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audk/MdePkg/Include/Library/UefiLib.h

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/** @file
Provides library functions for common UEFI operations. Only available to DXE
and UEFI module types.
The UEFI Library provides functions and macros that simplify the development of
UEFI Drivers and UEFI Applications. These functions and macros help manage EFI
events, build simple locks utilizing EFI Task Priority Levels (TPLs), install
EFI Driver Model related protocols, manage Unicode string tables for UEFI Drivers,
and print messages on the console output and standard error devices.
Copyright (c) 2006 - 2008, Intel Corporation<BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __UEFI_LIB_H__
#define __UEFI_LIB_H__
#include <Protocol/DriverBinding.h>
#include <Protocol/DriverConfiguration.h>
#include <Protocol/ComponentName.h>
#include <Protocol/ComponentName2.h>
#include <Protocol/DriverDiagnostics.h>
#include <Protocol/DriverDiagnostics2.h>
#include <Protocol/GraphicsOutput.h>
#include <Library/BaseLib.h>
///
/// Unicode String Table
///
typedef struct {
CHAR8 *Language;
CHAR16 *UnicodeString;
} EFI_UNICODE_STRING_TABLE;
///
/// EFI Lock Status
///
typedef enum {
EfiLockUninitialized = 0,
EfiLockReleased = 1,
EfiLockAcquired = 2
} EFI_LOCK_STATE;
///
/// EFI Lock
///
typedef struct {
EFI_TPL Tpl;
EFI_TPL OwnerTpl;
EFI_LOCK_STATE Lock;
} EFI_LOCK;
/**
Macro that returns the number of 100 ns units for a specified number of microseconds.
Useful for managing EFI timer events.
@param Microseconds Number of microseconds.
@return The number of 100 ns units equivalent to the number of microseconds specified
by Microseconds.
**/
#define EFI_TIMER_PERIOD_MICROSECONDS(Microseconds) MultU64x32((UINT64)(Microseconds), 10)
/**
Macro that returns the number of 100 ns units for a specified number of milliseconds.
Useful for managing EFI timer events.
@param Milliseconds Number of milliseconds.
@return The number of 100 ns units equivalent to the number of milliseconds specified
by Milliseconds.
**/
#define EFI_TIMER_PERIOD_MILLISECONDS(Milliseconds) MultU64x32((UINT64)(Milliseconds), 10000)
/**
Macro that returns the number of 100 ns units for a specified number of seconds.
Useful for managing EFI timer events.
@param Seconds Number of seconds.
@return The number of 100 ns units equivalent to the number of seconds specified
by Seconds.
**/
#define EFI_TIMER_PERIOD_SECONDS(Seconds) MultU64x32((UINT64)(Seconds), 10000000)
/**
Macro that returns the a pointer to the next EFI_MEMORY_DESCRIPTOR in an array
returned from GetMemoryMap().
@param MemoryDescriptor A pointer to an EFI_MEMORY_DESCRIPTOR.
@param Size The size, in bytes, of the current EFI_MEMORY_DESCRIPTOR.
@return A pointer to the next EFI_MEMORY_DESCRIPTOR.
**/
#define NEXT_MEMORY_DESCRIPTOR(MemoryDescriptor, Size) \
((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) + (Size)))
/**
Retrieves a pointer to the system configuration table from the EFI System Table
based on a specified GUID.
This function searches the list of configuration tables stored in the EFI System Table
for a table with a GUID that matches TableGuid. If a match is found, then a pointer to
the configuration table is returned in Table, and EFI_SUCCESS is returned. If a matching GUID
is not found, then EFI_NOT_FOUND is returned.
If TableGuid is NULL, then ASSERT().
If Table is NULL, then ASSERT().
@param TableGuid Pointer to table's GUID type..
@param Table Pointer to the table associated with TableGuid in the EFI System Table.
@retval EFI_SUCCESS A configuration table matching TableGuid was found.
@retval EFI_NOT_FOUND A configuration table matching TableGuid could not be found.
**/
EFI_STATUS
EFIAPI
EfiGetSystemConfigurationTable (
IN EFI_GUID *TableGuid,
OUT VOID **Table
);
/**
Creates and returns a notification event and registers that event with all the protocol
instances specified by ProtocolGuid.
This function causes the notification function to be executed for every protocol of type
ProtocolGuid instance that exists in the system when this function is invoked. If there are
no instances of ProtocolGuid in the handle database at the time this function is invoked,
then the notification function is still executed one time. In addition, every time a protocol
of type ProtocolGuid instance is installed or reinstalled, the notification function is also
executed. This function returns the notification event that was created.
If ProtocolGuid is NULL, then ASSERT().
If NotifyTpl is not a legal TPL value, then ASSERT().
If NotifyFunction is NULL, then ASSERT().
If Registration is NULL, then ASSERT().
@param ProtocolGuid Supplies GUID of the protocol upon whose installation the event is fired.
@param NotifyTpl Supplies the task priority level of the event notifications.
@param NotifyFunction Supplies the function to notify when the event is signaled.
@param NotifyContext The context parameter to pass to NotifyFunction.
@param Registration A pointer to a memory location to receive the registration value.
This value is passed to LocateHandle() to obtain new handles that
have been added that support the ProtocolGuid-specified protocol.
@return The notification event that was created.
**/
EFI_EVENT
EFIAPI
EfiCreateProtocolNotifyEvent(
IN EFI_GUID *ProtocolGuid,
IN EFI_TPL NotifyTpl,
IN EFI_EVENT_NOTIFY NotifyFunction,
IN VOID *NotifyContext, OPTIONAL
OUT VOID **Registration
);
/**
Creates a named event that can be signaled with EfiNamedEventSignal().
This function creates an event using NotifyTpl, NoifyFunction, and NotifyContext.
This event is signaled with EfiNamedEventSignal(). This provides the ability for one or more
listeners on the same event named by the GUID specified by Name.
If Name is NULL, then ASSERT().
If NotifyTpl is not a legal TPL value, then ASSERT().
If NotifyFunction is NULL, then ASSERT().
@param Name Supplies GUID name of the event.
