AMD Athlon 6 Bedienungsanleitung

AMD Athlon™ Processor Model 6

Revision Guide

Publication # 24332 Rev: E

Issue Date: December 2002

Preliminary Information

Trademarks

AMD, the AMD Arrow logo, AMD Athlon, and combinations thereof, are trademarks of Advanced Micro Devices,

Inc.

Other product names used in this publication are for identification purposes only and may be trademarks of

their respective companies.

The contents of this document are provided in connection with Advanced

Micro Devices, Inc. (“AMD”) products. AMD makes no representations or

warranties with respect to the accuracy or completeness of the contents of

this publication and reserves the right to make changes to specifications and

product descriptions at any time without notice. No license, whether express,

implied, arising by estoppel or otherwise, to any intellectual property rights

is granted by this publication. Except as set forth in AMD’s Standard Terms

and Conditions of Sale, AMD assumes no liability whatsoever, and disclaims

any express or implied warranty, relating to its products including, but not

limited to, the implied warranty of merchantability, fitness for a particular

purpose, or infringement of any intellectual property right.

The AMD products described herein may contain design defects or errors

(“Product Errata”) that cause AMD products to deviate from published spec-

ifications. Currently characterized Product Errata may be available upon

request.

AMD’s products are not designed, intended, authorized or warranted for use

as components in systems intended for surgical implant into the body, or in

other applications intended to support or sustain life, or in any other applica-

tion in which the failure of AMD’s product could create a situation where per-

sonal injury, death, or severe property or environmental damage may occur.

AMD reserves the right to discontinue or make changes to its products at any

time without notice.

24332E—December 2002 AMD Athlon™ Processor Model 6 Revision Guide

Preliminary Information

Revision History

Date Rev Description

December 2002 E Added errata #22–24.

July 2002 D Added errata #20 and #21.

October 2001 C

■Added silicon revision A5 information

■Added erratum #18 and #19

■Added Table 2: Cross-reference of Erratum to Processor Segments to include all processor

segments

■Updated reference documents listed in section 3.1

May 2001 B Initial public release.

AMD Athlon™ Processor Model 6 Revision Guide 24332E—December2002

Preliminary Information

AMD Athlon™ Processor Model 6

Revision Guide

The purpose of the AMD Athlon™ Processor Model 6 Revision Guide is to communicate updated product

information on the AMD Athlon processor model 6 to designers of computer systems and software

developers. This revision guide applies to the AMD Athlon processor model 6, mobile AMD Athlon

processor model 6, and AMD Athlon MP processor model 6. This guide consists of three sections:

■Product Errata: This section, which starts on page 5, provides a detailed description of product

errata, including potential effects on system operation and suggested workarounds. An erratum is

defined as a deviation from the product’s specification. A product errata may cause the behavior of

the AMD Athlon processor model 6 to deviate from the published specifications.

■Revision Determination: This section, which starts on page 16, shows the AMD Athlon processor

model 6 identification numbers returned by the CPUID instruction for each revision of the

processor.

■Technical and Documentation Support: This section, which starts on page 17, provides a listing of

available technical support resources. It also lists corrections, modifications, and clarifications to

listed documents. Please refer to the data sheets listed in this section for product marking

information.

Revision Guide Policy

Occasionally AMD identifies deviations from or changes to the specification of the AMD Athlon

processor model 6. These changes are documented in the AMD Athlon™ Processor Model 6 Revision

Guide as errata. Descriptions are written to assist system and software designers in using the

AMD Athlon processor model 6 and corrections to AMD’s documentation on the AMD Athlon

processor model 6 are included. This release documents currently characterized product errata.

24332E—December 2002 AMD Athlon™ Processor Model 6 Revision Guide

Preliminary Information

1 Product Errata

This section documents AMD Athlon™ Processor Model 6 product errata. The errata are divided into

categories to assist referencing particular errata. A unique tracking number for each erratum has been

assigned within this document for user convenience in tracking the errata within specific revision

levels. Table 1 cross-references the revisions of the processor to each erratum. An “X” indicates that

the erratum applies to the stepping. The absence of an “X” indicates that the erratum does not apply

to the stepping. Table 2 on page 6 cross-references erratum to each processor segment. An “X”

indicates that the erratum applies to the processor segment.

Note: There can be missing errata numbers. Errata that have been resolved from early revisions of the

processor have been deleted, and errata that have been reconsidered may have been deleted or

renumbered.

