UEFI平台初始化规范1.7版修订A

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"PI_Spec_1_7_A_final_May1.pdf 是UEFI Platform Initialization (PI) 规范的版本1.7 Errata A，由UEFI论坛在2020年4月发布。这份文档主要关注平台初始化的细节，并非提供任何知识产权的许可。文档以'AS IS'的形式提供，作者和开发者对其中可能存在的问题或不准确之处不作任何明示或暗示的保证。设计师不应依赖于任何被标记为'保留'或'未定义'的特性或指令。" 《UEFI Platform Initialization (PI) 规范》是定义现代计算机启动过程的重要标准，它扩展并取代了传统的BIOS系统。以下是该规范中的关键知识点： 1. **UEFI (统一可扩展固件接口)**：UEFI是一种开放标准，用于定义操作系统与硬件之间的接口，旨在提供更安全、高效和灵活的启动流程。与BIOS相比，UEFI提供了更丰富的图形用户界面，支持更大的硬盘容量和更快的启动时间。 2. **Platform Initialization (PI)**：平台初始化是UEFI规范的一部分，专注于系统从电源开启到操作系统接管控制之前的阶段。这个阶段包括多个阶段，如固件自检（POST）、固件初始化、安全启动等。 3. **版本1.7A**：这表示文档是PI规范的最新修订版，可能包含之前版本中发现的问题修正和增强功能。 Errata A通常意味着对原始1.7版本的错误进行了修复。 4. **知识产权（Intellectual Property）**：文档声明，提供的信息并不授予任何知识产权，无论是明示还是默示的。这意味着使用这些规范的设计师必须尊重所有相关技术的所有权。 5. **无保证条款（Warranties and Conditions）**：UEFI论坛明确表示，文档及其中的内容“AS IS”提供，不提供任何形式的保证，包括但不限于适销性、特定目的适用性、响应的准确性或完整性、结果、工作质量、无病毒以及无疏忽的保证。 6. **保留和未定义的特性**：文档中可能会有标记为“保留”或“未定义”的部分，这些特性不应被设计者依赖，因为它们可能会在未来版本中更改或解释。 7. **统一EFI论坛（Unified EFI Forum）**：这是一个由多家硬件和软件厂商组成的组织，负责制定和维护UEFI和PI规范，以推动行业的标准化和互操作性。这份规范对于理解现代计算机系统的启动流程、开发UEFI驱动程序、优化操作系统加载过程以及确保跨平台兼容性至关重要。工程师和开发者在设计和实现与UEFI相关的软件或固件时，应严格遵循此规范的指导。

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Platform Initialization Specification, Vol. 1

UEFI Forum, Inc. April 2020 1-ii

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.

The UEFI Forum is the owner of all rights and title in and to this work, including all copyright

rights that may exist, and all rights to use and reproduce this work. Further to such rights,

permission is hereby granted to any person implementing this specification to maintain an

electronic version of this work accessible by its internal personnel, and to print a copy of this

specification in hard copy form, in whole or in part, in each case solely for use by that person in

connection with the implementation of this Specification, provided no modification is made to the

Specification.

Platform Initialization Specification, Vol. 1

UEFI Forum, Inc. April 2020 1-iv

Table of Contents

Table of Contents........................................................................................... 1-iv

List of Tables.................................................................................................. 1-xi

List of Figures................................................................................................ 1-xii

1 Introduction...................................................................................................1-1

1.1 Overview........................................................................................................................ 1-1

1.2 Organization of the PEI CIS........................................................................................... 1-1

1.3 Conventions Used in this Document.............................................................................. 1-2

1.3.1 Data Structure Descriptions ...............................................................................1-2

1.3.2 Procedure Descriptions...................................................................................... 1-2

1.3.3 Instruction Descriptions...................................................................................... 1-3

1.3.4 PPI Descriptions................................................................................................. 1-3

1.3.5 Pseudo-Code Conventions ................................................................................ 1-4

1.3.6 Typographic Conventions .................................................................................. 1-4

1.4 Requirements................................................................................................................. 1-5

1.5 Conventions used in this document...............................................................................1-6

1.5.1 Number formats ................................................................................................. 1-6

1.5.2 Binary prefixes ...................................................................................................1-6

2 Overview........................................................................................................1-8

2.1 Introduction .................................................................................................................... 1-8

2.2 Design Goals ................................................................................................................. 1-8

2.3 Pre-EFI Initialization (PEI) Phase .................................................................................. 1-9

2.4 PEI Services ................................................................................................................1-10

2.5 PEI Foundation ............................................................................................................ 1-11

2.6 PEI Dispatcher.............................................................................................................1-11

