mirror of https://github.com/acidanthera/audk.git
543 lines
25 KiB
C
543 lines
25 KiB
C
/** @file
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Provides library functions for each of the UEFI Runtime Services.
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Only available to DXE and UEFI module types.
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Copyright (c) 2006 - 2008, Intel Corporation<BR>
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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_RUNTIME_LIB__
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#define __UEFI_RUNTIME_LIB__
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extern const EFI_EVENT_NOTIFY _gDriverExitBootServicesEvent[];
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extern const EFI_EVENT_NOTIFY _gDriverSetVirtualAddressMapEvent[];
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/**
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This function allows the caller to determine if UEFI ExitBootServices() has been called.
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This function returns TRUE after all the EVT_SIGNAL_EXIT_BOOT_SERVICES functions have
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executed as a result of the OS calling ExitBootServices(). Prior to this time FALSE
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is returned. This function is used by runtime code to decide it is legal to access
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services that go away after ExitBootServices().
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@retval TRUE The system has finished executing the EVT_SIGNAL_EXIT_BOOT_SERVICES event.
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@retval FALSE The system has not finished executing the EVT_SIGNAL_EXIT_BOOT_SERVICES event.
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**/
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BOOLEAN
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EFIAPI
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EfiAtRuntime (
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VOID
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);
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/**
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This function allows the caller to determine if UEFI SetVirtualAddressMap() has been called.
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This function returns TRUE after all the EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE functions have
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executed as a result of the OS calling SetVirtualAddressMap(). Prior to this time FALSE
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is returned. This function is used by runtime code to decide it is legal to access services
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that go away after SetVirtualAddressMap().
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@retval TRUE The system has finished executing the EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.
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@retval FALSE The system has not finished executing the EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.
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**/
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BOOLEAN
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EFIAPI
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EfiGoneVirtual (
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VOID
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);
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/**
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This service is a wrapper for the UEFI Runtime Service GetTime().
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The GetTime() function returns a time that was valid sometime during the call to the function.
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While the returned EFI_TIME structure contains TimeZone and Daylight savings time information,
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the actual clock does not maintain these values. The current time zone and daylight saving time
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information returned by GetTime() are the values that were last set via SetTime().
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The GetTime() function should take approximately the same amount of time to read the time each
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time it is called. All reported device capabilities are to be rounded up.
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During runtime, if a PC-AT CMOS device is present in the platform the caller must synchronize
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access to the device before calling GetTime().
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@param Time A pointer to storage to receive a snapshot of the current time.
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@param Capabilities An optional pointer to a buffer to receive the real time clock device's
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capabilities.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval EFI_INVALID_PARAMETER Time is NULL.
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@retval EFI_DEVICE_ERROR The time could not be retrieved due to a hardware error.
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**/
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EFI_STATUS
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EFIAPI
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EfiGetTime (
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OUT EFI_TIME *Time,
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OUT EFI_TIME_CAPABILITIES *Capabilities OPTIONAL
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);
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/**
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This service is a wrapper for the UEFI Runtime Service SetTime().
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The SetTime() function sets the real time clock device to the supplied time, and records the
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current time zone and daylight savings time information. The SetTime() function is not allowed
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to loop based on the current time. For example, if the device does not support a hardware reset
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for the sub-resolution time, the code is not to implement the feature by waiting for the time to
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wrap.
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During runtime, if a PC-AT CMOS device is present in the platform the caller must synchronize
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access to the device before calling SetTime().
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@param Time A pointer to the current time. Type EFI_TIME is defined in the GetTime()
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function description. Full error checking is performed on the different
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fields of the EFI_TIME structure (refer to the EFI_TIME definition in the
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GetTime() function description for full details), and EFI_INVALID_PARAMETER
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is returned if any field is out of range.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval EFI_INVALID_PARAMETER A time field is out of range.
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@retval EFI_DEVICE_ERROR The time could not be set due to a hardware error.
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**/
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EFI_STATUS
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EFIAPI
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EfiSetTime (
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IN EFI_TIME *Time
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);
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/**
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Returns the current wakeup alarm clock setting.
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The alarm clock time may be rounded from the set alarm clock time to be within the resolution
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of the alarm clock device. The resolution of the alarm clock device is defined to be one second.
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During runtime, if a PC-AT CMOS device is present in the platform the caller must synchronize
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access to the device before calling GetWakeupTime().