@param NotifyTpl Supplies the task priority level of the event notifications.
@param NotifyFunction Supplies the function to notify when the event is signaled.
@param NotifyContext The context parameter to pass to NotifyFunction.
@param Registration A pointer to a memory location to receive the registration value.
@retval EFI_SUCCESS A named event was created.
@retval EFI_OUT_OF_RESOURCES There are not enough resource to create the named event.
**/
EFI_STATUS
EFIAPI
EfiNamedEventListen (
IN CONST EFI_GUID *Name,
IN EFI_TPL NotifyTpl,
IN EFI_EVENT_NOTIFY NotifyFunction,
IN CONST VOID *NotifyContext, OPTIONAL
OUT VOID *Registration OPTIONAL
);
/**
Signals a named event created with EfiNamedEventListen().
This function signals the named event specified by Name. The named event must have been
created with EfiNamedEventListen().
If Name is NULL, then ASSERT().
@param Name Supplies GUID name of the event.
@retval EFI_SUCCESS A named event was signaled.
@retval EFI_OUT_OF_RESOURCES There are not enough resource to signal the named event.
**/
EFI_STATUS
EFIAPI
EfiNamedEventSignal (
IN CONST EFI_GUID *Name
);
/**
Returns the current TPL.
This function returns the current TPL. There is no EFI service to directly
retrieve the current TPL. Instead, the RaiseTPL() function is used to raise
the TPL to TPL_HIGH_LEVEL. This will return the current TPL. The TPL level
can then immediately be restored back to the current TPL level with a call
to RestoreTPL().
@return The current TPL.
**/
EFI_TPL
EFIAPI
EfiGetCurrentTpl (
VOID
);
/**
Initializes a basic mutual exclusion lock.
This function initializes a basic mutual exclusion lock to the released state
and returns the lock. Each lock provides mutual exclusion access at its task
priority level. Since there is no preemption or multiprocessor support in EFI,
acquiring the lock only consists of raising to the locks TPL.
If Lock is NULL, then ASSERT().
If Priority is not a valid TPL value, then ASSERT().
@param Lock A pointer to the lock data structure to initialize.
@param Priority EFI TPL associated with the lock.
@return The lock.
**/
EFI_LOCK *
EFIAPI
EfiInitializeLock (
IN OUT EFI_LOCK *Lock,
IN EFI_TPL Priority
);
/**
Initializes a basic mutual exclusion lock.
This macro initializes the contents of a basic mutual exclusion lock to the
released state. Each lock provides mutual exclusion access at its task
priority level. Since there is no preemption or multiprocessor support in EFI,
acquiring the lock only consists of raising to the locks TPL.
@param Priority The task priority level of the lock.
@return The lock.
**/
#define EFI_INITIALIZE_LOCK_VARIABLE(Priority) \
{Priority, TPL_APPLICATION, EfiLockReleased }
/**
Macro that calls DebugAssert() if an EFI_LOCK structure is not in the locked state.
If the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set,
then this macro evaluates the EFI_LOCK structure specified by Lock. If Lock
is not in the locked state, then DebugAssert() is called passing in the source
filename, source line number, and Lock.
If Lock is NULL, then ASSERT().
@param LockParameter A pointer to the lock to acquire.
**/
#define ASSERT_LOCKED(LockParameter) \
do { \
if (DebugAssertEnabled ()) { \
ASSERT (LockParameter != NULL); \
if ((LockParameter)->Lock != EfiLockAcquired) { \
_ASSERT (LockParameter not locked); \
} \
} \
} while (FALSE)
/**
Acquires ownership of a lock.
This function raises the system's current task priority level to the task
priority level of the mutual exclusion lock. Then, it places the lock in the
acquired state.
If Lock is NULL, then ASSERT().
If Lock is not initialized, then ASSERT().
If Lock is already in the acquired state, then ASSERT().
@param Lock A pointer to the lock to acquire.
**/
VOID
EFIAPI
EfiAcquireLock (
IN EFI_LOCK *Lock
);
/**
Acquires ownership of a lock.
This function raises the system's current task priority level to the task priority
level of the mutual exclusion lock. Then, it attempts to place the lock in the acquired state.
If the lock is already in the acquired state, then EFI_ACCESS_DENIED is returned.
Otherwise, EFI_SUCCESS is returned.
If Lock is NULL, then ASSERT().
If Lock is not initialized, then ASSERT().
@param Lock A pointer to the lock to acquire.
@retval EFI_SUCCESS The lock was acquired.
@retval EFI_ACCESS_DENIED The lock could not be acquired because it is already owned.
**/
EFI_STATUS
EFIAPI
EfiAcquireLockOrFail (
IN EFI_LOCK *Lock
);
/**
Releases ownership of a lock.
This function transitions a mutual exclusion lock from the acquired state to
the released state, and restores the system's task priority level to its
previous level.
If Lock is NULL, then ASSERT().
If Lock is not initialized, then ASSERT().
If Lock is already in the released state, then ASSERT().
@param Lock A pointer to the lock to release.
**/
VOID
EFIAPI
EfiReleaseLock (
IN EFI_LOCK *Lock
);
/**
Tests whether a controller handle is being managed by a specific driver.
This function tests whether the driver specified by DriverBindingHandle is
currently managing the controller specified by ControllerHandle. This test
is performed by evaluating if the the protocol specified by ProtocolGuid is
present on ControllerHandle and is was opened by DriverBindingHandle with an
attribute of EFI_OPEN_PROTOCOL_BY_DRIVER.
If ProtocolGuid is NULL, then ASSERT().
@param ControllerHandle A handle for a controller to test.
@param DriverBindingHandle Specifies the driver binding handle for the
driver.
@param ProtocolGuid Specifies the protocol that the driver specified
by DriverBindingHandle opens in its Start()
function.
@retval EFI_SUCCESS ControllerHandle is managed by the driver
specified by DriverBindingHandle.
@retval EFI_UNSUPPORTED ControllerHandle is not managed by the driver
specified by DriverBindingHandle.
