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Intel 21555 user manual Bar Summary, Bar Size Address Translation

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Address Decoding

4.621555 Bar Summary

Table 12 shows a summary of the 21555 BARs.

Table 12. Bar Summary

Bar	Size		Address Translation

Primary CSR and Downstream	4 KB to 2 GB		Low 4 KB: None
Memory 0	4 KB to 2 GB		Above 4KB boundary: Direct Offset
Memory 0			Above 4KB boundary: Direct Offset

Primary CSR I/O	256 bytes		—

Secondary CSR Memory	4 KB		—

Secondary CSR I/O	256 bytes		—

Primary Expansion ROM	4	KB to 16 MB	—

Downstream I/O or Memory 1	64 bytes to 256 bytes (I/O) or		Direct Offset
Downstream I/O or Memory 1	4	KB to 2 GB (memory)	Direct Offset
	4	KB to 2 GB (memory)

Downstream Memory 2	4	KB to 2 GB	Direct Offset

Downstream Memory 3	4	KB to 263 bytes	Direct Offset ( < 4 GB)
Downstream Memory 3	4	KB to 263 bytes	None (Š 4 GB)
			None (Š 4 GB)

Upstream I/O or Memory 0	64 bytes to 256 bytes (I/O) or		Direct Offset
Upstream I/O or Memory 0	4	KB to 2 GB (memory)	Direct Offset
	4	KB to 2 GB (memory)

Upstream Memory 1	4	KB to 2 GB	Direct Offset

Upstream Memory 2	64 KB to 16 MB		Lookup Table

21555 Non-Transparent PCI-to-PCI Bridge User Manual

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Intel 21555 user manual Bar Summary, Bar Size Address Translation

21555 specifications

The Intel 21555 is a prominent microprocessor developed by Intel, designed to cater to a variety of computing needs. This processor marks a significant step forward in Intel's lineup and underscores the company's commitment to advancing technology in personal computing, enterprise solutions, and beyond.

One of the standout features of the Intel 21555 is its advanced architecture. It utilizes a multi-core design, enabling improved performance through parallel processing. This architecture allows multiple applications to run seamlessly without a decline in speed. The cores are built on a cutting-edge manufacturing process that enhances energy efficiency while maintaining high clock speeds.

The Intel 21555 supports a wide range of technologies, including Intel Turbo Boost, which enables dynamic adjustments to the processor’s performance based on workload demands. This feature allows the processor to accelerate its speed during intensive tasks, providing users with a responsive experience when it matters the most.

Another key characteristic of the Intel 21555 is its support for integrated graphics. With Intel UHD Graphics technology, users can enjoy enhanced visuals for everyday tasks such as video playback, web browsing, and light gaming. This eliminates the need for a separate graphics card for many users, particularly in home office or light gaming scenarios.

Security is a significant focus in the design of the Intel 21555. It includes built-in hardware-based security features like Intel Trusted Execution Technology and Secure Boot. These features help protect against various types of threats, ensuring that user data remains secure from malicious attacks.

The Intel 21555 is also optimized for use with Intel's platform technologies, including Intel Optane memory and Intel Rapid Storage Technology. These technologies work together to deliver faster boot times and improved system responsiveness, making computing more efficient for users.

Furthermore, the Intel 21555 is designed to support virtualization technologies, allowing multiple operating systems to run concurrently without compromising performance. This is particularly useful for developers and businesses that rely on virtualization for testing and development environments.

In summary, the Intel 21555 is a powerful and versatile processor that reflects Intel's ongoing innovation in the computing space. With its multi-core architecture, enhanced graphics capabilities, strong security features, and advanced technologies, it stands out as an excellent choice for a wide range of applications, serving both casual users and professionals alike.

