Intel Extensible Firmware Interface Manuale Utente Scaricare il pdf (Pagina 107)

Services — Boot Services

Version 1.10 12/01/02 5-9

CloseEvent()

Summary

Closes an event.

Prototype

EFI_STATUS

CloseEvent (

IN EFI_EVENT Event

);

Parameters

Event The event to close. Type EFI_EVENT is defined in the

CreateEvent()

function description.

Description

The CloseEvent() function removes the caller’s reference to the event and closes it. Once the

event is closed, the event is no longer valid and may not be used on any subsequent function calls.

Status Codes Returned

EFI_SUCCESS The event has been closed.

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Specification 1
Acknowledgements 2
History 3
Contents 5
Version 1.10 12/01/02 vii 7
Version 1.10 12/01/02 ix 9
Contents 11
Version 1.10 12/01/02 xi 11
Version 1.10 12/01/02 xv 15
Version 1.10 12/01/02 xix 19
Version 1.10 12/01/02 xxi 21
Version 1.10 12/01/02 xxv 25
Introduction 27
1-2 12/01/02 Version 1.10 28
1.2 Overview 29
1.3 Goals 32
Version 1.10 12/01/02 1-7 33
1.4 Target Audience 34
1.5 EFI Design Overview 34
1.6 EFI Driver Model 35
1.6.1 EFI Driver Model Goals 36
1.7 Migration Requirements 37
1-12 12/01/02 Version 1.10 38
Version 1.10 12/01/02 1-13 39
1.8.5 Pseudo-Code Conventions 40
1.8.6 Typographic Conventions 40
Overview 41
2.1.1 EFI Images 42
2.1.2 EFI Applications 43
2.1.3 EFI OS Loaders 44
2.1.4 EFI Drivers 44
2.2.1 EFI Services 45
2.2.2 Runtime Services 46
2.3.1 Data Types 47
NULL may be 48
2.3.2 IA-32 Platforms 49
2.3.2.1 Handoff State 50
2.3.3 Itanium 51
-Based Platforms 51
2.4 Protocols 52
Table 2-4. EFI Protocols 54
2.5 EFI Driver Model 55
Figure 2-5. Desktop System 56
Figure 2-6. Server System 56
Version 1.10 12/01/02 2-17 57
2-18 12/01/02 Version 1.10 58
Version 1.10 12/01/02 2-19 59
2.5.2 Driver Initialization 60
2.5.3 Host Bus Controllers 61
2.5.4 Device Drivers 63
2.5.5 Bus Drivers 64
Bus Controller 65
2.5.6 Platform Components 66
2.5.7 Hot-Plug Events 67
2.6.1 Required Elements 68
Version 1.10 12/01/02 2-29 69
2-30 12/01/02 Version 1.10 70
Boot Manager 71
Descriptor 73
Table 3-1 Global Variables 75
3.4 Boot Mechanisms 77
3.4.2.1 Network Booting 78
3.4.2.2 Future Boot Media 78
EFI System Table 79
4.2 EFI Table Header 81
EFI_TABLE_HEADER 81
4.3 EFI System Table 82
EFI_SYSTEM_TABLE 82
EFI_BOOT_SERVICES 84
EFI System Table 85
EFI_RUNTIME_SERVICES 89
EFI_CONFIGURATION_TABLE 91
Table 5-2. TPL Usage 101
Table 5-3. TPL Restrictions 102
Prototype 103
Parameters 103
Related Definitions 103
5-6 12/01/02 Version 1.10 104
Description 105
Status Codes Returned 106
ExitBootServices() 117
Services — Boot Services 125
Version 1.10 12/01/02 5-27 125
5.3 Protocol Handler Services 129
5-32 12/01/02 Version 1.10 130
Version 1.10 12/01/02 5-33 131
Figure 5-2. Handle Database 132
Version 1.10 12/01/02 5-35 133
EFI 1.10 Extension 136
Examples 152
5.4 Image Services 174
Table 5-9. Image Functions 175