**/
EFI_STATUS
EFIAPI
EfiTestManagedDevice (
IN CONST EFI_HANDLE ControllerHandle,
IN CONST EFI_HANDLE DriverBindingHandle,
IN CONST EFI_GUID *ProtocolGuid
);
/**
Tests whether a child handle is a child device of the controller.
This function tests whether ChildHandle is one of the children of
ControllerHandle. This test is performed by checking to see if the protocol
specified by ProtocolGuid is present on ControllerHandle and opened by
ChildHandle with an attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
If ProtocolGuid is NULL, then ASSERT().
@param ControllerHandle A handle for a (parent) controller to test.
@param ChildHandle A child handle to test.
@param ProtocolGuid Supplies the protocol that the child controller
opens on its parent controller.
@retval EFI_SUCCESS ChildHandle is a child of the ControllerHandle.
@retval EFI_UNSUPPORTED ChildHandle is not a child of the
ControllerHandle.
**/
EFI_STATUS
EFIAPI
EfiTestChildHandle (
IN CONST EFI_HANDLE ControllerHandle,
IN CONST EFI_HANDLE ChildHandle,
IN CONST EFI_GUID *ProtocolGuid
);
/**
This function looks up a Unicode string in UnicodeStringTable.
If Language is a member of SupportedLanguages and a Unicode string is found in
UnicodeStringTable that matches the language code specified by Language, then it
is returned in UnicodeString.
@param Language A pointer to the ISO 639-2 language code for the
Unicode string to look up and return.
@param SupportedLanguages A pointer to the set of ISO 639-2 language codes
that the Unicode string table supports. Language
must be a member of this set.
@param UnicodeStringTable A pointer to the table of Unicode strings.
@param UnicodeString A pointer to the Unicode string from UnicodeStringTable
that matches the language specified by Language.
@retval EFI_SUCCESS The Unicode string that matches the language
specified by Language was found
in the table of Unicode strings UnicodeStringTable,
and it was returned in UnicodeString.
@retval EFI_INVALID_PARAMETER Language is NULL.
@retval EFI_INVALID_PARAMETER UnicodeString is NULL.
@retval EFI_UNSUPPORTED SupportedLanguages is NULL.
@retval EFI_UNSUPPORTED UnicodeStringTable is NULL.
@retval EFI_UNSUPPORTED The language specified by Language is not a
member of SupportedLanguages.
@retval EFI_UNSUPPORTED The language specified by Language is not
supported by UnicodeStringTable.
**/
EFI_STATUS
EFIAPI
LookupUnicodeString (
IN CONST CHAR8 *Language,
IN CONST CHAR8 *SupportedLanguages,
IN CONST EFI_UNICODE_STRING_TABLE *UnicodeStringTable,
OUT CHAR16 **UnicodeString
);
/**
This function looks up a Unicode string in UnicodeStringTable.
If Language is a member of SupportedLanguages and a Unicode string is found in
UnicodeStringTable that matches the language code specified by Language, then
it is returned in UnicodeString.
@param Language A pointer to an ASCII string containing the ISO 639-2 or the
RFC 4646 language code for the Unicode string to look up and
return. If Iso639Language is TRUE, then this ASCII string is
not assumed to be Null-terminated, and only the first three
characters are used. If Iso639Language is FALSE, then this ASCII
string must be Null-terminated.
@param SupportedLanguages A pointer to a Null-terminated ASCII string that contains a
set of ISO 639-2 or RFC 4646 language codes that the Unicode
string table supports. Language must be a member of this set.
If Iso639Language is TRUE, then this string contains one or more
ISO 639-2 language codes with no separator characters. If Iso639Language
is FALSE, then is string contains one or more RFC 4646 language
codes separated by ';'.
@param UnicodeStringTable A pointer to the table of Unicode strings. Type EFI_UNICODE_STRING_TABLE
is defined in "Related Definitions".
@param UnicodeString A pointer to the Null-terminated Unicode string from UnicodeStringTable
that matches the language specified by Language.
@param Iso639Language Specifies the supported language code format. If it is TRUE, then
Language and SupportedLanguages follow ISO 639-2 language code format.
Otherwise, they follow RFC 4646 language code format.
@retval EFI_SUCCESS The Unicode string that matches the language specified by Language
was found in the table of Unicode strings UnicodeStringTable, and
it was returned in UnicodeString.
@retval EFI_INVALID_PARAMETER Language is NULL.
@retval EFI_INVALID_PARAMETER UnicodeString is NULL.
@retval EFI_UNSUPPORTED SupportedLanguages is NULL.
@retval EFI_UNSUPPORTED UnicodeStringTable is NULL.
@retval EFI_UNSUPPORTED The language specified by Language is not a member of SupportedLanguages.
@retval EFI_UNSUPPORTED The language specified by Language is not supported by UnicodeStringTable.
**/
EFI_STATUS
EFIAPI
LookupUnicodeString2 (
IN CONST CHAR8 *Language,
IN CONST CHAR8 *SupportedLanguages,
IN CONST EFI_UNICODE_STRING_TABLE *UnicodeStringTable,
OUT CHAR16 **UnicodeString,
IN BOOLEAN Iso639Language
);
/**
This function adds a Unicode string to UnicodeStringTable.
If Language is a member of SupportedLanguages then UnicodeString is added to
UnicodeStringTable. New buffers are allocated for both Language and
UnicodeString. The contents of Language and UnicodeString are copied into
these new buffers. These buffers are automatically freed when
FreeUnicodeStringTable() is called.
@param Language A pointer to the ISO 639-2 language code for the Unicode
string to add.
@param SupportedLanguages A pointer to the set of ISO 639-2 language codes
that the Unicode string table supports.
Language must be a member of this set.
@param UnicodeStringTable A pointer to the table of Unicode strings.
@param UnicodeString A pointer to the Unicode string to add.
@retval EFI_SUCCESS The Unicode string that matches the language
specified by Language was found in the table of
Unicode strings UnicodeStringTable, and it was
returned in UnicodeString.
@retval EFI_INVALID_PARAMETER Language is NULL.
@retval EFI_INVALID_PARAMETER UnicodeString is NULL.
@retval EFI_INVALID_PARAMETER UnicodeString is an empty string.