Contents

Non-Transparent PCI-to- PCI Bridge Page Contents With SROM, Local, and Host Processors 10.1 Tables Figures 131 148 108 Page Preface Brief description of the contents of this manual follows Term Words Bytes Bits Data UnitsNumbering STS Signal NomenclatureSignal Type Abbreviations Signal Description Type Register Abbreviations Access Type DescriptionRegister Abbreviations Comparing a 21555 to a Transparent PPB Introduction CPU PCI Dram PCI ROMCPU Feature PPB Feature Comparison Control Logic Architectural OverviewData Buffers Registers Microarchitecture Secondary Bus VGA Support Special ApplicationsProgramming Notes Primary Bus VGA Support Transaction Forwarding ROM AccessPage Group by Signal Pin Description See Signal DescriptionsSignal Pin Functional Groups Signal Name Type Description Primary PCI Bus Interface SignalsPrimary PCI Bus Interface Signals Sheet 1 Pstopl Primary PCI Bus Interface Signals Sheet 2Ppar Preql Pad6332 Primary PCI Bus Interface 64-Bit Extension SignalsPrimary PCI Bus Interface 64-Bit Extension Signals Sheet 1 Pack64l Pad6332 , pcbel74 , and ppar64 to valid logic levels Primary PCI Bus Interface 64-Bit Extension Signals Sheet 2Ppar64 Preq64l Secondary PCI Bus Interface Signals Sheet 1 Secondary PCI Bus Interface Signals Strdyl Secondary PCI Bus Interface Signals Sheet 2Spar Sstopl Scbel74 Secondary PCI Bus Interface 64-Bit Extension SignalsSack64l Sad6332 Miscellaneous Signals Miscellaneous SignalsPage Address Decoding Memory 0 Transaction Address Decoding CSR Address DecodingExpansion ROM Address Mapping Decoding BAR Setup Register Example Using the BAR Setup Registers Address Format Direct Address Translation Direct Offset Address Translation Lookup Table Based Address Translation Upstream Memory 2 Window Size Address Translation Using a Lookup Table Upstream Lookup Table Address Translation Lookup Table Entry Format Lookup Table Entry Format Forwarding of 64-Bit Address Memory Transactions Indirect I/O Transaction Generation I/O Transaction Address Decoding Address Decoding Subtractive Decoding of I/O Transactions Configuration AccessesType 0 Accesses to 21555 Configuration Space Initiation of Configuration Transactions by Address Decoding Bar Size Address Translation 21555 Bar SummaryBar Summary Page Transactions Overview PCI Bus Transactions Posted Write Transactions Memory Write and Invalidate Transactions Memory Write Transactions 3 64-bit Extension Posted Write Transaction Write Performance Tuning Options Write-Through Delayed Write Transactions Target Bus Response Initiator Bus Response Delayed Read TransactionsDelayed Write Transaction Target Termination Returns Nonprefetchable Reads Delayed Read Transaction Target Termination Returns Prefetchable Reads Prefetchable Read Transactions Using the 64-bit ExtensionRead Performance Features and Tuning Options Prefetch Boundaries Prefetching 64-Bit and 32-Bit Transactions Initiated by Read Queue Full Threshold Tuning Target Terminations Returned by Target Terminations Ordering Rules Transaction Termination Errors on the Target Bus Transaction Ordering Rules PCI Bus Transactions Page Initialization Requirements Power Management, Hot-Swap, and Reset SignalsPower Management, Hot-Swap, and Reset Signals Sheet 1 Srstinl Reset BehaviorPower Management, Hot-Swap, and Reset Signals Sheet 2 Spmel Prstl Reset Mechanisms 21555 Initialization Central Function During Reset Without Serial Preload With SROM, Local, and Host Processors Without Host Processor Power Management SupportWithout Local Processor Without Local Processor and Serial Preload 2 PME# Support Transitions Between Power Management StatesPower Management Actions Next Power State Action Overview of CompactPCI Controller Hardware Interface Power Management Data RegisterCompactPCI Hot-Swap Functionality Primary Lstat K Ω Insertion and Removal ProcessPrstl 332 Ω Initialization Requirements 4b Insertion W DisconnectedW Connected 