StartImage() 178
UnloadImage() 179
5-94 12/01/02 Version 1.10 192
6.1 Variable Services 194
GetVariable() 195
Summary 195
GetNextVariableName() 197
SetVariable() 199
6.2 Time Services 201
GetTime() 202
6.3 Virtual Memory Services 208
SetVirtualAddressMap() 209
ResetSystem() 213
EFI_LOADED_IMAGE Protocol 217
Version 1.10 12/01/02 7-3 219
8.1 Device Path Overview 221
8.2 EFI_DEVICE_PATH Protocol 222
EFI_DEVICE_PATH Protocol 222
8.3 Device Path Nodes 223
8.3.2 Hardware Device Path 225
8.3.2.1 PCI Device Path 225
8.3.2.2 PCCARD Device Path 225
8.3.2.4 Vendor Device Path 226
8.3.3 ACPI Device Path 227
Table 8-8. ACPI Device Path 228
8.3.4 Messaging Device Path 229
8.3.4.1 ATAPI Device Path 229
8.3.4.2 SCSI Device Path 230
8.3.4.4 1394 Device Path 230
8.3.4.5 USB Device Path 231
8.3.4.7 I 232
O Device Path 232
8.3.4.9 IPv4 Device Path 232
8.3.4.10 IPv6 Device Path 233
8.3.4.12 UART Device Path 234
8.3.5 Media Device Path 236
8.3.5.1 Hard Drive 236
8.4.1 Housekeeping Rules 240
8.4.3 Rules with ACPI _ADR 241
8.4.6 Other Rules 242
EFI_DRIVER_BINDING_PROTOCOL 243
Protocol Interface Structure 244
Version 1.10 12/01/02 9-5 247
Pseudo Code 249
9-8 12/01/02 Version 1.10 250
Chapter 4 251
EFI_COMPONENT_NAME_PROTOCOL 289
10.1 Console I/O Protocol 295
SIMPLE_INPUT_INTERFACE 297
10.2 Simple Input Protocol 298
SIMPLE_INPUT 298
Version 1.10 12/01/02 10-5 299
SIMPLE_INPUT.ReadKeyStroke() 300
SIMPLE_TEXT_OUTPUT Protocol 302
10.4.1 UGA ROM 318
10.4.2 UGA Draw Protocol 319
10.4.3 Blt Buffer 319
10.4.4 UGA I/O Protocol 320
10.4.5 Fallback Mode Driver 320
10.5 UGA Draw Protocol 321
EFI_UGA_DRAW_PROTOCOL 321
EFI_UGA_DRAW_PROTOCOL.Blt() 325
10.7 UGA I/O Protocol 329
EFI_UGA_IO_PROTOCOL 329
EFI_SIMPLE_POINTER_PROTOCOL 340
10.12 Serial I/O Protocol 349
SERIAL_IO_PROTOCOL 349
SERIAL_IO.SetAttributes() 353
SERIAL_IO.SetControl() 355
11.1 LOAD_FILE Protocol 361
LOAD_FILE Protocol 361
LOAD_FILE.LoadFile() 362
11.2 File System Format 364
11.2.1.1 File System Format 365
11.2.1.2 File Names 365
11.2.1.3 Directory Structure 365
11.2.2 Partition Discovery 367
Partition 369
Table HDR 369
11.2.3 Media Formats 375
11.2.3.1 Removable Media 375
11.2.3.2 Diskette 375
11.2.3.3 Hard Drive 376
11.2.3.4 CD-ROM and DVD-ROM 376
11.2.3.5 Network 376
11.3 File System Protocol 377
11.4 EFI_FILE Protocol 380
EFI_FILE Protocol 380
EFI_FILE.Open() 382
EFI_FILE.Write() 387
EFI_FILE_INFO 393
11.5 DISK_IO Protocol 397
DISK_IO Protocol 397
11.6 BLOCK_IO Protocol 401
BLOCK_IO Protocol 401
EFI_BLOCK_IO.ReadBlocks() 405
EFI_BLOCK_IO.WriteBlocks() 407
UNICODE_COLLATION Protocol 410
0 s1 is equivalent to s2 412
UNICODE_COLLATION.StrLwr() 415
UNICODE_COLLATION.StrUpr() 416
UNICODE_COLLATION.FatToStr() 417
Protocols-PCIBusSupport 419
Core Chipset Components 420
Front Side Bus 420
Device Handle 421
PCI Local Bus 422
PCI Host Bus 422
PCI Root Bridge 422
PCI Segment 0 424
PCI Segment 1 424
0x26 0x08 Address Length 459
Image Handle 464