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@param Enabled Indicates if the alarm is currently enabled or disabled.
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@param Pending Indicates if the alarm signal is pending and requires acknowledgement.
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@param Time The current alarm setting. Type EFI_TIME is defined in the GetTime()
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function description.
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@retval EFI_SUCCESS The alarm settings were returned.
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@retval EFI_INVALID_PARAMETER Enabled is NULL.
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@retval EFI_INVALID_PARAMETER Pending is NULL.
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@retval EFI_INVALID_PARAMETER Time is NULL.
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@retval EFI_DEVICE_ERROR The wakeup time could not be retrieved due to a hardware error.
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@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.
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**/
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EFI_STATUS
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EFIAPI
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EfiGetWakeupTime (
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OUT BOOLEAN *Enabled,
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OUT BOOLEAN *Pending,
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OUT EFI_TIME *Time
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);
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/**
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Sets the system wakeup alarm clock time.
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@param Enable Enable or disable the wakeup alarm.
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@param Time If Enable is TRUE, the time to set the wakeup alarm for. Type EFI_TIME
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is defined in the GetTime() function description. If Enable is FALSE,
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then this parameter is optional, and may be NULL.
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@retval EFI_SUCCESS If Enable is TRUE, then the wakeup alarm was enabled.
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If Enable is FALSE, then the wakeup alarm was disabled.
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@retval EFI_INVALID_PARAMETER A time field is out of range.
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@retval EFI_DEVICE_ERROR The wakeup time could not be set due to a hardware error.
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@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.
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**/
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EFI_STATUS
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EFIAPI
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EfiSetWakeupTime (
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IN BOOLEAN Enable,
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IN EFI_TIME *Time OPTIONAL
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);
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/**
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Return value of variable.
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@param VariableName the name of the vendor's variable, it's a
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Null-Terminated Unicode String
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@param VendorGuid Unify identifier for vendor.
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@param Attributes Point to memory location to return the attributes of variable. If the point
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is NULL, the parameter would be ignored.
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@param DataSize As input, point to the maxinum size of return Data-Buffer.
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As output, point to the actual size of the returned Data-Buffer.
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@param Data Point to return Data-Buffer.
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@retval EFI_SUCCESS The function completed successfully.
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@retval EFI_NOT_FOUND The variable was not found.
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@retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the result. DataSize has
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been updated with the size needed to complete the request.
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@retval EFI_INVALID_PARAMETER VariableName is NULL.
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@retval EFI_INVALID_PARAMETER VendorGuid is NULL.
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@retval EFI_INVALID_PARAMETER DataSize is NULL.
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@retval EFI_INVALID_PARAMETER The DataSize is not too small and Data is NULL.
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@retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error.
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@retval EFI_SECURITY_VIOLATION The variable could not be retrieved due to an authentication failure.
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**/
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EFI_STATUS
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EFIAPI
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EfiGetVariable (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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OUT UINT32 *Attributes OPTIONAL,
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IN OUT UINTN *DataSize,
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OUT VOID *Data
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);
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/**
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Enumerates variable's name.
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@param VariableNameSize As input, point to maxinum size of variable name.
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As output, point to actual size of varaible name.
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@param VariableName As input, supplies the last VariableName that was returned by
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GetNextVariableName().
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As output, returns the name of variable. The name
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string is Null-Terminated Unicode string.
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@param VendorGuid As input, supplies the last VendorGuid that was returned by
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GetNextVriableName().
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As output, returns the VendorGuid of the current variable.
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@retval EFI_SUCCESS The function completed successfully.
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@retval EFI_NOT_FOUND The next variable was not found.
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@retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result.
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VariableNameSize has been updated with the size needed
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to complete the request.
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@retval EFI_INVALID_PARAMETER VariableNameSize is NULL.
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@retval EFI_INVALID_PARAMETER VariableName is NULL.
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@retval EFI_INVALID_PARAMETER VendorGuid is NULL.
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@retval EFI_DEVICE_ERROR The variable name could not be retrieved due to a hardware error.
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**/
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EFI_STATUS
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EFIAPI
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EfiGetNextVariableName (
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IN OUT UINTN *VariableNameSize,
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IN OUT CHAR16 *VariableName,
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IN OUT EFI_GUID *VendorGuid
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);
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/**
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Sets value of variable.
