Offset 178h PREFCTRL-Prefetch Control Register, RsvdP | Intel 41210

Register Description

12.2.66Offset 178h: PREFCTRL—Prefetch Control Register

The following register contains prefetch parameters for PCI operation.

Table 100.		Offset 178h: PREFCTRL—Prefetch Control Register

Bits		Type	Reset			Description

63:60		RsvdP	0000b	Preserved

				Prefetch Policy (PP): These bits control how the bridge prefetches data on behalf of PCI
				masters:
				•	00 =	Allow prefetching on MRM, MRL, and MR.
55:54		RW	01b	•	01 =	Allow prefetching on MRM and MRL, but not on memory read.
				•	1x =	Disable all prefetching.
				NOTE: This control applies to both inbound memory reads and peer reads to the other PCI
					segment in the Intel® 41210 Serial to Parallel PCI Bridge.
53:22		RsvdP	0	Preserved

21:16		RW	05h	TH 66: These bits indicate the threshold parameter for 66 MHz PCI. Unit is 64B chunks and
21:16		RW	05h	is 0s based; in other words, a value of 0 in this field indicates 64B.


15:11		RsvdP	00h	Preserved

10:5		RW	03h	TH 33: These bits indicate the threshold parameter for 33 MHz PCI. Unit is 64B chunks and
10:5		RW	03h	is 0s based; in other words, a value of 0 in this field indicates 64B.


4:0		RsvdP	00h	Preserved

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

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Image 119

Intel 41210 manual Offset 178h PREFCTRL-Prefetch Control Register, RsvdP

Contents

Developer’s Manual Intel 41210 Serial to Parallel PCI Bridge 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 Date Revision Description Revision History Introduction1 PCI Express* Interface FeaturesPCI-X Interface Features Jtag Power ManagementSMBus Interface On-Die Termination ODT Signal Description AGNT#50 BGNT#50 ODT SignalsAACK64# BACK64# AAD6332 BAD6332 ACBE#74 BCBE#74 ADEVSEL# BDEVSEL# AFRAME# BFRAME# Total PCI Express* Interface PinsPCI Express* Interface PERCOMP10 AIRDY# 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 Pins Number Description Voltage Pins This page Intentionally Left Blank PCI-X Initialization Pattern PCI Mode Pin/Strap EncodingPCI-X Interface Initialization Transaction Encoding1 PCI ModeTransactions Supported PCI Transactions Supported PCI-X Transactions Supported PCI-X ModeRead Transactions Delayed Configuration Transactions PCI Lock CyclesEnd Point Source Transaction Termination Decoding PCI-X Interface PCI-X Mode Transaction Termination PCI-X Interface Wait States PCI-X Protocol SpecificsAttributes 2 4 GB and 4 K Page Crossover Split Completion Abort Registers ArbitrationSplit Transactions Fields BridgeM0 High Priority Group Lpg Low Priority B3173-01 Internal Arbitration Scheme PCI Bus Power Management Power ManagementHardware-Controlled Active State Power Management Software-Driven PCI-PM 1.1-Compatible Power Management Power-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 Space Secondary PCI Devices Configuration-Space AccessPCI Express* Configuration Access Device Number Signal Used for Public/Private Addressing Type 1 to Type 0 Translation PCI and PCI-X Type 0 Configuration Access from PCI-X Interface SMBus Configuration Access I/O Space Access Mechanism O Forwarding Memory Space Access Mechanism Memory Forwarding Memory-Mapped I/O Window Opaque Memory Window VGA AddressingPrefetchable Memory Window § § Row Pass Column Transaction OrderingUpstream Transaction Ordering Upstream Transaction Ordering Downstream 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 on Bit Value System Management Bus InterfaceSMBus Address Assignments SMBus command SMBus CommandsSMBus Command Encoding Internal Command SMBus 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 Clocking PCI 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 Terminations Successful 00h PCI-X Split Termination Message PCI ExpressIndex PCI Express* Completion Status PCI Completion Split Termination on PCI Express* Interface Bit Attribute Definitions Register Nomenclature and Access AttributesPERST# reset Register Description Configuration Registers B3174-02 PCI/PCI-X Compatible Configuration regionCapptr 0xFFF 0x300 0x100 0x40 0x00 Legacy 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 Description Type Offset 04h PCICMD-Command Register Sheet 2Offset 06h PSTS-Primary Device Status Offset 06h PSTS-Primary Device Status Sheet 1 Bits Offset 08h REVID-Revision IDOffset 06h PSTS-Primary Device Status Sheet 2 Offset 08h REVID-Revision ID Offset 0Eh HEADTYP-Header Type Offset 0Dh PMLT-Primary Master Latency TimerOffset 09h CC-Class Code Offset 0Ch CLS-Cache-Line Size Offset 18h BNUM-Bus Numbers Offset 1Bh SMLT-Secondary Master Latency TimerOffset 1Bh SMLT-Secondary Master Latency Timer Offset 18h BNUM-Bus Numbers Support for 16-bit I/O addressing only Offset 1Ch IOBL-I/O Base and LimitOffset 1Ch IOBL-I/O Base and Limit FFFh Offset 1Eh SSTS-Secondary Status Offset 1Eh SSTS-Secondary Status Must be less than this value Offset 20h MBL-Memory Base and LimitOffset 20h MBL-Memory Base and Limit 3120 000h Offset 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 Bits Offset 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 Pointer Offset 3Eh BCTRL-Bridge Control Sheet 1 Offset 3Eh BCTRL-Bridge Control Offset 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 Pmre Offset 45h EXPNXTP-Next Item Pointer Offset 42h MTT-Multi-Transaction TimerOffset 43h PCLKC-PCI Clock Control Offset 44h EXPCAPID-PCI Express* Capability Identifier Offset 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 Register Offset 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 Address Offset 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 Pointer Offset 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 Identifier Offset DAh PXSSTS-PCI-X Secondary Status Offset DAh PXSSTS-PCI-X Secondary Status Offset 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 Status Offset E4h PXDSTC-PCI-X Downstream Split Transaction Control Offset FCh BINIT-Bridge Initialization Register Offset FCh BINIT-Bridge Initialization Register When 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 Capability Offset 108h ERRUNCMSK-PCI Express* Uncorrectable Error Mask Offset 108h ERRUNCMSK-PCI Express* Uncorrectable Error Mask Training Error Severity Not supported Unsupported Request Error Status SeverityFlow Control Protocol Error Status Severity Data Link Protocol Error Severity 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 1270 Offset 11C-12Bh HDRLOG-PCI Express* Transaction Header LogOffset 11C-12Bh HDRLOG-PCI Express* Transaction Header Log Sheet 1 Logs the header Sheet 2 PCI-X Uncorrectable Attribute Parity Error Detected Mask Internal Bridge Data Error MaskPCI Delayed Transaction Timer Expiry Mask PCI-X Uncorrectable Address Parity Error Detected Mask PCI-X Detected Split Completion Master Abort Mask PCI-X Detected Target Abort Mask optional in specification PCI-X Uncorrectable Data Parity Error Detected Severity Internal Bridge Data Error SeverityPCI Delayed Transaction Timer Expiry Severity PCI-X Uncorrectable Address Parity Error Detected Severity Register 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 Log SMBUS5 SMBUS3 SMBUS2 SMBUS1 Offset 170h SSR-Strap Status RegisterOffset 170h SSR-Strap Status Register Reserved Read only 6360 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