tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
audk/OldMdePkg/Include/Library/UefiLib.h

712 lines
25 KiB
C
Raw Blame History

/** @file
MDE UEFI library functions and macros
Copyright (c) 2006 - 2007, Intel Corporation
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__
//
// 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;
/**
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.
@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
);
/**
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. In addition, every time a protocol of type ProtocolGuid instance is
installed or reinstalled, the notification function is also executed.
@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.
@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
);
/**
This function creates an event using NotifyTpl, NoifyFunction, and NotifyContext.
This event is signaled with EfiNamedEventSignal(). This provide the ability for
one or more listeners on the same event named by the GUID specified by Name.
@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
);
/**
This function signals the named event specified by Name. The named event must
have been created with EfiNamedEventListen().
@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().
@param VOID
@retvale EFI_TPL The current TPL.
**/
EFI_TPL
EFIAPI
EfiGetCurrentTpl (
VOID
);
/**
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.
@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
);
/**
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 Lock A pointer to the lock data structure to initialize.
@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)
/**
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.
@param Priority The task priority level of the lock.
**/
VOID
EFIAPI
EfiAcquireLock (
IN EFI_LOCK *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.
@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
);
/**
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.
@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
specifed by DriverBindingHandle.
@retval EFI_UNSUPPORTED ControllerHandle is not managed by the driver
specifed 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 ConsumsedGuid 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 Unicoide 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 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 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
);
/**
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
);
/**
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.
@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.
//
/**
Signal a Ready to Boot Event.
Create a Ready to Boot Event. Signal it and close it. This causes other
events of the same event group to be signaled in other modules.
**/
VOID
EFIAPI
EfiSignalEventReadyToBoot (
VOID
);
/**
Signal a Legacy Boot Event.
Create a legacy Boot Event. Signal it and close it. This causes other
events of the same event group to be signaled in other modules.
**/
VOID
EFIAPI
EfiSignalEventLegacyBoot (
VOID
);
/**
Create a Legacy Boot Event.
Tiano extended the CreateEvent Type enum to add a legacy boot event type.
This was bad as Tiano did not own the enum. In UEFI 2.0 CreateEventEx was
added and now it's possible to not voilate the UEFI specification by
declaring a GUID for the legacy boot event class. This library supports
the EDK/EFI 1.10 form and EDK II/UEFI 2.0 form and allows common code to
work both ways.
@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 a Read to Boot Event.
Tiano extended the CreateEvent Type enum to add a ready to boot event type.
This was bad as Tiano did not own the enum. In UEFI 2.0 CreateEventEx was
added and now it's possible to not voilate the UEFI specification and use
the ready to boot event class defined in UEFI 2.0. This library supports
the EDK/EFI 1.10 form and EDKII/UEFI 2.0 form and allows common code to
work both ways.
@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
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 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
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.
Tiano extended the EFI 1.10 device path nodes. Tiano does not own this enum
so as we move to UEFI 2.0 support we must use a mechanism that conforms with
the UEFI 2.0 specification to define the FV device path. An UEFI GUIDed
device path is defined for Tiano extensions of device path. If the code
is compiled to conform with the UEFI 2.0 specification use the new device path
else use the old form for backwards compatability.
@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
Tiano extended the EFI 1.10 device path nodes. Tiano does not own this enum
so as we move to UEFI 2.0 support we must use a mechanism that conforms with
the UEFI 2.0 specification to define the FV device path. An UEFI GUIDed
device path is defined for Tiano extensions of device path. If the code
is compiled to conform with the UEFI 2.0 specification use the new device path
else use the old form for backwards compatability. The return value to this
function points to a location in FvDevicePathNode and it does not allocate
new memory for the GUID pointer that is returned.
@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.
@param Format Null-terminated Unicode format string.
@param ... VARARG list consumed to process Format.
If Format is NULL, then ASSERT().
If Format is not aligned on a 16-bit boundary, then ASSERT().
**/
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.
@param Format Null-terminated Unicode format string.
@param ... VARARG list consumed to process Format.
If Format is NULL, then ASSERT().
If Format is not aligned on a 16-bit boundary, then ASSERT().
**/
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.
@param Format Null-terminated ASCII format string.
@param ... VARARG list consumed to process Format.
If Format is NULL, then ASSERT().
If Format is not aligned on a 16-bit boundary, then ASSERT().
**/
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.
@param Format Null-terminated ASCII format string.
@param ... VARARG list consumed to process Format.
If Format is NULL, then ASSERT().
If Format is not aligned on a 16-bit boundary, then ASSERT().
**/
UINTN
EFIAPI
AsciiErrorPrint (
IN CONST CHAR8 *Format,
...
);
#endif
Reference in New Issue View Git Blame Copy Permalink