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@param VariableName the name of the vendor's variable, it's a
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Null-Terminated Unicode String
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@param VendorGuid Unify identifier for vendor.
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@param Attributes Point to memory location to return the attributes of variable. If the point
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is NULL, the parameter would be ignored.
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@param DataSize The size in bytes of Data-Buffer.
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@param Data Point to the content of the variable.
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@retval EFI_SUCCESS The firmware has successfully stored the variable and its data as
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defined by the Attributes.
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@retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied, or the
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DataSize exceeds the maximum allowed.
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@retval EFI_INVALID_PARAMETER VariableName is an empty Unicode string.
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@retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the variable and its data.
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@retval EFI_DEVICE_ERROR The variable could not be saved due to a hardware failure.
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@retval EFI_WRITE_PROTECTED The variable in question is read-only.
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@retval EFI_WRITE_PROTECTED The variable in question cannot be deleted.
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@retval EFI_SECURITY_VIOLATION The variable could not be written due to EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
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set but the AuthInfo does NOT pass the validation check carried
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out by the firmware.
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@retval EFI_NOT_FOUND The variable trying to be updated or deleted was not found.
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**/
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EFI_STATUS
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EFIAPI
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EfiSetVariable (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN UINT32 Attributes,
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IN UINTN DataSize,
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IN VOID *Data
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);
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/**
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Returns the next high 32 bits of platform's monotonic counter.
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@param HighCount Pointer to returned value.
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@retval EFI_SUCCESS The next high monotonic count was returned.
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@retval EFI_DEVICE_ERROR The device is not functioning properly.
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@retval EFI_INVALID_PARAMETER HighCount is NULL.
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**/
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EFI_STATUS
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EFIAPI
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EfiGetNextHighMonotonicCount (
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OUT UINT32 *HighCount
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);
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/**
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Resets the entire platform.
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@param ResetType The type of reset to perform.
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@param ResetStatus The status code for the reset. If the system reset is part of a
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normal operation, the status code would be EFI_SUCCESS. If the system
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reset is due to some type of failure the most appropriate EFI Status
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code would be used.
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@param DataSizeThe size, in bytes, of ResetData.
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@param ResetData For a ResetType of EfiResetCold, EfiResetWarm, or EfiResetShutdown
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the data buffer starts with a Null-terminated Unicode string, optionally
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followed by additional binary data. The string is a description that the
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caller may use to further indicate the reason for the system reset. ResetData
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is only valid if ResetStatus is something other then EFI_SUCCESS. This
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pointer must be a physical address. For a ResetType of EfiRestUpdate the
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data buffer also starts with a Null-terminated string that is followed by
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a physical VOID * to an EFI_CAPSULE_HEADER.
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**/
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VOID
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EFIAPI
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EfiResetSystem (
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IN EFI_RESET_TYPE ResetType,
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IN EFI_STATUS ResetStatus,
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IN UINTN DataSize,
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IN CHAR16 *ResetData
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);
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/**
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This service converts a function pointer from physical to virtual addressing.
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@param DebugDisposition Supplies type information for the pointer being converted.
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@param Address The pointer to a pointer that is to be fixed to be the
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value needed for the new virtual address mapping being
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applied.
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@retval EFI_SUCCESS The pointer pointed to by Address was modified.
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@retval EFI_NOT_FOUND The pointer pointed to by Address was not found to be part of
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the current memory map. This is normally fatal.
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@retval EFI_INVALID_PARAMETER Address is NULL.
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@retval EFI_INVALID_PARAMETER *Address is NULL and DebugDispositio
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**/
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EFI_STATUS
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EFIAPI
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EfiConvertPointer (
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IN UINTN DebugDisposition,
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IN OUT VOID **Address
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);
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/**
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Determines the new virtual address that is to be used on subsequent memory accesses.
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For IA32, X64, and EBC, this service is a wrapper for the UEFI Runtime Service
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ConvertPointer(). See the UEFI Specification for details.
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For IPF, this function interprets Address as a pointer to an EFI_PLABEL structure
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and both the EntryPoint and GP fields of an EFI_PLABEL are converted from physical
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to virtiual addressing. Since IPF allows the GP to point to an address outside
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a PE/COFF image, the physical to virtual offset for the EntryPoint field is used
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to adjust the GP field. The UEFI Runtime Service ConvertPointer() is used to convert
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EntryPoint and the status code for this conversion is always returned. If the convertion
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of EntryPoint fails, then neither EntryPoint nor GP are modified. See the UEFI
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Specification for details on the UEFI Runtime Service ConvertPointer().
