transactions Supported Transaction Encoding1 PCI-X Mode Read TransactionsPCI-X Transactions Supported Configuration Transactions Delayed Lock Cycles End Point SourcePCI Decoding Transaction Termination PCI-X Interface PCI-X Mode Transaction Termination PCI-X Interface PCI-X Protocol Specifics Attributes2 4 GB and 4 K Page Crossover Wait States Arbitration Split TransactionsFields Split Completion Abort Registers Internal Arbitration Scheme BridgeM0 High Priority Group Lpg Low Priority B3173-01 Power Management Hardware-Controlled Active State Power ManagementSoftware-Driven PCI-PM 1.1-Compatible Power Management PCI Bus Power Management Power-Management Event Signaling Pmetoack This page Intentionally Left Blank Addressable Space Access PCI-to-PCI Bridge a Configuration SpacePCI-to-PCI Bridge B Configuration Space Addressing5 Configuration-Space Access PCI Express* Configuration AccessDevice Number Signal Used for Public/Private Secondary PCI Devices Addressing Type 0 Configuration Access from PCI-X Interface Type 1 to Type 0 Translation PCI and PCI-X I/O Space Access Mechanism SMBus Configuration Access O Forwarding Memory Space Access Mechanism Memory-Mapped I/O Window Memory Forwarding VGA Addressing Prefetchable Memory WindowOpaque Memory Window § § Transaction Ordering Upstream Transaction OrderingUpstream Transaction Ordering Row Pass Column Downstream Transaction Ordering Relaxed Ordering/No-Snoop SupportDownstream Transaction Ordering Interrupt Support Legacy Interrupt SharingINTx Routing Table Interrupt Routing for Devices behind a Bridge Interrupt Binding for Devices behind a BridgeDevice Number on Secondary Bus System Management Bus Interface SMBus Address AssignmentsBit Value SMBus Commands SMBus Command EncodingInternal Command SMBus command Configuration Initialization SequenceSMBus Status Byte Encoding Clock Stretch Clock Stretch Configuration Writes Error Handling SMBus Interface Reset Local Initialization This page Intentionally Left Blank Clock and Reset Device ResetClocking Clock Domains PERST# Reset Mechanism RSTIN# Reset MechanismPCI Express* Reset Mechanism Software PCI Reset SBR-Secondary Bus Reset This page Intentionally Left Blank Error Handling PCI Express* ErrorsPCI Errors Error Types Termination of Completion Required TransactionsCompletion-Status Translation for Immediate Terminations PCI-X Termination PCI Express* Completion PCI-X Split Termination Message PCI Express IndexSuccessful 00h Split Termination on PCI Express* Interface PCI Express* Completion Status PCI Completion Register Nomenclature and Access Attributes PERST# resetRegister Description Bit Attribute Definitions Configuration Registers PCI/PCI-X Compatible Configuration region Capptr0xFFF 0x300 0x100 0x40 0x00 B3174-02 Legacy Configuration Space PCI Express* Extended Configuration Space RegisterByte Offset Offset 04h PCICMD-Command Register Offset 04h PCICMD-Command Register Sheet 1Reset Description Offset 00h ID-Identifiers Offset 04h PCICMD-Command Register Sheet 2 Offset 06h PSTS-Primary Device StatusOffset 06h PSTS-Primary Device Status Sheet 1 Type Offset 08h REVID-Revision ID Offset 06h PSTS-Primary Device Status Sheet 2Offset 08h REVID-Revision ID Bits Offset 0Dh PMLT-Primary Master Latency Timer Offset 09h CC-Class CodeOffset 0Ch CLS-Cache-Line Size Offset 0Eh HEADTYP-Header Type Offset 1Bh SMLT-Secondary Master Latency Timer Offset 1Bh SMLT-Secondary Master Latency TimerOffset 18h BNUM-Bus Numbers Offset 18h BNUM-Bus Numbers Offset 1Ch IOBL-I/O Base and Limit Offset 1Ch IOBL-I/O Base and LimitFFFh Support for 16-bit I/O addressing only Offset 1Eh SSTS-Secondary Status Offset 1Eh SSTS-Secondary Status Offset 20h MBL-Memory Base and Limit Offset 20h MBL-Memory Base and Limit3120 000h Must be less than this value Bits Type Reset Description Offset 24h PMBL-Prefetchable Memory Base and LimitOffset 28h PMBU32-Prefetchable Memory Base Upper 32 Bits Offset 24h PMBL-Prefetchable Memory Base and Limit Offset 2Ch PMLU32-Prefetchable Memory Limit Upper 32 Bits Offset 30h IOBLU16-I/O Base and Limit Upper 16 BitsOffset 34h CAPP-Capabilities List Pointer Offset 3Ch INTR-Interrupt Information Offset 3Eh BCTRL-Bridge Control Offset 3Eh BCTRL-Bridge Control Sheet 1 Offset 3Eh BCTRL-Bridge Control Sheet 2 Offset 40h BCNF-Bridge Configuration Register