6. Status Codes¶

6.1. Status Codes Overview¶

This specification defines the status code architecture that is required for an implementation of the Platform Initialization (PI) specifications (hereafter referred to as the “PI Architecture”). Status codes enable system components to report information about their current state. This specification does the following:

Describes the basic components of status codes
Defines the status code classes; their subclasses; and the progress, error, and debug code operations for each
Provides code definitions for the data structures that are common to all status codes
Provides code definitions for the status code classes; subclasses; progress, error, and debug code enumerations; and extended error data that are architecturally required by the PI Architecture.

The basic definition of a status code can be found in the Terms section.

6.1.1. Organization of the Status Codes Specification¶

This specification is organized as listed below. Because status codes are just one component of a PI Architecture-based firmware solution, there are a number of references to the PI Specifications throughout this document.

Table 6.2 Organization of This Specification¶
Book	Description
Status Codes Overview	Provides a high level explanation of status codes and the status code classes and subclasses that are defined in this specification
Status Code Classes	Provides detailed explanations of the defined status code classes
Code Definitions	Provides the code definitions for all status code classes subclasses extended error data structures and progress error and debug code enumerations that are included in this specification

6.2. Terms¶

The following terms are used throughout this document:

debug code¶: Data produced by various software entities that contains information specifically intended to assist in debugging. The format of the debug code data is governed by this specification.
error code¶: Data produced by various software entities that indicates an abnormal condition. The format of the error code data is governed by this specification.
progress code¶: Data produced by various software entities that indicates forward progress. The format of the progress code data is governed by this specification.
status code¶: One of the three types of codes: progress code, error code, or debug code.
status code driver¶: The driver that produces the Status Code Runtime Protocol (EFI_STATUS_CODE_PROTOCOL). The status code driver receives status codes and notifies registered listeners upon receipt. Status codes handled by this driver are different from the EFI_STATUS returned by various functions. The term EFI_STATUS is defined in the UEFI Specification.

6.3. Types of Status Codes¶

For each entity classification (class/subclass pair) there are three sets of operations:

Progress codes
Error codes
Debug codes

For progress codes, operations correspond to activities related to the component classification. For error codes, operations correspond to exception conditions (errors). For debug codes, operations correspond to the basic nature of the debug information.

The values 0x00-0x0FFF are common operations that are shared by all subclasses in a class. There are also subclass-specific operations/error codes. Out of the subclass-specific operations, the values 0x1000-0x7FFF are reserved by this specification. The remaining values (0x8000-0xFFFF) are not defined by this specification and OEMs can assign meaning to values in this range. The combination of class and subclass operations provides the complete set of operations that may be reported by an entity. The figure below demonstrates the hierarchy of class and subclass and progress, error, and debug operations.

_images/V3_Status_Codes-2.png — Fig. 6.1 Hierarchy of Status Code Operations¶

The organization of status codes, progress versus error, class, subclass, and operation facilitate a flexible reporting of status codes. In the simplest case, reporting the status code might only convey that an event occurred. In a slightly more complex system, it might be possible to report the class and if it is a progress, error, or debug Code. In such a case, it is at least possible to understand that the system is executing a software activity or that an error occurred with a computing unit. If more reporting capability is present, the error could be isolated to include the subclass–for example, an error occurred related to memory, or the system is currently executing the PEI Foundation software. If yet more capability is present, information about the type of error or activity is available–for example, single-bit ECC error or PEIM dispatch in progress. If the reporting capability is complete, it can provide the detailed error information about the single-bit ECC error, including the location and a string describing the failure. A large spectrum of consumer capability can be supported with a single interface for the producers of progress and error information.

6.3.1. Status Code Classes¶

The PI architecture defines four classes of status codes–three classes for hardware and one class for software. These classes are listed in the table below and described in detail in the rest of this section. Each class is made up of several subclasses, which are also defined later in this section.

See Code Definitions for all the definitions of all data types and enumerations listed in this section.

Table 6.3 Class Definitions¶
Type of Class	Class Name	Date Type Name
Hardware	Computing Unit	EFI_COMPUTING_UNIT
	User-Accessible Peripheral	EFI_PERIPHERAL
	I/O Bus	EFI_IO_BUS
Software	Host Software	EFI_SOFTWARE

Class/subclass pairing should be able to classify any system entity, whether software or hardware. For example, the boot-strap processor (BSP) in a system would be a member of the computing unit class and host processor subclass, while a graphics processor would also be a member of the computing unit class, but a member of the I/O processor subclass.

6.3.2. Instance Number¶

Because a system may contain multiple entities matching a class/subclass pairing, there is an instance number. Instance numbers have different meanings for different classes. However, an instance number of 0xFFFFFFFF always indicates that instance information is unavailable, not applicable, or not provided.

Valid instance numbers start from 0. So a 4-processor server would logically have four instances of the class/subclass pairing, computing unit/host processor, instance numbers 0 to 3.

Due to the complexity of system design, it is outside of the scope of this specification how to pair instance numbers with the actual component–for instance, determining which processor is number 3. However, this specification mandates that the numbering be consistent with the other agents in the system. For example, the processor numbering scheme that is followed by status codes must be consistent with the one followed by the ACPI tables.

6.4. Hardware Classes¶

6.4.1. Computing Unit Class¶

The Computing Unit class covers components directly related to system computational capabilities. Subclasses correspond to types of computational devices and resources. See the following for the computing unit class:

Instance Number
Progress Code Operations
Error Code Operations
Defined Subclasses

6.4.1.1. Instance Number¶

The instance number refers to the computing unit’s geographic location in some manner. An instance number of 0xFFFFFFFF means that the instance number information is not available or the provider of the information is not interested in providing the instance number.

6.4.1.2. Progress Code Operations¶

All computing unit subclasses share the operation codes listed in the table below. See Progress Code Definitions in Code Definitions: Computing Unit Class for the definitions of these progress codes.

Table 6.4 Progress Code Operations: Computing UnitClass¶
Operation	Description	Extended Data
EFI_CU_PC_INIT_BEGIN	General computing unit initialization begins. No details regarding operation are made available.	See subclass.
EFI_CU_PC_INIT_END	General computing unit initialization ends. No details regarding operation are made available.	See subclass.
0x0002 0x0FFF	Reserved for future use by this specification for Computing Class progress codes.	NA
0x1000 0x7FFF	Reserved for subclass use. See the subclass definitions within this specification for value definitions.	NA
0x8000 0xFFFF	Reserved for OEM use.	OEM defined.

6.4.1.3. Error Code Operations¶

All computing unit subclasses share the error codes listed in the table below. See Error Code Definitions in Computing Unit Class for the definitions of these error codes.

Table 6.5 Error Code Operations: Computing Unit Class¶
Operation	Description	Extended Data
EFI_CU_EC_NON_SPECIFIC	No error details available.	See subclass.
EFI_CU_EC_DISABLED	Instance is disabled.	See subclass.
EFI_CU_EC_NOT_SUPPORTED	Instance is not supported.	See subclass.
EFI_CU_EC_NOT_DETECTED	Instance not detected when it was expected to be present.	See subclass.
E FI_CU_EC_NOT_CONFIGURED	Instance could not be properly or completely initialized or configured.	See subclass.
0x0005 0x0FFF	Reserved for future use by this specification for Computing Class error codes.	NA
0x1000 0x7FFF	Subclass defined: See the subclass definitions within this specification.	NA
0x8000 0xFFFF	Reserved for OEM use.	OEM defined.

6.4.1.4. Subclasses¶

6.4.1.4.1. Defined Subclasses¶

The table below lists the subclasses in the Computing Unit class. The following topics describe each subclass in more detail. See Subclass Definitions in Code Definitions: Computing Unit Class for the definitions of these subclasses.

Table 6.6 Computing Unit Class: Subclasses¶
Subclass	Code Name	Description
Unspecified	EFI_COMPUTING_UNIT_UNSPECIFIED	The computing unit type is unknown, undefined, or unspecified.
Host processor	EFI_COMPUTING_UNIT _HOST_PROCESSOR	The computing unit is a full-service central processing unit.
Firmware processor	EFI_COMPUTING_UNIT _FIRMWARE_PROCESSOR	The computing unit is a limited service processor, typically designed to handle tasks of limited scope.
I O processor	EFI_COMPUTING_UNIT _IO_PROCESSOR	The computing unit is a processor designed specifically to handle I/O transactions.
Cache	EFI _COMPUTING_UNIT_CACHE	The computing unit is a cache. All types of cache qualify.
Memory	EFI_COMPUTING_UNIT_MEMORY	The computing unit is memory. Many types of memory qualify.
Chipset	EFI_COMPUTING_UNIT_CHIPSET	The computing unit is a chipset component.
0x07 0x7F	Reserved for future use by this specification.
0x80 0xFF	Reserved for OEM use.

6.4.1.4.2. Unspecified Subclass¶

This subclass can be used for any computing unit type of component that does not belong in one of the other subclasses.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Computing Unit class, the table below lists the additional codes for this subclass.

Table 6.7 Progress and Error Code Operations: Computing Unit Unspecified Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000 0x7FFF	Reserved for future use by this specification.	NA
Error	0x1000 0x7FFF	Reserved for future use by this specification.	NA

Related Definitions

None.

6.4.1.4.3. Host Processor Subclass¶

This subclass is used for computing units that provide the system’s main processing power and their associated hardware. These are general-purpose processors capable of a wide range of functionality. The instance number matches the processor handle number that is assigned to the processor by the Multiprocessor (MP) Services Protocol. They often contain multiple levels of embedded cache.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code operations

In addition to the standard progress and error codes that are defined for the Computing Unit class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.8 Progress and Error Code Operations: HostProcessor Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_CU_HP_PC_POWER_ON_INIT	Power-on initialization	None
	EFI_CU_HP_PC_CACHE_INIT	Embedded cache initialization including cache controller hardware and cache memory.	EFI_CACHE_INIT_DATA
Progress (cont.)	EFI_CU_HP_PC_RAM_INIT	Embedded RAM initialization	None
	EFI_CU_HP_PC_MEMORY _CONTROLLER_INIT	Embedded memory controller initialization	None
	EFI_CU_HP_PC_IO_INIT	Embedded I/O complex initialization	None
	EFI_CU_HP_PC_BSP_SELECT	BSP selection	None
	EFI_CU_HP_PC_BSP_RESELECT	BSP reselection	None
	EFI_CU_HP_PC_AP_INIT	AP initialization (this operation is performed by the current BSP)	None
	EFI_CU_HP_PC_SMM_INIT	SMM initialization	None
	0x000B-0x7FFF	Reserved for future use by this specification	NA
Error	EFI _CU_EC_DISABLED	Instance is disabled. This is a standard error code for this class.	EFI_COMPUTING_UNIT _CPU_DISABLED _ERROR_DATA
	EFI_CU_HP_EC _INVALID_TYPE	Instance is not a valid type.	None
	EFI_CU_HP_EC _INVALID_SPEED	Instance is not a valid speed.	None
	EFI_CU_HP_EC_MISMATCH	Mismatch detected between two instances.	EFI_HOST_PROCESSOR _MISMATCH_ERROR_DATA
	EFI_CU_HP_EC _TIMER_EXPIRED	A watchdog timer expired.	None
	EFI_CU_HP_EC_SELF_TEST	Instance detected an error during BIST.	None
	EFI_CU_HP_EC_INTERNAL	Instance detected an IERR.	None
	EFI_CU_HP_EC_THERMAL	An over temperature condition was detected with this instance.	EFI_COMPUTING_UNIT _THERMAL_ERROR_DATA
Error (cont.)	EFI_CU_HP_EC _LOW_VOLTAGE	Voltage for this instance dropped below the low voltage threshold.	EFI_COMPUTING_UNIT _VOLTAGE_ERROR_DATA
	EFI_CU_HP_EC_HIGH_VOLTAGE	Voltage for this instance surpassed the high voltage threshold.	EFI_COMPUTING_UNIT _VOLTAGE_ERROR_DATA
	EFI _CU_HP_EC_CACHE	The instance suffered a cache failure.	None
	EFI_CU_HP_EC _MICROCODE_UPDATE	Instance microcode update failed.	EFI_COMPUTING_UNIT _MICROCODE_UPDATE_ERROR_DATA
	EFI_CU_HP_EC_CORRECTABLE	Correctable error detected.	None
	EFI_CU_HP_EC _UNCORRECTABLE	Uncorrectable ECC error detected.	None
	EF I_CU_HP_EC_NO._MICROCODE_UPDATE	No matching microcode update is found.	None
	0x100D 0x7FFF	Reserved for future use by this specification	NA

Related Definitions

See the following topics in Subclass Definitions for definitions of the subclass-specific operations:

Progress Code Definitions
Error Code Definitions

See Extended Error Data in Computing Unit Class for definitions of the extended error data.

6.4.1.4.4. Firmware Processor Subclass¶

This subclass applies to processors other than the Host Processors that provides services to the system.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Computing Unit class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.9 Progress and Error Code Operations:Service Processor Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000 0x7FFF	Reserved for future use by this specification.	NA
Error	EFI_CU_FP_EC_HARD_FAIL	Firmware processor detected a hardware error during initialization.	None
	EFI_CU_FP_EC_SOFT_FAIL	Firmware processor detected an error during initialization. E.g. Firmware processor NVRAM contents are invalid.	None
	EFI_CU_FP_EC_COMM_ERROR	The host processor encountered an error while communicating with the firmware processor.	None
	0x1004 0x7FFF	Reserved for future use by this specification.	NA

Related Definitions

See the following topics in Computing Unit Class for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

6.4.1.4.5. I/O Processor Subclass¶

This subclass applies to system I/O processors and their associated hardware. These processors are typically designed to offload I/O tasks from the central processors in the system. Examples would include graphics or I20 processors. The subclass is identical to the host processor subclass. See Host Processor Subclass for more information.

See Host Processor Subclass for the definition of this subclass.

6.4.1.4.6. Cache Subclass¶

The cache subclass applies to any external/system level caches. Any cache embedded in a computing unit would not be counted in this subclass, but would be considered a member of that computing unit subclass.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Computing Unit class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.10 Progress and Error Code Operations: CacheSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_CU_CACHE_PC_PRESENCE_DETECT	Detecting cache presence.	None
	EFI_CU_CACHE_PC_CONFIGURATION	Configuring cache.	None
	0x1002 0x7FFF	Reserved for future use by this specification.	NA
Error	EFI_CU_CACHE_EC_INVALID_TYPE	Instance is not a valid type.	None
	EFI_CU_CACHE_EC_INVALID_SPEED	Instance is not a valid speed.	None
	EFI_CU_CACHE_EC_INVALID_SIZE	Instance size is invalid.	None
	EFI_CU_CACHE_EC_MISMATCH	Instance does not match other caches.	None
	0x1004-0x7FFF	Reserved for future use by this specification.	NA

Related Definitions

See the following topics in Computing Unit Class for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

6.4.1.4.7. Memory Subclass¶

The memory subclass applies to any external/system level memory and associated hardware. Any memory embedded in a computing unit would not be counted in this subclass, but would be considered a member of that computing unit subclass.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Computing Unit class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

For all operations and errors, the instance number specifies the DIMM number unless stated otherwise. Some of the operations may affect multiple memory devices and multiple memory controllers. The specification provides mechanisms (EFI_MULTIPLE_MEMORY_DEVICE_OPERATION and others) to describe such group operations. See EFI_STATUS_CODE_DIMM_NUMBER in Computing Unit Class for details.

Table 6.11 Progress and Error Code Operations: MemorySubclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_CU_MEMORY_PC_SPD_READ	Reading configuration data (e.g. SPD) from memory devices.	None
	EFI_CU_MEMORY_PC _PRESENCE_DETECT	Detecting presence of memory devices (e.g. DIMMs).	None
	EFI_CU_MEMORY_PC_TIMING	Determining optimum configuration e.g. timing for memory devices.	None
	EFI_CU_MEMORY_PC_CONFIGURING	Initial configuration of memory device and memory controllers.	None
	EFI_CU_MEMORY_PC_OPTIMIZING	Programming the memory controller and memory devices with optimized settings.	None
Progress (cont.)	EFI_CU_MEMORY_PC_INIT	Memory initialization such as ECC initialization.	EFI_MEMORY _RANGE _EXTENDED_DATA
	EFI_CU_MEMORY_PC_TEST	Performing memory test.	EFI_MEMORY _RANGE _EXTENDED_DATA
	0x1007-0x7FFF	Reserved for future use by this specification	NA
Error	EFI_CU_MEMORY _EC_INVALID_TYPE	Instance is not a valid type.	None
	EFI_CU_MEMORY _EC_INVALID_SPEED	Instance is not a valid speed.	None
	EFI_CU_MEMORY _EC_CORRECTABLE	Correctable error detected.	EFI_MEMORY _EXTENDED _ERROR_DATA
	EFI_CU_MEMORY _EC_UNCORRECTABLE	Uncorrectable error detected. This included memory miscomparisions during the memory test.	EFI_MEMORY _EXTENDED _ERROR_DATA
	EFI_CU_MEMORY _EC_SPD_FAIL	Instance SPD failure detected.	None
	EFI_CU_MEMORY _EC_INVALID_SIZE	Instance size is invalid.	None
	EFI_CU_MEMORY _EC_MISMATCH	Mismatch detected between two instances.	EFI_MEMORY _MODULE _MISMATCH _ERROR_DATA
	E FI_CU_MEMORY_EC _S3_RESUME_FAIL	Resume from S3 failed.	None
	EFI_CU_MEMORY _EC_UPDATE_FAIL	Flash Memory Update failed.	None
	EFI_CU_MEMORY _EC_NONE_DETECTED	Memory was not detected in the system. Instance field is ignored.	None
Error cont	EFI_CU_MEMORY _EC_NONE_USEFUL	No useful memory was detected in the system. E.g., Memory was detected but cannot be used due to errors. Instance field is ignored.	None
	0x1009-0x7FFF	Reserved for future use by this specification.	NA

Related Definitions

See the following topics in Computing Unit Class for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

See Extended Data Formats for definitions of the extended error data listed above.

6.4.1.4.8. Chipset Subclass¶

This subclass can be used for any chipset components and their related hardware.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Computing Unit class, the table below lists the additional codes for this subclass.

Table 6.12 Progress and Error Code Operations:Chipset Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_CHIPSET_PC_PEI_CAR_SB_INIT	South Bridge initialization prior to memory detection	None
	EFI_CHIPSET_PC_PEI_CAR_NB_INIT	North Bridge initialization prior to memory detection	None
	EFI_CHIPSET_PC_PEI_MEM_SB_INIT	South Bridge initialization after memory detection	None
	EFI_CHIPSET_PC_PEI_MEM_NB_INIT	North Bridge initialization after memory detection	None
	EFI_CHIPSET_PC_DXE_HB_INIT	PCI Host Bridge DXE initialization	None
	EFI_CHIPSET_PC_DXE_NB_INIT	North Bridge DXE initialization	None
	EFI_CHIPSET_PC_DXE_NB_SMM_INIT	North Bridge specific SMM initialization in DXE	None
	EFI_CHIPSET_PC_DXE_SB_RT_INIT	Initialization of the South Bridge specific UEFI Runtime Services	None
	EFI_CHIPSET_PC_DXE_SB_INIT	South Bridge DXE initialization	None
	EFI_CHIPSET_PC_DXE_SB_SMM_INIT	South Bridge specific SMM initialization in DXE	None
	EFI_CHIPSET_PC_DXE _SB_DEVICES_INIT	Initialization of the South Bridge devices	None
Progress	0x100B-0x7FFF	Reserved for future use by this specification	NA
Error	EFI_CHIPSET_EC_BAD_BATTERY	Bad battery status has been detected	None
	EFI_CHIPSET_EC_DXE_NB_ERROR	North Bridge initialization error in DXE	None
	EFI_CHIPSET_EC_DXE_NB_ERROR	South Bridge initialization error in DXE	None
	EFI_CHIPSET_EC_INTRUDER_DETECT	Physical access to inner system components that are not accessible during normal system operation is detected	None
Error	0x1004-0x7FFF	Reserved for future use by this specification

Related Definitions

None.