@retval EFI_UNSUPPORTED SupportedLanguages is NULL.
@retval EFI_ALREADY_STARTED A Unicode string with language Language is
already present in UnicodeStringTable.
@retval EFI_OUT_OF_RESOURCES There is not enough memory to add another
Unicode string to UnicodeStringTable.
@retval EFI_UNSUPPORTED The language specified by Language is not a
member of SupportedLanguages.
**/
EFI_STATUS
EFIAPI
AddUnicodeString (
IN CONST CHAR8 *Language,
IN CONST CHAR8 *SupportedLanguages,
IN EFI_UNICODE_STRING_TABLE **UnicodeStringTable,
IN CONST CHAR16 *UnicodeString
);
/**
This function adds the Null-terminated Unicode string specified by UnicodeString
to UnicodeStringTable.
If Language is a member of SupportedLanguages then UnicodeString is added to
UnicodeStringTable. New buffers are allocated for both Language and UnicodeString.
The contents of Language and UnicodeString are copied into these new buffers.
These buffers are automatically freed when EfiLibFreeUnicodeStringTable() is called.
@param Language A pointer to an ASCII string containing the ISO 639-2 or
the RFC 4646 language code for the Unicode string to add.
If Iso639Language is TRUE, then this ASCII string is not
assumed to be Null-terminated, and only the first three
chacters are used. If Iso639Language is FALSE, then this
ASCII string must be Null-terminated.
@param SupportedLanguages A pointer to a Null-terminated ASCII string that contains
a set of ISO 639-2 or RFC 4646 language codes that the Unicode
string table supports. Language must be a member of this set.
If Iso639Language is TRUE, then this string contains one or more
ISO 639-2 language codes with no separator characters.
If Iso639Language is FALSE, then is string contains one or more
RFC 4646 language codes separated by ';'.
@param UnicodeStringTable A pointer to the table of Unicode strings. Type EFI_UNICODE_STRING_TABLE
is defined in "Related Definitions".
@param UnicodeString A pointer to the Unicode string to add.
@param Iso639Language Specifies the supported language code format. If it is TRUE,
then Language and SupportedLanguages follow ISO 639-2 language code format.
Otherwise, they follow RFC 4646 language code format.
@retval EFI_SUCCESS The Unicode string that matches the language specified by
Language was found in the table of Unicode strings UnicodeStringTable,
and it was returned in UnicodeString.
@retval EFI_INVALID_PARAMETER Language is NULL.
@retval EFI_INVALID_PARAMETER UnicodeString is NULL.
@retval EFI_INVALID_PARAMETER UnicodeString is an empty string.
@retval EFI_UNSUPPORTED SupportedLanguages is NULL.
@retval EFI_ALREADY_STARTED A Unicode string with language Language is already present in
UnicodeStringTable.
@retval EFI_OUT_OF_RESOURCES There is not enough memory to add another Unicode string UnicodeStringTable.
@retval EFI_UNSUPPORTED The language specified by Language is not a member of SupportedLanguages.
**/
EFI_STATUS
EFIAPI
AddUnicodeString2 (
IN CONST CHAR8 *Language,
IN CONST CHAR8 *SupportedLanguages,
IN EFI_UNICODE_STRING_TABLE **UnicodeStringTable,
IN CONST CHAR16 *UnicodeString,
IN BOOLEAN Iso639Language
);
/**
This function frees the table of Unicode strings in UnicodeStringTable.
If UnicodeStringTable is NULL, then EFI_SUCCESS is returned.
Otherwise, each language code, and each Unicode string in the Unicode string
table are freed, and EFI_SUCCESS is returned.
@param UnicodeStringTable A pointer to the table of Unicode strings.
@retval EFI_SUCCESS The Unicode string table was freed.
**/
EFI_STATUS
EFIAPI
FreeUnicodeStringTable (
IN EFI_UNICODE_STRING_TABLE *UnicodeStringTable
);
/**
Returns a pointer to an allocated buffer that contains the contents of a
variable retrieved through the UEFI Runtime Service GetVariable(). The
returned buffer is allocated using AllocatePool(). The caller is responsible
for freeing this buffer with FreePool().
If Name is NULL, then ASSERT().
If Guid is NULL, then ASSERT().
@param[in] Name Pointer to a Null-terminated Unicode string.
@param[in] Guid Pointer to an EFI_GUID structure
@retval NULL The variable could not be retrieved.
@retval NULL There are not enough resources available for the variable contents.
@retval Other A pointer to allocated buffer containing the variable contents.
**/
VOID *
EFIAPI
GetVariable (
IN CONST CHAR16 *Name,
IN CONST EFI_GUID *Guid
);
/**
Returns a pointer to an allocated buffer that contains the contents of a
variable retrieved through the UEFI Runtime Service GetVariable(). This
function always uses the EFI_GLOBAL_VARIABLE GUID to retrieve variables.
The returned buffer is allocated using AllocatePool(). The caller is
responsible for freeing this buffer with FreePool().
If Name is NULL, then ASSERT().
@param[in] Name Pointer to a Null-terminated Unicode string.
@retval NULL The variable could not be retrieved.
@retval NULL There are not enough resources available for the variable contents.
@retval Other A pointer to allocated buffer containing the variable contents.
**/
VOID *
EFIAPI
GetEfiGlobalVariable (
IN CONST CHAR16 *Name
);
/**
Returns a pointer to an allocated buffer that contains the best matching language
from a set of supported languages.
This function supports both ISO 639-2 and RFC 4646 language codes, but language
code types may not be mixed in a single call to this function. The language
code returned is allocated using AllocatePool(). The caller is responsible for
freeing the allocated buffer using FreePool(). This function supports a variable
argument list that allows the caller to pass in a prioritized list of language
codes to test against all the language codes in SupportedLanguages.
If SupportedLanguages is NULL, then ASSERT().
@param[in] SupportedLanguages A pointer to a Null-terminated ASCII string that
contains a set of language codes in the format
specified by Iso639Language.
