edkiiglueuefilib.h

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/*++

Copyright (c) 2004 - 2006, 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.  


Module Name:

  EdkIIGlueUefiLib.h
  
Abstract: 

  Public header file for UEFI Lib

--*/

#ifndef __EDKII_GLUE_UEFI_LIB_H__
#define __EDKII_GLUE_UEFI_LIB_H__


#define EfiInitializeLock(_LOCK, _PRIORITY)                             GlueEfiInitializeLock(_LOCK, _PRIORITY)
#define EfiAcquireLock(_LOCK)                                           GlueEfiAcquireLock(_LOCK)
#define EfiAcquireLockOrFail(_LOCK)                                     GlueEfiAcquireLockOrFail(_LOCK)
#define EfiReleaseLock(_LOCK)                                           GlueEfiReleaseLock(_LOCK)
#define GetGlyphWidth(_UNICODECHAR)                                     GlueGetGlyphWidth(_UNICODECHAR)
#define EfiCreateEventLegacyBoot(_LEGACYBOOT)                           GlueEfiCreateEventLegacyBoot(_LEGACYBOOT)
#define EfiCreateEventReadyToBoot(_READYTOBOOTEVENT)                    GlueEfiCreateEventReadyToBoot(_READYTOBOOTEVENT)
#define EfiGetNameGuidFromFwVolDevicePathNode(_FVDEVICEPATHNODE)        GlueEfiGetNameGuidFromFwVolDevicePathNode(_FVDEVICEPATHNODE)
#define EfiInitializeFwVolDevicepathNode(_FVDEVICEPATHNODE, _NAMEGUID)  GlueEfiInitializeFwVolDevicepathNode(_FVDEVICEPATHNODE, _NAMEGUID)


//
// Unicode String Table
//
typedef struct {
  CHAR8   *Language;
  CHAR16  *UnicodeString;
} GLUE_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;
} GLUE_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
  );

/**
  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
GlueEfiInitializeLock (
  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.

**/
#ifdef EFI_INITIALIZE_LOCK_VARIABLE
#undef EFI_INITIALIZE_LOCK_VARIABLE
#endif

#define EFI_INITIALIZE_LOCK_VARIABLE(Priority) \
  {Priority, EFI_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.

**/
#ifdef ASSERT_LOCKED
#undef ASSERT_LOCKED
#endif

#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
GlueEfiAcquireLock (
  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
GlueEfiAcquireLockOrFail (
  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
GlueEfiReleaseLock (
  IN EFI_LOCK  *Lock
  );

/**
  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.