6.4.2. User-Accessible Peripheral Class¶

The User-Accessible Peripheral class refers to any peripheral with which the user interacts. Subclass elements correspond to general classes of peripherals. See the following for the User-Accessible Peripheral class:

instance number
progress code operations
error code operations
defined subclasses

6.4.2.1. Instance Number¶

The instance number refers to the peripheral’s geographic location in some manner. Instance number of 0 means that instance number information is not available or the provider of the information is not interested in providing the instance number.

6.4.2.2. Progress Code Operations¶

All peripheral subclasses share the operation codes listed in the table below. See Progress Code Definitions for the definitions of these progress codes.

Table 6.13 Progress Code Operations: User-AccessiblePeripheral Class¶
Operation	Description	Extended Data
EFI_P_PC_INIT	General Initialization. No details regarding operation are made available.	See subclass
EFI_P_PC_RESET	Resetting the peripheral.	See subclass
EFI_P_PC_DISABLE	Disabling the peripheral.	See subclass
EFI_P_PC _PRESENCE_DETECT	Detecting the presence.	See subclass
EFI_P_PC_ENABLE	Enabling the peripheral.	See subclass
EFI_P_PC_RECONFIG	Reconfiguration.	See subclass
EFI_P_PC_DETECTED	Peripheral was detected.	See subclass
EFI_P_PC_REMOVED	Peripheral was unplugged, ejected, or otherwise removed from the system.	See subclass
0x0007 0x0FFF	Reserved for future use by this specification for Peripheral Class progress codes.	NA
0x1000-0x7FFF	Reserved for subclass use. See the subclass definitions within this specification for value definitions.	See subclass
0x8000-0xFFFF	Reserved for OEM use.	NA

6.4.2.3. Error Code Operations¶

All peripheral subclasses share the error codes listed in the table below. See User-Accessible Peripherals Class for the definitions of these error codes.

Table 6.14 Error Code Operations: User-AccessiblePeripheral Class¶
Operation	Description	Extended Data
EFI_P_EC_NON_SPECIFIC	No error details available	See subclass
EFI_P_EC_DISABLED	Instance is disabled	See subclass
EFI_P_EC _NOT_SUPPORTED	Instance is not supported	See subclass
EFI_P_EC _NOT_DETECTED	Instance not detected when it was expected to be present	See subclass
EFI_P_EC _NOT_CONFIGURED	Instance could not be properly or completely initialized or configured	See subclass
EFI_P_EC_INTERFACE_ERROR	An error occurred with the peripheral interface	See subclass
EFI_P_EC_CONTROLLER_ERROR	An error occurred with the peripheral controller	See subclass
EFI_P_EC_INPUT_ERROR	An error occurred getting input from the peripheral	See subclass
E FI_P_EC_OUTPUT_ERROR	An error occurred putting output to the peripheral	See subclass
EFI_P_EC_RESOURCE_CONFLICT	A resource conflict exists with this instance s resource requirements	See EFI_RESOURCE_ALLO C_FAILURE_ERROR_DATA for all subclasses
0x0006-0x0FFF	Reserved for future use by this specification for User-Accessible Peripheral class error codes	NA
0x1000-0x7FFF	See the subclass definitions within this specification	See subclass
0x8000-0xFFFF	Reserved for OEM use	NA

6.4.2.4. Subclasses¶

6.4.2.4.1. Defined Subclasses¶

The table below lists the subclasses in the User-Accessible Peripheral class. The following topics describe each subclass in more detail. See Subclass Definitions. for the definitions of these subclasses.

Table 6.15 Defined Subclasses: User-Accessible Peripheral Class¶
Subclass	Code Name	Description
Unspecified	EFI_PERIPHERAL_UNSPECIFIED	The peripheral type is unknown, undefined, or unspecified.
Keyboard	E FI_PERIPHERAL_KEYBOARD	The peripheral referred to is a keyboard.
Mouse	EFI_PERIPHERAL_MOUSE	The peripheral referred to is a mouse.
Local console	EFI_PERIPHERAL_LOCAL_CONSOLE	The peripheral referred to is a console directly attached to the system.
Remote console	EFI_PERIPHERAL_REMOTE_CONSOLE	The peripheral referred to is a console that can be remotely accessed.
Serial port	EFI_PERIPHERAL_SERIAL_PORT	The peripheral referred to is a serial port.
Parallel port	EFI_PERIPHERAL_PARALLEL_PORT	The peripheral referred to is a parallel port.
Fixed media	EFI_PERIPHERAL_FIXED_MEDIA	The peripheral referred to is a fixed media device–e.g., an IDE hard disk drive.
Removable media	EFI_PERIPHERAL_REMOVABLE_MEDIA	The peripheral referred to is a removable media device–e.g., a DVD ROM drive.
Audio input	EFI_PERIPHERAL_AUDIO_INPUT	The peripheral referred to is an audio input device–e.g., a microphone.
Audio output	EFI_PERIPHERAL_AUDIO_OUTPUT	The peripheral referred to is an audio output device–e.g., speakers or headphones.
LCD device	EFI _PERIPHERAL_LCD_DEVICE	The peripheral referred to is an LCD device.
Network device	EFI_PERIPHERAL_NETWORK	The peripheral referred to is a network device–e.g., a network card.
Docking Station	EFI_PERIPHERAL_DOCKING	The peripheral referred to is a docking station.
Trusted Platform Module	EFI_PERIPHERAL_TPM	The peripheral referred to is a Trusted Platform Module
0x0F-0x7F	Reserved for future use by this specification.
0x80-0xFF	Reserved for OEM use.

6.4.2.4.2. Unspecified Subclass¶

This subclass applies to any user-accessible peripheral not belonging to any of the other subclasses.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.16 Progress and Error Code Operations: Peripheral Unspecified Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification.	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification.	NA

Related Definitions

None.

6.4.2.4.3. Keyboard Subclass¶

This subclass applies to any keyboard style interfaces. ExtendedData contains the device path to the keyboard device as defined in EFI_DEVICE_PATH_EXTENDED_DATA and the instance is ignored.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.17 Progress and Error Code Operations: Keyboard Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_P_KEYBOARD _PC_CLEAR_BUFFER	Clearing the input keys from keyboard.	The device path to the keyboard device See EFI_DEVICE_PATH _EXTENDED_DATA
	EFI_P_KEYBOARD _PC_SELF_TEST	Keyboard self test.	The device path to the keyboard device See EFI_DEVICE_PATH _EXTENDED_DATA
	0x1002-0x7FFF	Reserved for future use by this specification.	NA
Error	EFI_P_KEYBOARD _EC_LOCKED	The keyboard input is locked.	The device path to the keyboard device See EFI_DEVICE_PATH _EXTENDED_DATA
	EFI_P_KEYBOARD _EC_STUCK_KEY	A stuck key was detected.	The device path to the keyboard device See EFI_DEVICE_PATH _EXTENDED_DATA
	EFI_P_KEYBOARD _EC_BUFFER_FULL	Keyboard buffer is full.	The device path to the keyboard device See EFI_DEVICE_PATH _EXTENDED_DATA
	0x1003-0x7FFF	Reserved for future use by this specification.	NA

Related Definitions

See the following topics in User-Accessible Peripherals Class for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

See Extended Error Data in User-Accessible Peripherals Class for definitions of the extended error data listed above.

6.4.2.4.4. Mouse Subclass¶

This subclass applies to any mouse or pointer peripherals. ExtendedData contains the device path to the mouse device as defined in EFI_DEVICE_PATH_EXTENDED_DATA and the instance is ignored.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.18 Progress and Error Code Operations: MouseSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_P_MOUSE_PC _SELF_TEST	Mouse self test	The device path to the mouse device See EFI_DEVICE_PATH _EXTENDED_DATA
	0x1001-0x7FFF	Reserved for future use by this specification	NA
Error	EFI_P_MOUSE _EC_LOCKED	The mouse input is locked	The device path to the mouse device See EFI_DEVICE_PATH _EXTENDED_DATA
	0x1001-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

See the following topics in User-Accessible Peripherals Class for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

See Extended Error Data in User-Accessible Peripherals Class for definitions of the extended error data listed above.

6.4.2.4.5. Local Console Subclass¶

This subclass applies to all console devices directly connected to the system. This would include VGA/UGA devices. ExtendedData contains the device path to the console device as defined in EFI_DEVICE_PATH_EXTENDED_DATA and the instance is ignored. LCD devices have their own subclass.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.19 Progress and Error Code Operations: LocalConsole Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.2.4.6. Remote Console Subclass¶

This subclass applies to any console not directly connected to the system. This would include consoles displayed via serial or LAN Hconnections. ExtendedData contains the device path to the console device as defined in EFI_DEVICE_PATH_EXTENDED_DATA and the instance is ignored.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.20 Progress and Error Code Operations: RemoteConsole Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.2.4.7. Serial Port Subclass¶

This subclass applies to devices attached to a system serial port, such as a modem. ExtendedData contains the device path to the device as defined in EFI_DEVICE_PATH_EXTENDED_DATA and the instance is ignored.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.21 Progress and Error Code Operations: SerialPort Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_P_SERIAL_PORT _PC_CLEAR_BUFFER	Clearing the serial port input buffer	The device handle See EFI_DEVICE_PATH _EXTENDED_DATA
	0x1001-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

See the following topics in User-Accessible Peripherals Class for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

See Extended Error Data in User-Accessible Peripherals Class for definitions of the extended error data listed above.

6.4.2.4.8. Parallel Port Subclass¶

This subclass applies to devices attached to a system parallel port, such as a printer. ExtendedData contains the device path to the device as defined in EFI_DEVICE_PATH_EXTENDED_DATA and the instance is ignored.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.22 Progress and Error Code Operations:Parallel Port Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.2.4.9. Fixed Media Subclass¶

This subclass applies to fixed media peripherals such as hard drives. These peripherals are capable of producing the EFI_BLOCK_IO Protocol. ExtendedData contains the device path to the device as defined in EFI_DEVICE_PATH_EXTENDED_DATA and the instance is ignored.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.23 Progress and Error Code Operations: FixedMedia Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.2.4.10. Removable Media Subclass¶

This subclass applies to removable media peripherals such as floppy disk drives or LS-120 drives. These peripherals are capable of producing the EFI_BLOCK_IO Protocol. ExtendedData contains the device path to the device as defined in EFI_DEVICE_PATH_EXTENDED_DATA and the instance is ignored.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.24 Progress and Error Code Operations: Removable Media Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.2.4.11. Audio Input Subclass¶

This subclass applies to audio input devices such as microphones.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.25 Progress and Error Code Operations: AudioInput Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.2.4.12. Audio Output Subclass¶

This subclass applies to audio output devices like speakers or headphones.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.26 Progress and Error Code Operations: AudioOutput Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.2.4.13. LCD Device Subclass¶

This subclass applies to LCD display devices attached to the system.

See Subclass Definitions for the definition of this subclass.

Progress and Errror Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.27 Progress and Error Code Operations: LCD Device Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.2.4.14. Network Device Subclass¶

This subclass applies to network adapters attached to the system. These devices are capable of producing standard UEFI networking protocols such as the EFI_SIMPLE_NETWORK Protocol.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the User-Accessible Peripheral class, the table below lists the additional codes for this subclass.

Table 6.28 Progress and Error Code Operations: Network Device Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.3. I/O Bus Class¶

The I/O bus class covers hardware buses irrespective of any software protocols that are used. At a broad level, everything that connects the computing unit to the user peripheral can be covered by this class. Subclass elements correspond to industry-standard hardware buses. See the following for the I/O Bus class:

instance number
progress code operations
error code operations
defined subclasses

6.4.3.1. Instance Number¶

The instance number is ignored and the ExtendedData describes the device path to the controller or the device as defined in EFI_DEVICE_PATH_EXTENDED_DATA .

6.4.3.2. Progress Code Operations¶

All I/O bus subclasses share the operation codes listed in the table below. See Progress Code Definitions for the definitions of these progress codes.

Table 6.29 Progress Code Operations: I/O Bus Class¶
Operation	Description	Extended Data
EFI_IOB_PC_INIT	General initialization. No details regarding operation are made available.	The device path corresponding to the host bus controller (the controller that produces this bus). For the PCI bus, it is the PCI root bridge. The format of the device path extended data is defined in EFI_DEVICE _PATH_EXTENDED_DATA
EFI_IOB_PC_RESET	Resetting the bus. Generally, this operation resets all the devices on the bus as well.	The device path corresponding to the host controller (the controller that produces this bus) The format is defined in EFI_DEVICE _PATH_EXTENDED_DATA
EFI_IOB_PC_DISABLE	Disabling all the devices on the bus prior to enumeration.	The device path corresponding to the host controller (the controller that produces this bus). The format is defined in EFI_DEVICE _PATH_EXTENDED_DATA
EFI_IOB_PC_DETECT	Detecting devices on the bus.	The device path corresponding to the host controller (the controller that produces this bus). The format is defined in EFI_DEVICE _PATH_EXTENDED_DATA
EFI_IOB_PC_ENABLE	Configuring the bus and enabling device on the bus.	The device path corresponding to the host controller (the controller that produces this bus). The format is defined in EFI_DEVICE _PATH_EXTENDED_DATA
EFI_IOB_PC_RECONFIG	Bus reconfiguration including resource re-enumeration.	The device path corresponding to the host controller the controller that produces this bus The format is defined in EFI_DEVICE _PATH_EXTENDED_DATA
EFI_IOB_PC_HOTPLUG	A hot-plug event was detected on the bus and the hot-plugged device was initialized.	The device path corresponding to the host controller (the controller that produces this bus). The format is defined in EFI_DEVICE _PATH_EXTENDED_DATA
0x0007 0x0FFF	Reserved for future use by this specification for I/O Bus class progress codes.	NA
0x1000 0x7FFF	Reserved for subclass use. See the subclass definitions within this specification for value definitions.	NA
0x8000 0xFFFF	Reserved for OEM use.	OEM defined.

6.4.3.3. Error Code Operations¶

All I/O bus subclasses share the error codes listed in the table below. See Error Code Definitions in Error Code Operations: I/O Bus Class for the definitions of these error codes.

Table 6.30 Error Code Operations: I/O Bus Class¶
Operation	Description	Extended Data
EFI_IOB_EC_NON_SPECIFIC	No error details available.	None.
EFI_IOB_EC_DISABLED	A device is disabled due to bus-level errors.	The device path corresponding to the device. See EFI_DEVICE_PATH_EXTENDED_DATA.
EFI_IOB_EC_NOT_SUPPORTED	A device is nots upported on thisbus.	The device path corresponding to the device. See EFI_DEVICE_PATH_EXTENDED_DATA.
EFI_IOB_EC_NOT_DETECTED	Instance not detected when it was expected to be present.	The device path corresponding to the device. See EFI_DEVICE_PATH_EXTENDED_DATA.
EFI_IOB_EC_NOT_CONFIGURED	Instance could not be properly or completely initialized/configured.	The device path corresponding to the device. See EFI_DEVICE_PATH_EXTENDED_DATA.
EFI_IOB_EC_INTERFACE_ERROR	An error occurred with the bus interface.	The device path corresponding to the failing device. See EFI_DEVICE_PATH_EXTENDED_DATA.
EFI_IOB_EC_CONTROLLER_ERROR	An error occurred with the host bus controller (the controller that produces this bus).	The device path corresponding to the bus controller. See EFI_DEVICE_PATH_EXTENDED_DATA.
EFI_IOB_EC_READ_ERROR	A bus specific error occurred getting input from a device on the bus.	The device path corresponding to the failing device or the closest device path. See EFI_DEVICE_PATH_
EFI_IOB_EC_WRITE_ERROR	An error occurred putting output to the bus.	The device path corresponding to the failing device or the closest device path. See EFI_DEVICE_PATH_EXTENDED_DATA.
EFI_IOB_EC_RESOURCE_CONFLICT	A resource conflict exists with this instance’s resource requirements.	See EFI_RESOURCE_ALLOC_FAILURE ERROR_DATA.
0x000A-0x0FFF	Reserved for future use by this specification for I/O Bus class errorcodes.	NA
0x1000-0x7FFF	See the subclass definitions within this specification.	NA
0x8000-0xFFFF	Reserved for OEM use.	NA

6.4.3.4. Subclasses¶

6.4.3.4.1. Defined Subclasses¶

The table below lists the subclasses in the . The following topics describe each subclass in more detail. See Subclass Definitions for the definitions of these subclasses.

Table 6.31 Defined Subclasses: I/O Bus Class¶
Subclass	Code Name	Description
Unspecified	EF I_IO_BUS_UNSPECIFIED	The bus type is unknown undefined or unspecified
PCI	EFI_IO_BUS_PCI	The bus is a PCI bus
USB	EFI_IO_BUS_USB	The bus is a USB bus
InfiniBand architecture	EFI_IO_BUS_IBA	The bus is an IBA bus
AGP	EFI_IO_BUS_AGP	The bus is an AGP bus
PC card	EFI_IO_BUS_PC_CARD	The bus is a PC Card bus
Low pin count LPC	EFI_IO_BUS_LPC	The bus is a LPC bus
SCSI	EFI_IO_BUS_SCSI	The bus is a SCSI bus
ATA ATAPI SATA	EFI_IO_BUS_ATA_ATAPI	The bus is a ATA ATAPI bus
Fibre Channel	EFI_IO_BUS_FC	The bus is an EC bus
IP network	E FI_IO_BUS_IP_NETWORK	The bus is an IP network bus
SMBus	EFI_IO_BUS_SMBUS	The bus is a SMBUS bus
I2C	EFI_IO_BUS_I2C	The bus is an I2C bus
0x0D 0x7F	Reserved for future use by this specification
0x80 0xFF	Reserved for OEM use

6.4.3.4.2. Unspecified Subclass¶

This subclass applies to any I/O bus not belonging to any of the other I/O bus subclasses.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.32 Progress and Error Code Operations: I/OBus Unspecified Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

Related Definitions

None.

6.4.3.4.3. PCI Subclass¶

This subclass applies to PCI buses and devices. It also includes different variations of PCI bus including PCI-X and PCI Express.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.33 Progress and Error Code Operations: PCISubclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_IOB_PCI _BUS_ENUM	Enumerating buses under a root bridge.	The device path corresponding to the PCI root bridge See EFI_DEVICE_PATH _EXTENDED_DATA
	EFI_IOB_PCI _RES_ALLOC	Allocating resources to devices under a host bridge.	The host bridge handle as defined in EFI_DEVICE_HANDLE _EXTENDED_DATA
	EFI_IOB_PCI _HPC_INIT	Initializing a PCI hot-plug controller.	The device path to the controller as defined in EFI_DEVICE_PATH _EXTENDED_DATA
	0x1003-0x7FFF	Reserved for future use by this specification.	NA
Error	EFI_IOB_PCI _EC_PERR	Parity error; see PCI Specification.	The device path to the controller that generated the PERR The data format is defined in EFI_DEVICE_PATH _EXTENDED_DATA
	EFI_IOB_PCI _EC_SERR	System error; see PCI Specification.	The device path to the controller that generated the SERR The data format is defined in EFI_DEVICE_PATH _EXTENDED_DATA
	0x1002-0x7FFF	Reserved for future use by this specification.	NA

See the following topics in User-Accessible Peripherals Class for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

See Extended Error Data in I/O Bus Class for definitions of the extended error data listed above.

