mirror of https://github.com/acidanthera/audk.git
487 lines
17 KiB
C
487 lines
17 KiB
C
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/** @file
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MDE UEFI library functions and macros
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef __UEFI_LIB_H__
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#define __UEFI_LIB_H__
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//
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// Unicode String Table
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//
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typedef struct {
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CHAR8 *Language;
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CHAR16 *UnicodeString;
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} EFI_UNICODE_STRING_TABLE;
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//
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// EFI Lock Status
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//
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typedef enum {
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EfiLockUninitialized = 0,
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EfiLockReleased = 1,
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EfiLockAcquired = 2
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} EFI_LOCK_STATE;
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//
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// EFI Lock
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//
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typedef struct {
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EFI_TPL Tpl;
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EFI_TPL OwnerTpl;
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EFI_LOCK_STATE Lock;
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} EFI_LOCK;
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/**
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This function searches the list of configuration tables stored in the EFI System
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Table for a table with a GUID that matches TableGuid. If a match is found,
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then a pointer to the configuration table is returned in Table, and EFI_SUCCESS
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is returned. If a matching GUID is not found, then EFI_NOT_FOUND is returned.
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@param TableGuid Pointer to table's GUID type..
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@param Table Pointer to the table associated with TableGuid in the EFI System Table.
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@retval EFI_SUCCESS A configuration table matching TableGuid was found.
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@retval EFI_NOT_FOUND A configuration table matching TableGuid could not be found.
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**/
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EFI_STATUS
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EFIAPI
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EfiGetSystemConfigurationTable (
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IN EFI_GUID *TableGuid,
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OUT VOID **Table
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);
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/**
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This function causes the notification function to be executed for every protocol
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of type ProtocolGuid instance that exists in the system when this function is
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invoked. In addition, every time a protocol of type ProtocolGuid instance is
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installed or reinstalled, the notification function is also executed.
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@param ProtocolGuid Supplies GUID of the protocol upon whose installation the event is fired.
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@param NotifyTpl Supplies the task priority level of the event notifications.
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@param NotifyFunction Supplies the function to notify when the event is signaled.
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@param NotifyContext The context parameter to pass to NotifyFunction.
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@param Registration A pointer to a memory location to receive the registration value.
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@return The notification event that was created.
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**/
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EFI_EVENT
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EFIAPI
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EfiCreateProtocolNotifyEvent(
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IN EFI_GUID *ProtocolGuid,
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IN EFI_TPL NotifyTpl,
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IN EFI_EVENT_NOTIFY NotifyFunction,
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IN VOID *NotifyContext, OPTIONAL
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OUT VOID *Registration
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);
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/**
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This function creates an event using NotifyTpl, NoifyFunction, and NotifyContext.
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This event is signaled with EfiNamedEventSignal(). This provide the ability for
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one or more listeners on the same event named by the GUID specified by Name.
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@param Name Supplies GUID name of the event.
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@param NotifyTpl Supplies the task priority level of the event notifications.
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@param NotifyFunction Supplies the function to notify when the event is signaled.
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@param NotifyContext The context parameter to pass to NotifyFunction.
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@param Registration A pointer to a memory location to receive the registration value.
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@retval EFI_SUCCESS A named event was created.
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@retval EFI_OUT_OF_RESOURCES There are not enough resource to create the named event.
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**/
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EFI_STATUS
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EFIAPI
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EfiNamedEventListen (
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IN CONST EFI_GUID *Name,
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IN EFI_TPL NotifyTpl,
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IN EFI_EVENT_NOTIFY NotifyFunction,
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IN CONST VOID *NotifyContext, OPTIONAL
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OUT VOID *Registration OPTIONAL
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);
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/**
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This function signals the named event specified by Name. The named event must
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have been created with EfiNamedEventListen().
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@param Name Supplies GUID name of the event.
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@retval EFI_SUCCESS A named event was signaled.
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@retval EFI_OUT_OF_RESOURCES There are not enough resource to signal the named event.
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**/
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EFI_STATUS
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EFIAPI
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EfiNamedEventSignal (
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IN CONST EFI_GUID *Name
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);
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/**
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This function initializes a basic mutual exclusion lock to the released state
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and returns the lock. Each lock provides mutual exclusion access at its task
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priority level. Since there is no preemption or multiprocessor support in EFI,
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acquiring the lock only consists of raising to the locks TPL.
