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UEFI PI1.2 Sepc

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VOLUME 1: Platform Initialization
Specification
Pre-EFI Initialization
Core Interface
Version 1.2 Errata A
February 24, 2010

Platform Initialization Specification VOLUME 1 PEI Core Interface
ii 2/24/2010 Version 1.2 Errata A
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controlled by any of the authors or developers of this material or to any contribution thereto. The material contained
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and any contribution thereto. Designers must not rely on the absence or characteristics of any features or instructions
marked "reserved" or "undefined." The Unified EFI Forum, Inc. reserves any features or instructions so marked for
future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future
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POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT WITH REGARD TO THE
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WAY OUT OF THIS OR ANY OTHER AGREEMENT RELATING TO THIS DOCUMENT, WHETHER OR NOT SUCH
PARTY HAD ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Copyright 2006-2010 Unified EFI, Inc. All Rights Reserved.

Version 1.2 Errata A 2/24/2010 iii
Revision History
Revision Revision History Date
1.0 Initial public release. 8/21/06
1.0 errata Mantis tickets:
• M47 dxe_dispatcher_load_image_behavior
• M48 Make spec more consistent GUID & filename.
• M155 FV_FILE and FV_ONLY: Change subtype number back to
th:e original one.
• M171Remove 10 us lower bound restriction for the TickPeriod in
the Metronome
• M178 Remove references to tail in file header and made file
checksum for the data
• M183 Vol 1-Vol 5: Make spec more consistent.
• M192 Change PAD files to have an undefined GUID file name and
update all FV
10/29/07
1.1 Mantis tickets:
• M39 (Updates PCI Hostbridge & PCI Platform)
• M41 (Duplicate 167)
• M42 Add the definition of theDXE CIS Capsule AP & Variable AP
• M43 (SMbios)
• M46 (SMM error codes)
• M163 (Add Volume 4--SMM
• M167 (Vol2: adds the DXE Boot Services Protocols--new Chapter
12)
• M179 (S3 boot script)
• M180 (PMI ECR)
• M195 (Remove PMI references from SMM CIS)
• M196 (disposable-section type to the FFS)
11/05/07
1.1
correction
Restore (missing) MP protocol 03/12/08
1.1 Errata Revises typographical errors and minor omissions--see Errata for
details
04/25/08

Platform Initialization Specification VOLUME 1 PEI Core Interface
iv 2/24/2010 Version 1.2 Errata A
1.1 Errata Mantis tickets
• 204 Stack HOB update 1.1errata
• 225 Correct references from
EFI_FIRMWARE_VOLUME_PROTOCOL to
EFI_FIRMWARE_VOLUME2_PROTOCOL
• 226 Remove references to Framework
• 227 Correct protocol name
GUIDED_SECTION_EXTRACTION_PROTOCOL
• 228 insert"typedef" missing from some typedefs in Volume 3
• 243 Define interface "EFI_PEI_FV_PPI" declaration in PI1.0
FfsFindNextVolume()
• 285 Time quality of service in S3 boot script poll operation
• 287 Correct MP spec, PIVOLUME 2:Chapter 13.3 and 13.4 -
return error language
• 290 PI Errata
• 305 Remove Datahub reference
• 336 SMM Control Protocol update
• 345 PI Errata
• 353 PI Errata
• 360 S3RestoreConfig description is missing
• 363 PI Volume 1 Errata
• 367 PCI Hot Plug Init errata
• 369 Volume 4 Errata
• 380 SMM Development errata
• 381 Errata on EFI_SMM_SAVE_STATE_IO_INFO
•
01/13/09
1.1 Errata • 247 Clarification regarding use of dependency expression section
types with firmware volume image files
• 399 SMBIOS Protocol Errata
• 405 PIWG Volume 5 incorrectly refers to
EFI_PCI_OVERRIDE_PROTOCOL
• 422 TEMPORARY_RAM_SUPPORT_PPI is misnamed
• 428 Volume 5 PCI issue
• 430 Clarify behavior w/ the FV extended header
02/23/09
1.2 • 271 Support For Large Firmware Files And Firmware File
Sections
• 284 CPU I/O protocol update
• 286 Legacy Region protocol
• 289 Recovery API
• 292 PCD Specification Update
• 354 ACPI Manipulation Protocol
• 355 EFI_SIO_PROTOCOL Errata
• 365 UEFI Capsule HOB
• 382 IDE Controller Specification
• 385 Report Status Code Router Specification
• 386 Status Code Specification
01/19/09

Version 1.2 Errata A 2/24/2010 v
1.2 • 401 SMM Volume 4 issue
• 402 SMM PI spec issue w.r.t. CRC
• 407 Add LMA Pseudo-Register to SMM Save State Protocol
• 409 PCD_PROTOCOL Errata
• 411 Draft Errata, Volume 5, Section 8
• 412 Comment: PEI_S3_RESUME_PPI should be
EFI_PEI_S3_RESUME_PPI
• 414 Draft Chapter 7 Comments
• 415 Comment: Report Status Code Routers
• 416 EFI_CPU_IO_PROTOCOL2 Name should be
EFI_CPU_IO2_PROTOCOL
• 417 Volume 5, Chapter 4 & 5 order is reversed
• 423 Comment: Section 15.2.1 Formatting Issues vol5
• 424 Comments: Volume 5, Appendix A.1 formatting issues
• 425 Comment: Formatting in Section 6.1 of Volume 3
• 426 Comments: Volume 2
• 427 Comment: Volume 3, Section 6
• 433 Editorial issues in PI 1.2 draft
02/23/09
1.2 • 407 Comment: additional change to LMA Pseudo-Register
• 441 Comment: PI Volume 3, Incorrect Struct Declaration (esp
PCD_PPI)
• 455 Comment: Errata - Clarification of InstallPeiMemory()
• 465 Comment: Errata on PMI interface
• 466 Comment: Vol 4 EXTENDED_SAL_PROC definition
• 467 Comments: PI1.1 errata
• 480 Comment: FIX to PCD_PROTOCOL and PCD_PPI
05/13/09
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