Intel MultiProcessor manual Bus Type String Values, Bus Type String Description

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MP Configuration Table

Table 4-8. Bus Type String Values

Bus Type String	Description
CBUS	Corollary CBus

CBUSII	Corollary CBUS II

EISA	Extended ISA

FUTURE	IEEE FutureBus

INTERN	Internal bus

ISA	Industry Standard Architecture

MBI	Multibus I

MBII	Multibus II

MCA	Micro Channel Architecture

MPI	MPI

MPSA	MPSA

NUBUS	Apple Macintosh NuBus

PCI	Peripheral Component Interconnect

PCMCIA	PC Memory Card International Assoc.

TC	DEC TurboChannel

VL	VESA Local Bus

VME	VMEbus

XPRESS	Express System Bus

Each bus in a system must have a unique BUS ID if any one of the following criteria are true:

1.The bus does not share its memory address space with another bus.

2.The bus does not share its I/O address space with another bus.

3.The bus does not share interrupt lines with another bus.

4.Any aspect of the bus as an independent entity is software visible (such as PCI configuration space).

Special consideration must be given when assigning a BUS ID for local buses such as VL, which are designed to work in conjunction with another bus. If the bus looks like a part of another bus because it uses a subset of that bus's interrupts and address space, rendering it totally invisible to software, it does not need its own bus entry in the table. The two buses are then considered a single logical bus.

Version 1.4

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Contents MultiProcessor Specification Copyright 1993-1997. Intel Corporation, All Rights Reserved Revision Revision History Date Revision HistoryPage Table of Contents Contents MP Configuration TableDefault Configurations Appendix E Errata Glossary Appendix a System Bios Programming GuidelinesAppendix B Operating System Programming Guidelines Tables FiguresExamples Page Conceptual Overview GoalsScope Features of the SpecificationMultiProcessor Specification Introduction Target AudienceOrganization of This Document Document OrganizationFor More Information Conventions Used in This DocumentSystem Overview System Processors Hardware OverviewSystem Overview Advanced Programmable Interrupt Controller4 I/O Expansion Bus System MemoryOperating System Overview Bios OverviewPage System Memory Configuration Hardware SpecificationSystem Memory Address Map System Memory Cacheability and ShareabilityMemory Cacheability Map Hardware SpecificationLocking External Cache SubsystemApic Architecture Posted Memory WriteMultiprocessor Interrupt Control Apic Versions Interrupt ModesPIC Mode PIC Mode Virtual Wire Mode via Local Apic Virtual Wire ModeVirtual Wire Mode via I/O Apic Symmetric I/O Mode Symmetric I/O ModeApic Memory Mapping Assignment of System Interrupts to the Apic Local UnitFloating Point Exception Interrupt Apic Identification Apic Interval TimersSystem-wide Reset Reset SupportProcessor-specific Init System-wide InitSystem Initial State Support for Fault-resilient BootingMP Configuration Table MultiProcessor Specification Offset Length Field Bytesbits in bits Description MP Configuration TableMP Floating Pointer Structure Information Bytes MP FeatureOffset Length Field Bytesbits Bits Description Information ByteMP Configuration Table Header MP Configuration Table HeaderOffset Length Field Bytes Bits Description Base MP Configuration Table EntriesMP Configuration Table Header Fields Apic Base MP Configuration Table Entry TypesProcessor Entries Length Entry Description Entry Type Code Bytes CommentsProcessor Entry Fields Bit Name Description Comments Feature Flags from Cpuid InstructionIntel486 and Pentium Processor Signatures Family Model Stepping a DescriptionString Bus EntriesBUS ID BUS TypeBus Type String Description Bus Type String ValuesI/O Apic Entry Fields 3 I/O Apic Entries4 I/O Interrupt Assignment Entries Apic EntryI/O Interrupt Entry 10. I/O Interrupt Entry Fields Interrupt Type Description Comments Local Interrupt Assignment Entries11. Interrupt Type Values LINTIN# 12. Local Interrupt Entry FieldsDestination Local Apic ID Destination Local ApicExtended MP Configuration Table Entries System Address Space Mapping Entries 14. System Address Space Mapping Entry Fields 10. Example System with Multiple Bus Types and Bridge Types Bus Hierarchy Descriptor Entry Compatibility Bus Address Space Modifier Entry 12. Compatibility Bus Address Space Modifier Entry 16. Compatibility Bus Address Space Modifier Entry Fields Default Configurations Config Code CPUs Type Variant Schematic Discrete Apic ConfigurationsDefault Configurations Default Number BusDefault Configurations Default Configuration for Discrete ApicIntegrated Apic Configurations Default Configuration for Integrated Apic First I/O Default Configuration Interrupt AssignmentsConfig INTINx Comments Assignment of I/O Interrupts to the Apic I/O UnitLevel-triggered Interrupt Support All Local APICs Config LINTINx CommentsAssignment of System Interrupts to the Apic Local Unit Eisa and IRQ13MultiProcessor Specification Bios Post Initialization System Bios Programming GuidelinesControlling the Application Processors Programming the Apic for Virtual Wire ModeSystem Bios Programming Guidelines Example A-1. Programming Local Apic for Virtual Wire ModeNMI Constructing the MP Configuration TableSystem Bios Programming Guidelines Page Operating System Programming Guidelines Operating System Boot-upInterrupt Mode Initialization and Handling Operating System Booting and Self-configurationOperating System Programming Guidelines Application Processor StartupUsing Init IPI AP Shutdown Handling Using Startup IPIHandling TLB Invalidation Other IPI ApplicationsSpurious Apic Interrupts Handling Cache FlushSupporting Unequal Processors Page System Compliance Checklist Page Variable Interrupt Routing Interrupt Routing with Multiple APICsFixed Interrupt Routing INTD# Bus Entries in Systems with More Than One PCI BusI/O Interrupt Assignment Entries for PCI Devices Multiple I/O Apic Multiple PCI Bus SystemsPage Errata 126 System Address Space Entry System Address Space Mapping EntriesAddress Base 14. System Address Space Mapping Entry FieldsEntry Length Address TypeSpace records must also be provided Bus Hierarchy Descriptor EntryParent BUS BUS InformationsdGlossary Glossary-2 Order Number