MP Configuration Table | Intel MultiProcessor specification

4 MP Configuration Table

The operating system must have access to some information about the multiprocessor configuration. The MP specification provides two methods for passing this information to the operating system: a minimal method for configurations that conform to one of a set of common hardware defaults, and a maximal method that provides the utmost flexibility in hardware design. Figure 4-1 shows the general layout of the MP configuration data structures.

31

24 23

16 15

8

7

0

VARIABLE NUMBER OF

VARIABLE-LENGTH

ENTRIES

MP CONFIGURATION TABLE

FLOATING

POINTER

STRUCTURE

ENTRY LENGTH DEPENDS ON ENTRY TYPE

ENTRY TYPE

ENTRY LENGTH DEPENDS ON ENTRY TYPE

ENTRY TYPE

FIXED-LENGT H

HE ADER

31	24 23	16 15	8	7	0
31					0

PHYSICAL ADDRESS POINTER

02CH

0 0 H

Figure 4-1. MP Configuration Data Structures

Version 1.4

4-1

Image 37

Intel MultiProcessor manual MP Configuration Table

Contents

MultiProcessor Specification Copyright 1993-1997. Intel Corporation, All Rights Reserved Revision Revision History Date Revision HistoryPage Table of Contents Default Configurations MP Configuration TableContents Appendix B Operating System Programming Guidelines Appendix a System Bios Programming GuidelinesAppendix E Errata Glossary Tables Figures Examples Page Conceptual Overview Goals MultiProcessor Specification Features of the SpecificationScope Organization of This Document Target AudienceDocument Organization Introduction For More Information Conventions Used in This Document System Overview System Processors Hardware Overview System Overview Advanced Programmable Interrupt Controller 4 I/O Expansion Bus System Memory Operating System Overview Bios OverviewPage System Memory Configuration Hardware Specification System Memory Address Map System Memory Cacheability and Shareability Memory Cacheability Map Hardware Specification Locking External Cache Subsystem Multiprocessor Interrupt Control Posted Memory WriteApic Architecture Apic Versions Interrupt Modes PIC Mode PIC Mode Virtual Wire Mode via Local Apic Virtual Wire Mode Virtual Wire Mode via I/O Apic Symmetric I/O Mode Symmetric I/O Mode Floating Point Exception Interrupt Assignment of System Interrupts to the Apic Local UnitApic Memory Mapping Apic Identification Apic Interval Timers System-wide Reset Reset Support Processor-specific Init System-wide Init System Initial State Support for Fault-resilient Booting MP Configuration Table MultiProcessor Specification MP Floating Pointer Structure MP Configuration TableOffset Length Field Bytesbits in bits Description Offset Length Field Bytesbits Bits Description MP FeatureInformation Byte Information Bytes MP Configuration Table Header MP Configuration Table Header MP Configuration Table Header Fields Base MP Configuration Table EntriesOffset Length Field Bytes Bits Description Processor Entries Base MP Configuration Table Entry TypesLength Entry Description Entry Type Code Bytes Comments Apic Processor Entry Fields Intel486 and Pentium Processor Signatures Feature Flags from Cpuid InstructionFamily Model Stepping a Description Bit Name Description Comments BUS ID Bus EntriesBUS Type String Bus Type String Description Bus Type String Values 4 I/O Interrupt Assignment Entries 3 I/O Apic EntriesApic Entry I/O Apic Entry Fields I/O Interrupt Entry 10. I/O Interrupt Entry Fields 11. Interrupt Type Values Local Interrupt Assignment EntriesInterrupt Type Description Comments Destination Local Apic ID 12. Local Interrupt Entry FieldsDestination Local Apic LINTIN# Extended 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 Default Configurations Discrete Apic ConfigurationsDefault Number Bus Config Code CPUs Type Variant Schematic Default Configurations Default Configuration for Discrete Apic Integrated Apic Configurations Default Configuration for Integrated Apic Config INTINx Comments Default Configuration Interrupt AssignmentsAssignment of I/O Interrupts to the Apic I/O Unit First I/O Assignment of System Interrupts to the Apic Local Unit All Local APICs Config LINTINx CommentsEisa and IRQ13 Level-triggered Interrupt Support MultiProcessor Specification Bios Post Initialization System Bios Programming Guidelines Controlling the Application Processors Programming the Apic for Virtual Wire Mode System Bios Programming Guidelines Example A-1. Programming Local Apic for Virtual Wire Mode NMI Constructing the MP Configuration Table System Bios Programming Guidelines Page Operating System Programming Guidelines Operating System Boot-up Interrupt Mode Initialization and Handling Operating System Booting and Self-configuration Operating System Programming Guidelines Application Processor Startup Using Init IPI AP Shutdown Handling Using Startup IPI Spurious Apic Interrupts Other IPI ApplicationsHandling Cache Flush Handling TLB Invalidation Supporting Unequal Processors Page System Compliance Checklist Page Variable Interrupt Routing Interrupt Routing with Multiple APICs Fixed Interrupt Routing I/O Interrupt Assignment Entries for PCI Devices Bus Entries in Systems with More Than One PCI BusMultiple I/O Apic Multiple PCI Bus Systems INTD#Page Errata 126 System Address Space Entry System Address Space Mapping Entries Entry Length 14. System Address Space Mapping Entry FieldsAddress Type Address Base Space records must also be provided Bus Hierarchy Descriptor Entry Parent BUS BUS Informationsd Glossary Glossary-2 Order Number