6.4.3.5. USB Subclass¶

This subclass applies to USB buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.34 Progress and Error Code Operations: USBSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.1. InfiniBand* Architecture Subclass¶

This subclass applies to InfiniBand* (IBA) buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.35 Progress and Error Code Operations: IBASubclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.2. AGP Subclass¶

This subclass applies to AGP buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.36 Progress and Error Code Operations: AGPSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.3. PC Card Subclass¶

This subclass applies to PC Card buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.37 Progress and Error Code Operations: PCCard Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.4. LPC Subclass¶

This subclass applies to LPC buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.38 Progress and Error Code Operations: LPCSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.5. SCSI Subclass¶

This subclass applies to SCSI buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.39 Progress and Error Code Operations: SCSISubclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.6. ATA/ATAPI/SATA Subclass¶

This subclass applies to ATA and ATAPI buses and devices. It also includes Serial ATA (SATA) buses.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.40 Progress and Error Code Operations:ATA/ATAPI/SATA Subclass¶
Type of code	Operation	Description	Extended data
Progress	EFI_IOB_ATA_BUS_SMART_ENABLE	SMART is enabled on the storage device	NA
	EFI_IOB_ATA_BUS_SMART_DISABLE	SMART is disabled on the storage device	NA
	EFI_IOB_ATA_BUS_SMART _OVERTHRESHOLD	SMART records are over threshold on the storage device	NA
	EFI_IOB_ATA_BUS_SMART _UNDERTHRESHOLD	SMART records are under threshold on the storage device	NA
	0x1004-0x7FFF	Reserved for future use by this specification	NA
Error	EFI_IOB_ATA_BUS_SMART _NOTSUPPORTED	SMART is not supported on the storage device	NA
	EFI_IOB_ATA_BUS_SMART _DISABLED	SMART is disabled on the storage device	NA
	0x1002-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.7. Fibre Channel (FC) Subclass¶

This subclass applies to Fibre Channel buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.41 Progress and Error Code Operations: FCSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.8. IP Network Subclass¶

This subclass applies to IP network buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.42 Progress and Error Code Operations: IPNetwork Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.9. 3SMBus Subclass¶

This subclass applies to SMBus buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.43 Progress and Error Code Operations: SMBusSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.4.3.5.10. I2C Subclass¶

This subclass applies to I2C buses and devices.

See Subclass Definitions for the definition of this subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the I/O Bus class, the table below lists the additional codes for this subclass.

Table 6.44 Progress and Error Code Operations: I2CSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.5. Software Classes¶

6.5.1. Host Software Class¶

The Host Software class covers any software-generated codes. Subclass elements correspond to common software types in a PI Architecture system. See the following for the Host Software class:

instance number
progress code operations
error code operations
defined subclasses

6.5.2. Instance Number¶

The instance number is not used for software subclasses unless otherwise stated.

6.5.3. Progress Code Operations¶

All host software subclasses share the operation codes listed in the table below. See Progress Code Definitions in Software Classes for the definitions of these progress codes.

Table 6.45 Progress Code Operations: Host Software Class¶
Operation	Description	Extended Data
EFI_SW_PC_INIT	General initialization. No details regarding operation are made available.	None
EFI_SW_PC_LOAD	Loading a software module in the preboot phase by using LoadImage() or an equivalent PEI service. May include a PEIM, DXE drivers, UEFI application, etc.	Handle identifying the module. There will be an instance of EFI_LOADED_IMAGE_PROTOCOL on this handle. See EFI_DEVICE_HANDLE _EXTENDED_DATA
EFI_SW_PC _INIT_BEGIN	Initializing software module by using StartImage() or an equivalent PEI service.	Handle identifying the module. There will be an instance of EFI_LOADED_IMAGE_PROTOCOL on this handle. See EFI_DEVICE_HANDLE _EXTENDED_DATA
EFI_SW_PC _INIT_END	Software module returned control back after initialization.	Handle identifying the module. There will be an instance of EFI_LOADED_IMAGE_PROTOCOL on this handle. See EFI_DEVICE_HANDLE _EXTENDED_DATA
EFI_SW_PC _AUTHENTICATE_BEGIN	Performing authentication (passwords, biometrics, etc.)	None
EFI_SW_PC _AUTHENTICATE_END	Authentication completed	None
EFI_SW_PC _INPUT_WAIT	Waiting for user input	None
EFI_SW_PC _USER_SETUP	Executing user setup	None
0x0008-0x0FFF	Reserved for future use by this specification for Host Software class progress codes.	NA
0x1000-0x7FFF	Reserved for subclass use. See the subclass definitions within this specification for value definitions.	NA
0x8000-0xFFFF	Reserved for OEM use.	NA

6.5.4. Error Code Operations¶

All host software subclasses share the error codes listed in the table below. See Error Code Definitions in Software Classes for the definitions of these progress codes.

Table 6.46 Error Code Operations: Host Software Class¶
Operation	Description	Extended Data
EFI_SW_EC_NON_SPECIFIC	No error details are available.	None
EFI_SW_EC_LOAD_ERROR	The software module load failed.	Handle identifying the module. There will be an instance of EFI_LOADED_IMAGE_PROTOCOL on this handle. See EFI_DEVICE_HANDLE_EXTENDED_DATA.
EFI_SW_EC_INVALID_PARAMETER	An invalid parameter was passed to the instance.	None.
EFI_SW_EC_UNSUPPORTED	An unsupported operation was requested.	None.
EFI_SW_EC_INVALID_BUFFER	The instance encountered an invalid buffer (too large, small, or nonexistent).	None.
EFI_SW_EC_OUT_OF_RESOURCES	Insufficient resources exist.	None.
EFI_SW_EC_ABORTED	The instance was aborted.	None.
EFI_SW_EC_ILLEGAL_SOFTWARE_STATE	The instance detected an illegal software state.	See EFI_DEBUG_ASSERT_DATA
EFI_SW_EC_ILLEGAL_HARDWARE_STATE	The instance detected an illegal hardware state.	None.
EFI_SW_EC_START_ERROR	The software module returned an error when started via StartImage() or equivalent.	Handle identifying the module. There will be an instance of EFI_LOADED_IMAGE_PROTOCOL on this handle. See EFI_DEVICE_HANDLE_EXTENDED_DATA.
EFI_SW_EC_BAD_DATE_TIME	The system date/time is invalid	None.
EFI_SW_EC_CFG_INVALID	Invalid configuration settings were detected.	None.
EFI_SW_EC_CFG_CLR_REQUEST	User requested that configuration defaults be loaded (via a physical jumper, for example).	None.
EFI_SW_EC_CFG_DEFAULT	Configuration defaults were loaded.	None.
EFI_SW_EC_PWD_INVALID	Invalid password settings were detected.	None.
EFI_SW_EC_PWD_CLR_REQUEST	User requested that the passwords be cleared (via a physical jumper, for example).	None.
EFI_SW_EC_PWD_CLEARED	Passwords were cleared.	None.
EFI_SW_EC_EVENT_LOG_FULL	System event log is full.	None.
EFI_SW_EC_WRITE_PROTECTED	The device cannot be written to.	EFI_DEVICE_PATH_EXTENDED_DATA if device path to the write protected device is available; otherwise, none.
EFI_SW_EC_FV_CORRUPTED	Corrupted Firmware Volume is detected.	EFI_DEVICE_PATH_EXTENDED_DATA if device path to the corrupted firmware volume is available; otherwise, none.
EFI_SW_EC_INCONSISTENT_MEMORY_MAP	System will reboot due to inconsistent memory maps	None
0x0015-0x00FF	Reserved for future use by this specification for Host Software class error codes.	None.
0x0100-0x01FF	Unexpected EBC exceptions.	See EFI_STATUS_CODE_EXCEP_EXTENDED_DATA.
0x0200-0x02FF	Unexpected IA-32 processor exceptions.	See EFI_STATUS_CODE_EXCEP_EXTENDED_DATA.
0x0300-0x03FF	Unexpected Itanium(r) processor family exceptions.	See EFI_STATUS_CODE_EXCEP_EXTENDED_DATA.
0x0400-0x7FFF	See the subclass definitions within this specification.
0x8000-0xFFFF	Reserved for OEM use.

6.5.5. Subclasses¶

6.5.5.1. Defined Subclasses¶

The table below lists the subclasses in the Host Software class. The following topics describe each subclass in more detail.

See Subclass Definitions for the definitions of these subclasses.

Table 6.47 Defined Subclasses: Host Software Class¶
Subclass	Code Name	Description
Unspecified	EFI_SOFTWARE_UNSPECIFIED	The software type is unknown, undefined, or unspecified.
Security SEC	EFI_SOFTWARE_SEC	The software is a part of the SEC phase.
PEI Foundation	E FI_SOFTWARE_PEI_CORE	The software is the PEI Foundation module.
PEI module	EFI _SOFTWARE_PEI_MODULE	The software is a PEIM.
DXE Foundation	E FI_SOFTWARE_DXE_CORE	The software is the DXE Foundation module.
DXE Boot Service driver	EFI_SOFTWARE_DXE _BS_DRIVER	The software is a DXE Boot Service driver. Boot service drivers are not available once ExitBootServices() is called.
DXE Runtime Service driver	EFI_SOFTWARE_DXE_RT_DRIVER	The software is a DXE Runtime Service driver. These drivers execute during runtime phase.
SMM driver	EFI _SOFTWARE _SMM_DRIVER	The software is a SMM driver.
EFI application	EFI_SOFTWARE_EFI _APPLICATION	The software is a UEFI application.
OS loader	EFI_SOFTWARE_EFI _OS_LOADER	The software is an OS loader.
Runtime (RT)	EFI_SOFTWARE_EFI_RT	The software is a part of the RT phase.
EBC exception	EFI_SOFTWARE_EBC _EXCEPTION	The status code is directly related to an EBC exception.
IA-32 exception	EFI_SOFTWARE_IA32 _EXCEPTION	The status code is directly related to an IA-32 exception.
Itanium processor family exception	EFI_SOFTWARE_IPF _EXCEPTION	The status code is directly related to an Itanium processor family exception.
x64 software exception	EFI_SOFTWARE_X64 _EXCEPTION	The status code is directly related to anx64 exception.
ARM software exception	EFI_SOFTWARE_ARM _EXCEPTION	The status code is directly related to an ARM exception whilst executing in AArch32 state.
ARM AArch64 exception	EFI_SOFTWARE_AARCH64 _EXCEPTION	The status code is directly related to an ARM exception whilst executing in AArch64 state.
RISC-V software exception	EFI_SOFTWARE_RISCV _EXCEPTION	The status code is directly related to RISC-V exception.
PEI Services	EFI_SOFTWARE_PEI _SERVICE	The status code is directly related to a PEI Services function.
EFI Boot Services	EFI_SOFTWARE_EFI_BOOT _SERVICE	The status code is directly related to a UEFI Boot Services function.
EFI Runtime Services	EFI_SOFTWARE_EFI _RUNTIME_SERVICE	The status code is directly related to a UEFI Runtime Services function.
DXE Services	EFI_SOFTWARE_EFI_DXE_SERVICE	The status code is directly related to a DXE Services function.
0x13-0x7F	Reserved for future use by this specification.	NA
0x80-0xFF	Reserved for OEM use.	NA

6.5.5.2. Unspecified Subclass¶

This subclass applies to any software entity not belonging to any of the other software subclasses. It may also be used if the caller is unable to determine the exact subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

Table 6.48 Progress and Error Code Operations: HostSoftware Unspecified Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification.	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification.	NA

None.

6.5.5.3. SEC Subclass¶

This subclass applies to the Security (SEC) phase in software.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass. In most platforms, status code services may be unavailable during the SEC phase.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.49 Progress and Error Code Operations: SECSubclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_SEC_PC_ENTRY_POINT	Entry point of the phase.	None
	EFI_SW_SEC_PC _HANDOFF_TO_NEXT	Handing off to the next phase	None
	0x1002-0x7FFF	Reserved for future use by this specification	Reserved for future use by this specification
Error	0x1000 0x7FFF	Reserved for future use by this specification	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions

6.5.5.4. PEI Foundation Subclass¶

This subclass applies to the PEI Foundation. The PEI Foundation is responsible for starting and ending the PEI phase as well as dispatching Pre-EFI Initialization Modules (PEIMs).

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.50 Progress and Error Code Operations: PEIFoundation Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_PEI_CORE_PC_ENTRY_POINT	Entry point of the phase	None
	EFI_SW_PEI_CORE_PC_HANDOFF _TO_NEXT	Handing off to the next phase (DXE)	None
	EFI_SW_PEI_CORE_PC_RETURN _TO_LAST	Returning to the last phase	None
	0x1003-0x7FFF	Reserved for future use by this specification	NA
Error	EFI_SW_PEI_CORE_EC_DXE _CORRUPT	Unable to hand off to DXE because the DXE Foundation could not be found	None
	EFI_SW_PEI_CORE_EC_DXEIPL _NOT_FOUND	DXE IPL PPI could not be found	None
	EFI_SW_PEI_CORE_EC_MEMORY _NOT_INSTALLED	PEIM dispatching is over and InstallPeiMemory() PEI Service has not been called	None
	0x1003-0x7FFF	Reserved for future use by this specification	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

6.5.5.5. PEI Module Subclass¶

This subclass applies to Pre-EFI Initialization Modules (PEIMs).

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.51 Progress and Error Code Operations: PEIModule Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_PEI_PC_RECOVERY_BEGIN	Crisis recovery has been initiated.	NULL
	EFI_SW_PEI_PC_CAPSULE_LOAD	Found a recovery capsule. About to load the recovery capsule.	NULL
	EFI_SW_PEI_PC_CAPSULE_START	Loaded the recovery capsule. About to hand off control to the capsule.	NULL
	EFI_SW_PEI_PC_RECOVERY_USER	Recovery was forced by the user via a jumper, for example. Reported by the PEIM that detects the jumpers and updates the boot mode.	NULL
	EFI_SW_PEI_PC_RECOVERY_AUTO	Recovery was forced by the software based on some policy. Reported by the PEIM that updates the boot mode to force recovery.	NULL
	EFI_SW_PEI_PC_S3_BOOT_SCRIPT	S3 boot script execution.	NULL
	EFI_SW_PEI_PC_OS_WAKE	Calling OS S3 wake up vector.	NULL
	EFI_SW_PEI_PC_S3_STARTED	Signifies beginning of the EFI_PEI_S3 _RESUME_PPI S3 RestoreConfig() execution.	NULL
	0x1008-0x7FFF	Reserved for future use by this specification.	NULL
Error	EFI _SW_PEI_EC_NO _RECOVERY_CAPSULE	Unable to continue with the crisis recovery because no recovery capsule was found.	NULL
	EFI_SW_PEI_EC_INVALID _CAPSULE_DESCRIPTOR	An invalid or corrupt capsule descriptor was detected.	NULL
	EFI_SW_PEI_EC_S3_RESUME _PPI_NOT_FOUND	S3 Resume PPI is not found.	NULL
	EFI_SW_PEI_EC_S3_BOOT _SCRIPT_ERROR	Error during boot script execution.	NULL
	EFI_SW_PEI_EC_S3_OS _WAKE_ERROR	Error related to the OS wake up vector (no valid vector found or vector returned control back to the firmware)	NULL
	EFI_SW_PEI_EC_S3 _RESUME_FAILED	Unspecified S3 resume failure.	NULL
	EFI_SW_PEI_EC_RECOVERY _PPI_NOT_FOUND	Recovery failed because Recovery Module PPI is not found.	NULL
	EFI_SW_PEI_EC _RECOVERY_FAILED	Unspecified Recovery failure.	NULL
	EFI_SW_PEI_EC_S3_RESUME _ERROR	Error during S3 resume process.	NULL
	EFI_SW_PEI_EC_INVALID _CAPSULE	Invalid capsule is detected.	NULL
	0x100A-0x7FFF	Reserved for future use by this specification.

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

6.5.5.6. DXE Foundation Subclass¶

This subclass applies to DXE Foundation software. The DXE Foundation is responsible for providing core services, dispatching DXE drivers, and calling the Boot Device Selection (BDS) phase.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.52 Progress and Error Code Operations: DXEFoundation Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_DXE_CORE_PC_ENTRY _POINT	Entry point of the phase.	None
	EFI_SW_DXE_CORE_PC_HANDOFF _TO_NEXT	Handing off to the next phase (Runtime).	None
	EFI_SW_DXE_CORE_PC_RETURN _TO_LAST	Returning to the last phase.	None
	EFI_SW_DXE_CORE_PC_START _DRIVER	Calling the Start() function of the EFI _DRIVER_BINDING Protocol.	See EFI_STATUS _CODE_START _EXTENDED_DATA
	EFI_SW_DXE_CORE_PC_ARCH _READY	All architectural protocols are available.	None
	0x1005-0x7FFF	Reserved for future use by this specification.	NA
Error	EFI_SW_DXE_CORE_EC_NO_ARCH	Driver dispatching is over and some of the architectural protocols are not available.	None
	0x1001-0x7FFF	Reserved for future use by this specification.	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions

See Extended Error Data in Software Classes for definitions of the extended error data listed above.

6.5.5.7. DXE Boot Service Driver Subclass¶

This subclass applies to DXE boot service drivers. If a driver provides both boot services and runtime services, it is considered a runtime service driver.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.53 Progress and Error Code Operations: DXEBoot Service Driver Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_DXE_BS_PC_LEGACY _OPROM_INIT	Initializing a legacy Option ROM (OpROM).	See EFI_LEGACY_OPROM _EXTENDED_DATA
	EFI_SW_DXE_BS_PC_READY _TO_BOOT_EVENT	The EFI_EVENT_GROUP _READY_TO_BOOT event was signaled. See the UEFI Specification.	None
	EFI_SW_DXE_BS_PC _LEGACY_BOOT_EVENT	The event with GUID EFI_EVENT_LEGACY _BOOT_GUID was signaled. See the DXE CIS.	None
	EFI_SW_DXE_BS_PC_EXIT _BOOT_SERVICES_EVENT	The EVT_SIGNAL_EXIT _BOOT_SERVICES event was signaled. See the UEFI Specification	None
	EFI_SW_DXE_BS_PC_VIRTUAL _ADDRESS_CHANGE_EVENT	The EVT_SIGNAL_VIRTUAL _ADDRESS_CHANGE event was signaled. See the UEFI Specification.	None
	EFI_SW_DXE_BS_PC _VARIABLE_SERVICES_INIT	Variable Services initialization	None
	EFI _SW_DXE_BS_PC _VARIABLE_RECLAIM	Variable Services driver is about to start variable store reclaim process (a process of storage optimization by removing stale data).	None
	EFI_SW_DXE_BS_PC _CONFIG_RESET	Configuration is about to be reset	None
	EFI_SW_DXE_BS_PC _CSM_INIT	Compatibility (legacy BIOS) Support Module initialization.	None
	0x100A-0x7FFF	Reserved for future use by this specification.	NA
Error	EFI_SW_DXE_BS_EC _LEGACY_OPROM_NO_SPACE	Not enough memory available to shadow a legacy option ROM.	See EFI_LEGACY_OPROM _ EXTENDED_DATA. RomImageBase corresponds to the ROM image in the regular memory as opposed to shadow RAM.
	EFI_SW_DXE_BS_EC _INVALID_PASSWORD	Invalid password has been provided.	None
	EFI_SW_DXE_BS_EC _BOOT_OPTION_LOAD_ERROR	Error during boot option loading (LoadImage returned error).	E FI_RETURN_STATU S_EXTENDED_DATA
	EFI_SW_DXE_BS_EC _BOOT_OPTION_FAILED	Error during boot option launch (StartImage returned error).	EFI_RETURN_STATUS _EXTENDED_DATA
	EFI_SW_DXE_BS_EC_INVALID _IDE_PASSWORD	Invalid hard driver password has been provided.	None
Progress	EFI_SW_DXE_BS_PC_ATTEMPT _BOOT_ORDER_EVENT	Attempting boot from options defined in the BootOrder list.	None
	0x1005-0x7FFF	Reserved for future use by this specification.	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions
Error Code Definitions

See Extended Error Data in Software Classes for definitions of the extended error data listed above.

6.5.5.8. DXE Runtime Service Driver Subclass¶

This subclass applies to DXE runtime service drivers.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

Table 6.54 Progress and Error Code Operations: DXERuntime Service Driver Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification.	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification.	NA

None.