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@param DebugDisposition Supplies type information for the pointer being converted.
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@param Address The pointer to a pointer that is to be fixed to be the
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value needed for the new virtual address mapping being
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applied.
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@return EFI_STATUS value from EfiConvertPointer().
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**/
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EFI_STATUS
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EFIAPI
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EfiConvertFunctionPointer (
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IN UINTN DebugDisposition,
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IN OUT VOID **Address
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);
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/**
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Change the runtime addressing mode of EFI firmware from physical to virtual.
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@param MemoryMapSize The size in bytes of VirtualMap.
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@param DescriptorSize The size in bytes of an entry in the VirtualMap.
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@param DescriptorVersion The version of the structure entries in VirtualMap.
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@param VirtualMap An array of memory descriptors which contain new virtual
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address mapping information for all runtime ranges. Type
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EFI_MEMORY_DESCRIPTOR is defined in the
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GetMemoryMap() function description.
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@retval EFI_SUCCESS The virtual address map has been applied.
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@retval EFI_UNSUPPORTED EFI firmware is not at runtime, or the EFI firmware is already in
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virtual address mapped mode.
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@retval EFI_INVALID_PARAMETER DescriptorSize or DescriptorVersion is
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invalid.
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@retval EFI_NO_MAPPING A virtual address was not supplied for a range in the memory
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map that requires a mapping.
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@retval EFI_NOT_FOUND A virtual address was supplied for an address that is not found
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in the memory map.
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**/
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EFI_STATUS
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EFIAPI
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EfiSetVirtualAddressMap (
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IN UINTN MemoryMapSize,
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IN UINTN DescriptorSize,
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IN UINT32 DescriptorVersion,
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IN CONST EFI_MEMORY_DESCRIPTOR *VirtualMap
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);
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/**
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Convert the standard Lib double linked list to a virtual mapping.
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This service uses EfiConvertPointer() to walk a double linked list and convert all the link
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pointers to their virtual mappings. This function is only guaranteed to work during the
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EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event and calling it at other times has undefined results.
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@param DebugDisposition Supplies type information for the pointer being converted.
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@param ListHead Head of linked list to convert.
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@retval EFI_SUCCESS Success to execute the function.
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@retval !EFI_SUCCESS Failed to e3xecute the function.
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**/
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EFI_STATUS
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EFIAPI
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EfiConvertList (
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IN UINTN DebugDisposition,
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IN OUT LIST_ENTRY *ListHead
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);
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/**
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Passes capsules to the firmware with both virtual and physical mapping.
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Depending on the intended consumption, the firmware may
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process the capsule immediately. If the payload should persist across a
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system reset, the reset value returned from EFI_QueryCapsuleCapabilities must
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be passed into ResetSystem() and will cause the capsule to be processed by
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the firmware as part of the reset process.
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@param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules
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being passed into update capsule. Each capsules is assumed to
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stored in contiguous virtual memory. The capsules in the
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CapsuleHeaderArray must be the same capsules as the
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ScatterGatherList. The CapsuleHeaderArray must
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have the capsules in the same order as the ScatterGatherList.
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@param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in
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CaspuleHeaderArray.
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@param ScatterGatherList Physical pointer to a set of
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EFI_CAPSULE_BLOCK_DESCRIPTOR that describes the
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location in physical memory of a set of capsules. See Related
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Definitions for an explanation of how more than one capsule is
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passed via this interface. The capsules in the
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ScatterGatherList must be in the same order as the
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CapsuleHeaderArray. This parameter is only referenced if
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the capsules are defined to persist across system reset.
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@retval EFI_SUCCESS Valid capsule was passed. If CAPSULE_FLAGS_PERSIT_ACROSS_RESET is not set,
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the capsule has been successfully processed by the firmware.
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@retval EFI_INVALID_PARAMETER CapsuleSize or HeaderSize is NULL.
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@retval EFI_INVALID_PARAMETER CapsuleCount is 0
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@retval EFI_DEVICE_ERROR The capsule update was started, but failed due to a device error.
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@retval EFI_UNSUPPORTED The capsule type is not supported on this platform.