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@param Lock A pointer to the lock data structure to initialize.
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@param Priority EFI TPL associated with the lock.
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@return The lock.
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**/
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EFI_LOCK *
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EFIAPI
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EfiInitializeLock (
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IN OUT EFI_LOCK *Lock,
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IN EFI_TPL Priority
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);
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/**
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This macro initializes the contents of a basic mutual exclusion lock to the
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released state. Each lock provides mutual exclusion access at its task
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priority level. Since there is no preemption or multiprocessor support in EFI,
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acquiring the lock only consists of raising to the locks TPL.
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@param Lock A pointer to the lock data structure to initialize.
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@param Priority The task priority level of the lock.
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@return The lock.
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**/
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#define EFI_INITIALIZE_LOCK_VARIABLE(Priority) \
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{Priority, EFI_TPL_APPLICATION, EfiLockReleased }
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/**
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Macro that calls DebugAssert() if an EFI_LOCK structure is not in the locked state.
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If the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set,
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then this macro evaluates the EFI_LOCK structure specified by Lock. If Lock
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is not in the locked state, then DebugAssert() is called passing in the source
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filename, source line number, and Lock.
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If Lock is NULL, then ASSERT().
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@param LockParameter A pointer to the lock to acquire.
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**/
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#define ASSERT_LOCKED(LockParameter) \
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do { \
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if (DebugAssertEnabled ()) { \
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ASSERT (LockParameter != NULL); \
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if ((LockParameter)->Lock != EfiLockAcquired) { \
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_ASSERT (LockParameter not locked); \
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} \
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} \
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} while (FALSE)
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/**
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This function raises the system<EFBFBD><EFBFBD>s current task priority level to the task
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priority level of the mutual exclusion lock. Then, it places the lock in the
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acquired state.
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@param Priority The task priority level of the lock.
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**/
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VOID
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EFIAPI
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EfiAcquireLock (
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IN EFI_LOCK *Lock
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);
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/**
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This function raises the system<EFBFBD><EFBFBD>s current task priority level to the task
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priority level of the mutual exclusion lock. Then, it attempts to place the
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lock in the acquired state.
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@param Lock A pointer to the lock to acquire.
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@retval EFI_SUCCESS The lock was acquired.
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@retval EFI_ACCESS_DENIED The lock could not be acquired because it is already owned.
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**/
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EFI_STATUS
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EFIAPI
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EfiAcquireLockOrFail (
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IN EFI_LOCK *Lock
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);
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/**
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This function transitions a mutual exclusion lock from the acquired state to
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the released state, and restores the system<EFBFBD><EFBFBD>s task priority level to its
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previous level.
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@param Lock A pointer to the lock to release.
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**/
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VOID
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EFIAPI
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EfiReleaseLock (
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IN EFI_LOCK *Lock
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);
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/**
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This function looks up a Unicode string in UnicodeStringTable. If Language is
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a member of SupportedLanguages and a Unicode string is found in UnicodeStringTable
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that matches the language code specified by Language, then it is returned in
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UnicodeString.
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@param Language A pointer to the ISO 639-2 language code for the
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Unicode string to look up and return.
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@param SupportedLanguages A pointer to the set of ISO 639-2 language codes
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that the Unicode string table supports. Language
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must be a member of this set.
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@param UnicodeStringTable A pointer to the table of Unicode strings.
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@param UnicodeString A pointer to the Unicode string from UnicodeStringTable
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that matches the language specified by Language.
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@retval EFI_SUCCESS The Unicode string that matches the language
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specified by Language was found
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in the table of Unicoide strings UnicodeStringTable,
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and it was returned in UnicodeString.
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@retval EFI_INVALID_PARAMETER Language is NULL.
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@retval EFI_INVALID_PARAMETER UnicodeString is NULL.
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@retval EFI_UNSUPPORTED SupportedLanguages is NULL.
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@retval EFI_UNSUPPORTED UnicodeStringTable is NULL.
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@retval EFI_UNSUPPORTED The language specified by Language is not a
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member of SupportedLanguages.
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@retval EFI_UNSUPPORTED The language specified by Language is not
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supported by UnicodeStringTable.