6.5.5.9. SMM Driver Subclass¶

This subclass applies to SMM code.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

Table 6.55 Progress and Error Code Operations: SMMDriver Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.5.5.10. EFI Application Subclass¶

This subclass applies to UEFI applications.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

Table 6.56 Progress and Error Code Operations: UEFIApplication Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.5.5.11. OS Loader Subclass¶

This subclass applies to any OS loader application. Although OS loaders are UEFI applications, they are very special cases and merit a separate subclass.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

Table 6.57 Progress and Error Code Operations: OSLoader Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	0x1000-0x7FFF	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

None.

6.5.6. Runtime (RT) Subclass¶

This subclass applies to runtime software. Runtime software is made up of the UEFI-aware operating system and the non-UEFI software running under the operating system environment. Other firmware components, such as SAL code or ASL code, are also executing during this phase but cannot call a UEFI runtime service. Hence no codes are reserved for them.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.58 Progress and Error Code Operations: Runtime Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_RT_PC_ENTRY_POINT	Entry point of the phase.	None
	EFI_SW_RT_PC_RETURN_TO_LAST	Returning to the last phase.	None
	EFI_SW_RT_PC_HANDOFF_TO_NEXT
	0x1003-0x7FFF	Reserved for future use by this specification.	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification.	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions

6.5.6.1. PEI Services Subclass¶

This subclass applies to any PEI Service present in the PEI Services Table.

Progress and Error Codes

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass. These progress codes are reported by the code that provides the specified boot service and not by the module that invokes the given boot service.

Many of the descriptions below refer to the Platform Initialization Pre-EFI Initialization Core Interface Specification, or PEI CIS. Also, see “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.59 Progress and Error Code Operations: PEISubclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_PS_PC_INSTALL_PPI	Install a PPI. See the PEI CIS.	None
	EFI_SW_PS_PC_REINSTALL_PPI	Reinstall a PPI. See the PEI CIS.	None
	EFI_SW_PS_PC_LOCATE_PPI	Locate an existing. PPI See the PEI CIS.	None
	EFI_SW_PS_PC_NOTIFY_PPI	Install a notification callback. See the PEI CIS.	None
	EFI_SW_PS_PC_GET_BOOT_MODE	Get the current boot mode. See the PEI CIS.	None
	EFI_SW_PS_PC_SET_BOOT_MODE	Set the current boot mode. See the PEI CIS.	None
	EFI_SW_PS_PC_GET_HOB_LIST	Get the HOB list. See the PEI CIS.	None
	EFI_SW_PS_PC_CREATE_HOB	Create a HOB. See the PEI CIS.	None
Progress cont	EFI_SW_PS_PC_FFS_FIND_NEXT_VOLUME	Find the next FFS formatted firmware volume. See the PEI CIS.	None
	EFI_SW_PS_PC_FFS_FIND_NEXT_FILE	Find the next FFS file. See the PEI CIS.	None
	EFI_SW_PS_PC_FFS_FIND_SECTION_DATA	Find a section in an FFS file. See the PEI CIS.	None
	EFI_SW_PS_PC_INSTALL_PEI_MEMORY	Install the PEI memory. See the PEI CIS.	None
	EFI_SW_PS_PC_ALLOCATE_PAGES	Allocate pages from the memory heap. See the PEI CIS.	None
	EFI_SW_PS_PC_ALLOCATE_POOL	Allocate from the memory heap. See the PEI CIS.	None
	EFI_SW_PS_PC_COPY_MEM	Copy memory. See the PEI CIS.	None
	EFI_SW_PS_PC_SET_MEM	Set a memory range to a specific value. See the PEI CIS.	None
	EFI_SW_PS_PC_RESET_SYSTEM	System reset. See the PEI CIS.	None
	EFI_SW_PS_PC_FFS_FIND_FILE_BY_NAME	Find a file in a firmware volume by name. See the PEI CIS.	None
	EFI_SW_PS_PC_FFS_GET_FILE_INFO	Get information about a file in a firmware volume. See the PEI CIS.	None
	EFI_SW_PS_PC_FFS_GET_VOLUME_INFO	Get information about a firmware volume. See the PEI CIS.	None
	EFI_SW_PS_PC_FFS_REGISTER _FOR_SHADOW	Register a module to be shadowed after permanent memory is discovered. See the PEI CIS.	None
	0x1017-0x7fff	Reserved for future use by this specification.	NA
Error	EFI_SW_PS_EC_RESET_NOT_AVAILABLE	ResetSystem() PEI Service is failed because Reset PPI is not available.	None
	EFI_SW_PS_EC_MEMORY_INSTALLED _TWICE	InstallPeiMemory() PEI Service is called more than once.	None
	0x1002 0x7FFF	Reserved for future use by this specification.	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions

6.5.6.2. Boot Services Subclass¶

This subclass applies to any boot service present in the UEFI Boot Services Table.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass. These progress codes are reported by the code that provides the specified boot service and not by the module that invokes the given boot service.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.60 Progress and Error Code Operations: BootServices Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_BS_PC_RAISE_TPL	Raise the task priority level service; see UEFI Specification. This code is an invalid operation because the status code driver uses this boot service. The status code driver cannot report its own status codes.	None
	EFI_SW_BS_PC_RESTORE_TPL	Restore the task priority level service; see UEFI Specification. This code is an invalid operation because the status code driver uses this boot service. The status code driver cannot report its own status codes.	None
	EFI_SW_BS_PC_ALLOCATE_PAGE	Allocate page service; see UEFI Specification.	None
	EFI_SW_BS_PC_FREE_PAGES	Free page service; see UEFI Specification.	None
	EFI_SW_BS_PC_GET_MEMORY_MAP	Get memory map service; see UEFI Specification.	None
	EFI_SW_BS_PC_ALLOCATE_POOL	Allocate pool service; see UEFI Specification.	None
	EFI_SW_BS_PC_FREE_POOL	Free pool service see; UEFI Specification.	None
	EFI_SW_BS_PC_CREATE_EVENT	CreateEvent service see; UEFI Specification.	None
	EFI_SW_BS_PC_SET_TIMER	Set timer service see; UEFI Specification.	None
	EFI_SW_BS_PC_WAIT_FOR_EVENT	Wait for event service see; UEFI Specification.	None
Progress cont	EFI_SW_BS_PC_SIGNAL_EVENT	Signal event service; see UEFI Specification. This code is an invalid operation because the status code driver uses this boot service. The status code driver cannot report its own status codes.	None
	EFI_SW_BS_PC_CLOSE_EVENT	Close event service; see UEFI Specification	None
	EFI_SW_BS_PC_CHECK_EVENT	Check event service; see UEFI Specification	None
	EFI_SW_BS_PC_INSTALL _PROTOCOL_INTERFACE	Install protocol interface service; see UEFI Specification	None
	EFI_SW_BS_PC_REINSTALL _PROTOCOL_INTERFACE	Reinstall protocol interface service; see UEFI Specification	None
	EFI_SW_BS_PC_UNINSTALL _PROTOCOL_INTERFACE	Uninstall protocol interface service; see UEFI Specification	None
	EFI_SW_BS_PC_HANDLE _PROTOCOL	Handle protocol service; see UEFI Specification	None
	EFI_SW_BS_PC_PC _HANDLE_PROTOCOL	PC handle protocol service; see UEFI Specification	None
	EFI_SW_BS_PC_REGISTER _PROTOCOL_NOTIFY	Register protocol notify service; see UEFI Specification	None
	EFI_SW_BS_PC_LOCATE _HANDLE	Locate handle service; see UEFI Specification	None
	EFI_SW_BS_PC_INSTALL _CONFIGURATION_TABLE	Install configuration table service; see UEFI Specification	None
	EFI_SW_BS_PC_LOAD_IMAGE	Load image service; see UEFI Specification	None
	EFI_SW_BS_PC_START_IMAGE	Start image service; see UEFI Specification	None
	EF I_SW_BS_PC_EXIT	Exit service; see UEFI Specification	None
	EFI_SW_BS_PC_UNLOAD _IMAGE	Unload image service; see UEFI Specification	None
	EFI_SW_BS_PC_EXIT_BOOT _SERVICES	Exit boot services service; see UEFI Specification	None
	EFI_SW_BS_PC_GET_NEXT _MONOTONIC_COUNT	Get next monotonic count service; see UEFI Specification	None
	EFI _SW_BS_PC_STALL	Stall service; see UEFI Specification	None
	EFI_SW_BS_PC_SET_WATCHDOG _TIMER	Set watchdog timer service; see UEFI Specification	None
	EFI_SW_BS_PC_CONNECT _CONTROLLER	Connect controller service; see UEFI Specification	None
Progress cont	EFI_SW_BS_PC_DISCONNECT _CONTROLLER	Disconnect controller service; see UEFI Specification	None
	EFI_SW_BS_PC_OPEN_PROTOCOL	Open protocol service; see UEFI Specification	None
	EFI_SW_BS_PC_CLOSE_PROTOCOL	Close protocol service; see UEFI Specification	None
	EFI_SW_BS_PC_OPEN_PROTOCOL _INFORMATION	Open protocol Information service; see UEFI Specification	None
	EFI_SW_BS_PC_PROTOCOLS _PER_HANDLE	Protocols per handle service; see UEFI Specification	None
	EFI_SW_BS_PC_LOCATE _HANDLE_BUFFER	Locate handle buffer service; see UEFI Specification	None
	EFI_SW_BS_PC_LOCATE_PROTOCOL	Locate protocol service; see UEFI Specification	None
	E FI_SW_BS_PC_INSTALL_MULTIPLE _PROTOCOL_INTERFACES	Install multiple protocol interfaces service; see UEFI Specification	None
	EFI_SW_BS_PC_UNINSTALL_MULTIPLE _PROTOCOL_INTERFACES	Uninstall multiple protocol interfaces service; see UEFI Specification	None
	EFI_SW_BS_PC_CALCULATE _CRC_32	Calculate CRC32 service; see UEFI Specification	None
	EFI_SW_BS_PC_COPY_MEM	Copy memory; see UEFI Specification	None
	EFI_SW_BS_PC_SET_MEM	Set memory to a specific value; see UEFI Specification	None
	EFI_SW_BS_PC_CREATE_EVENT_EX	Create an event and optionally associate it with an event group. See the UEFI Specification	None
	0x102b-0x7fff	Reserved for future use by this specification	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions

6.5.6.3. Runtime Services Subclass¶

This subclass applies to any runtime service present in the UEFI Runtime Services Table.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass. For obvious reasons, the runtime service ReportStatusCode() cannot report status codes related to the progress of the ReportStatusCode() function.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.61 Progress and Error Code Operations:Runtime Services Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_RS_PC_GET_TIME	Get time service; see UEFI Specification.	None
	EFI_SW_RS_PC_SET_TIME	Set time service; see UEFI Specification.	None
	EFI_SW_RS_PC_GET _WAKEUP_TIME	Get wakeup time service; see UEFI Specification.	None
	EFI_SW_RS_PC_SET _WAKEUP_TIME	Set wakeup time service; see UEFI Specification.	None
	EFI_SW_RS_PC_SET _VIRTUAL_ADDRESS_MAP	Set virtual address map service; see UEFI Specification.	None
	EFI_SW_RS_PC_CONVERT _POINTER	Convert pointer service; see UEFI Specification.	None
	EFI_SW_RS_PC_GET _VARIABLE	Get variable service; see UEFI Specification.	None
	EFI_SW_RS_PC_GET_NEXT _VARIABLE_NAME	Get next variable name service; see UEFI Specification.	None
	EFI_SW_RS_PC_SET _VARIABLE	Set variable service; see UEFI Specification.	None
	EFI_SW_RS_PC_GET_NEXT _HIGH_MONOTONIC_COUNT	Get next high monotonic count service; see UEFI Specification.	None
	EFI_SW_RS_PC_RESET _SYSTEM	Reset system service; see UEFI Specification.	None
	EFI_SW_RS_PC_UPDATE _CAPSULE	Update a capsule. See the UEFI Specification.	None
	EFI_SW_RS_PC_QUERY_CAPSULE _CAPABILITIES	Query firmware support for capsulate capabilities.See the UEFI specification.	None
	EFI_SW_RS_PC_QUERY_VARIABLE _INFO	Query firmware support for EFI variables. See the UEFI specification.	None
	0x100E	Reserved for future use by this specification.	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification.	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions

6.5.6.4. DXE Services Subclass¶

This subclass applies to any DXE Service that present in the UEFI DXE Services Table.

Progress and Error Code Operations

In addition to the standard progress and error codes that are defined for the Host Software class, the table below lists the additional codes for this subclass.

See “Related Definitions” below for links to the definitions of code listed in this table.

Table 6.62 Progress and Error Code Operations: DXEServices Subclass¶
Type of Code	Operation	Description	Extended Data
Progress	EFI_SW_DS_PC_ADD _MEMORY_SPACE	Add memory to GCD. See DXE CIS.	None
	EFI_SW_DS_PC_ALLOCATE _MEMORY_SPACE	Allocate memory from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_FREE _MEMORY_SPACE	Free memory from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_REMOVE _MEMORY_SPACE	Remove memory from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_GET _MEMORY_SPACE_DESCRIPTOR	Get memory descriptor from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_SET _MEMORY_SPACE_ATTRIBUTES	Set attributes of memory in GCD. See DXE CIS.	None
	EFI_SW_DS_PC_GET_MEMORY _SPACE_MAP	Get map of memory space from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_ADD _IO_SPACE	Add I/O to GCD. See DXE CIS.	None
	EFI_SW_DS_PC_ALLOCATE _IO_SPACE	Allocate I/O from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_FREE _IO_SPACE	Free I/O from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_REMOVE_IO _SPACE	Remove I/O space from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_GET_IO_SPACE _DESCRIPTOR	Get I/O space descriptor from GCD. See DXE CIS.	None
	EFI_SW_DS_PC_GET_IO _SPACE_MAP	Get map of I/O space from the GCD. See DXE CIS.	None
	EFI_SW_DS_PC_DISPATCH	Dispatch DXE drivers from a firmware volume. See DXE CIS.	None
	EFI_SW_DS_PC_SCHEDULE	Clear the schedule on request flag for a driver. See DXE CIS.	None
	EFI_SW_DS_PC_TRUST	Promote a file to trusted state. See DXE CIS.	None
	EFI_SW_DS_PC_PROCESS _FIRMWARE_VOLUME	Dispatch all drivers in a firmware volume. See DXE CIS.	None
	0x1011-0x7FFF	Reserved for future use by this specification.	NA
Error	0x1000-0x7FFF	Reserved for future use by this specification.	NA

See the following topic in Software Classes for definitions of the subclass-specific operations listed above:

Progress Code Definitions

6.6. Code Definitions¶

This section provides the code definitions for the following data types and structures for status codes:

Data structures and types that are common to all status codes
Progress, error, and debug codes that are common to all classes
Class definitions
Subclass definitions for each status code class
Extended error data

This section defines the data structures that are common to all status codes. For class- and subclass-specific information, see Class Definitions.

6.6.1. Data Structures¶

See the ReportStatusCode() declaration in Volume 2 of this specification for definitions and details on the following basic data structures:

EFI_STATUS_CODE_TYPE and defined severities
EFI_PROGRESS_CODE
EFI_ERROR_CODE
EFI_DEBUG_CODE
EFI_STATUS_CODE_VALUE

6.6.2. Extended Data Header¶

6.6.2.1. EFI_STATUS_CODE_DATA¶

Summary

The definition of the status code extended data header. The data will follow HeaderSize bytes from the beginning of the structure and is Size bytes long.

typedef struct {
   UINT16    HeaderSize;
   UINT16    Size;
   EFI_GUID  Type;
}  EFI_STATUS_CODE_DATA;

Parameters

HeaderSize: The size of the structure. This is specified to enable future expansion.

Size: The size of the data in bytes. This does not include the size of the header structure.

Type: The GUID defining the type of the data. The standard GUIDs and their associated data structures are defined in this specification.

Description

The status code information may be accompanied by optional extended data. The extended data begins with a header. The header contains a Type field that represents the format of the extended data following the header. This specification defines two GUIDs and their meaning. If these GUIDs are used, the extended data contents must follow this specification. Extended data formats that are not compliant with this specification are permitted, but they must use different GUIDs. The format of the extended data header is defined in Platform Initialization DXE CIS , but it is duplicated here for convenience.

6.6.2.2. EFI_STATUS_CODE_DATA_TYPE_STRING_GUID¶

Summary

Defines a string type of extended data.

GUID

#define EFI_STATUS_CODE_DATA_TYPE_STRING_GUID \
  { 0x92D11080, 0x496F, 0x4D95, 0xBE, 0x7E, 0x03, 0x74, \
  0x88, 0x38, 0x2B, 0x0A }

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA           DataHeader;
  EFI_STRING_TYPE                StringType;
  EFI_STATUS_CODE_STRING         String;
} EFI_STATUS_CODE_STRING_DATA;

Parameters

DataHeader: The data header identifying the data. D ataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_STATUS_CODE_STRING_DATA) - HeaderSize and DataHeader.Type should be EFI_STATUS_CODE_DATA_TYPE_STRING_GUID.

StringType: Specifies the format of the data in String . Type EFI_STRING_TYPE is defined in “Related Definitions” below.

String: A pointer to the extended data. The data follows the format specified by StringType. Type EFI_STRING_TYPE is defined in “Related Definitions” below.

Description

This data type defines a string type of extended data. A string can accompany any status code. The string can provide additional information about the status code. The string can be ASCII, Unicode, or a Human Interface Infrastructure (HII) token/GUID pair.

//**********************************************
// EFI_STRING_TYPE
//**********************************************

typedef enum {
  EfiStringAscii,
  EfiStringUnicode,
  EfiStringToken
} EFI_STRING_TYPE;

EfiStringAscii: A NULL -terminated ASCII string.
EfiStringUnicode: A double NULL -terminated Unicode string.
EfiStringToken: An EFI_STATUS_CODE_STRING_TOKEN representing the string. The actual string can be obtained by querying the HII database.

//**********************************************
// EFI_STATUS_CODE_STRING_TOKEN
//**********************************************

//
// HII string token
//
typedef struct {
  EFI_HII_HANDLE     Handle;
  EFI_STRING_ID      Token;
} EFI_STATUS_CODE_STRING_TOKEN;

Handle: The HII package list which contains the string. Handle is a dynamic value that may not be the same for different boots. Type EFI_HII_HANDLE is defined in EFI_HII_DATABASE_PROTOCOL.NewPackageList() in the UEFI Specification.
Token: When combined with Handle , the string token can be used to retrieve the string. Type EFI_STRING_ID is defined in EFI_IFR_OP_HEADER in the UEFI Specification.

//**********************************************
// EFI_STATUS_CODE_STRING
//**********************************************

//
// String structure
//
typedef union {
  CHAR8                         *Ascii;
  CHAR16                        *Unicode;
  EFI_STATUS_CODE_STRING_TOKEN  Hii;
} EFI_STATUS_CODE_STRING;

Ascii: ASCII formatted string.
Unicode: Unicode formatted string.
Hii: HII handle/token pair. Type EFI_STATUS_CODE_STRING_TOKEN is defined above.

6.6.2.3. EFI_STATUS_CODE_SPECIFIC_DATA_GUID¶

Summary

Indicates that the format of the accompanying data depends upon the status code value but follows this specification.

GUID

#define EFI_STATUS_CODE_SPECIFIC_DATA_GUID \
  {0x335984bd,0xe805,0x409a,0xb8,0xf8,0xd2,0x7e, \
  0xce,0x5f,0xf7,0xa6}

Description

This GUID indicates that the format of the accompanying data depends upon the status code value but follows this specification. This specification defines the format of the extended data for several status code values. For example, EFI_DEBUG_ASSERT_DATA defines the extended error data for the error code EFI_SW_EC_ILLEGAL_SOFTWARE_STATE . The agent reporting this error condition can use this GUID if the extended data follows the format defined in EFI_DEBUG_ASSERT_DATA .

If the consumer of the status code detects this GUID, it must look up the status code value to correctly interpret the contents of the extended data.