EFI_LOADED_IMAGE_PROTOCOL 464
12.3.2 PCI Bus Drivers 467
PCI Controller Device Handle 469
12.3.2.2 PCI Enumeration 471
12.3.3 PCI Device Drivers 471
12.4 EFI PCI I/O Protocol 473
EFI_PCI_IO_PROTOCOL 474
to the PCI Root Bridge 483
for the 484
for the width specified by 486
, Width, and Count is not 488
, Width, and Count 495
, Width, and Count is 495
EFI_PCI_IO_PROTOCOL.Map() 496
, and Length 510
12.4.1 PCI Device Paths 512
12.4.2 PCI Option ROMs 514
Byte Length Description 515
to EFI Image 516
to PCIR Data Structure 516
PCI Device Driver Image 517
12.4.3 Nonvolatile Storage 519
12.4.4 PCI Hot-Plug Events 520
EFI_SCSI_PASS_THRU Protocol 521
Protocols - USB Support 541
EFI_USB_HC_PROTOCOL 542
14-4 12/01/02 Version 1.10 544
14.2 USB Driver Model 574
14.2.3 USB Bus Driver 575
14.2.3.3 USB Hot-Plug Event 576
14.2.4 USB Device Driver 577
EFI_USB_IO Protocol 578
Status Code Returned 582
Protocols — USB Support 599
14-62 12/01/02 Version 1.10 602
14.2.6 USB Device Paths 604
EFI_SIMPLE_NETWORK Protocol 607
IN UINTN BufferSize 624
EFI_SIMPLE_NETWORK.Receive() 630
Revision Number 632
15.3 PXE Base Code Protocol 635
EFI_PXE_BASE_CODE Protocol 635
DHCP Packet Data Types 642
IP Receive Filter Settings 644
ARP Cache Entries 644
EFI_PXE_BASE_CODE.Start() 647
EFI_PXE_BASE_CODE.Dhcp() 651
EFI_PXE_BASE_CODE.Discover() 653
EFI_PXE_BASE_CODE.Mtftp() 656
EFI_PXE_BASE_CODE.UdpWrite() 660
EFI_PXE_BASE_CODE.UdpRead() 662
Protocols — Network Support 665
Version 1.10 12/01/02 15-59 665
EFI_BIS.Initialize() 678
EFI_BIS.Shutdown() 682
EFI_BIS.GetSignatureInfo() 688
Digest-Algorithms: SHA-1 697
EFI_BIS.VerifyBootObject() 701
16.1 Overview 715
EFI_DEBUG_SUPPORT_PROTOCOL 717
UINT16 Ds; 721
16.3 EFI Debugport Protocol 728
EFI_DEBUGPORT_PROTOCOL 729
16.3.2 Debugport Device Path 734
16.4.1 Overview 736
16.4.3 EFI Image Info 738
17.2 Data Format 743
Block Header 744
Block Body 744
Table 17-1 745
17.2.3.2 Block Body 747
17.3 Compressor Design 748
17.3.2 String Info Log 749
17.3.2.1 Data Structures 750
17.3.2.2 Searching the Tree 751
17.3.2.3 Adding String Info 751
Figure 17-6. Node Split 752
17.3.3.3 Code Generation 754
17.4 Decompressor Design 755
17.5 Decompress Protocol 756
EFI_DECOMPRESS_PROTOCOL 756
Protocols-DeviceI/OProtocol 761
18.2 DEVICE_IO Protocol 762
DEVICE_IO Protocol 762
DEVICE_IO.Map() 768
DEVICE_IO.AllocateBuffer() 771
19.1 Overview 775
19.1.2 OS Independent 776
19.1.3 EFI Compliant 776
19.1.5 Relocatable Image 776
19.2 Memory Ordering 777
19.4 Natural Indexing 779
19.4.3 Constant 780
19.4.4 Natural Units 780
19.5.1 Direct Operands 781
19.5.2 Indirect Operands 781
19.5.4 Immediate Operands 782
19.6 EBC Instruction Syntax 783
19.7 Instruction Encoding 783
19.8 EBC Instruction Set 785
SYNTAX: 786
DESCRIPTION: 786
OPERATION: 786
BEHAVIORS AND RESTRICTIONS: 786
DESCRIPTION 789
BEHAVIOR AND RESTRICTIONS: 793
OPERATION 822
STORESP 832
19.9.1 Calling Outside VM 835