2a INS ENUM# Initialization Requirements Clocking Primary and Secondary PCI Bus Clock SignalsPrimary and Secondary PCI Bus Clock Signals Sheet 1 Signal Name Description Sclko Primary and Secondary PCI Bus Clock Signals Sheet 221555 Secondary Clock Outputs Sclk 66 MHz Support Page Parallel ROM Interface Interface Signals Signal Type Description Name Prom Interface Signals Sheet 1 Prom Interface Signals Sheet 2 WE# OE# Prom Read by CSR AccessParallel and Serial ROM Connection 21555 Prom Read Timing Prom Write by CSR Access Prom Write Timing Prom Dword Read Read and Write Strobe Timing Access Time and Strobe Control Attaching Additional Devices to the ROM Interface Attaching Multiple Devices on the ROM Interface Sromsrom Preload Operation Srom Interface SignalsSrom Interface Signals Serial ROM Interface Srom Operation by CSR Access Srom Configuration Data Preload Format Serial ROM Interface Srom Write All Timing Diagram Srom Erase Timing Diagram Page Secondary PCI Bus Arbitration Signals Primary PCI Bus Arbitration SignalsSecondary PCI Bus Arbitration Signals Primary PCI Bus Arbitration Signals Secondary PCI Bus Arbitration Secondary Bus Arbitration Using the Internal ArbiterPrimary PCI Bus Arbitration Secondary Arbiter Example Bit Name Description Secondary Bus Arbitration Using an External ArbiterArbiter Control Register Interrupt Support Primary and Secondary PCI Bus Interrupt SignalsPrimary and Secondary PCI Bus Interrupt Signals Interrupt and Scratchpad Registers Interrupt and Scratchpad Registers Scratchpad Registers Doorbell InterruptsPage Primary PCI Bus Error Signals Error HandlingError Signals Primary PCI Bus Error Signals Secondary PCI Bus Error Signals Type PER † Action Taken Error Transaction Parity ErrorsParity Error Responses Sheet 1 Asserts pperrl Parity Error Responses Sheet 2Error Transaction Asserts sperrl Parity Error Responses Sheet 3 System Error SERR# Reporting Jtag Test Port Jtag SignalsJtag Signals Initialization Test Access Port Controller Inbound Message Passing I2O Support I2O Support Outbound Message Passing 116 117 Page Reading VPD Information VPD Support Writing VPD Information Theory of Operation Chapter Register Reference Information List of RegistersRegister Summary Register Cross Reference Table Register Name Preload Hex Access Configuration RegistersConfiguration Space Address Register Sheet 1 Byte Reset Value Write Read Configuration Space Address Register Sheet 2 Configuration Space Address Register Sheet 3 Configuration Space Address Register Sheet 4 CSR Address Map Sheet 1 Configuration Space Address Register Sheet 5Register Name Reset Value Write Access Read Access Control and Status Registers CSR Address Map Sheet 2 Ffff W1TC CSR Address Map Sheet 3Ffff W1TS CSR Address Map Sheet 4 Primary CSR and Downstream Memory 0 Bara Sheet 1 Address DecodingPrimary and Secondary Address CSR Address Map Sheet 5 Secondary CSR Memory BARsa Sheet 1 Primary CSR and Downstream Memory 0 Bara Sheet 2 Offsets Primary CSR I/O BAR Secondary CSR I/O BAR Secondary CSR Memory BARsa Sheet 2Primary and Secondary CSR I/O Barsa Upstream I/O or Memory 0 BAR Downstream I/O or Memory 1 and Upstream I/O or Memory 0 BAROffsets Downstream Memory 2 and 3 BAR, and Upstream Memory 1 BAR Upstream Memory 2 Bar Upper 32 Bits Downstream Memory 3 Bar Xlatbase Offsets Downstream I/O or MemoryTranslated Base Downstream Upstream Offsets Memory Translated Base Upstream I/O or Memory Setup 139 Upper 32 Bits Downstream Memory 3 Setup Register Configuration Transaction Generation Registers Cfgaddr Downstream and Upstream Configuration Address Registers Cfgdata Configuration Own Bits Register Configuration CSR Sheet 1 Ioaddr IA Configuration CSR Sheet 2Downstream I/O Address and Upstream I/O Address Registers Offset Downstream I/O Address Upstream I/O Address Iodata Downstream I/O Data and Upstream I/O Data RegistersO Own Bits Registers Offsets Downstream I/O Data