This specification declares certain ranges of status code values as OEM specific. Because this specification does not define the meaning of status codes in these ranges, the extended data for these cannot use this GUID. The OEM defining the meaning of the status codes is responsible for defining the GUID that is to be used for associated extended data.

6.6.3. Enumeration Schemes¶

6.6.3.1. Operation Code Enumeration Scheme¶

Summary

All operation codes (regardless of class and subclass) use the progress code partitioning scheme listed in the table below.

Table 6.63 Progress Code Enumeration Scheme¶
Operation	Description
0x0000-0x0FFF	These operation codes are common to all the subclasses in a given class. These values are used to represent operations that are common to all subclasses in a given class. For example, all the I/O buses in the I/O Bus subclasses share an operation code that represents the reset operation, which is a common operation for most buses. It is possible that certain operation codes in this range will not be applicable to certain subclasses. It is also possible that the format of the extended data will vary from one subclass to another. If the subclass does not define the format of the extended data extended data is not required. These codes are reserved by this specification.
0x1000-0x7FFF	These operation codes are specific to the subclass and represent operations that are specific to the subclass. These codes are reserved by this specification.
0x8000-0xFFFF	Reserved for OEM use.

Prototype

//
// General partitioning scheme for Progress and Error Codes
// 0x0000-0x0FFF - Shared by all subclasses in a given class
// 0x1000-0x7FFF - Subclass Specific
// 0x8000-0xFFFF - OEM specific
//
#define EFI_SUBCLASS_SPECIFIC           0x1000
#define EFI_OEM_SPECIFIC                0x8000

6.6.3.2. Debug Code Enumeration Scheme¶

Summary

All classes share these debug operation codes. It is not currently expected that operation codes have a lot of meaning for debug information. Only one debug code is currently defined by this specification and it is shared by all classes and subclasses.

Table 6.64 Debug Code Enumeration Scheme¶
Debug Code	Description
0x0000-0x7FFF	Reserved for future use by this specification.
0x8000-0xFFFF	Reserved for OEM use.

Prototype

//
// Debug Code definitions for all classes and subclass
// Only one debug code is defined at this point and should
// be used for anything that gets sent to debug stream.
//
#define EFI_DC_UNSPECIFIED 0x0

6.6.4. Common Extended Data Formats¶

This section specifies formats for the extended data included in a variety of status codes.

6.6.4.1. EFI_DEVICE_PATH_EXTENDED_DATA¶

Summary

Extended data about the device path, which is used for many errors and progress codes to point to the device.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA               ``DataHeader`` ;
  // EFI_DEVICE_PATH_PROTOCOL        ``DevicePath`` ;
} EFI_DEVICE_PATH_EXTENDED_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA). DataHeader.Size should be the size of variable-length DevicePath, and DataHeader.Size is zero for a virtual device that does not have a device path. DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

DevicePath: The device path to the controller or the hardware device. Note that this parameter is a variable-length device path structure and not a pointer to such a structure. This structure is populated only if it is a physical device. For virtual devices, the Size field in DataHeader is set to zero and this field is not populated.

Description

The device path is used to point to the physical device in case there is more than one device belonging to the same subclass. For example, the system may contain two USB keyboards and one PS/2* keyboard. The driver that parses the status code can use the device path extended data to differentiate between the three. The index field is not useful in this case because there is no standard numbering convention. Device paths are preferred over using device handles because device handles for a given device can change from one boot to another and do not mean anything beyond Boot Services time. In certain cases, the bus driver may not create a device handle for a given device if it detects a critical error. In these cases, the device path extended data can be used to refer to the device, but there may not be any device handles with an instance of EFI_DEVICE_PATH_PROTOCOL that matches DevicePath . The variable device path structure is included in this structure to make it self sufficient.

6.6.4.2. EFI_DEVICE_HANDLE_EXTENDED_DATA¶

Summary

Extended data about the device handle, which is used for many errors and progress codes to point to the device.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA     DataHeader;
  EFI_HANDLE               Handle;
} EFI_DEVICE_HANDLE_EXTENDED_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_DEVICE_HANDLE_EXTENDED_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

Handle: The device handle.

Description

The handle of the device with which the progress or error code is associated. The handle is guaranteed to be accurate only at the time the status code is reported. Handles are dynamic entities between boots, so handles cannot be considered to be valid if the system has reset subsequent to the status code being reported. Handles may be used to determine a wide variety of useful information about the source of the status code.

6.6.4.3. EFI_RESOURCE_ALLOC_FAILURE_ERROR_DATA¶

Summary

This structure defines extended data describing a PCI resource allocation error.

Prototype

Note:: The following structure contains variable-length fields and cannot be defined as a C-style structure.

typedef struct {
  EFI_STATUS_CODE_DATA           DataHeader;
  UINT32                         Bar;
  UINT16                         DevicePathSize;
  UINT16                         ReqResSize;
  UINT16                         AllocResSize;
  // EFI_DEVICE_PATH_PROTOCOL    DevicePath;
  // UINT8                       ReqRes[...];
  // UINT8                       AllocRes[...];

} EFI_RESOURCE_ALLOC_FAILURE_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , D ataHeader.Size should be ( DevicePathSize + DevicePathSize + DevicePathSize + sizeof(UINT32) + 3 \* sizeof (UINT16) ), and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

Bar: The PCI BAR. Applicable only for PCI devices. Ignored for all other devices.

DevicePathSize: DevicePathSize should be zero if it is a virtual device that is not associated with a device path. Otherwise, this parameter is the length of the variable-length DevicePath.

ReqResSize: Represents the size the ReqRes parameter. ReqResSize should be zero if the requested resources are not provided as a part of extended data.

AllocResSize: Represents the size the AllocRes parameter. AllocResSize should be zero if the allocated resources are not provided as a part of extended data.

DevicePath: The device path to the controller or the hardware device that did not get the requested resources. Note that this parameter is the variable-length device path structure and not a pointer to this structure.

ReqRes: The requested resources in the format of an ACPI 2.0 resource descriptor. This parameter is not a pointer; it is the complete resource descriptor.

AllocRes: The allocated resources in the format of an ACPI 2.0 resource descriptor. This parameter is not a pointer; it is the complete resource descriptor.

Description

This extended data conveys details for a PCI resource allocation failure error. See the PCI specification and the ACPI specification for details on PCI resource allocations and the format for resource descriptors. This error does not detail why the resource allocation failed. It may be due to a bad resource request or a lack of available resources to satisfy a valid request. The variable device path structure and the resource structures are included in this structure to make it self sufficient.

6.7. Class Definitions¶

Summary

Classes correspond to broad types of system pieces. These types are chosen to provide a reasonable initial classification of the system entity whose status is represented. There are three classes of hardware and one class for software. These classes are listed in the table below. Each class is made up of several subclasses. See “Types of Status Codes” for descriptions of each of these classes.

Table 6.65 Class Definitions¶
Type of Class	Class Name	Data Type Name
Hardware	Computing Unit	EFI_COMPUTING_UNIT
	User-Accessible Peripherals	EFI_PERIPHERAL
	I/O Bus	EFI_IO_BUS
Software	Host Software	EFI_SOFTWARE

Prototype

//
// Class definitions
// Values of 4-127 are reserved for future use by this
// specification.
// Values in the range 128-255 are reserved for OEM use.
//
#define EFI_COMPUTING_UNIT  0x00000000
#define EFI_PERIPHERAL      0x01000000
#define EFI_IO_BUS          0x02000000
#define EFI_SOFTWARE        0x03000000

6.7.1. Computing Unit Class¶

The table below lists the subclasses defined in the Computing Unit class. See the following section for their code definitions.

Table 6.66 Defined Subclasses: Computing Unit Class¶
Subclass	Code Name
Unspecified	EFI_COMPUTING_UNIT_UNSPECIFIED
Host processor	EFI_COMPUTING_UNIT_HOST_PROCESSOR
Firmware processor	EFI_COMPUTING_UNIT_FIRMWARE_PROCESSOR
Service processor	EFI_COMPUTING_UNIT_SERVICE_PROCESSOR
I/O processor	EFI_COMPUTING_UNIT_IO_PROCESSOR
Cache	EFI_COMPUTING_UNIT_CACHE
Memory	EFI_COMPUTING_UNIT_MEMORY
Chipset	EFI_COMPUTING_UNIT_CHIPSET

6.7.1.1. Subclass Definitions¶

Summary

Definitions for the Computing Unit subclasses. See Subclasses in Computing Unit Class for descriptions of these subclasses.

Prototype

//
// Computing Unit Subclass definitions.
// Values of 8-127 are reserved for future use by this
// specification.
// Values of 128-255 are reserved for OEM use.
//
#define EFI_COMPUTING_UNIT_UNSPECIFIED \
   (EFI_COMPUTING_UNIT | 0x00000000)
#define EFI_COMPUTING_UNIT_HOST_PROCESSOR \
   (EFI_COMPUTING_UNIT | 0x00010000)
#define EFI_COMPUTING_UNIT_FIRMWARE_PROCESSOR \
   (EFI_COMPUTING_UNIT | 0x00020000)
#define EFI_COMPUTING_UNIT_IO_PROCESSOR \
   (EFI_COMPUTING_UNIT | 0x00030000)
#define EFI_COMPUTING_UNIT_CACHE \
   (EFI_COMPUTING_UNIT | 0x00040000)
#define EFI_COMPUTING_UNIT_MEMORY \
   (EFI_COMPUTING_UNIT | 0x00050000)
#define EFI_COMPUTING_UNIT_CHIPSET \
   (EFI_COMPUTING_UNIT | 0x00060000)

6.7.1.2. Progress Code Definitions¶

Summary

Progress code definitions for the Computing Unit class and all subclasses. See Progress Code Operations in “Computing Unit Class” for descriptions of these progress codes. The following subclasses define additional subclass-specific progress code operations, which are included below:

Host processor
Cache
Memory

Prototype

//
// Computing Unit Class Progress Code definitions.
// These are shared by all subclasses.
//
#define EFI_CU_PC_INIT_BEGIN           0x00000000
#define EFI_CU_PC_INIT_END             0x00000001


//
// Computing Unit Unspecified Subclass Progress Code
// definitions.
//


//
// Computing Unit Host Processor Subclass Progress Code
// definitions.
//
#define EFI_CU_HP_PC_POWER_ON_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CU_HP_PC_CACHE_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_CU_HP_PC_RAM_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_CU_HP_PC_MEMORY_CONTROLLER_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_CU_HP_PC_IO_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_CU_HP_PC_BSP_SELECT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_CU_HP_PC_BSP_RESELECT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000006)
#define EFI_CU_HP_PC_AP_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000007)
#define EFI_CU_HP_PC_SMM_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000008)


//
// Computing Unit Firmware Processor Subclass Progress Code
// definitions.
//


//
// Computing Unit IO Processor Subclass Progress Code
// definitions.
//


//
// Computing Unit Cache Subclass Progress Code definitions.
//
#define EFI_CU_CACHE_PC_PRESENCE_DETECT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CU_CACHE_PC_CONFIGURATION \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)


//
// Computing Unit Memory Subclass Progress Code definitions.
//
#define EFI_CU_MEMORY_PC_SPD_READ \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CU_MEMORY_PC_PRESENCE_DETECT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_CU_MEMORY_PC_TIMING \
   (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_CU_MEMORY_PC_CONFIGURING \
   (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_CU_MEMORY_PC_OPTIMIZING \
   (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_CU_MEMORY_PC_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_CU_MEMORY_PC_TEST \
   (EFI_SUBCLASS_SPECIFIC | 0x00000006)


//
// Computing Unit Chipset Subclass Progress Code definitions.
//
#define EFI_CHIPSET_PC_PEI_CAR_SB_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CHIPSET_PC_PEI_CAR_NB_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_CHIPSET_PC_PEI_MEM_SB_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_CHIPSET_PC_PEI_MEM_NB_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_CHIPSET_PC_DXE_HB_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_CHIPSET_PC_DXE_NB_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_CHIPSET_PC_DXE_NB_SMM_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000006)
#define EFI_CHIPSET_PC_DXE_SB_RT_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000007)
#define EFI_CHIPSET_PC_DXE_SB_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000008)
#define EFI_CHIPSET_PC_DXE_SB_SMM_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000009)
#define EFI_CHIPSET_PC_DXE_SB_DEVICES_INIT \
   (EFI_SUBCLASS_SPECIFIC | 0x0000000A)

6.7.1.3. Error Code Definitions¶

Summary

Error code definitions for the Computing Unit class and all subclasses. See Error Code Operations in Computing Unit Class for descriptions of these error codes.

The following subclasses define additional subclass-specific error code operations, which are included below:

Host processor
Firmware processor
Cache
Memory

Prototype

//
// Computing Unit Class Error Code definitions.
// These are shared by all subclasses.
//
#define EFI_CU_EC_NON_SPECIFIC       0x00000000
#define EFI_CU_EC_DISABLED           0x00000001
#define EFI_CU_EC_NOT_SUPPORTED      0x00000002
#define EFI_CU_EC_NOT_DETECTED       0x00000003
#define EFI_CU_EC_NOT_CONFIGURED     0x00000004


//
// Computing Unit Unspecified Subclass Error Code definitions.
//


//
// Computing Unit Host Processor Subclass Error Code definitions.
//
#define EFI_CU_HP_EC_INVALID_TYPE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CU_HP_EC_INVALID_SPEED \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_CU_HP_EC_MISMATCH \
   (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_CU_HP_EC_TIMER_EXPIRED \
   (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_CU_HP_EC_SELF_TEST \
   (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_CU_HP_EC_INTERNAL \
   (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_CU_HP_EC_THERMAL \
   (EFI_SUBCLASS_SPECIFIC | 0x00000006)
#define EFI_CU_HP_EC_LOW_VOLTAGE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000007)
#define EFI_CU_HP_EC_HIGH_VOLTAGE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000008)
#define EFI_CU_HP_EC_CACHE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000009)
#define EFI_CU_HP_EC_MICROCODE_UPDATE \
   (EFI_SUBCLASS_SPECIFIC | 0x0000000A)
#define EFI_CU_HP_EC_CORRECTABLE \
   (EFI_SUBCLASS_SPECIFIC | 0x0000000B)
#define EFI_CU_HP_EC_UNCORRECTABLE \
   (EFI_SUBCLASS_SPECIFIC | 0x0000000C)
#define EFI_CU_HP_EC_NO_MICROCODE_UPDATE \
   (EFI_SUBCLASS_SPECIFIC | 0x0000000D)


//
// Computing Unit Firmware Processor Subclass Error Code
// definitions.
//
#define EFI_CU_FP_EC_HARD_FAIL \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CU_FP_EC_SOFT_FAIL \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_CU_FP_EC_COMM_ERROR \
   (EFI_SUBCLASS_SPECIFIC | 0x00000002)


//
// Computing Unit IO Processor Subclass Error Code definitions.
//


//
// Computing Unit Cache Subclass Error Code definitions.
//
#define EFI_CU_CACHE_EC_INVALID_TYPE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CU_CACHE_EC_INVALID_SPEED \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_CU_CACHE_EC_INVALID_SIZE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_CU_CACHE_EC_MISMATCH \
   (EFI_SUBCLASS_SPECIFIC | 0x00000003)


//
// Computing Unit Memory Subclass Error Code definitions.
//
#define EFI_CU_MEMORY_EC_INVALID_TYPE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CU_MEMORY_EC_INVALID_SPEED \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_CU_MEMORY_EC_CORRECTABLE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_CU_MEMORY_EC_UNCORRECTABLE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_CU_MEMORY_EC_SPD_FAIL \
   (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_CU_MEMORY_EC_INVALID_SIZE \
   (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_CU_MEMORY_EC_MISMATCH \
   (EFI_SUBCLASS_SPECIFIC | 0x00000006)
#define EFI_CU_MEMORY_EC_S3_RESUME_FAIL\
   (EFI_SUBCLASS_SPECIFIC | 0x00000007)
#define EFI_CU_MEMORY_EC_UPDATE_FAIL \
   (EFI_SUBCLASS_SPECIFIC | 0x00000008)
#define EFI_CU_MEMORY_EC_NONE_DETECTED \
   (EFI_SUBCLASS_SPECIFIC | 0x00000009)
#define EFI_CU_MEMORY_EC_NONE_USEFUL \
   (EFI_SUBCLASS_SPECIFIC | 0x0000000A)


//
// Computing Unit Chipset Subclass Error Code definitions.
//
#define EFI_CHIPSET_EC_BAD_BATTERY \
   (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_CHIPSET_EC_DXE_NB_ERROR \
   (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_CHIPSET_EC_DXE_SB_ERROR \
   (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_CHIPSET_EC_INTRUDER_DETECT \
   (EFI_SUBCLASS_SPECIFIC | 0x00000003)

6.7.1.4. Extended Data Formats¶

6.7.1.4.1. Host Processor Subclass¶

6.7.1.5. EFI_COMPUTING_UNIT_VOLTAGE_ERROR_DATA¶

Summary

This structure provides details about the computing unit voltage error.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA               DataHeader;
  EFI_EXP_BASE10_DATA                Voltage;
  EFI_EXP_BASE10_DATA                Threshold;
} EFI_COMPUTING_UNIT_VOLTAGE_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA), DataHeader.Size should be sizeof (EFI_COMPUTING_UNIT_VOLTAGE_ERROR_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

Voltage: The voltage value at the time of the error.

Threshold: The voltage threshold.

Description

This structure provides the voltage at the time of error. It also provides the threshold value indicating the minimum or maximum voltage that is considered an error. If the voltage is less than the threshold, the error indicates that the voltage fell below the minimum acceptable value. If the voltage is greater than the threshold, the error indicates that the voltage rose above the maximum acceptable value.

6.7.1.6. EFI_COMPUTING_UNIT_MICROCODE_UPDATE_ERROR_DATA¶

Summary

This structure provides details about the microcode update error.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA           DataHeader;
  UINT32                         Version;
} EFI_COMPUTING_UNIT_MICROCODE_UPDATE_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA), DataHeader.Size should be sizeof (EFI_COMPUTING_UNIT_MICROCODE_UPDATE_ERROR_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

Version: The version of the microcode update from the header.

6.7.1.7. EFI_COMPUTING_UNIT_TIMER_EXPIRED_ERROR_DATA¶

Summary

This structure provides details about the computing unit timer expiration error.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA DataHeader;
  EFI_EXP_BASE10_DATA TimerLimit;
} EFI_COMPUTING_UNIT_TIMER_EXPIRED_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA), DataHeader.Size should be sizeof (EFI_COMPUTING_UNIT_TIMER_EXPIRED_ERROR_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

TimerLimit: The number of seconds that the computing unit timer was configured to expire.

Description

The timer limit provides the timeout value of the timer prior to expiration.

6.7.1.8. EFI_HOST_PROCESSOR_MISMATCH_ERROR_DATA¶

Summary

This structure defines extended data for processor mismatch errors.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA         DataHeader;
  UINT32                       Instance;
  UINT16                       Attributes;
} EFI_HOST_PROCESSOR_MISMATCH_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI\_ HOST_PROCESSOR_MISMATCH_ERROR_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

Instance: The unit number of the computing unit that does not match.

Attributes: The attributes describing the failure. See “Related Definitions” below for the type declarations.

Description

This provides information to indicate which processors mismatch, and how they mismatch. The status code contains the instance number of the processor that is in error. This structure’s Instance indicates the second processor that does not match. This differentiation allows the consumer to determine which two processors do not match. The Attributes indicate what mismatch is being reported. Because Attributes is a bit field, more than one mismatch can be reported with one error code.