19.9.2 Calling Inside VM 835
19.9.3 Parameter Passing 835
19.9.4 Return Values 835
19.9.5 Binary Format 835
EFI_EBC_PROTOCOL 837
19.12 EBC Tools 844
19.12.8 Function Returns 845
19.12.10 Thunking 846
19.12.11 EBC Linker 848
19.12.12 Image Loader 848
19.12.13 Debug Support 848
19.13 VM Exception Handling 849
19.14 Option ROM Formats 850
Appendix A 851
GUID and Time Formats 851
A-2 12/01/02 Version 1.10 852
Appendix B 853
Console 853
B.2 SIMPLE_TEXT_OUTPUT 854
SIMPLE_TEXT_OUTPUT 855
Version 1.10 12/01/02 B-4 856
C.1 Example Computer System 857
C.2 Legacy Floppy 858
C.3 IDE Disk 859
C.5 ACPI Terms 862
Device Path Examples 863
Version 1.10 12/01/02 C-7 863
C-8 12/01/02 Version 1.10 864
Appendix D 865
Status Codes 865
Appendix E 867
32/64-Bit UNDI Specification 867
E.1.3 OS Network Stacks 871
Pro Con 872
E.2 Overview 873
E.2.2 UNDI Command Format 879
E.3 UNDI C Definitions 881
E.3.1.3 PXE_BUSTYPE 882
E.3.1.4 PXE_SWAP_UINT16 882
E.3.1.5 PXE_SWAP_UINT32 883
E.3.1.6 PXE_SWAP_UINT64 883
E.3.2 Miscellaneous Macros 884
E.3.2.1 Miscellaneous 884
E.3.3 Portability Types 884
E.3.3.1 PXE_CONST 884
E.3.3.2 PXE_VOLATILE 884
E.3.4 Simple Types 886
E.3.4.1 PXE_BOOL 886
E.3.4.2 PXE_OPCODE 886
E.3.4.3 PXE_OPFLAGS 887
E.3.4.4 PXE_STATFLAGS 892
E.3.4.5 PXE_STATCODE 896
E.3.4.6 PXE_IFNUM 896
E.3.4.7 PXE_CONTROL 897
E.3.4.8 PXE_FRAME_TYPE 897
E.3.4.9 PXE_IPV4 897
E.3.4.10 PXE_IPV6 897
E.3.4.11 PXE_MAC_ADDR 897
E.3.4.12 PXE_IFTYPE 898
E.3.5 Compound Types 899
E.3.5.1 PXE_HW_UNDI 899
E.3.5.2 PXE_SW_UNDI 901
E.3.5.3 PXE_UNDI 901
E.3.5.4 PXE_CDB 902
E.3.5.5 PXE_IP_ADDR 903
E.3.5.6 PXE_DEVICE 903
E.4 UNDI Commands 904
Figure E-7. Linked CDBs 905
Figure E-8. Queued CDBs 906
E.4.2 Get State 907
E.4.2.1 Issuing the Command 907
E.4.3 Start 909
E.4.3.1 Issuing the Command 909
Preparing the CPB 910
E.4.4 Stop 914
E.4.4.1 Issuing the Command 914
E.4.5 Get Init Info 915
E.4.5.1 Issuing the Command 915
StatFlags 916
E.4.6 Get Config Info 919
E.4.6.1 Issuing the Command 919
E.4.7 Initialize 922
E.4.7.1 Issuing the Command 922
Before Using the DB 925
E.4.8 Reset 926
E.4.8.1 Issuing the Command 926
E.4.9 Shutdown 928
E.4.9.1 Issuing the Command 928
E.4.10 Interrupt Enables 930
E.4.11 Receive Filters 932
E.4.12 Station Address 935
E.4.13 Statistics 937
E.4.14 MCast IP To MAC 940
E.4.15 NvData 942
Bulk NvData CPB 943
E.4.16 Get Status 945
Using the DB 947
E.4.17 Fill Header 948
Fragmented Frame 949
E.4.18 Transmit 951
OpFlags 952
Nonfragmented Frame 952
E.4.19 Receive 955
Appendix F 959
Appendix G 961
G-4 12/01/02 Version 1.10 964
Appendix H 965
Compression Source Code 965
Appendix I 993
Decompression Source Code 993
Appendix J 1009
Opcode Summary 1009
Appendix K 1011
Alphabetic Function Lists 1011
RegisterPeriodicCallback() 1016
RegisterExceptionCallback() 1016
References 1043
ACPI Specification 1047
WfM Specification 1047
Glossary 1049
Glossary 1051
Index 1069

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