Offset 40h BCNF-Bridge Configuration RegisterPeer Memory Read Enable Pmre Bit Maximum Number of Upstream Delayed Transactions Offset 42h MTT-Multi-Transaction Timer Offset 43h PCLKC-PCI Clock ControlOffset 44h EXPCAPID-PCI Express* Capability Identifier Offset 45h EXPNXTP-Next Item Pointer Default Description Offset 46h EXPCAP-PCI Express* CapabilityOffset 46h EXPCAP-PCI Express* Capability Offset 4Ch EXPDCTL-PCI Express* Device Control Register Bit MaxReadRequestSizeBit MaxPayloadSize Offset 4Eh EXPDSTS-PCI Express* Device Status Register Offset 50h EXPLCAP-PCI Express* Link Capabilities RegisterOffset 4Eh EXPDSTS-PCI Express* Device Status Register Bits Type Default Description Offset 54h EXPLCTL-PCI Express* Link Control RegisterOffset 54h EXPLCTL-PCI Express* Link Control Register L0s Exit Latency Offset 56h EXPLSTS-PCI Express* Link Status Register Offset 5Ch MSICAPID-PCI Express* MSI Capability IdentifierOffset 5Dh MSINXTP-PCI Express* Next Item Pointer Offset 6Ch PMCAPID-Power Management Capabilities Identifier Offset 5Eh MSIMC-PCI Express* MSI Message ControlOffset 60h MSIMA-PCI Express* MSI Message Address Offset 68h MSIMD-PCI Express* MSI Message Data Offset 6Dh PMNXTP-Power Management Next Item Pointer Offset 6Eh PMPMC-Power Management CapabilitiesOffset 6Dh PMNXTP-Power Management Next Item Pointer Offset 6Eh PMPMC-Power Management Capabilities Offset 70h PMPMCSR-Power Management Control/Status Register Offset 72h PMBSE-Power Management Bridge Support ExtensionsOffset 73h PMDATA-Power Management Data Field Offset D8h PXCAPID-PCI-X Capabilities Identifier Offset D9h PXNXTP-PCI-X Next Item PointerOffset D8h PXCAPID-PCI-X Capabilities Identifier Offset D9h PXNXTP-PCI-X Next Item Pointer Offset DAh PXSSTS-PCI-X Secondary Status Offset DAh PXSSTS-PCI-X Secondary Status Offset DCh PXBSTS-PCI-X Bridge Status Offset E0h PXUSTC-PCI-X Upstream Split Transaction ControlOffset DCh PXBSTS-PCI-X Bridge Status Offset E0h PXUSTC-PCI-X Upstream Split Transaction Control Offset E4h PXDSTC-PCI-X Downstream Split Transaction Control Offset FCh BINIT-Bridge Initialization Register Offset FCh BINIT-Bridge Initialization Register Power Budgeting Capability as the next capability Advanced Error Reporting Extended Capability Version NumberID, indicating Advanced Error Reporting Capability When the configuration unit signals a completer abort Offset 108h ERRUNCMSK-PCI Express* Uncorrectable Error Mask Offset 108h ERRUNCMSK-PCI Express* Uncorrectable Error Mask Unsupported Request Error Status Severity Flow Control Protocol Error Status SeverityData Link Protocol Error Severity Training Error Severity Not supported Offset 110h ERRCORSTS-PCI Express* Correctable Error Status Offset 110h ERRCORSTS-PCI Express* Correctable Error Status Offset 114h ERRCORMSK-PCI Express* Correctable Error Mask Offset 114h ERRCORMSK-PCI Express* Correctable Error Mask Offset 11C-12Bh HDRLOG-PCI Express* Transaction Header Log Offset 11C-12Bh HDRLOG-PCI Express* Transaction Header Log1270 Sheet 1 Sheet 2 Logs the header Internal Bridge Data Error Mask PCI Delayed Transaction Timer Expiry MaskPCI-X Uncorrectable Address Parity Error Detected Mask PCI-X Uncorrectable Attribute Parity Error Detected Mask PCI-X Detected Target Abort Mask optional in specification PCI-X Detected Split Completion Master Abort Mask Internal Bridge Data Error Severity PCI Delayed Transaction Timer Expiry SeverityPCI-X Uncorrectable Address Parity Error Detected Severity PCI-X Uncorrectable Data Parity Error Detected Severity Rwcs = Errnonfatal = Errfatal PCI-X Detected Split Completion Master Abort SeverityRegister is cleared by the software writing a 1 to the bit Type Reset Description Offset 16Ah ARBCNTRL-Internal Arbiter Control RegisterOffset 13C-14Bh PCIXHDRLOG-Uncorrectable PCI-X Header Log Offset 16Ah ARBCNTRL-Internal Arbiter Control Register Offset 170h SSR-Strap Status Register Offset 170h SSR-Strap Status RegisterReserved Read only SMBUS5 SMBUS3 SMBUS2 SMBUS1 Offset 178h PREFCTRL-Prefetch Control Register Offset 178h PREFCTRL-Prefetch Control Register6360 RsvdP Offset 304h PWRBGTDSEL-Power Budgeting Data Select Register Offset 308h PWRBGTDATA-Power Budgeting Data RegisterOffset 304h PWRBGTDSEL-Power Budgeting Data Select Register Offset 308h PWRBGTDATA-Power Budgeting Data Register