//***********************************************************
// EFI_COMPUTING_UNIT_MISMATCH_ATTRIBUTES
//***********************************************************
//
// All other attributes are reserved for future use and
// must be initialized to 0.
//
#define EFI_COMPUTING_UNIT_MISMATCH_SPEED      0x0001
#define EFI_COMPUTING_UNIT_MISMATCH_FSB_SPEED  0x0002
#define EFI_COMPUTING_UNIT_MISMATCH_FAMILY     0x0004
#define EFI_COMPUTING_UNIT_MISMATCH_MODEL      0x0008
#define EFI_COMPUTING_UNIT_MISMATCH_STEPPING   0x0010
#define EFI_COMPUTING_UNIT_MISMATCH_CACHE_SIZE 0x0020
#define EFI_COMPUTING_UNIT_MISMATCH_OEM1       0x1000
#define EFI_COMPUTING_UNIT_MISMATCH_OEM2       0x2000
#define EFI_COMPUTING_UNIT_MISMATCH_OEM3       0x4000
#define EFI_COMPUTING_UNIT_MISMATCH_OEM4       0x8000

6.7.1.9. EFI_COMPUTING_UNIT_THERMAL_ERROR_DATA¶

Summary

This structure provides details about the computing unit thermal failure.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA           DataHeader;
  EFI_EXP_BASE10_DATA            Temperature;
  EFI_EXP_BASE10_DATA            Threshold;
} EFI_COMPUTING_UNIT_THERMAL_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_COMPUTING_UNIT_THERMAL_ERROR_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

Temperature: The thermal value at the time of the error.

Threshold: The thermal threshold.

Description

This structure provides the temperature at the time of error. It also provides the threshold value indicating the minimum temperature that is considered an error.

6.7.1.10. EFI_CACHE_INIT_DATA¶

Summary

This structure provides cache initialization data.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA   DataHeader;
  UINT32                 Level;
  EFI_INIT_CACHE_TYPE    Type;
} EFI_CACHE_INIT_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof ( EFI_STATUS_CODE_DATA ), DataHeader.Size should be sizeof (EFI_CACHE_INIT_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

Level: The cache level. Starts with 1 for level 1 cache.

Type: The type of cache. Type EFI_INIT_CACHE_TYPE is defined in “Related Definitions” below.

Description

This structure contains the cache level and type information.

//***********************************************
// EFI_INIT_CACHE_TYPE
//***********************************************

// Valid cache types

typedef enum {
  EfiInitCacheDataOnly,
  EfiInitCacheInstrOnly,
  EfiInitCacheBoth,
  EfiInitCacheUnspecified
} EFI_INIT_CACHE_TYPE;

6.7.1.11. EFI_COMPUTING_UNIT_CPU_DISABLED_ERROR_DATA¶

Summary

This structure provides information about the disabled computing unit.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA         DataHeader;
  UINT32                       Cause;
  BOOLEAN                      SoftwareDisabled*;
} EFI_COMPUTING_UNIT_CPU_DISABLED_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_COMPUTING_UNIT_CPU_DISABLED_ERROR_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

Cause: The reason for disabling the processor. See “Related Definitions” below for defined values.

SoftwareDisabled: TRUE if the processor is disabled via software means such as not listing it in the ACPI tables. Such a processor will respond to Interprocessor Interrupts (IPIs). FALSE if the processor is hardware disabled, which means it is invisible to software and will not respond to IPIs.

Description

This structure provides details as to why and how the computing unit was disabled. The causes should cover the typical reasons a processor would be disabled. How the processor was disabled is important because there are distinct differences between hardware and software disabling.

//************************************************************
// EFI_CPU_STATE_CHANGE_CAUSE
//************************************************************
typedef UINT32 EFI_CPU_STATE_CHANGE_CAUSE;

//
// The reason a processor was disabled
//
#define EFI_CPU_CAUSE_INTERNAL_ERROR         0x0001
#define EFI_CPU_CAUSE_THERMAL_ERROR          0x0002
#define EFI_CPU_CAUSE_SELFTEST_FAILURE       0x0004
#define EFI_CPU_CAUSE_PREBOOT_TIMEOUT        0x0008
#define EFI_CPU_CAUSE_FAILED_TO_START        0x0010
#define EFI_CPU_CAUSE_CONFIG_ERROR           0x0020
#define EFI_CPU_CAUSE_USER_SELECTION         0x0080
#define EFI_CPU_CAUSE_BY_ASSOCIATION         0x0100
#define EFI_CPU_CAUSE_UNSPECIFIED            0x8000

Table 6.67 Decription of EFI_CPU_STATE_CHANGE_CAUSE fields¶
EFI_CPU_CAUSE_INTERNAL_ERROR	The processor was disabled because it signaled an internal error (IERR).
EFI_CPU_CAUSE_THERMAL_ERROR	The processor was disabled because of a thermal error.
EFI_CPU_CAUSE_SELFTEST_FAILURE	The processor was disabled because it failed BIST.
EFI_CPU_CAUSE_PREBOOT_TIMEOUT	The processor started execution, but it timed out during a particular task and was therefore disabled.
EFI_CPU_CAUSE_FAILED_TO_START	The processor was disabled because it failed to start execution (FRB-3 timeout).
EFI_CPU_CAUSE_CONFIG_ERROR	The processor was disabled due to a configuration error.
EFI_CPU_CAUSE_USER_SELECTION	The processor state was changed due to user selection. Applicable to enabling and disabling of processors.
EFI_CPU_CAUSE_BY_ASSOCIATION	The processor state was changed due because it shared the state with another processor and the state of the other processor was changed.
EFI_CPU_CAUSE_UNSPECIFIED	The CPU state was changed due to unspecified reason. Applicable to enabling and disabling of processors.

Summary

6.7.1.12. EFI_MEMORY_EXTENDED_ERROR_DATA¶

Summary

This structure defines extended data describing a memory error.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA           DataHeader;
  EFI_MEMORY_ERROR_GRANULARITY   Granularity;
  EFI_MEMORY_ERROR_OPERATION     Operation;
  UINT32                         Syndrome;
  EFI_PHYSICAL_ADDRESS           Address;
  UINTN                          Resolution;
} EFI_MEMORY_EXTENDED_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_MEMORY_EXTENDED_ERROR_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

Granularity: The error granularity type. Type EFI_MEMORY_ERROR_GRANULARITY is defined in “Related Definitions” below.

Operation: The operation that resulted in the error being detected. Type EFI_MEMORY_ERROR_OPERATION is defined in “Related Definitions” below.

Syndrome: The error syndrome, vendor-specific ECC syndrome, or CRC data associated with the error. If unknown, should be initialized to 0.

Address: The physical address of the error. Type EFI_PHYSICAL_ADDRESS is defined in AllocatePages() in the UEFI Specification .

Resolution: The range, in bytes, within which the error address can be determined.

Description

This structure provides specific details about the memory error that was detected. It provides enough information so that consumers can identify the exact failure and provides enough information to enable corrective action if necessary.

//*********************************************************
// EFI_MEMORY_ERROR_GRANULARITY
//*********************************************************
typedef UINT8 EFI_MEMORY_ERROR_GRANULARITY;

//
// Memory Error Granularities
//
#define EFI_MEMORY_ERROR_OTHER                   0x01
#define EFI_MEMORY_ERROR_UNKNOWN                 0x02
#define EFI_MEMORY_ERROR_DEVICE                  0x03
#define EFI_MEMORY_ERROR_PARTITION               0x04


//*********************************************************
// EFI_MEMORY_ERROR_OPERATION
//*********************************************************
typedef UINT8 EFI_MEMORY_ERROR_OPERATION;

//
// Memory Error Operations
//
#define EFI_MEMORY_OPERATION_OTHER               0x01
#define EFI_MEMORY_OPERATION_UNKNOWN             0x02
#define EFI_MEMORY_OPERATION_READ                0x03
#define EFI_MEMORY_OPERATION_WRITE               0x04
#define EFI_MEMORY_OPERATION_PARTIAL_WRITE       0x05

6.7.1.13. EFI_STATUS_CODE_DIMM_NUMBER¶

Summary

This structure defines extended data describing a DIMM.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA       DataHeader;
  UINT16                     Array;
  UINT16                     Device;
} EFI_STATUS_CODE_DIMM_NUMBER;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA), DataHeader.Size should be sizeof (EFI_STATUS_CODE_DIMM_NUMBER) - HeaderSize, and DataHeader. Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

Array: The memory array number.

Device: The device number within that Array.

Description

This extended data provides some context that consumers can use to locate a DIMM within the overall memory scheme. The Array and Device numbers may indicate a specific DIMM, or they may be populated with the group definitions in “Related Definitions” below.

//
// Definitions to describe Group Operations
// Many memory init operations are essentially group
// operations.
//
#define EFI_MULTIPLE_MEMORY_DEVICE_OPERATION     0xfffe
#define EFI_ALL_MEMORY_DEVICE_OPERATION          0xffff
#define EFI_MULTIPLE_MEMORY_ARRAY_OPERATION      0xfffe
#define EFI_ALL_MEMORY_ARRAY_OPERATION           0xffff

Table 6.68 Definitions to describe Group Operations¶
EFI_MULTIPLE_MEMORY_DEVICE_OPERATION	A definition to describe that the operation is performed on multiple devices within the array.
EFI_ALL_MEMORY_DEVICE_OPERATION	A definition to describe that the operation is performed on all devices within the array.
EFI _MULTIPLE_MEMORY_ARRAY_OPERATION	A definition to describe that the operation is performed on multiple arrays.
EFI_ALL_MEMORY_ARRAY_OPERATION	A definition to describe that the operation is performed on all the arrays.

6.7.1.14. EFI_MEMORY_MODULE_MISMATCH_ERROR_DATA¶

Summary

This structure defines extended data describing memory modules that do not match.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA           DataHeader;
  EFI_STATUS_CODE_DIMM_NUMBER    Instance;
} EFI_MEMORY_MODULE_MISMATCH_ERROR_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_MEMORY_MODULE_MISMATCH_ERROR_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

Instance: The instance number of the memory module that does not match. See the definition for type EFI_STATUS_CODE_DIMM_NUMBER .

Description

This extended data may be used to convey the specifics of memory modules that do not match.

6.7.1.15. EFI_MEMORY_RANGE_EXTENDED_DATA¶

Summary

This structure defines extended data describing a memory range.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA       DataHeader;
  EFI_PHYSICAL_ADDRESS       Start;
  EFI_PHYSICAL_ADDRESS       Length;
} EFI_MEMORY_RANGE_EXTENDED_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_MEMORY_RANGE_EXTENDED_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID.

Start: The starting address of the memory range. Type EFI_PHYSICAL_ADDRESS is defined in AllocatePages() in the UEFI Specification .

Length: The length in bytes of the memory range.

Description

This extended data may be used to convey the specifics of a memory range. Ranges are specified with a start address and a length.

6.7.2. User-Accessible Peripherals Class¶

The table below lists the subclasses defined in the User-Accessible Peripheral class. See the following subsection for their code definitions.

Table 6.69 Defined Subclasses: User-Accessible Peripheral Class¶
Subclass	Code Name
Unspecified	EFI_PERIPHERAL_UNSPECIFIED
Keyboard	EFI_PERIPHERAL_KEYBOARD
Mouse	EFI_PERIPHERAL_MOUSE
Local console	EFI_PERIPHERAL_LOCAL_CONSOLE
Remote console	EFI_PERIPHERAL_REMOTE_CONSOLE
Serial port	EFI_PERIPHERAL_SERIAL_PORT
Parallel port	EFI_PERIPHERAL_PARALLEL_PORT
Fixed media	EFI_PERIPHERAL_FIXED_MEDIA
Removable media	EFI_PERIPHERAL_REMOVABLE_MEDIA
Audio input	EFI_PERIPHERAL_AUDIO_INPUT
Audio output	EFI_PERIPHERAL_AUDIO_OUTPUT
LCD device	EFI_PERIPHERAL_LCD_DEVICE
Network device	EFI_PERIPHERAL_NETWORK
Docking Station	EFI_PERIPHERAL_DOCKING
Trusted Platform Module	EFI_PERIPHERAL_TPM
0x0F-0x7F	Reserved for future use by this specification.
0x80-0xFF	Reserved for OEM use.

6.7.2.1. Subclass Definitions¶

Summary

Definitions for the User-Accessible Peripheral subclasses. See Subclasses in User-Accessible Peripherals Class for descriptions of these subclasses.

Prototype

//
// Peripheral Subclass definitions.
// Values of 12-127 are reserved for future use by this
// specification.
// Values of 128-255 are reserved for OEM use.
//
#define EFI_PERIPHERAL_UNSPECIFIED \
    (EFI_PERIPHERAL | 0x00000000)
#define EFI_PERIPHERAL_KEYBOARD \
    (EFI_PERIPHERAL | 0x00010000)
#define EFI_PERIPHERAL_MOUSE \
    (EFI_PERIPHERAL | 0x00020000)
#define EFI_PERIPHERAL_LOCAL_CONSOLE \
    (EFI_PERIPHERAL | 0x00030000)
#define EFI_PERIPHERAL_REMOTE_CONSOLE \
    (EFI_PERIPHERAL | 0x00040000)
#define EFI_PERIPHERAL_SERIAL_PORT \
    (EFI_PERIPHERAL | 0x00050000)
#define EFI_PERIPHERAL_PARALLEL_PORT \
    (EFI_PERIPHERAL | 0x00060000)
#define EFI_PERIPHERAL_FIXED_MEDIA \
    (EFI_PERIPHERAL | 0x00070000)
#define EFI_PERIPHERAL_REMOVABLE_MEDIA \
    (EFI_PERIPHERAL | 0x00080000)
#define EFI_PERIPHERAL_AUDIO_INPUT \
    (EFI_PERIPHERAL | 0x00090000)
#define EFI_PERIPHERAL_AUDIO_OUTPUT \
    (EFI_PERIPHERAL | 0x000A0000)
#define EFI_PERIPHERAL_LCD_DEVICE \
    (EFI_PERIPHERAL | 0x000B0000)
#define EFI_PERIPHERAL_NETWORK \
    (EFI_PERIPHERAL | 0x000C0000)
#define EFI_PERIPHERAL_DOCKING \
    (EFI_PERIPHERAL | 0x000D0000)
#define EFI_PERIPHERAL_TPM \
    (EFI_PERIPHERAL | 0x000E0000)

6.7.2.2. Progress Code Definitions¶

Summary

Progress code definitions for the User-Accessible Peripheral class and all subclasses. See Progress Code Operations in User-Accessible Peripherals Class for descriptions of these progress codes.

The following subclasses define additional subclass-specific progress code operations, which are included below:

Keyboard
Mouse
Serial port

Prototype

//
// Peripheral Class Progress Code definitions.
// These are shared by all subclasses.
//
#define EFI_P_PC_INIT                   0x00000000
#define EFI_P_PC_RESET                  0x00000001
#define EFI_P_PC_DISABLE                0x00000002
#define EFI_P_PC_PRESENCE_DETECT        0x00000003
#define EFI_P_PC_ENABLE                 0x00000004
#define EFI_P_PC_RECONFIG               0x00000005
#define EFI_P_PC_DETECTED               0x00000006
#define EFI_P_PC_REMOVED                0x00000007


//
// Peripheral Class Unspecified Subclass Progress Code
// definitions.
//


//
// Peripheral Class Keyboard Subclass Progress Code definitions.
//
#define EFI_P_KEYBOARD_PC_CLEAR_BUFFER \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_P_KEYBOARD_PC_SELF_TEST \
    (EFI_SUBCLASS_SPECIFIC | 0x00000001)


//
// Peripheral Class Mouse Subclass Progress Code definitions.
//
#define EFI_P_MOUSE_PC_SELF_TEST \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)


//
// Peripheral Class Local Console Subclass Progress Code
// definitions.
//


//
// Peripheral Class Remote Console Subclass Progress Code
// definitions.
//


//
// Peripheral Class Serial Port Subclass Progress Code
// definitions.
//
#define EFI_P_SERIAL_PORT_PC_CLEAR_BUFFER \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)


//
// Peripheral Class Parallel Port Subclass Progress Code
// definitions.
//


//
// Peripheral Class Fixed Media Subclass Progress Code
// definitions.
//


//
// Peripheral Class Removable Media Subclass Progress Code
// definitions.
//


//
// Peripheral Class Audio Input Subclass Progress Code
// definitions.
//


//
// Peripheral Class Audio Output Subclass Progress Code
// definitions.
//


//
// Peripheral Class LCD Device Subclass Progress Code
// definitions.
//


//
// Peripheral Class Network Subclass Progress Code definitions.
//

6.7.2.3. Error Code Definitions¶

Summary

Error code definitions for the User-Accessible Peripheral class and all subclasses. See Error Code Operations in User-Accessible Peripherals Class for descriptions of these error codes.

The following subclasses define additional subclass-specific error code operations, which are included below:

Keyboard
Mouse

Prototype

//
// Peripheral Class Error Code definitions.
// These are shared by all subclasses.
//
#define EFI_P_EC_NON_SPECIFIC       0x00000000
#define EFI_P_EC_DISABLED           0x00000001
#define EFI_P_EC_NOT_SUPPORTED      0x00000002
#define EFI_P_EC_NOT_DETECTED       0x00000003
#define EFI_P_EC_NOT_CONFIGURED     0x00000004
#define EFI_P_EC_INTERFACE_ERROR    0x00000005
#define EFI_P_EC_CONTROLLER_ERROR   0x00000006
#define EFI_P_EC_INPUT_ERROR        0x00000007
#define EFI_P_EC_OUTPUT_ERROR       0x00000008
#define EFI_P_EC_RESOURCE_CONFLICT \
  0x00000009


//
// Peripheral Class Unspecified Subclass Error Code definitions.
//


//
// Peripheral Class Keyboard Subclass Error Code definitions.
//
#define EFI_P_KEYBOARD_EC_LOCKED \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_P_KEYBOARD_EC_STUCK_KEY \
    (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_P_KEYBOARD_EC_BUFFER_FULL \
    (EFI_SUBCLASS_SPECIFIC | 0x00000002)


//
// Peripheral Class Mouse Subclass Error Code definitions.
//
#define EFI_P_MOUSE_EC_LOCKED \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)


//
// Peripheral Class Local Console Subclass Error Code
// definitions.
//


//
// Peripheral Class Remote Console Subclass Error Code
// definitions.
//


//
// Peripheral Class Serial Port Subclass Error Code definitions.
//


//
// Peripheral Class Parallel Port Subclass Error Code
// definitions.
//


//
// Peripheral Class Fixed Media Subclass Error Code definitions.
//


//
// Peripheral Class Removable Media Subclass Error Code
// definitions.
//


//
// Peripheral Class Audio Input Subclass Error Code definitions.
//


//
// Peripheral Class Audio Output Subclass Error Code
// definitions.
//


//
// Peripheral Class LCD Device Subclass Error Code definitions.
//


//
// Peripheral Class Network Subclass Error Code definitions.
//

6.7.2.4. Extended Data Formats¶

The User-Accessible Peripheral class uses the following extended error data definitions:

EFI_DEVICE_PATH_EXTENDED_DATA
EFI_RESOURCE_ALLOC_FAILURE_ERROR_DATA

See Common Extended Data Formats for definitions.

6.7.3. I/O Bus Class¶

The table below lists the subclasses defined in the I/O Bus class. See Subclass Definitions for their code definitions.

Table 6.70 Defined Subclasses: I/O Bus Class¶
Subclass	Code Name
Unspecified	EFI_IO_BUS_UNSPECIFIED
PCI	EFI_IO_BUS_PCI
USB	EFI_IO_BUS_USB
InfiniBand* architecture	EFI_IO_BUS_IBA
AGP	EFI_IO_BUS_AGP
PC card	EFI_IO_BUS_PC_CARD
Low pin count (LPC)	EFI_IO_BUS_LPC
SCSI	EFI_IO_BUS_SCSI
ATA/ATAPI/SATA	EFI_IO_BUS_ATA_ATAPI
Fibre Channel	EFI_IO_BUS_FC
IP network	EFI_IO_BUS_IP_NETWORK
SMBus	EFI_IO_BUS_SMBUS
I2C	EFI_IO_BUS_I2C
0x0D-0x7F	Reserved for future use by this specification.
0x80-0xFF	Reserved for OEM use.