@param[in] Iso639Language If TRUE, then all language codes are assumed to be
in ISO 639-2 format. If FALSE, then all language
codes are assumed to be in RFC 4646 language format
@param[in] ... A variable argument list that contains pointers to
Null-terminated ASCII strings that contain one or more
language codes in the format specified by Iso639Language.
The first language code from each of these language
code lists is used to determine if it is an exact or
close match to any of the language codes in
SupportedLanguages. Close matches only apply to RFC 4646
language codes, and the matching algorithm from RFC 4647
is used to determine if a close match is present. If
an exact or close match is found, then the matching
language code from SupportedLanguages is returned. If
no matches are found, then the next variable argument
parameter is evaluated. The variable argument list
is terminated by a NULL.
@retval NULL The best matching language could not be found in SupportedLanguages.
@retval NULL There are not enough resources available to return the best matching
language.
@retval Other A pointer to a Null-terminated ASCII string that is the best matching
language in SupportedLanguages.
**/
CHAR8 *
EFIAPI
GetBestLanguage (
IN CONST CHAR8 *SupportedLanguages,
IN BOOLEAN Iso639Language,
...
);
/**
Draws a dialog box to the console output device specified by
ConOut defined in the EFI_SYSTEM_TABLE and waits for a keystroke
from the console input device specified by ConIn defined in the
EFI_SYSTEM_TABLE.
If there are no strings in the variable argument list, then ASSERT().
If all the strings in the variable argument list are empty, then ASSERT().
@param[in] Attribute Specifies the foreground and background color of the popup.
@param[out] Key A pointer to the EFI_KEY value of the key that was
pressed. This is an optional parameter that may be NULL.
If it is NULL then no wait for a keypress will be performed.
@param[in] ... The variable argument list that contains pointers to Null-
terminated Unicode strings to display in the dialog box.
The variable argument list is terminated by a NULL.
**/
VOID
EFIAPI
CreatePopUp (
IN UINTN Attribute,
OUT EFI_INPUT_KEY *Key, OPTIONAL
...
);
/**
Retrieves the width of a Unicode character.
This function computes and returns the width of the Unicode character specified
by UnicodeChar.
@param UnicodeChar A Unicode character.
@retval 0 The width if UnicodeChar could not be determined.
@retval 1 UnicodeChar is a narrow glyph.
@retval 2 UnicodeChar is a wide glyph.
**/
UINTN
EFIAPI
GetGlyphWidth (
IN CHAR16 UnicodeChar
);
/**
Computes the display length of a Null-terminated Unicode String.
This function computes and returns the display length of the Null-terminated Unicode
string specified by String. If String is NULL then 0 is returned. If any of the widths
of the Unicode characters in String can not be determined, then 0 is returned. The display
width of String can be computed by summing the display widths of each Unicode character
in String. Unicode characters that are narrow glyphs have a width of 1, and Unicode
characters that are width glyphs have a width of 2.
If String is not aligned on a 16-bit boundary, then ASSERT().
@param String A pointer to a Null-terminated Unicode string.
@return The display length of the Null-terminated Unicode string specified by String.
**/
UINTN
EFIAPI
UnicodeStringDisplayLength (
IN CONST CHAR16 *String
);
//
// Functions that abstract early Framework contamination of UEFI.
//
/**
Create, Signal, and Close the Ready to Boot event using EfiSignalEventReadyToBoot().
This function abstracts the signaling of the Ready to Boot Event. The Framework moved
from a proprietary to UEFI 2.0 based mechanism. This library abstracts the caller
from how this event is created to prevent to code form having to change with the
version of the specification supported.
**/
VOID
EFIAPI
EfiSignalEventReadyToBoot (
VOID
);
/**
Create, Signal, and Close the Ready to Boot event using EfiSignalEventLegacyBoot().
This function abstracts the signaling of the Legacy Boot Event. The Framework moved from
a proprietary to UEFI 2.0 based mechanism. This library abstracts the caller from how
this event is created to prevent to code form having to change with the version of the
specification supported.
**/
VOID
EFIAPI
EfiSignalEventLegacyBoot (
VOID
);
/**
Creates an EFI event in the Legacy Boot Event Group.
Prior to UEFI 2.0 this was done via a non blessed UEFI extensions and this library
abstracts the implementation mechanism of this event from the caller. This function
abstracts the creation of the Legacy Boot Event. The Framework moved from a proprietary
to UEFI 2.0 based mechanism. This library abstracts the caller from how this event
is created to prevent to code form having to change with the version of the
specification supported.
If LegacyBootEvent is NULL, then ASSERT().
@param LegacyBootEvent Returns the EFI event returned from gBS->CreateEvent(Ex).
@retval EFI_SUCCESS Event was created.
@retval Other Event was not created.
**/
EFI_STATUS
EFIAPI
EfiCreateEventLegacyBoot (
OUT EFI_EVENT *LegacyBootEvent
);
/**
Create an EFI event in the Legacy Boot Event Group and allows
the caller to specify a notification function.
This function abstracts the creation of the Legacy Boot Event.
The Framework moved from a proprietary to UEFI 2.0 based mechanism.
This library abstracts the caller from how this event is created to prevent
to code form having to change with the version of the specification supported.
If LegacyBootEvent is NULL, then ASSERT().
@param NotifyTpl The task priority level of the event.
@param NotifyFunction The notification function to call when the event is signaled.
@param NotifyContext The content to pass to NotifyFunction when the event is signaled.
@param LegacyBootEvent Returns the EFI event returned from gBS->CreateEvent(Ex).
@retval EFI_SUCCESS Event was created.
@retval Other Event was not created.
**/
EFI_STATUS
EFIAPI
EfiCreateEventLegacyBootEx (
IN EFI_TPL NotifyTpl,
IN EFI_EVENT_NOTIFY NotifyFunction, OPTIONAL
IN VOID *NotifyContext, OPTIONAL
OUT EFI_EVENT *LegacyBootEvent
);
/**
Create an EFI event in the Ready To Boot Event Group.
Prior to UEFI 2.0 this was done via a non-standard UEFI extension, and this library
abstracts the implementation mechanism of this event from the caller.
This function abstracts the creation of the Ready to Boot Event. The Framework
moved from a proprietary to UEFI 2.0-based mechanism. This library abstracts
the caller from how this event is created to prevent the code form having to
change with the version of the specification supported.