Table 1. Cross-Reference of Product Revision to Errata

Errata Numbers and Description

Revision

Numbers

A0 A2 A5

16 INVLPG Instruction Does Not Flush Entire Four-Megabyte Page Properly with

Certain Linear Addresses XX

17 Deadlock May Occur in a Two-Processor System in the Presence of Probe to

Memory- Mapped I/O XX X

18 Processor May Issue Non-Connect Bus Cycle After FID Special Cycle X X

19 Processor Does Not Support Reliable Microcode Patch Mechanism X

20 Processor Performance Counters Do Not Count Some x86 Instructions X X X

21 A Speculative SMC Store Followed by an Actual SMC Store May Cause One-

Time Stale Execution XX X

22 Real Mode RDPMC with Illegal ECX May Cause Unpredictable Operation X X X

23 Using Task Gates With Breakpoints Enabled May Cause Unexpected Faults X X X

24 Single Step Across I/O SMI Skips One Debug Trap X X X

AMD Athlon™ Processor Model 6 Revision Guide 24332E—December2002

Preliminary Information

Table 2. Cross-Reference of Erratum to Processor Segments

Errata

Number Workstation/Server1Desktop2Mobile3

16 XXX

17 X

18 X

19 XXX

20 XXX

21 XXX

22 XXX

23 XXX

24 XXX

Notes:

1. The workstation/server segment currently includes the AMD Athlon™ MP processor.

2. The desktop segment currently includes the AMD Athlon XP processor.

3. The mobile segment currently includes the AMD Athlon 4 processor.

24332E—December 2002 AMD Athlon™ Processor Model 6 Revision Guide

Preliminary Information

16 INVLPG Instruction Does Not Flush Entire Four-Megabyte Page Properly with Certain

Linear Addresses

Products Affected. A0, A2

Normal Specified Operation. After executing an INVLPG instruction the TLB should not contain any

translations for any part of the page frame associated with the designated logical address.

Non-conformance. When the logical address designated by the INVLPG instruction is mapped by a 4-

Mbyte page mapping and LA[21] is equal to one it is possible that the TLB will still retain translations

after the instruction has finished executing.

Potential Effect on System. The residual data in the TLB can result in unexpected data access to stale or

invalid pages of memory.

Suggested Workaround. When using the INVLPG instruction in association with a page that is mapped via

a 4-Mbyte page translation, always clear bit 21.

Resolution Status. Fix planned for a future revision.

AMD Athlon™ Processor Model 6 Revision Guide 24332E—December2002

Preliminary Information

17 Deadlock May Occur in a Two-Processor System in the Presence of Probe to Memory-

Mapped I/O

Products Affected. A0, A2, A5

Normal Specified Operation. Processor should not hang.

Non-conformance. In a multiprocessor system, if one processor (A) is continuously writing to a cacheable

memory-mapped I/O block while the other processor (B) is trying to read the same cacheable I/O block,

and at the same time both processors are also trying to write a different memory-based cache block,

then processor B may hang. Should this occur and processor A fields an interrupt, the deadlock will be

resolved.

Potential Effect on System. System will hang or exhibit performance degradation.

Suggested Workaround. The current processor design assumes that memory-mapped I/O is incoherent and

does not handle all deadlock cases. System logic should not generate probes for memory mapped I/O

addresses.

Resolution Status. No fix planned.

24332E—December 2002 AMD Athlon™ Processor Model 6 Revision Guide

Preliminary Information

18 Processor May Issue Non-Connect Bus Cycle After FID Special Cycle

Products Affected. A0, A2

Normal Specified Operation. The first processor cycle after a FID Change special cycle should be a Connect

special cycle.

Non-conformance. In rare circumstances, a processor victim write may be pending inside the processor

when the FID Change special cycle is issued. Several bus clocks later, the WrVictimBlk command for

the victim will be issued. This violates the specification, which states that all processor-based

commands should be finished before the FID change special cycle.

Potential Effect on System. The core logic may become confused.

Suggested Workaround. System core logic can wait for numerous bus clocks after receiving the FID change

special cycle before attempting to disconnect in order to generate a window sufficiently large enough

to allow the WrVictimBlk transaction to take place prior to the disconnect.

Resolution Status. Fix planned for a future revision.

AMD Athlon™ Processor Model 6 Revision Guide 24332E—December2002

Preliminary Information

19 Processor Does Not Support Reliable Microcode Patch Mechanism

Products Affected. A5

Normal Specified Operation. The processor should function properly after a microcode patch is loaded.

Non-conformance. The processor has the patch RAM BIST function disabled. Since BIST is not run on the

patch RAM, reliable operation of the patch RAM cannot be guaranteed. Therefore it should not be

used.

Potential Effect on System. When a microcode patch is loaded, the system may not behave properly.

Suggested Workaround. Do not load a microcode patch.

Resolution Status. Fix planned for a future revision.

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