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Platform Initialization (PI) Specification
Volume 1:
Pre-EFI Initialization Core Interface
Version 1.6
May 2017
Platform Initialization Specification, Vol. 1
ii May 2017 Version 1.6
The material contained herein is not a license, either expressly or impliedly, to any intellectual
property owned or controlled by any of the authors or developers of this material or to any
contribution thereto. The material contained herein is provided on an "AS IS" basis and, to the
maximum extent permitted by applicable law, this information is provided AS IS AND WITH ALL
FAULTS, and the authors and developers of this material hereby disclaim all other warranties
and conditions, either express, implied or statutory, including, but not limited to, any (if any)
implied warranties, duties or conditions of merchantability, of fitness for a particular purpose, of
accuracy or completeness of responses, of results, of workmanlike effort, of lack of viruses and
of lack of negligence, all with regard to this material 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 changes to them. ALSO, THERE IS NO WARRANTY OR CONDITION OF
TITLE, QUIET ENJOYMENT, QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION
OR NON-INFRINGEMENT WITH REGARD TO THE SPECIFICATION AND ANY
CONTRIBUTION THERETO.
IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THIS MATERIAL OR ANY
CONTRIBUTION THERETO BE LIABLE TO ANY OTHER PARTY FOR THE COST OF
PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS OF USE, LOSS
OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT, INDIRECT, OR SPECIAL
DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY, OR OTHERWISE, ARISING
IN ANY 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 2017 Unified EFI, Inc. All Rights Reserved.
Platform Initialization Specification, Vol. 1
Version 1.6 May 2017 iii
Revision History
Revision Mantis ID / Description Date
1.6 • 1567 Layered SPI bus
• 1648 PI Binding for RISC-V
• 1746 Add an FV Extended Header entry that contains the used size of the
FV
• 1763 MM Handler state notification protocol
• 1764 Add additional alignment
• 1768 Update the PI Spec to 1.6
• 1777 Update Revision History
• 1778 Update front matter
April 2017
1.5 Errata A • 1587 pre permanent memory page allocation
• 1665 Incorrect status code for an AP calling
EFI_MP_SERVICES_PROTOCOL.SwitchBSP()
• 1734 Outdated EFI spec reference in Save State Write
• 1735 Several copy & paste errors in Save State Write
• 1747 Clarify that MM_ACCESS_PROTOCOL should cover all MMRAM
region used by the platform
April 2017
1.5 • 1315 SMM Environment to Support Newer Architecture/Platform Designs
• 1317 additional I2C PPI's (vol5)
• 1321 ARM Extensions to Volume 4
• 1330 Add PPI to allow SEC pass HOBs into PEI
• 1336 Provide For Pre-DXE Initialization Of The SM Foundation
• 1369 Handling PEI PPI descriptor notifications from SEC
• 1387 Variable services errors not consistent
• 1390 SM stand-alone infrastructure
• 1396 Update SEC HOB Capabilities of 1330 with additional guidance
• 1413 Communicate protocol enhancements
• 1506 New MP protocol
• 1513 Need a way to propagate PEI-phase FV verification status to DXE
• 1563 Update MM PPIs to match existing implementations
• 1566 PI.next - update the specification revisions
• 1568 Add SD/MMC GUID to DiskInfo protocol
• 1592 Add EFI_FV_FILETYPE_SMM_CORE_STANDALONE file type
• 1593 coalesce language enhancements
• 1594 Pei GetVaiable M1387 issue
• 1595 M1568 Disk Info issue
• 1596 M1489 GCD issue
• 1603 Minor erratas in Vol4 PI 1.5 draft related to ECR 0001506
• 1607 Update MM guid def'n to match edkII impl
• 1626 Add new Status Code for BDS Attempting UEFI BootOrder entries