If ReadyToBootEvent is NULL, then ASSERT().
@param ReadyToBootEvent Returns the EFI event returned from gBS->CreateEvent(Ex).
@retval EFI_SUCCESS Event was created.
@retval Other Event was not created.
**/
EFI_STATUS
EFIAPI
EfiCreateEventReadyToBoot (
OUT EFI_EVENT *ReadyToBootEvent
);
/**
Create an EFI event in the Ready To Boot Event Group and allows
the caller to specify a notification function.
This function abstracts the creation of the Ready to Boot Event.
The Framework moved from a proprietary to UEFI 2.0 based mechanism.
This library abstracts the caller from how this event is created to prevent
to code form having to change with the version of the specification supported.
If ReadyToBootEvent is NULL, then ASSERT().
@param NotifyTpl The task priority level of the event.
@param NotifyFunction The notification function to call when the event is signaled.
@param NotifyContext The content to pass to NotifyFunction when the event is signaled.
@param ReadyToBootEvent Returns the EFI event returned from gBS->CreateEvent(Ex).
@retval EFI_SUCCESS Event was created.
@retval Other Event was not created.
**/
EFI_STATUS
EFIAPI
EfiCreateEventReadyToBootEx (
IN EFI_TPL NotifyTpl,
IN EFI_EVENT_NOTIFY NotifyFunction, OPTIONAL
IN VOID *NotifyContext, OPTIONAL
OUT EFI_EVENT *ReadyToBootEvent
);
/**
Initialize a Firmware Volume (FV) Media Device Path node.
The Framework FwVol Device Path changed to conform to the UEFI 2.0 specification.
This library function abstracts initializing a device path node.
Initialize the MEDIA_FW_VOL_FILEPATH_DEVICE_PATH data structure. This device
path changed in the DXE CIS version 0.92 in a non back ward compatible way to
not conflict with the UEFI 2.0 specification. This function abstracts the
differences from the caller.
If FvDevicePathNode is NULL, then ASSERT().
If NameGuid is NULL, then ASSERT().
@param FvDevicePathNode Pointer to a FV device path node to initialize
@param NameGuid FV file name to use in FvDevicePathNode
**/
VOID
EFIAPI
EfiInitializeFwVolDevicepathNode (
IN OUT MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvDevicePathNode,
IN CONST EFI_GUID *NameGuid
);
/**
Check to see if the Firmware Volume (FV) Media Device Path is valid
The Framework FwVol Device Path changed to conform to the UEFI 2.0 specification.
This library function abstracts validating a device path node.
Check the MEDIA_FW_VOL_FILEPATH_DEVICE_PATH data structure to see if it's valid.
If it is valid, then return the GUID file name from the device path node. Otherwise,
return NULL. This device path changed in the DXE CIS version 0.92 in a non backward
compatible way to not conflict with the UEFI 2.0 specification. This function abstracts
the differences from the caller.
If FvDevicePathNode is NULL, then ASSERT().
@param FvDevicePathNode Pointer to FV device path to check.
@retval NULL FvDevicePathNode is not valid.
@retval Other FvDevicePathNode is valid and pointer to NameGuid was returned.
**/
EFI_GUID *
EFIAPI
EfiGetNameGuidFromFwVolDevicePathNode (
IN CONST MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvDevicePathNode
);
/**
Prints a formatted Unicode string to the console output device specified by
ConOut defined in the EFI_SYSTEM_TABLE.
This function prints a formatted Unicode string to the console output device
specified by ConOut in EFI_SYSTEM_TABLE and returns the number of Unicode
characters that printed to ConOut. If the length of the formatted Unicode
string is greater than PcdUefiLibMaxPrintBufferSize, then only the first
PcdUefiLibMaxPrintBufferSize characters are sent to ConOut.
If Format is NULL, then ASSERT().
If Format is not aligned on a 16-bit boundary, then ASSERT().
@param Format Null-terminated Unicode format string.
@param ... Variable argument list whose contents are accessed based
on the format string specified by Format.
@return Number of Unicode characters printed to ConOut.
**/
UINTN
EFIAPI
Print (
IN CONST CHAR16 *Format,
...
);
/**
Prints a formatted Unicode string to the console output device specified by
StdErr defined in the EFI_SYSTEM_TABLE.
This function prints a formatted Unicode string to the console output device
specified by StdErr in EFI_SYSTEM_TABLE and returns the number of Unicode
characters that printed to StdErr. If the length of the formatted Unicode
string is greater than PcdUefiLibMaxPrintBufferSize, then only the first
PcdUefiLibMaxPrintBufferSize characters are sent to StdErr.
If Format is NULL, then ASSERT().
If Format is not aligned on a 16-bit boundary, then ASSERT().
@param Format Null-terminated Unicode format string.
@param ... Variable argument list whose contents are accessed based
on the format string specified by Format.
@return Number of Unicode characters printed to StdErr.
**/
UINTN
EFIAPI
ErrorPrint (
IN CONST CHAR16 *Format,
...
);
/**
Prints a formatted ASCII string to the console output device specified by
ConOut defined in the EFI_SYSTEM_TABLE.
This function prints a formatted ASCII string to the console output device
specified by ConOut in EFI_SYSTEM_TABLE and returns the number of ASCII
characters that printed to ConOut. If the length of the formatted ASCII
string is greater than PcdUefiLibMaxPrintBufferSize, then only the first
PcdUefiLibMaxPrintBufferSize characters are sent to ConOut.
If Format is NULL, then ASSERT().
@param Format Null-terminated ASCII format string.
@param ... Variable argument list whose contents are accessed based
on the format string specified by Format.
@return Number of ASCII characters printed to ConOut.
**/
UINTN
EFIAPI
AsciiPrint (
IN CONST CHAR8 *Format,
...
);
/**
Prints a formatted ASCII string to the console output device specified by
StdErr defined in the EFI_SYSTEM_TABLE.