2.7 Pre-EFI Initialization Modules (PEIMs) ........................................................................ 1-12

2.8 PEIM-to-PEIM Interfaces (PPIs) ..................................................................................1-12

2.9 Firmware Volumes....................................................................................................... 1-13

3 PEI Services Table......................................................................................1-14

3.1 Introduction .................................................................................................................. 1-14

3.2 PEI Services Table ...................................................................................................... 1-14

3.2.1 EFI_PEI_SERVICES........................................................................................ 1-14

4 Services - PEI..............................................................................................1-20

4.1 Introduction .................................................................................................................. 1-20

4.2 PPI Services ................................................................................................................1-20

InstallPpi() ........................................................................................................ 1-21

ReinstallPpi().................................................................................................... 1-22

LocatePpi().......................................................................................................1-23

NotifyPpi()......................................................................................................... 1-25

4.3 Boot Mode Services..................................................................................................... 1-25

GetBootMode()................................................................................................. 1-26

SetBootMode() ................................................................................................. 1-28

Platform Initialization Specification, Vol. 1

UEFI Forum, Inc. April 2020 1-v

4.4 HOB Services .............................................................................................................. 1-28

GetHobList()..................................................................................................... 1-29

CreateHob()...................................................................................................... 1-30

4.5 Firmware Volume Services.......................................................................................... 1-31

FfsFindNextVolume() ....................................................................................... 1-32

FfsFindNextFile().............................................................................................. 1-33

FfsFindSectionData() ....................................................................................... 1-35

FfsFindSectionData3() ..................................................................................... 1-36

FfsFindFileByName() ....................................................................................... 1-38

FfsGetFileInfo() ................................................................................................1-39

FfsGetFileInfo2() ..............................................................................................1-41

FfsGetVolumeInfo().......................................................................................... 1-43

RegisterForShadow() ....................................................................................... 1-45

4.6 PEI Memory Services .................................................................................................. 1-45

InstallPeiMemory() ........................................................................................... 1-46

AllocatePages()................................................................................................ 1-47

AllocatePool()................................................................................................... 1-49

CopyMem()....................................................................................................... 1-50

FreePages() ..................................................................................................... 1-51

SetMem().......................................................................................................... 1-53

4.7 Status Code Service .................................................................................................... 1-53

ReportStatusCode() .........................................................................................1-54

4.8 Reset Services.............................................................................................................1-57

ResetSystem().................................................................................................. 1-57

4.9 I/O and PCI Services ................................................................................................... 1-57

5 PEI Foundation ...........................................................................................1-58

5.1 Introduction .................................................................................................................. 1-58

5.1.1 Prerequisites ....................................................................................................1-58

5.1.2 Processor Execution Mode .............................................................................. 1-58

5.2 PEI Foundation Entry Point.......................................................................................... 1-60

5.2.1 PEI Foundation Entry Point.............................................................................. 1-60

5.3 PEI Calling Convention Processor Binding.................................................................. 1-63

5.4 PEI Services Table Retrieval ....................................................................................... 1-63

5.4.1 X86................................................................................................................... 1-63

5.4.2 x64 ...................................................................................................................1-64

5.4.3 Itanium Processor Family – Register Mechanism............................................ 1-64

5.4.4 ARM Processor Family – Register Mechanism................................................ 1-65

5.4.5 AArch64 Processor Family – Register Mechanism.......................................... 1-66

5.4.6 RISC-V Processor Family – Register Mechanism ........................................... 1-66

5.5 PEI Dispatcher Introduction ......................................................................................... 1-67

5.6 Ordering....................................................................................................................... 1-67

5.6.1 Requirements................................................................................................... 1-67

5.6.2 Requirement Representation and Notation...................................................... 1-67

5.6.3 PEI a priori File Overview................................................................................. 1-68

PEI_APRIORI_FILE_NAME_GUID.................................................................. 1-69

5.6.4 Firmware Volume Image Files ......................................................................... 1-70

Platform Initialization Specification, Vol. 1

UEFI Forum, Inc. April 2020 1-vi

5.6.5 PEIM Dependency Expressions....................................................................... 1-70

5.6.6 Types of Dependencies ................................................................................... 1-70

5.7 Dependency Expressions ............................................................................................ 1-70

5.7.1 Introduction ......................................................................................................1-70

PUSH ............................................................................................................... 1-72

AND.................................................................................................................. 1-74

OR....................................................................................................................1-75

NOT.................................................................................................................. 1-76

TRUE................................................................................................................ 1-77

FALSE..............................................................................................................1-78

END.................................................................................................................. 1-79