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**/
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EFI_STATUS
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EFIAPI
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LookupUnicodeString (
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IN CONST CHAR8 *Language,
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IN CONST CHAR8 *SupportedLanguages,
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IN CONST EFI_UNICODE_STRING_TABLE *UnicodeStringTable,
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OUT CHAR16 **UnicodeString
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);
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/**
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This function adds a Unicode string to UnicodeStringTable.
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If Language is a member of SupportedLanguages then UnicodeString is added to
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UnicodeStringTable. New buffers are allocated for both Language and
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UnicodeString. The contents of Language and UnicodeString are copied into
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these new buffers. These buffers are automatically freed when
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FreeUnicodeStringTable() is called.
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@param Language A pointer to the ISO 639-2 language code for the Unicode
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string to add.
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@param SupportedLanguages A pointer to the set of ISO 639-2 language codes
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that the Unicode string table supports.
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Language must be a member of this set.
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@param UnicodeStringTable A pointer to the table of Unicode strings.
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@param UnicodeString A pointer to the Unicode string to add.
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@retval EFI_SUCCESS The Unicode string that matches the language
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specified by Language was found in the table of
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Unicode strings UnicodeStringTable, and it was
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returned in UnicodeString.
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@retval EFI_INVALID_PARAMETER Language is NULL.
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@retval EFI_INVALID_PARAMETER UnicodeString is NULL.
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@retval EFI_INVALID_PARAMETER UnicodeString is an empty string.
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@retval EFI_UNSUPPORTED SupportedLanguages is NULL.
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@retval EFI_ALREADY_STARTED A Unicode string with language Language is
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already present in UnicodeStringTable.
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@retval EFI_OUT_OF_RESOURCES There is not enough memory to add another
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Unicode string to UnicodeStringTable.
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@retval EFI_UNSUPPORTED The language specified by Language is not a
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member of SupportedLanguages.
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**/
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EFI_STATUS
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EFIAPI
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AddUnicodeString (
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IN CONST CHAR8 *Language,
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IN CONST CHAR8 *SupportedLanguages,
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IN EFI_UNICODE_STRING_TABLE **UnicodeStringTable,
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IN CONST CHAR16 *UnicodeString
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);
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/**
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This function frees the table of Unicode strings in UnicodeStringTable.
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If UnicodeStringTable is NULL, then EFI_SUCCESS is returned.
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Otherwise, each language code, and each Unicode string in the Unicode string
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table are freed, and EFI_SUCCESS is returned.
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@param UnicodeStringTable A pointer to the table of Unicode strings.
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@retval EFI_SUCCESS The Unicode string table was freed.
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**/
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EFI_STATUS
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EFIAPI
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FreeUnicodeStringTable (
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IN EFI_UNICODE_STRING_TABLE *UnicodeStringTable
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);
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/**
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This function computes and returns the width of the Unicode character
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specified by UnicodeChar.
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@param UnicodeChar A Unicode character.
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@retval 0 The width if UnicodeChar could not be determined.
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@retval 1 UnicodeChar is a narrow glyph.
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@retval 2 UnicodeChar is a wide glyph.
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**/
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UINTN
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EFIAPI
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GetGlyphWidth (
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IN CHAR16 UnicodeChar
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);
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/**
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This function computes and returns the display length of
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the Null-terminated Unicode string specified by String.
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If String is NULL, then 0 is returned.
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If any of the widths of the Unicode characters in String
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can not be determined, then 0 is returned.
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@param String A pointer to a Null-terminated Unicode string.
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@return The display length of the Null-terminated Unicode string specified by String.
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**/
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UINTN
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EFIAPI
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UnicodeStringDisplayLength (
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IN CONST CHAR16 *String
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);
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//
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// Functions that abstract early Framework contamination of UEFI.
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//
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/**
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Signal a Ready to Boot Event.
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|||
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|
|
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 R8.5/EFI 1.10 form and R9/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 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 R8.5/EFI 1.10 form and R9/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
|
|||
|
|
);
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
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 PIWG 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 MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvDevicePathNode,
|
|||
|
|
IN 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 PIWG 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 MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvDevicePathNode
|
|||
|
|
);
|
|||
|
|
|
|||
|
|
|
|||
|
|
#endif
|