• 1628 Minor feedback for PI 1.5 Vol 4 SMM Draft
• 1666 Graphics Device Info Hob
4/26/16
Platform Initialization Specification, Vol. 1
iv May 2017 Version 1.6
1.4 Errata A • 1574 Fix artificial limitation in the PCD.SetSku support
• 1565 Update status code to include AArch64 exception error codes
• 1564 SMM Software Dispatch Protocol Errata
• 1562 Errata to remove statement from DXE vol about PEI dispatch
behavior
• 1561 Errata to provide Equivalent of DXE-CIS Mantis 247 for the PEI-CIS
• 1532 Allow S3 Resume without having installed permanent memory (via
InstallPeiMemory)
• 1530 errata on dxe report status code
• 1529 address space granularity errata
• 1525 PEI Services Table Retrieval for AArch64
• 1515 EFI_PEIM_NOTIFY_ENTRY_POINT return values are undefined
• 1497 Fixing language in SMMStartupThisAP
• 1489 GCD Conflict errata
• 1485 Minor Errata in SMM Vo2 description of SMMStartupThisAP
• 1397 PEI 1.4 specification revision errata
• 1394 Errata to Relax requirements on CPU rendez in SEC
• 1351 EndOfDxe and SmmReadyToLock
• 1322 Minor Updates to handle Asynchronous CPU Entry Into SMM
3/15/16
1.4 • 1210 Adding persistence attribute to GCD
• 1235 PI.Next Feature - no execute support
• 1236 PI.Next feature - Graphics PPI
• 1237 PI.Next feature - add reset2 PPI
• 1239 PI.Next feature - Disk Info Guid UFS
• 1240 PI.Next feature - Recovery Block IO PPI - UFS
• 1259 PI.Next feature - MP PPI
• 1273 PI.Next feature - capsule PPI
• 1274 Recovery Block I/O PPI Update
• 1275 GetMemoryMap Update
• 1277 PI1.next feature - multiple CPU health info
• 1278 PI1.next - Memory relative reliability definition
• 1305 PI1.next - specification number encoding
• 1331 Remove left-over Boot Firmware Volume references in the SEC
Platform Information PPI
• 1366 PI 1.4 draft - M1277 issue BIST / CPU. So health record needs to be
indexed / CPU.
2/20/15
Revision Mantis ID / Description Date
Platform Initialization Specification, Vol. 1
Version 1.6 May 2017 v
1.3 Errata A • 1041 typo in HOB Overview
• 1067 PI1.3 Errata for SetBootMode
• 1068 Updates to PEI Service table/M1006
• 1069 SIO Errata - pnp end node definition
• 1070 Typo in SIO chapter
• 1072 Errata – SMM register protocol notify clarification/errata
• 1093 Extended File Size Errata
• 1095 typos/errata
• 1097 PI SMM GPI Errata
• 1098 Errata on I2C IO status code
• 1099 I2C Protocol stop behavior errata
• 1104 ACPI System Description Table Protocol Errata
• 1105 ACPI errata - supported table revision
• 1177 PI errata - make CPU IO optional
• 1178 errata - allow PEI to report an additional memory type
• 1283 Errata - clarify sequencing of events
2/19/15
1.3 • 945 Integrated Circuit (I2C) Bus Protocol
• 998 PI Status Code additions
• 999 PCI enumeration complete GUID
• 1005 NVMe Disk Info guid
• 1006 Security Ppi Fixes
• 1025 PI table revisions
3/29/13
1.2.1 Errata A • 922 Add a "Boot with Manufacturing" boot mode setting
• 925 Errata on signed FV/Files
• 931 DXE Volume 2 - Clarify memory map construction from the GCD
• 936 Clarify memory usage in PEI on S3
• 937SMM report protocol notify issue errata
• 951 Root Handler Processing by SmiManage
• 958
• 969Vol 1 errata: TE Header parameters
10/26/12
1.2.1 Errata A • 922 Add a "Boot with Manufacturing" boot mode setting
• 925 Errata on signed FV/Files
• 931 DXE Volume 2 - Clarify memory map construction from the GCD
• 936 Clarify memory usage in PEI on S3
• 937 SMM report protocol notify issue errata
• 951 Root Handler Processing by SmiManage
• 958 Omissions in PI1.2.1 integration for M816 and M894
• 969Vol 1 errata: TE Header parameters
10/26/12
Revision Mantis ID / Description Date
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