6.7.3.1. Subclass Definitions¶

Summary

Definitions for the I/O Bus subclasses. See Subclasses in I/O Bus Class for descriptions of these subclasses.

Prototype

//
// IO Bus Subclass definitions.
// Values of 14-127 are reserved for future use by this
// specification.
// Values of 128-255 are reserved for OEM use.
//
#define EFI_IO_BUS_UNSPECIFIED \
    (EFI_IO_BUS | 0x00000000)
#define EFI_IO_BUS_PCI \
    (EFI_IO_BUS | 0x00010000)
#define EFI_IO_BUS_USB \
    (EFI_IO_BUS | 0x00020000)
#define EFI_IO_BUS_IBA \
    (EFI_IO_BUS | 0x00030000)
#define EFI_IO_BUS_AGP \
    (EFI_IO_BUS | 0x00040000)
#define EFI_IO_BUS_PC_CARD \
    (EFI_IO_BUS | 0x00050000)
#define EFI_IO_BUS_LPC \
    (EFI_IO_BUS | 0x00060000)
#define EFI_IO_BUS_SCSI \
    (EFI_IO_BUS | 0x00070000)
#define EFI_IO_BUS_ATA_ATAPI \
    (EFI_IO_BUS | 0x00080000)
#define EFI_IO_BUS_FC \
    (EFI_IO_BUS | 0x00090000)
#define EFI_IO_BUS_IP_NETWORK \
    (EFI_IO_BUS | 0x000A0000)
#define EFI_IO_BUS_SMBUS \
    (EFI_IO_BUS | 0x000B0000)
#define EFI_IO_BUS_I2C \
    (EFI_IO_BUS | 0x000C0000)

6.7.3.2. Progress Code Definitions¶

Summary

Progress code definitions for the I/O Bus class and all subclasses. See Progress Code Operations in User-Accessible Peripherals Class for descriptions of these progress codes.

The following subclasses define additional subclass-specific progress code operations, which are included below:

PCI

Prototype

//
// IO Bus Class Progress Code definitions.
// These are shared by all subclasses.
//
typedef struct _EFI_SIO_PROTOCOL EFI_SIO_PROTOCOL;

#define EFI_IOB_PC_INIT           0x00000000
#define EFI_IOB_PC_RESET          0x00000001
#define EFI_IOB_PC_DISABLE        0x00000002
#define EFI_IOB_PC_DETECT         0x00000003
#define EFI_IOB_PC_ENABLE         0x00000004
#define EFI_IOB_PC_RECONFIG       0x00000005
#define EFI_IOB_PC_HOTPLUG        0x00000006

//
// IO Bus Class Unspecified Subclass Progress Code definitions.
//

//
// IO Bus Class PCI Subclass Progress Code definitions.
//
#define EFI_IOB_PCI_BUS_ENUM \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_IOB_PCI_RES_ALLOC \
    (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#defineEFI_IOB_PCI_HPC_INIT \
    (EFI_SUBCLASS_SPECIFIC | 0x00000002)

//
// IO Bus Class USB Subclass Progress Code definitions.
//


//
// IO Bus Class IBA Subclass Progress Code definitions.
//


//
// IO Bus Class AGP Subclass Progress Code definitions.
//


//
// IO Bus Class PC Card Subclass Progress Code definitions.
//


//
// IO Bus Class LPC Subclass Progress Code definitions.
//


//
// IO Bus Class SCSI Subclass Progress Code definitions.
//


//
// IO Bus Class ATA/ATAPI Subclass Progress Code definitions.
//
#define EFI_IOB_ATA_BUS_SMART_ENABLE \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_IOB_ATA_BUS_SMART_DISABLE \
    (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_IOB_ATA_BUS_SMART_OVERTHRESHOLD \
    (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_IOB_ATA_BUS_SMART_UNDERTHRESHOLD \
    (EFI_SUBCLASS_SPECIFIC | 0x00000003)

//
// IO Bus Class FC Subclass Progress Code definitions.
//


//
// IO Bus Class IP Network Subclass Progress Code definitions.
//


//
// IO Bus Class SMBUS Subclass Progress Code definitions.
//


//
// IO Bus Class I2C Subclass Progress Code definitions.
//

6.7.3.3. Error Code Definitions¶

Summary

Error code definitions for the I/O Bus class and all subclasses. See Error Code Operations in User-Accessible Peripherals Class for descriptions of these error codes.

The following subclasses define additional subclass-specific error code operations, which are included below:

PCI

Prototype

// IO Bus Class Error Code definitions.
// These are shared by all subclasses.
//
#define EFI_IOB_EC_NON_SPECIFIC       0x00000000
#define EFI_IOB_EC_DISABLED           0x00000001
#define EFI_IOB_EC_NOT_SUPPORTED      0x00000002
#define EFI_IOB_EC_NOT_DETECTED       0x00000003
#define EFI_IOB_EC_NOT_CONFIGURED     0x00000004
#define EFI_IOB_EC_INTERFACE_ERROR    0x00000005
#define EFI_IOB_EC_CONTROLLER_ERROR   0x00000006
#define EFI_IOB_EC_READ_ERROR         0x00000007
#define EFI_IOB_EC_WRITE_ERROR        0x00000008
#define EFI_IOB_EC_RESOURCE_CONFLICT  0x00000009


//
// IO Bus Class Unspecified Subclass Error Code definitions.
//


//
// IO Bus Class PCI Subclass Error Code definitions.
//
#define EFI_IOB_PCI_EC_PERR \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_IOB_PCI_EC_SERR \
    (EFI_SUBCLASS_SPECIFIC | 0x00000001)


//
// IO Bus Class USB Subclass Error Code definitions.
//


//
// IO Bus Class IBA Subclass Error Code definitions.
//


//
// IO Bus Class AGP Subclass Error Code definitions.
//


//
// IO Bus Class PC Card Subclass Error Code definitions.
//


//
// IO Bus Class LPC Subclass Error Code definitions.
//


//
// IO Bus Class SCSI Subclass Error Code definitions.
//


//
// IO Bus Class ATA/ATAPI Subclass Error Code definitions.
//
#define EFI_IOB_ATA_BUS_SMART_NOTSUPPORTED \
    (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_IOB_ATA_BUS_SMART_DISABLED \
    (EFI_SUBCLASS_SPECIFIC | 0x00000001)


//
// IO Bus Class FC Subclass Error Code definitions.
//


//
// IO Bus Class IP Network Subclass Error Code definitions.
//


//
// IO Bus Class SMBUS Subclass Error Code definitions.
//


//
// IO Bus Class I2C Subclass Error Code definitions.
//

6.7.3.4. Extended Data Formats¶

The I/O Bus class uses the following extended data definitions:

EFI_DEVICE_PATH_EXTENDED_DATA
EFI_DEVICE_HANDLE_EXTENDED_DATA
EFI_RESOURCE_ALLOC_FAILURE_ERROR_DATA

See Common Extended Data Formats for definitions.

6.7.4. Software Classes¶

The table below lists the subclasses defined in the Host Software class. See Subclass Definitions for their code definitions.

Table 6.71 Defined Subclasses: Host Software Class¶
Subclass	Code Name
Unspecified	EFI_SOFTWARE_UNSPECIFIED
Security (SEC)	EFI_SOFTWARE_SEC
PEI Foundation	EFI_SOFTWARE_PEI_CORE
PEI module	EFI_SOFTWARE_PEI_MODULE
DXE Foundation	EFI_SOFTWARE_DXE_CORE
DXE Boot Service driver	EFI_SOFTWARE_DXE_BS_DRIVER
DXE Runtime Service driver	EFI_SOFTWARE_DXE_RT_DRIVER
SMM driver	EFI_SOFTWARE_SMM_DRIVER
EFI application	EFI_SOFTWARE_EFI_APPLICATION
OS loader	EFI_SOFTWARE_EFI_OS_LOADER
Runtime (RT)	EFI_SOFTWARE_EFI_RT
EBC exception	EFI_SOFTWARE_EBC_EXCEPTION
IA 32 exception	EFI_SOFTWARE_IA32_EXCEPTION
Itanium processor family exception	EFI_SOFTWARE_IPF_EXCEPTION
PEI Services	EFI_SOFTWARE_PEI_SERVICE
EFI Boot Service	EFI_SOFTWARE_EFI_BOOT_SERVICE
EFI Runtime Service	EFI_SOFTWARE_EFI_RUNTIME_SERVICE
DXE Service	EFI_SOFTWARE_EFI_DXE_SERVICE
0x13 0x7F	Reserved for future use by this specification.
0x80 0xFF	Reserved for OEM use.
x64 software exception	EFI_SOFTWARE_X64_EXCEPTION
ARM AArch32 software exception	EFI_SOFTWARE_ARM_EXCEPTION
ARM AArch64 software exception	EFI_SOFTWARE_AARCH64_EXCEPTION
RISC V software exception	EFI_SOFTWARE_RISCV_EXCEPTION

6.7.4.1. Subclass Definitions¶

Summary

Definitions for the Host Software subclasses. See Subclasses in Host Software Class for descriptions of these subclasses.

Prototype

//
// Software Subclass definitions.
// Values of 14-127 are reserved for future use by this
// specification.
// Values of 128-255 are reserved for OEM use.
//
#define EFI_SOFTWARE_UNSPECIFIED \
  (EFI_SOFTWARE | 0x00000000)
#define EFI_SOFTWARE_SEC \
  (EFI_SOFTWARE | 0x00010000)
#define EFI_SOFTWARE_PEI_CORE \
  (EFI_SOFTWARE | 0x00020000)
#define EFI_SOFTWARE_PEI_MODULE \
  (EFI_SOFTWARE | 0x00030000)
#define EFI_SOFTWARE_DXE_CORE \
  (EFI_SOFTWARE | 0x00040000)
#define EFI_SOFTWARE_DXE_BS_DRIVER \
  (EFI_SOFTWARE | 0x00050000)
#define EFI_SOFTWARE_DXE_RT_DRIVER \
  (EFI_SOFTWARE | 0x00060000)
#define EFI_SOFTWARE_SMM_DRIVER \
  (EFI_SOFTWARE | 0x00070000)
#define EFI_SOFTWARE_EFI_APPLICATION \
  (EFI_SOFTWARE | 0x00080000)
#define EFI_SOFTWARE_EFI_OS_LOADER\
  (EFI_SOFTWARE | 0x00090000)
#define EFI_SOFTWARE_RT \
  (EFI_SOFTWARE | 0x000A0000)
#define EFI_SOFTWARE_AL \
  (EFI_SOFTWARE | 0x000B0000)
#define EFI_SOFTWARE_EBC_EXCEPTION \
  (EFI_SOFTWARE | 0x000C0000)
#define EFI_SOFTWARE_IA32_EXCEPTION \
  (EFI_SOFTWARE | 0x000D0000)
#define EFI_SOFTWARE_IPF_EXCEPTION \
  (EFI_SOFTWARE | 0x000E0000)
#define EFI_SOFTWARE_PEI_SERVICE \
  (EFI_SOFTWARE | 0x000F0000
#define EFI_SOFTWARE_EFI_BOOT_SERVICE \
  (EFI_SOFTWARE | 0x00100000)
#define EFI_SOFTWARE_EFI_RUNTIME_SERVICE \
  (EFI_SOFTWARE | 0x00110000)
#define EFI_SOFTWARE_EFI_DXE_SERVICE \
  (EFI_SOFTWARE | 0x00120000)
#define EFI_SOFTWARE_X64_EXCEPTION \
  (EFI_SOFTWARE | 0x00130000)
#define EFI_SOFTWARE_ARM_EXCEPTION \
  (EFI_SOFTWARE | 0x00140000)
#define EFI_SOFTWARE_AARCH64_EXCEPTION \
  (EFI_SOFTWARE | 0x00150000)

6.7.4.2. Progress Code Definitions¶

Summary

Progress code definitions for the Host Software class and all subclasses. See Table 6.45 for descriptions of these progress codes.

The following subclasses define additional subclass-specific progress code operations, which are included below:

SEC
PEI Foundation
PEI Module
DXE Foundation
DXE Boot Service Driver
Runtime (RT)
PEI Services
Boot Services
Runtime Services
DXE Services

Prototype

//
// Software Class Progress Code definitions.
// These are shared by all subclasses.
//
#define EFI_SW_PC_INIT \
  0x00000000
#define EFI_SW_PC_LOAD \
  0x00000001
#define EFI_SW_PC_INIT_BEGIN \
  0x00000002
#define EFI_SW_PC_INIT_END \
  0x00000003
#define EFI_SW_PC_AUTHENTICATE_BEGIN \
  0x00000004
#define EFI_SW_PC_AUTHENTICATE_END \
  0x00000005
#define EFI_SW_PC_INPUT_WAIT \
  0x00000006
#define EFI_SW_PC_USER_SETUP \
  0x00000007


//
// Software Class Unspecified Subclass Progress Code
// definitions.
//


//
// Software Class SEC Subclass Progress Code definitions.
//
#define EFI_SW_SEC_PC_ENTRY_POINT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_SEC_PC_HANDOFF_TO_NEXT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)


//
// Software Class PEI Foundation Subclass Progress Code
// definitions.
//
#define EFI_SW_PEI_CORE_PC_ENTRY_POINT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_PEI_CORE_PC_HANDOFF_TO_NEXT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_PEI_CORE_PC_RETURN_TO_LAST \
  (EFI_SUBCLASS_SPECIFIC | 0x00000002)


//
// Software Class PEI Module Subclass Progress Code definitions.
//
#define EFI_SW_PEI_PC_RECOVERY_BEGIN \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_PEI_PC_CAPSULE_LOAD \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_PEI_PC_CAPSULE_START \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_PEI_PC_RECOVERY_USER \
  (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_SW_PEI_PC_RECOVERY_AUTO \
  (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_SW_PEI_PC_S3_BOOT_SCRIPT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_SW_PEI_PC_OS_WAKE \
  (EFI_SUBCLASS_SPECIFIC | 0x00000006
#define EFI_SW_PEI_PC_S3_STARTED \
  (EFI_SUBCLASS_SPECIFIC | 0x00000007)


//
// Software Class DXE Foundation Subclass Progress Code
// definitions.
//
#define EFI_SW_DXE_CORE_PC_ENTRY_POINT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_DXE_CORE_PC_HANDOFF_TO_NEXT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_DXE_CORE_PC_RETURN_TO_LAST \
  (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_SW_DXE_CORE_PC_START_DRIVER \
  (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_SW_DXE_CORE_PC_ARCH_READY \
  (EFI_SUBCLASS_SPECIFIC | 0x00000004)

//
// Software Class DXE BS Driver Subclass Progress Code
// definitions.
//
#define EFI_SW_DXE_BS_PC_LEGACY_OPROM_INIT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_DXE_BS_PC_READY_TO_BOOT_EVENT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_DXE_BS_PC_LEGACY_BOOT_EVENT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_SW_DXE_BS_PC_EXIT_BOOT_SERVICES_EVENT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_SW_DXE_BS_PC_VIRTUAL_ADDRESS_CHANGE_EVENT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_SW_DXE_BS_PC_VARIABLE_SERVICES_INIT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_SW_DXE_BS_PC_VARIABLE_RECLAIM \
  (EFI_SUBCLASS_SPECIFIC | 0x00000006)

6.7.4.3. Error Code Definitions¶

Summary

Error code definitions for the Host Software class and all subclasses. See Error Code Operations in Host Software Class for descriptions of these error codes.

The following subclasses define additional subclass-specific error code operations, which are included below:

PEI Foundation
PEIM
DxeBootServiceDriver
EFI Byte Code (EBC) exception
IA-32 exception
Itanium(r) processor family exception
ARM AArch32 and AArch64 exceptions

Prototype

//
// Software Class Error Code definitions.
// These are shared by all subclasses.
//
#define EFI_SW_EC_NON_SPECIFIC              0x00000000
#define EFI_SW_EC_LOAD_ERROR                0x00000001
#define EFI_SW_EC_INVALID_PARAMETER         0x00000002
#define EFI_SW_EC_UNSUPPORTED               0x00000003
#define EFI_SW_EC_INVALID_BUFFER            0x00000004
#define EFI_SW_EC_OUT_OF_RESOURCES          0x00000005
#define EFI_SW_EC_ABORTED                   0x00000006
#define EFI_SW_EC_ILLEGAL_SOFTWARE_STATE    0x00000007
#define EFI_SW_EC_ILLEGAL_HARDWARE_STATE    0x00000008
#define EFI_SW_EC_START_ERROR               0x00000009
#define EFI_SW_EC_BAD_DATE_TIME             0x0000000A
#define EFI_SW_EC_CFG_INVALID               0x0000000B
#define EFI_SW_EC_CFG_CLR_REQUEST           0x0000000C
#define EFI_SW_EC_CFG_DEFAULT               0x0000000D
#define EFI_SW_EC_PWD_INVALID               0x0000000E
#define EFI_SW_EC_PWD_CLR_REQUEST           0x0000000F
#define EFI_SW_EC_PWD_CLEARED               0x00000010
#define EFI_SW_EC_EVENT_LOG_FULL            0x00000011
#define EFI_SW_EC_WRITE_PROTECTED           0x00000012
#define EFI_SW_EC_FV_CORRUPTED              0x00000013
#define EFI_SW_EC_INCONSISTENT_MEMORY_MAP   0x00000014

//
// Software Class Unspecified Subclass Error Code definitions.
//

//
// Software Class SEC Subclass Error Code definitions.
//


//
// Software Class PEI Foundation Subclass Error Code
// definitions.
//
#define EFI_SW_PEI_CORE_EC_DXE_CORRUPT \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_PEI_CORE_EC_DXEIPL_NOT_FOUND \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_PEI_CORE_EC_MEMORY_NOT_INSTALLED \
  (EFI_SUBCLASS_SPECIFIC | 0x00000002)

//
// Software Class PEI Module Subclass Error Code definitions.
//
#define EFI_SW_PEI_EC_NO_RECOVERY_CAPSULE \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_PEI_EC_INVALID_CAPSULE_DESCRIPTOR \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_PEI_EC_S3_RESUME_PPI_NOT_FOUND \
  (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_SW_PEI_EC_S3_BOOT_SCRIPT_ERROR \
  (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_SW_PEI_EC_S3_OS_WAKE_ERROR \
  (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_SW_PEI_EC_S3_RESUME_FAILED \
  (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_SW_PEI_EC_RECOVERY_PPI_NOT_FOUND \
  (EFI_SUBCLASS_SPECIFIC | 0x00000006)
#define EFI_SW_PEI_EC_RECOVERY_FAILED  \
  (EFI_SUBCLASS_SPECIFIC | 0x00000007)
#define EFI_SW_PEI_EC_S3_RESUME_ERROR \
  (EFI_SUBCLASS_SPECIFIC | 0x00000008)
#define EFI_SW_PEI_EC_INVALID_CAPSULE \
  (EFI_SUBCLASS_SPECIFIC | 0x00000009)


//
// Software Class DXE Foundation Subclass Error Code
// definitions.
//
#define EFI_SW_DXE_CORE_EC_NO_ARCH \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)

//
// Software Class DXE Boot Service Driver Subclass Error Code
// definitions.
//
#define EFI_SW_DXE_BS_EC_LEGACY_OPROM_NO_SPACE\
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_DXE_BS_EC_INVALID_PASSWORD \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_DXE_BS_EC_BOOT_OPTION_LOAD_ERROR \
  (EFI_SUBCLASS_SPECIFIC | 0x00000002)
#define EFI_SW_DXE_BS_EC_BOOT_OPTION_FAILED \
  (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_SW_DXE_BS_EC_INVALID_IDE_PASSWORD \
  (EFI_SUBCLASS_SPECIFIC | 0x00000004)

//
// Software Class DXE Runtime Service Driver Subclass Error Code
// definitions.
//


