Intel Extensible Firmware Interface

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Extensible Firmware Interface Specification

38 12/12/00 Version 1.02

Description

The SetTimer() function cancels any previous time trigger setting for the event, and sets the

new trigger time for the event. This function can only be used on events of type EVT_TIMER.

Status Codes Returned

EFI_SUCCESS The event has been set to be signaled at the requested time.

EFI_INVALID_PARAMETER

Event or Type is not valid.

Main Page

Default Chapter3
- Revision History3
- Table of Contents5
Tables20
- Overview20
  - Organization of EFI Specification20
1 Introduction21
- Goals21
- Target Audience23
- Related Information24
- Prerequisite Specifications26
  - ACPI Specification26
  - Wfm Specification26
- EFI Design Overview27
- Figures28
- Migration Requirements29
- Conventions Used in this Document30
- Guidelines for Use of the Term "Extensible Firmware Interface30
2 Overview32
Boot Manager32
- Firmware Core32
  - EFI Services32
- EFI Runtime Services33
- Calling Conventions34
- Protocols37
- Requirements39
- TPL Usage45
- TPL Restrictions46
3 Services47
- Memory Allocation Functions60
- Memory Allocation Services60
- Memory Type Usage before Exitbootservices()61
- Memory Type Usage after Exitbootservices()62
- Protocol Handler Services73
- Protocol Interface Functions73
- Image Services85
- Image Type Differences Summary85
- Image Functions86
- Variable Services Functions95
- Time Services Functions102
- Virtual Memory Functions109
- Miscellaneous Services Functions113
4 EFI Image123
- LOADED_IMAGE Protocol123
  - Loaded_Image.unload()126
- EFI Image Header127
- EFI Applications128
- EFI os Loaders128
- EFI Drivers128
  - EFI Image Handoff State129
    - IA-32 Handoff State133
- Stack after Imageentrypoint Called, IA-32133
  - Handoff State, Itanium-Based Operating Systems134
- Stack after Imageentrypoint Called, Itanium-Based Systems134
- Device Path Overview135
Device Path Protocol135
- EFI_DEVICE_PATH Protocol136
- Device Path Nodes137
- Generic Device Path Node Structure137
  - Hardware Device Path138
- Generic Device Path Structures137
- Device Path End Structure138
- PCCARD Device Path139
- PCI Device Path139
- Controller Device Path140
  - Messaging Device Path141
- Memory Mapped Device Path140
- Vendor Device Path140
- Vendor-Defined Device Path140
- ACPI Device Path141
- ATAPI Device Path142
- Fibre Channel Device Path142
- SCSI Device Path142
- 1394 Device Path143
- USB Device Path143
- I O Device Path144
- MAC Address Device Path144
- USB Class Device Path144
- Ipv4 Device Path145
- Ipv6 Device Path145
- Infiniband † Device Path146
- UART Device Path146
  - Media Device Path147
    - Hard Drive147
- Vendor-Defined Messaging Device Path147
- Hard Drive Media Device Path148
- CD-ROM Media Device Path149
  - Media Protocol Device Path150
- Vendor-Defined Media Device Path149
- File Path Media Device Path150
- Media Protocol Media Device Path150
- BIOS Boot Specification Device Path151
  - Rules with ACPI _HID and _UID152
- Device Path Generation Rules151
  - Housekeeping Rules151
- ACPI _CRS to EFI Device Path Mapping152
  - Rules with ACPI _ADR153
  - Hardware Vs. Messaging Device Path Rules153
- ACPI _ADR to EFI Device Path Mapping153
  - Media Device Path Rules154
  - Other Rules154
6 Device I/O Protocol155
- Device I/O Overview155
- DEVICE_IO Protocol155
  - Device_Io.mem(), .Io(), and .Pci()159
- PCI Address160
7 Console I/O Protocol169
- Console I/O Overview169
- Consolein Definition170
- EFI Scan Codes for SIMPLE_INPUT_INTERFACE170