This function prints a formatted ASCII string to the console output device
specified by StdErr in EFI_SYSTEM_TABLE and returns the number of ASCII
characters that printed to StdErr. If the length of the formatted ASCII
string is greater than PcdUefiLibMaxPrintBufferSize, then only the first
PcdUefiLibMaxPrintBufferSize characters are sent to StdErr.
If Format is NULL, then ASSERT().
@param Format Null-terminated ASCII format string.
@param ... Variable argument list whose contents are accessed based
on the format string specified by Format.
@return Number of ASCII characters printed to ConErr.
**/
UINTN
EFIAPI
AsciiErrorPrint (
IN CONST CHAR8 *Format,
...
);
/**
Prints a formatted Unicode string to a graphics console device specified by
ConsoleOutputHandle defined in the EFI_SYSTEM_TABLE at the given (X,Y) coordinates.
This function prints a formatted Unicode string to the graphics console device
specified by ConsoleOutputHandle in EFI_SYSTEM_TABLE and returns the number of
Unicode characters displayed, not including partial characters that may be clipped
by the right edge of the display. If the length of the formatted Unicode string is
greater than PcdUefiLibMaxPrintBufferSize, then at most the first
PcdUefiLibMaxPrintBufferSize characters are printed. The EFI_HII_FONT_PROTOCOL
is used to convert the string to a bitmap using the glyphs registered with the
HII database. No wrapping is performed, so any portions of the string the fall
outside the active display region will not be displayed.
If a graphics console device is not associated with the ConsoleOutputHandle
defined in the EFI_SYSTEM_TABLE then no string is printed, and 0 is returned.
If the EFI_HII_FONT_PROTOCOL is not present in the handle database, then no
string is printed, and 0 is returned.
If Format is NULL, then ASSERT().
If Format is not aligned on a 16-bit boundary, then ASSERT().
@param PointX X coordinate to print the string.
@param PointY Y coordinate to print the string.
@param ForeGround The foreground color of the string being printed. This is
an optional parameter that may be NULL. If it is NULL,
then the foreground color of the current ConOut device
in the EFI_SYSTEM_TABLE is used.
@param BackGround The background color of the string being printed. This is
an optional parameter that may be NULL. If it is NULL,
then the background color of the current ConOut device
in the EFI_SYSTEM_TABLE is used.
@param Format Null-terminated Unicode format string. See Print Library
for the supported format string syntax.
@param ... Variable argument list whose contents are accessed based on
the format string specified by Format.
@return The number of Unicode characters printed.
**/
UINTN
EFIAPI
PrintXY (
IN UINTN PointX,
IN UINTN PointY,
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *ForeGround, OPTIONAL
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BackGround, OPTIONAL
IN CONST CHAR16 *Format,
...
);
/**
Prints a formatted ASCII string to a graphics console device specified by
ConsoleOutputHandle defined in the EFI_SYSTEM_TABLE at the given (X,Y) coordinates.
This function prints a formatted ASCII string to the graphics console device
specified by ConsoleOutputHandle in EFI_SYSTEM_TABLE and returns the number of
ASCII characters displayed, not including partial characters that may be clipped
by the right edge of the display. If the length of the formatted ASCII string is
greater than PcdUefiLibMaxPrintBufferSize, then at most the first
PcdUefiLibMaxPrintBufferSize characters are printed. The EFI_HII_FONT_PROTOCOL
is used to convert the string to a bitmap using the glyphs registered with the
HII database. No wrapping is performed, so any portions of the string the fall
outside the active display region will not be displayed.
If a graphics console device is not associated with the ConsoleOutputHandle
defined in the EFI_SYSTEM_TABLE then no string is printed, and 0 is returned.
If the EFI_HII_FONT_PROTOCOL is not present in the handle database, then no
string is printed, and 0 is returned.
If Format is NULL, then ASSERT().
@param PointX X coordinate to print the string.
@param PointY Y coordinate to print the string.
@param ForeGround The foreground color of the string being printed. This is
an optional parameter that may be NULL. If it is NULL,
then the foreground color of the current ConOut device
in the EFI_SYSTEM_TABLE is used.
@param BackGround The background color of the string being printed. This is
an optional parameter that may be NULL. If it is NULL,
then the background color of the current ConOut device
in the EFI_SYSTEM_TABLE is used.
@param Format Null-terminated ASCII format string. See Print Library
for the supported format string syntax.
@param ... Variable argument list whose contents are accessed based on
the format string specified by Format.
@return The number of ASCII characters printed.
**/
UINTN
EFIAPI
AsciiPrintXY (
IN UINTN PointX,
IN UINTN PointY,
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *ForeGround, OPTIONAL
IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BackGround, OPTIONAL
IN CONST CHAR8 *Format,
...
);
/**
Installs and completes the initialization of a Driver Binding Protocol instance.
Installs the Driver Binding Protocol specified by DriverBinding onto the handle
specified by DriverBindingHandle. If DriverBindingHandle is NULL, then DriverBinding
is installed onto a newly created handle. DriverBindingHandle is typically the same
as the driver's ImageHandle, but it can be different if the driver produces multiple
Driver Binding Protocols.
If DriverBinding is NULL, then ASSERT().
If DriverBinding can not be installed onto a handle, then ASSERT().
@param ImageHandle The image handle of the driver.
@param SystemTable The EFI System Table that was passed to the driver's entry point.
@param DriverBinding A Driver Binding Protocol instance that this driver is producing.
@param DriverBindingHandle The handle that DriverBinding is to be installed onto. If this
parameter is NULL, then a new handle is created.
@retval EFI_SUCCESS The protocol installation is completed successfully.
@retval EFI_OUT_OF_RESOURCES There was not enough system resources to install the protocol.
@retval Others Status from gBS->InstallMultipleProtocolInterfaces().
**/
EFI_STATUS
EFIAPI
EfiLibInstallDriverBinding (
IN CONST EFI_HANDLE ImageHandle,
IN CONST EFI_SYSTEM_TABLE *SystemTable,
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE DriverBindingHandle
);
/**
Installs and completes the initialization of a Driver Binding Protocol instance and
optionally installs the Component Name, Driver Configuration and Driver Diagnostics Protocols.