//
// Software Class SMM Driver Subclass Error Code definitions.
//


//
// Software Class EFI Application Subclass Error Code
// definitions.
//


//
// Software Class EFI OS Loader Subclass Error Code definitions.
//


//
// Software Class EFI RT Subclass Error Code definitions.
//


//
// Software Class EBC Exception Subclass Error Code definitions.
// These exceptions are derived from the debug protocol
// definitions in the EFI specification.
//
#define EFI_SW_EC_EBC_UNDEFINED \
  0x00000000
#define EFI_SW_EC_EBC_DIVIDE_ERROR \
  EXCEPT_EBC_DIVIDE_ERROR
#define EFI_SW_EC_EBC_DEBUG \
  EXCEPT_EBC_DEBUG
#define EFI_SW_EC_EBC_DEBUG \
  EXCEPT_EBC_DEBUG
#define EFI_SW_EC_EBC_BREAKPOINT \
  EXCEPT_EBC_BREAKPOINT
#define EFI_SW_EC_EBC_OVERFLOW \
  EXCEPT_EBC_OVERFLOW
#define EFI_SW_EC_EBC_INVALID_OPCODE \
  EXCEPT_EBC_INVALID_OPCODE
#define EFI_SW_EC_EBC_STACK_FAULT \
  EXCEPT_EBC_STACK_FAULT
#define EFI_SW_EC_EBC_ALIGNMENT_CHECK \
  EXCEPT_EBC_ALIGNMENT_CHECK
#define EFI_SW_EC_EBC_INSTRUCTION_ENCODING \
  EXCEPT_EBC_INSTRUCTION_ENCODING
#define EFI_SW_EC_EBC_BAD_BREAK \
  EXCEPT_EBC_BAD_BREAK
#define EFI_SW_EC_EBC_STEP EXCEPT_EBC_STEP


//
// Software Class IA32 Exception Subclass Error Code
// definitions.
// These exceptions are derived from the debug protocol
// definitions in the EFI specification.
//
#define EFI_SW_EC_IA32_DIVIDE_ERROR \
  EXCEPT_IA32_DIVIDE_ERROR
#define EFI_SW_EC_IA32_DEBUG \
  EXCEPT_IA32_DEBUG
#define EFI_SW_EC_IA32_NMI \
  EXCEPT_IA32_NMI
#define EFI_SW_EC_IA32_BREAKPOINT \
  EXCEPT_IA32_BREAKPOINT
#define EFI_SW_EC_IA32_OVERFLOW \
  EXCEPT_IA32_OVERFLOW
#define EFI_SW_EC_IA32_BOUND \
  EXCEPT_IA32_BOUND
#define EFI_SW_EC_IA32_INVALID_OPCODE \
  EXCEPT_IA32_INVALID_OPCODE
#define EFI_SW_EC_IA32_DOUBLE_FAULT \
  EXCEPT_IA32_DOUBLE_FAULT
#define EFI_SW_EC_IA32_INVALID_TSS \
  EXCEPT_IA32_INVALID_TSS
#define EFI_SW_EC_IA32_SEG_NOT_PRESENT \
  EXCEPT_IA32_SEG_NOT_PRESENT
#define EFI_SW_EC_IA32_STACK_FAULT \
  EXCEPT_IA32_STACK_FAULT
#define EFI_SW_EC_IA32_GP_FAULT \
  EXCEPT_IA32_GP_FAULT
#define EFI_SW_EC_IA32_PAGE_FAULT \
  EXCEPT_IA32_PAGE_FAULT
#define EFI_SW_EC_IA32_FP_ERROR \
  EXCEPT_IA32_FP_ERROR
#define EFI_SW_EC_IA32_ALIGNMENT_CHECK \
  EXCEPT_IA32_ALIGNMENT_CHECK
#define EFI_SW_EC_IA32_MACHINE_CHECK \
  EXCEPT_IA32_MACHINE_CHECK
#define EFI_SW_EC_IA32_SIMD EXCEPT_IA32_SIMD


//
// Software Class IPF Exception Subclass Error Code definitions.
// These exceptions are derived from the debug protocol
// definitions in the EFI specification.
//
#define EFI_SW_EC_IPF_ALT_DTLB \
  EXCEPT_IPF_ALT_DTLB
#define EFI_SW_EC_IPF_DNESTED_TLB \
  EXCEPT_IPF_DNESTED_TLB
#define EFI_SW_EC_IPF_BREAKPOINT \
  EXCEPT_IPF_BREAKPOINT
#define EFI_SW_EC_IPF_EXTERNAL_INTERRUPT \
  EXCEPT_IPF_EXTERNAL_INTERRUPT
#define EFI_SW_EC_IPF_GEN_EXCEPT \
  EXCEPT_IPF_GEN_EXCEPT
#define EFI_SW_EC_IPF_NAT_CONSUMPTION \
  EXCEPT_IPF_NAT_CONSUMPTION
#define EFI_SW_EC_IPF_DEBUG_EXCEPT \
  EXCEPT_IPF_DEBUG_EXCEPT
#define EFI_SW_EC_IPF_UNALIGNED_ACCESS \
  EXCEPT_IPF_UNALIGNED_ACCESS
#define EFI_SW_EC_IPF_FP_FAULT \
  EXCEPT_IPF_FP_FAULT
#define EFI_SW_EC_IPF_FP_TRAP \
  EXCEPT_IPF_FP_TRAP
#define EFI_SW_EC_IPF_TAKEN_BRANCH \
  EXCEPT_IPF_TAKEN_BRANCH
#define EFI_SW_EC_IPF_SINGLE_STEP \
  EXCEPT_IPF_SINGLE_STEP


//
// Software Class PEI Service Subclass Error Code definitions.
//
#define EFI_SW_PS_EC_RESET_NOT_AVAILABLE \
  (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_PS_EC_MEMORY_INSTALLED_TWICE \
  (EFI_SUBCLASS_SPECIFIC | 0x00000001)

//
// Software Class EFI Boot Service Subclass Error Code
// definitions.
//


//
// Software Class EFI Runtime Service Subclass Error Code \
// definitions.


//
//
// Software Class EFI DXE Service Subclass Error Code \
// definitions.
//


#define EFI_SW_DXE_BS_PC_BEGIN_CONNECTING_DRIVERS \
  (EFI_SUBCLASS_SPECIFIC | 0x00000005)
#define EFI_SW_DXE_BS_PC_VERIFYING_PASSWORD \
  (EFI_SUBCLASS_SPECIFIC | 0x00000006)

//
// Software Class DXE RT Driver Subclass Progress Code
// definitions.
//
#define EFI_SW_DXE_RT_PC_S0 (EFI_SUBCLASS_SPECIFIC | 0x00000000)
#define EFI_SW_DXE_RT_PC_S1 (EFI_SUBCLASS_SPECIFIC | 0x00000001)
#define EFI_SW_DXE_RT_PC_S2 (EFI_SUBCLASS_SPECIFIC |
0x00000002)
#define EFI_SW_DXE_RT_PC_S3 (EFI_SUBCLASS_SPECIFIC | 0x00000003)
#define EFI_SW_DXE_RT_PC_S4 (EFI_SUBCLASS_SPECIFIC | 0x00000004)
#define EFI_SW_DXE_RT_PC_S5 (EFI_SUBCLASS_SPECIFIC | 0x00000005)


//
// Software Class X64 Exception Subclass Error Code definitions.
// These exceptions are derived from the debug protocol
// definitions in the EFI
// specification.
//
#define EFI_SW_EC_X64_DIVIDE_ERROR    EXCEPT_X64_DIVIDE_ERROR
#define EFI_SW_EC_X64_DEBUG           EXCEPT_X64_DEBUG
#define EFI_SW_EC_X64_NMI             EXCEPT_X64_NMI
#define EFI_SW_EC_X64_BREAKPOINT      EXCEPT_X64_BREAKPOINT
#define EFI_SW_EC_X64_OVERFLOW        EXCEPT_X64_OVERFLOW
#define EFI_SW_EC_X64_BOUND           EXCEPT_X64_BOUND
#define EFI_SW_EC_X64_INVALID_OPCODE \
  EXCEPT_X64_INVALID_OPCODE
#define EFI_SW_EC_X64_DOUBLE_FAULT    EXCEPT_X64_DOUBLE_FAULT
#define EFI_SW_EC_X64_INVALID_TSS     EXCEPT_X64_INVALID_TSS
#define EFI_SW_EC_X64_SEG_NOT_PRESENT \
  EXCEPT_X64_SEG_NOT_PRESENT
#define EFI_SW_EC_X64_STACK_FAULT     EXCEPT_X64_STACK_FAULT
#define EFI_SW_EC_X64_GP_FAULT        EXCEPT_X64_GP_FAULT
#define EFI_SW_EC_X64_PAGE_FAULT      EXCEPT_X64_PAGE_FAULT
#define EFI_SW_EC_X64_FP_ERROR        EXCEPT_X64_FP_ERROR
#define EFI_SW_EC_X64_ALIGNMENT_CHECK \
  EXCEPT_X64_ALIGNMENT_CHECK
#define EFI_SW_EC_X64_MACHINE_CHECK   EXCEPT_X64_MACHINE_CHECK
#define EFI_SW_EC_X64_SIMD EXCEPT_X64_SIMD


//
// Software Class ARM Exception Subclass Error Code definitions.
// These exceptions are derived from the debug protocol
// definitions in the EFI
// specification.
//
#define EFI_SW_EC_ARM_RESET           EXCEPT_ARM_RESET
#define EFI_SW_EC_ARM_UNDEFINED_INSTRUCTION \
  EXCEPT_ARM_UNDEFINED_INSTRUCTION
#define EFI_SW_EC_ARM_SOFTWARE_INTERRUPT \
  EXCEPT_ARM_SOFTWARE_INTERRUPT
#define EFI_SW_EC_ARM_PREFETCH_ABORT \
  EXCEPT_ARM_PREFETCH_ABORT
#define EFI_SW_EC_ARM_DATA_ABORT      EXCEPT_ARM_DATA_ABORT
#define EFI_SW_EC_ARM_RESERVED        EXCEPT_ARM_RESERVED
#define EFI_SW_EC_ARM_IRQ             EXCEPT_ARM_IRQ
#define EFI_SW_EC_ARM_FIQ             EXCEPT_ARM_FIQ
#define EFI_SW_EC_AARCH64_SYNCHRONOUS_EXCEPTIONS \
  EXCEPT_AARCH64_SYNCHRONOUS_EXCEPTIONS
#define EFI_SW_EC_AARCH64_IRQ         EXCEPT_AARCH64_IRQ
#define EFI_SW_EC_AARCH64_FIQ         EXCEPT_AARCH64_FIQ
#define EFI_SW_EC_AARCH64_SERROR      EXCEPT_AARCH64_SERROR

//
// Software Class RISC-V Exception Subclass Error Code
// definitions.
// These exceptions are derived from the debug protocol
// definitions in the EFI specification.
//

#define EFI_SW_EC_RISCV_INST_MISALIGNED
EXCEPT_RISCV_INST_MISALIGNED
#define EFI_SW_EC_RISCV_INST_ACCESS_FAULT
EXCEPT_RISCV_INST_ACCESS_FAULT
#define EFI_SW_EC_RISCV_ILLEGAL_INST
EXCEPT_RISCV_ILLEGAL_INST
#define EFI_SW_EC_RISCV_BREAKPOINT EXCEPT_RISCV_BREAKPOINT
#define EFI_SW_EC_RISCV_LOAD_ADDRESS_MISALIGNED \
EXCEPT_RISCV_LOAD_ADDRESS_MISALIGNED
#define EFI_SW_EC_RISCV_LOAD_ACCESS_FAULT
EXCEPT_RISCV_LOAD_ACCESS_FAULT
#define EFI_SW_EC_RISCV_STORE_AMO_ADDRESS_MISALIGNED \
EXCEPT_RISCV_STORE_AMO_ADDRESS_MISALIGNED
#define EFI_SW_EC_RISCV_STORE_AMO_ACCESS_FAULT \
EXCEPT_RISCV_STORE_AMO_ACCESS_FAULT
#define EFI_SW_EC_RISCV_ENV_CALL_FROM_UMODE
EXCEPT_RISCV_ENV_CALL_FROM_UMODE
#define EFI_SW_EC_RISCV_ENV_CALL_FROM_SMODE
EXCEPT_RISCV_ENV_CALL_FROM_SMODE
#define EFI_SW_EC_RISCV_ENV_CALL_FROM_HMOD
EXCEPT_RISCV_ENV_CALL_FROM_HMODE
#define EFI_SW_EC_RISCV_ENV_CALL_FROM_MMODE
EXCEPT_RISCV_ENV_CALL_FROM_MMODE

6.7.4.4. Extended Data Formats¶

In addition to the other class-specific error definitions in this subsection, the Host Software class uses the following extended error data definition:

EFI_DEVICE_HANDLE_EXTENDED_DATA

See Common Extended Data Formats for its definition.

6.7.4.5. EFI_DEBUG_ASSERT_DATA¶

Summary

This structure provides the assert information that is typically associated with a debug assertion failing.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA         *DataHeader;
  UINT32                       LineNumber;
  UINT32                       FileNameSize;
  EFI_STATUS_CODE_STRING_DATA  *FileName;
} EFI_DEBUG_ASSERT_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_DEBUG_ASSERT_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

LineNumber: The line number of the source file where the fault was generated.

FileNameSize: The size in bytes of FileName .

FileName: A pointer to a NULL -terminated ASCII or Unicode string that represents the file name of the source file where the fault was generated. Type EFI_STATUS_CODE_STRING_DATA is defined in Extended Data Header.

Description

The data indicates the location of the assertion that failed in the source code. This information includes the file name and line number that are necessary to find the failing assertion in source code.

6.7.4.6. EFI_STATUS_CODE_EXCEP_EXTENDED_DATA¶

Summary

This structure defines extended data describing a processor exception error.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA                   DataHeader;
  EFI_STATUS_CODE_EXCEP_SYSTEM_CONTEXT   Context;
} EFI_STATUS_CODE_EXCEP_EXTENDED_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_STATUS_CODE_EXCEP_EXTENDED_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

Context: The system context. Type EFI_STATUS_CODE_EXCEP_SYSTEM_CONTEXT is defined in “Related Definitions” below.

Description

This extended data allows the processor context that is present at the time of the exception to be reported with the exception. The format and contents of the context data varies depending on the processor architecture.

//********************************************************
// EFI_STATUS_CODE_EXCEP_SYSTEM_CONTEXT
//********************************************************
typedef union {
  EFI_SYSTEM_CONTEXT_EBC       SystemContextEbc;
  EFI_SYSTEM_CONTEXT_IA32      SystemContextIa32;
  EFI_SYSTEM_CONTEXT_IPF       SystemContextIpf;
  EFI_SYSTEM_CONTEXT_X64       SystemContextX64;
  EFI_SYSTEM_CONTEXT_ARM       SystemContextArm;
  EFI_SYSTEM_CONTEXT_RISCV32   SystemContextRiscV32;
  EFI_SYSTEM_CONTEXT_RISCV64   SystemContextRiscV64;
  EFI_SYSTEM_CONTEXT_RISCV128  SystemContextRiscv128;
} EFI_STATUS_CODE_EXCEP_SYSTEM_CONTEXT;

SystemContextEbc: The context of the EBC virtual machine when the exception was generated. Type EFI_SYSTEM_CONTEXT_EBC is defined in EFI_DEBUG_SUPPORT_PROTOCOL in the UEFI Specification .

SystemContextIa32: The context of the IA-32 processor when the exception was generated. Type EFI_SYSTEM_CONTEXT_IA32 is defined in the EFI_DEBUG_SUPPORT_PROTOCOL in the UEFI Specification.

SystemContextIpf: The context of the Itanium(r) processor when the exception was generated. Type EFI_SYSTEM_CONTEXT_IPF is defined in the EFI_DEBUG_SUPPORT_PROTOCOL in the UEFI Specification .

SystemContextX64: The context of the X64 processor when the exception was generated. Type EFI_SYSTEM_CONTEXT_X64 is defined in the EFI_DEBUG_SUPPORT_PROTOCOL in the UEFI Specification .

SystemContextArm: The context of the ARM processor when the exception was generated. Type EFI_SYSTEM_CONTEXT_ARM is defined in the EFI_DEBUG_SUPPORT_PROTOCOL in the UEFI Specification .

SystemContextRiscV32: The context of the RISC-V RV32 processor when the exception was generated. Type EFI_SYSTEM_CONTEXT_RISCV32 is defined in the EFI_DEBUG_SUPPORT_PROTOCOL in the UEFI Specification.

SystemContextRiscV64: The context of the RISC-V RV64 processor when the exception was generated. Type EFI_SYSTEM_CONTEXT_RISCV64 is defined in the EFI_DEBUG_SUPPORT_PROTOCOL in the UEFI Specification.

SystemContextRiscV128: The context of the RISC-V RV128 processor when the exception was generated. Type EFI_SYSTEM_CONTEXT_RISCV128 is defined in the EFI_DEBUG_SUPPORT_PROTOCOL in the UEFI Specification.

6.7.4.7. EFI_STATUS_CODE_START_EXTENDED_DATA¶

Summary

This structure defines extended data describing a call to a driver binding protocol start function.

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA           DataHeader;
  EFI_HANDLE                     ControllerHandle;
  EFI_HANDLE                     DriverBindingHandle;
  UINT16                         DevicePathSize;
  // EFI_DEVICE_PATH_PROTOCOL    RemainingDevicePath;
} EFI_STATUS_CODE_START_EXTENDED_DATA;

Parameters

DataHeader: The data header identifying the data. DataHeader.HeaderSize should be sizeof (EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof (EFI_STATUS_CODE_START_EXTENDED_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

ControllerHandle: The controller handle.

DriverBindingHandle: The driver binding handle.

DevicePathSize: The size of the RemainingDevicePath . It is zero if the Start() function is called with RemainingDevicePath = NULL . The UEFI Specification allows that the Start() function of bus drivers can be called in this way.

RemainingDevicePath: Matches the RemainingDevicePath parameter being passed to the Start() function. Note that this parameter is the variable-length device path and not a pointer to the device path.

Description

This extended data records information about a Start() function call. Start() is a member of the UEFI Driver Binding Protocol.

6.7.4.8. EFI_LEGACY_OPROM_EXTENDED_DATA¶

Summary

This structure defines extended data describing a legacy option ROM (OpROM).

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA             DataHeader;
  EFI_HANDLE                       DeviceHandle;
  EFI_PHYSICAL_ADDRESS             RomImageBase;
} EFI_LEGACY_OPROM_EXTENDED_DATA;

Parameters

DataHeader

The data header identifying the data:

DataHeader.HeaderSize should be sizeof(EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof(EFI_LEGACY_OPROM_EXTENDED_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

DeviceHandle: The handle corresponding to the device that this legacy option ROM is being invoked.

RomImageBase: The base address of the shadowed legacy ROM image. May or may not point to the shadow RAM area. Type EFI_PHYSICAL_ADDRESS is defined in AllocatePages() in the UEFI Specification .

Description

The device handle and ROM image base can be used by consumers to determine which option ROM failed. Due to the black-box nature of legacy option ROMs, the amount of information that can be obtained may be limited.

6.7.4.9. EFI_RETURN_STATUS_EXTENDED_DATA¶

Summary

This structure defines extended data describing an EFI_STATUS return value that stands for a failed function call (such as a UEFI boot service).

Prototype

typedef struct {
  EFI_STATUS_CODE_DATA   DataHeader;
  EFI_STATUS             ReturnStatus;
} EFI_RETURN_STATUS_EXTENDED_DATA;

Parameters

DataHeader

The data header identifying the data:

DataHeader.HeaderSize should be sizeof(EFI_STATUS_CODE_DATA) , DataHeader.Size should be sizeof(EFI_RETURN_STATUS_EXTENDED_DATA) - HeaderSize , and DataHeader.Type should be EFI_STATUS_CODE_SPECIFIC_DATA_GUID .

ReturnStatus: The EFI_STATUS return value of the service or function whose failure triggered the reporting of the status code (generally an error code or a debug code).

Description

The extended data records the return value of a service or function call whose failure justifies reporting a status code (generally an error code or debug code).