- Supported Unicode Control Characters170
- SIMPLE_INPUT Protocol172
  - Simple_Input.reset()173
  - Simple_Input.readkeystroke174
- Consoleout or Standarderror175
- SIMPLE_TEXT_OUTPUT Protocol175
8 Block I/O Protocol191
- BLOCK_IO Protocol191
9 Disk I/O Protocol201
- DISK_IO Protocol201
  - Efi_Disk_Io.readdisk()203
  - Efi_Disk_Io.writedisk()204
10 File System Protocol205
- Simple File System Protocol205
  - Efi_File_Io_Interface.openvolume()207
- EFI_FILE Protocol208
11 Load File Protocol227
- LOAD_FILE Protocol227
  - Load_File.loadfile()228
12 Serial I/O Protocol231
- SERIAL_IO Protocol231
13 Unicode Collation Protocol243
- UNICODE_COLLATION Protocol243
14 PXE Base Code Protocol35253
- EFI_PXE_BASE_CODE Protocol253
- PXE Tag Definitions for EFI263
- Destination IP Filter Operation282
- Destination UDP Port Filter Operation282
- Source IP Filter Operation283
- Source UDP Port Filter Operation283
- EFI_PXE_BASE_CODE_CALLBACK Protocol291
  - Efi_Pxe_Base_Code_Callback.callback()292
15 Simple Network Protocol295
- EFI_SIMPLE_NETWORK Protocol295
- NETWORK_INTERFACE_IDENTIFIER Protocol320
- System Partition323
File System Format323
- Directory Structure324
- File Names324
- Partition Discovery326
- Nesting of Legacy MBR Partition Records326
  - EFI Partition Header327
- GUID Partition Table (GPT) Scheme328
- GUID Partition Table Header329
- GUID Partition Entry330
- Defined GUID Partition Entry - Attributes331
- Defined GUID Partition Entry - Partition Type Guids331
  - ISO-9660 and el Torito332
  - Legacy Master Boot Record332
- Legacy Master Boot Record333
  - Legacy Master Boot Record and GPT Partitions334
- Legacy Master Boot Record Partition Record333
- PMBR Entry to Precede a GUID Partition Table Header334
- Global Variables341
  - Boot Option Variables Default Behavior343
    - Boot Via Simple File Protocol343
    - Removable Media Boot Behavior343
  - Boot Mechanisms343
- EFI Image Types344
- Standard PCI Expansion ROM Header345
- EFI PCI Expansion ROM Header346
- PCI Data Structure346
E Alphabetic Function Lists377
F Glossary377
- G-1. Definitions391
- G.1 Introduction391
- G.1.1 Definitions391
- G-2. Referenced Specification392
- G.1.2 Referenced Specifications392
- G-1. Network Stacks with Three Classes of Drivers394
- G.1.3 os Network Stacks394
- G-3. Driver Types: Pros and Cons395
- G-2. !PXE Structures for H/W and S/W UNDI396
- G.2 Overview396
- G.2.1 32/64-Bit UNDI Interface396
- G-4. !PXE Structure Field Definitions397
- Issuing UNDI Commands401
  - G-4. UNDI Command Descriptor Block (CDB)402
  - G-5. UNDI CDB Field Definitions402
  - G.2.2 UNDI Command Format402
  - G.3 UNDI C Definitions404
  - G.3.1 Portability Macros404
  - G.3.2 Miscellaneous Macros408
  - G.3.3 Portability Types408
- Storage Types408
  - G.3.4 Simple Types410
  - G.3.5 Compound Types427
  - G-6. UNDI States, Transitions & Valid Commands434
  - G.4 UNDI Commands434
  - G.4.1 Command Linking & Queuing435
- Linked Cdbs435
- G.4.2 Get State436
- Queued Cdbs436
  - G.4.3 Start438
  - G.4.4 Stop440
  - G.4.5 Get Init Info441
  - G.4.6 Get Config Info445
  - G.4.7 Initialize448
  - G.4.8 Reset452
  - G.4.9 Shutdown453
- G.4.10 Interrupt Enables455
- G.4.11 Receive Filters457
- G.4.12 Station Address460
- G.4.13 Statistics462
- G.4.14 Mcast IP to MAC466
- G.4.15 Nvdata467
- G.4.16 Get Status472
- G.4.17 Fill Header474
  - G.4.18 Transmit478
  - G.4.19 Receive482
- UNDI as an EFI Runtime Driver484
Index487

Intel Extensible Firmware Interface - Page 56

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