Upstream I/O Data Lutoffset O CSRLookup Table Offset Register Upstream Memory 2 Lookup Table Configuration RegistersPCI Registers Lookup Table Data Register Device ID Register Primary Interface Configuration Space Address MapSecondary Interface Configuration Space Address Map Vendor ID Register Offsets Primary Command Secondary Command Primary and Secondary Command RegistersPrimary and Secondary Command Registers Sheet 1 Offsets Primary Status Secondary Status Primary and Secondary Command Registers Sheet 2Primary and Secondary Status Registers Sheet 1 SERR# Revision ID Rev ID Register Primary and Secondary Status Registers Sheet 2 Offsets Primary Cache Line Size Secondary Cache Line Size Primary and Secondary Class Code RegistersPrimary and Secondary Cache Line Size Registers Offsets Primary Class Code Secondary Class Code Offsets Primary MLT Secondary MLT Header Type RegisterBiST Register Primary and Secondary Interrupt Line Registers Subsystem Vendor ID RegisterSubsystem ID Register Enhanced Capabilities Pointer Register Primary and Secondary Maximum Latency Registers Primary and Secondary Interrupt Pin RegistersPrimary and Secondary Minimum Grant Registers Chip Control 0 Register Sheet 1 Device-Specific Control and Status RegistersDevice-Specific Control and Status Address Map Chip Control 0 Register Sheet 2 Chip Control 0 Register Sheet 3 Chip Control 0 Register Sheet 4 Chip Control 1 Register Sheet 1 Chip Control 1 Register Sheet 2 I20ENA Chip Control 1 Register Sheet 3Chip Status Register 163 Rots Generic Own Bits Register I2O Inbound PostList Status 16.6 I2O RegistersI2O Outbound PostList Status I2O Outbound PostList Interrupt Mask I2OOUT P I2O Inbound PostList Interrupt MaskI2O Inbound Queue I2O Outbound Queue I2O Outbound PostList Head Pointer I2O Inbound FreeList Head PointerI2O Inbound PostList Tail Pointer I2O Outbound FreeList Tail Pointer Ldifc W1TLS I2O Inbound PostList CounterI2O Inbound FreeList Counter Ldipc W1TLS Ldopc W1TLS I2O Outbound PostList CounterI2O Outbound FreeList Counter PMD0 W1TC Interrupt RegistersChip Status CSR Chip Set IRQ Mask Register PAGE0IRQ W1TC Chip Clear IRQ Mask RegisterUpstream Page Boundary IRQ 0 Register Upstream Page Boundary IRQ Mask 1 Register Upstream Page Boundary IRQ 1 RegisterUpstream Page Boundary IRQ Mask 0 Register Primary Set IRQ Primary Clear IRQ and Secondary Clear IRQ RegistersPrimary Set IRQ and Secondary Set IRQ Registers Primary Clear IRQ Secondary Clear IRQ Secondary Set IRQ Mask Primary Set IRQ Mask and Secondary Set IRQ Mask RegistersScratchpad 0 Through Scratchpad 7 Registers Sheet 1 Primary Clear IRQ Mask Secondary Clear IRQ Mask Primary Expansion ROM BAR Prom RegistersScratchpad 0 Through Scratchpad 7 Registers Sheet 2 Sequence on Primary Expansion ROM Setup Register Romdata ROM Setup RegisterROM Data Register Romaddr ROM Address RegisterROM Control Register Sheet 1 Srompoll Mode Setting Configuration Register Sheet 1Srom Registers ROM Control Register Sheet 2 Byte Description Offset Mode Setting Configuration Register Sheet 2Serial Preload Sequence Sheet 1 Serial Preload Sequence Sheet 2 Serial Preload Sequence Sheet 3 Arbiter Control Error Registers Secondary SERR# Disable Register Primary SERR# Disable Register PM ECP ID Power Management ECP ID and Next Pointer RegisterInit Registers PME Power Management Capabilities RegisterAPS DSI Pmcsr Bridge Support Extensions Power Management Control and Status Register Reset Control Register Power Management Data Register HS Next Pointer CompactPCI Hot-Swap Control Register Sheet 1 Jtag Instruction Register Options Sheet 1 Jtag RegistersCompactPCI Hot-Swap Control Register Sheet 2 Boundary Scan Order Jtag Instruction Register Options Sheet 2Bypass Register Boundary-Scan Register VPD ECP VPD RegistersVital Product Data VPD ECP ID and Next Pointer Register VPD Data Register Vital Product Data VPD Address RegisterPage Acronyms Acronyms CSR Index 140