Initializes a driver by installing the Driver Binding Protocol together with the
optional Component Name, optional Driver Configure and optional Driver Diagnostic
Protocols onto the driver's DriverBindingHandle. If DriverBindingHandle is NULL,
then the protocols are installed onto a newly created handle. DriverBindingHandle
is typically the same as the driver's ImageHandle, but it can be different if the
driver produces multiple Driver Binding Protocols.
If DriverBinding is NULL, then ASSERT().
If the installation fails, then ASSERT().
@param ImageHandle The image handle of the driver.
@param SystemTable The EFI System Table that was passed to the driver's entry point.
@param DriverBinding A Driver Binding Protocol instance that this driver is producing.
@param DriverBindingHandle The handle that DriverBinding is to be installed onto. If this
parameter is NULL, then a new handle is created.
@param ComponentName A Component Name Protocol instance that this driver is producing.
@param DriverConfiguration A Driver Configuration Protocol instance that this driver is producing.
@param DriverDiagnostics A Driver Diagnostics Protocol instance that this driver is producing.
@retval EFI_SUCCESS The protocol installation is completed successfully.
@retval EFI_OUT_OF_RESOURCES There was not enough memory in pool to install all the protocols.
**/
EFI_STATUS
EFIAPI
EfiLibInstallAllDriverProtocols (
IN CONST EFI_HANDLE ImageHandle,
IN CONST EFI_SYSTEM_TABLE *SystemTable,
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE DriverBindingHandle,
IN CONST EFI_COMPONENT_NAME_PROTOCOL *ComponentName, OPTIONAL
IN CONST EFI_DRIVER_CONFIGURATION_PROTOCOL *DriverConfiguration, OPTIONAL
IN CONST EFI_DRIVER_DIAGNOSTICS_PROTOCOL *DriverDiagnostics OPTIONAL
);
/**
Installs Driver Binding Protocol with optional Component Name and Component Name 2 Protocols.
Initializes a driver by installing the Driver Binding Protocol together with the
optional Component Name and optional Component Name 2 protocols onto the driver's
DriverBindingHandle. If DriverBindingHandle is NULL, then the protocols are installed
onto a newly created handle. DriverBindingHandle is typically the same as the driver's
ImageHandle, but it can be different if the driver produces multiple Driver Binding Protocols.
If DriverBinding is NULL, then ASSERT().
If the installation fails, then ASSERT().
@param ImageHandle The image handle of the driver.
@param SystemTable The EFI System Table that was passed to the driver's entry point.
@param DriverBinding A Driver Binding Protocol instance that this driver is producing.
@param DriverBindingHandle The handle that DriverBinding is to be installed onto. If this
parameter is NULL, then a new handle is created.
@param ComponentName A Component Name Protocol instance that this driver is producing.
@param ComponentName2 A Component Name 2 Protocol instance that this driver is producing.
@retval EFI_SUCCESS The protocol installation is completed successfully.
@retval EFI_OUT_OF_RESOURCES There was not enough memory in pool to install all the protocols.
**/
EFI_STATUS
EFIAPI
EfiLibInstallDriverBindingComponentName2 (
IN CONST EFI_HANDLE ImageHandle,
IN CONST EFI_SYSTEM_TABLE *SystemTable,
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE DriverBindingHandle,
IN CONST EFI_COMPONENT_NAME_PROTOCOL *ComponentName, OPTIONAL
IN CONST EFI_COMPONENT_NAME2_PROTOCOL *ComponentName2 OPTIONAL
);
/**
Installs Driver Binding Protocol with optional Component Name, Component Name 2, Driver
Configuration, Driver Configuration 2, Driver Diagnostics, and Driver Diagnostics 2 Protocols.
Initializes a driver by installing the Driver Binding Protocol together with the optional
Component Name, optional Component Name 2, optional Driver Configuration, optional Driver Configuration 2,
optional Driver Diagnostic, and optional Driver Diagnostic 2 Protocols onto the driver's DriverBindingHandle.
DriverBindingHandle is typically the same as the driver's ImageHandle, but it can be different if the driver
produces multiple Driver Binding Protocols.
If DriverBinding is NULL, then ASSERT().
If the installation fails, then ASSERT().
@param ImageHandle The image handle of the driver.
@param SystemTable The EFI System Table that was passed to the driver's entry point.
@param DriverBinding A Driver Binding Protocol instance that this driver is producing.
@param DriverBindingHandle The handle that DriverBinding is to be installed onto. If this
parameter is NULL, then a new handle is created.
@param ComponentName A Component Name Protocol instance that this driver is producing.
@param ComponentName2 A Component Name 2 Protocol instance that this driver is producing.
@param DriverConfiguration A Driver Configuration Protocol instance that this driver is producing.
@param DriverConfiguration2 A Driver Configuration Protocol 2 instance that this driver is producing.
@param DriverDiagnostics A Driver Diagnostics Protocol instance that this driver is producing.
@param DriverDiagnostics2 A Driver Diagnostics Protocol 2 instance that this driver is producing.
@retval EFI_SUCCESS The protocol installation is completed successfully.
@retval EFI_OUT_OF_RESOURCES There was not enough memory in pool to install all the protocols.
**/
EFI_STATUS
EFIAPI
EfiLibInstallAllDriverProtocols2 (
IN CONST EFI_HANDLE ImageHandle,
IN CONST EFI_SYSTEM_TABLE *SystemTable,
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE DriverBindingHandle,
IN CONST EFI_COMPONENT_NAME_PROTOCOL *ComponentName, OPTIONAL
IN CONST EFI_COMPONENT_NAME2_PROTOCOL *ComponentName2, OPTIONAL
IN CONST EFI_DRIVER_CONFIGURATION_PROTOCOL *DriverConfiguration, OPTIONAL
IN CONST EFI_DRIVER_CONFIGURATION2_PROTOCOL *DriverConfiguration2, OPTIONAL
IN CONST EFI_DRIVER_DIAGNOSTICS_PROTOCOL *DriverDiagnostics, OPTIONAL
IN CONST EFI_DRIVER_DIAGNOSTICS2_PROTOCOL *DriverDiagnostics2 OPTIONAL
);
#endif
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