5.7.2 Dependency Expression with No Dependencies ............................................. 1-80

5.7.3 Empty Dependency Expressions ..................................................................... 1-80

5.7.4 Dependency Expression Reverse Polish Notation (RPN)................................1-80

5.8 Dispatch Algorithm....................................................................................................... 1-80

5.8.1 Overview ..........................................................................................................1-80

5.8.2 Requirements................................................................................................... 1-81

5.8.3 Example Dispatch Algorithm............................................................................ 1-83

5.8.4 Dispatching When Memory Exists ................................................................... 1-84

5.8.5 PEIM Dispatching............................................................................................. 1-85

5.8.6 PEIM Authentication......................................................................................... 1-85

6 Architectural PPIs.......................................................................................1-86

6.1 Introduction .................................................................................................................. 1-86

6.2 Required Architectural PPIs......................................................................................... 1-86

6.2.1 Master Boot Mode PPI (Required)................................................................... 1-86

EFI_PEI_MASTER_BOOT_MODE_PPI (Required) ........................................ 1-86

6.2.2 DXE IPL PPI (Required)................................................................................... 1-87

EFI_DXE_IPL_PPI (Required) ......................................................................... 1-87

EFI_DXE_IPL_PPI.Entry() ............................................................................... 1-88

6.2.3 Memory Discovered PPI (Required) ................................................................1-90

EFI_PEI_PERMANENT_MEMORY_INSTALLED_PPI (Required).................. 1-90

6.3 Optional Architectural PPIs..........................................................................................1-91

6.3.1 Boot in Recovery Mode PPI (Optional) ............................................................ 1-91

EFI_PEI_BOOT_IN_RECOVERY_MODE_PPI (Optional).............................. 1-91

6.3.2 End of PEI Phase PPI (Optional) .................................................................... 1-92

EFI_PEI_END_OF_PEI_PHASE_PPI (Optional)............................................. 1-92

6.3.3 PEI Reset PPI ..................................................................................................1-93

EFI_PEI_RESET_PPI (Optional) ..................................................................... 1-93

6.3.4 PEI Reset2 PPI ................................................................................................ 1-93

EFI_PEI_RESET2_PPI (Optional) ................................................................... 1-93

ResetSystem() .................................................................................................1-95

6.3.5 Status Code PPI (Optional).............................................................................. 1-97

EFI_PEI_PROGRESS_CODE_PPI (Optional)................................................. 1-97

6.3.6 Security PPI (Optional).....................................................................................1-98

EFI_PEI_SECURITY2_PPI (Optional) ............................................................. 1-98

EFI_PEI_SECURITY2_PPI.AuthenticationState() ........................................... 1-99

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UEFI平台初始化规范1.7版修订A

PI_Spec_1_6.pdf

EFI-PI_Spec_1_7_final_Jan_2019.pdf

muX = [1 2 3]; sigmaX = [0.5 0 0; 0 1 0; 0 0 2]; pi_pdf_cell = get_pi_pdf(muX, sigmaX); x = [1.2 2.5 3.8]'; pdf_all = zeros(length(pi_pdf_cell), 1); for kk = 1:length(pi_pdf_cell) pdf_all(kk) = pi_pdf_cell{kk}(x); end 无法执行赋值，因为左侧和右侧的元素数目不同。

uefi编程实践pdf

muX = [1 2 3]; sigmaX = [0.5 0 0; 0 1 0; 0 0 2]; pi_pdf_cell = get_pi_pdf(muX, sigmaX); x = [1.2 2.5 3.8]'; pdf_all = zeros(length(pi_pdf_cell), length(x)); for kk = 1:length(pi_pdf_cell) pdf_all(kk, :) = pi_pdf_cell{kk}(x)'; end，若x=rand(9,3)怎么办？

{call xd_pk14_ebp_ps.import_pending_ps_item( #{pi_worksheet_no,jdbcType=VARCHAR,mode=IN}, #{pi_policy_ref,jdbcType=VARCHAR,mode=IN}, #{pi_movement_code,jdbcType=VARCHAR,mode=IN}, #{number,jdbcType=INTEGER,mode=OUT})}

用x=rand(9,3)，for kk = 1:n % 以 muX(kk) 为均值，sigmaX(kk) 为标准差的正态分布概率密度函数 pi_pdf = @(x) normpdf(x,muX(kk),sigmaX(kk)); % 将函数句柄保存在一个 cell 数组中 pi_pdf_cell{kk} = pi_pdf; end举个例子

pi_million_digits.txt

弹性力学数值方法：积分法：积分法基本原理.docx

autots-0.5.7-py3-none-any.whl.zip

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