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@retval EFI_OUT_OF_RESOURCES There were insufficient resources to process the capsule.
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**/
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EFI_STATUS
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EFIAPI
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EfiUpdateCapsule (
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IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,
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IN UINTN CapsuleCount,
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IN EFI_PHYSICAL_ADDRESS ScatterGatherList OPTIONAL
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);
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/**
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The QueryCapsuleCapabilities() function allows a caller to test to see if a capsule or
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capsules can be updated via UpdateCapsule(). The Flags values in the capsule header and
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size of the entire capsule is checked.
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If the caller needs to query for generic capsule capability a fake EFI_CAPSULE_HEADER can be
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constructed where CapsuleImageSize is equal to HeaderSize that is equal to sizeof
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(EFI_CAPSULE_HEADER). To determine reset requirements,
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CAPSULE_FLAGS_PERSIST_ACROSS_RESET should be set in the Flags field of the
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EFI_CAPSULE_HEADER.
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The firmware must support any capsule that has the
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CAPSULE_FLAGS_PERSIST_ACROSS_RESET flag set in EFI_CAPSULE_HEADER. The
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firmware sets the policy for what capsules are supported that do not have the
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CAPSULE_FLAGS_PERSIST_ACROSS_RESET flag set.
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@param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules
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being passed into update capsule. The capsules are assumed to
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stored in contiguous virtual memory.
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@param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in
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CaspuleHeaderArray.
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@param MaximumCapsuleSize On output the maximum size that UpdateCapsule() can
|
|
support as an argument to UpdateCapsule() via
|
|
CapsuleHeaderArray and ScatterGatherList.
|
|
Undefined on input.
|
|
@param ResetType Returns the type of reset required for the capsule update.
|
|
|
|
@retval EFI_SUCCESS Valid answer returned.
|
|
@retval EFI_INVALID_PARAMETER MaximumCapsuleSize is NULL.
|
|
@retval EFI_UNSUPPORTED The capsule type is not supported on this platform, and
|
|
MaximumCapsuleSize and ResetType are undefined.
|
|
@retval EFI_OUT_OF_RESOURCES There were insufficient resources to process the query request.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
EfiQueryCapsuleCapabilities (
|
|
IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,
|
|
IN UINTN CapsuleCount,
|
|
OUT UINT64 *MaximumCapsuleSize,
|
|
OUT EFI_RESET_TYPE *ResetType
|
|
);
|
|
|
|
|
|
/**
|
|
Returns information about the EFI variables.
|
|
|
|
The QueryVariableInfo() function allows a caller to obtain the information about the
|
|
maximum size of the storage space available for the EFI variables, the remaining size of the storage
|
|
space available for the EFI variables and the maximum size of each individual EFI variable,
|
|
associated with the attributes specified.
|
|
The returned MaximumVariableStorageSize, RemainingVariableStorageSize,
|
|
MaximumVariableSize information may change immediately after the call based on other
|
|
runtime activities including asynchronous error events. Also, these values associated with different
|
|
attributes are not additive in nature.
|
|
|
|
@param Attributes Attributes bitmask to specify the type of variables on
|
|
which to return information. Refer to the
|
|
GetVariable() function description.
|
|
@param MaximumVariableStorageSize
|
|
On output the maximum size of the storage space
|
|
available for the EFI variables associated with the
|
|
attributes specified.
|
|
@param RemainingVariableStorageSize
|
|
Returns the remaining size of the storage space
|
|
available for the EFI variables associated with the
|
|
attributes specified..
|
|
@param MaximumVariableSize Returns the maximum size of the individual EFI
|
|
variables associated with the attributes specified.
|
|
|
|
@retval EFI_SUCCESS Valid answer returned.
|
|
@retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
|
|
@retval EFI_UNSUPPORTED EFI_UNSUPPORTED The attribute is not supported on this platform, and the
|
|
MaximumVariableStorageSize,
|
|
RemainingVariableStorageSize, MaximumVariableSize
|
|
are undefined.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
EfiQueryVariableInfo (
|
|
IN UINT32 Attributes,
|
|
OUT UINT64 *MaximumVariableStorageSize,
|
|
OUT UINT64 *RemainingVariableStorageSize,
|
|
OUT UINT64 *MaximumVariableSize
|
|
);
|
|
|
|
#endif
|
|
|