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/** @file
Implements get/set firmware volume attributes.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
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.
**/
#include "FwVolDriver.h"
/**
Retrieves attributes, insures positive polarity of attribute bits, returns
resulting attributes in output parameter.
@param This Calling context
@param Attributes output buffer which contains attributes
@retval EFI_SUCCESS Successfully got volume attributes
**/
EFI_STATUS
EFIAPI
FvGetVolumeAttributes (
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
OUT EFI_FV_ATTRIBUTES *Attributes
)
{
EFI_STATUS Status;
FV_DEVICE *FvDevice;
EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;
EFI_FVB_ATTRIBUTES_2 FvbAttributes;
FvDevice = FV_DEVICE_FROM_THIS (This);
Fvb = FvDevice->Fvb;
//
// First get the Firmware Volume Block Attributes
//
Status = Fvb->GetAttributes (Fvb, &FvbAttributes);
FvbAttributes &= 0xfffff0ff;
*Attributes = FvbAttributes;
*Attributes |= EFI_FV2_WRITE_POLICY_RELIABLE;
return Status;
}
/**
Sets current attributes for volume.
@param This Calling context
@param Attributes On input, FvAttributes is a pointer to
an EFI_FV_ATTRIBUTES containing the
desired firmware volume settings. On
successful return, it contains the new
settings of the firmware volume. On
unsuccessful return, FvAttributes is not
modified and the firmware volume
settings are not changed.
@retval EFI_SUCCESS The requested firmware volume attributes
were set and the resulting
EFI_FV_ATTRIBUTES is returned in
FvAttributes.
@retval EFI_ACCESS_DENIED Atrribute is locked down.
@retval EFI_INVALID_PARAMETER Atrribute is not valid.
**/
EFI_STATUS
EFIAPI
FvSetVolumeAttributes (
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN OUT EFI_FV_ATTRIBUTES *Attributes
)
{
EFI_STATUS Status;
FV_DEVICE *FvDevice;
EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;
EFI_FVB_ATTRIBUTES_2 OldFvbAttributes;
EFI_FVB_ATTRIBUTES_2 NewFvbAttributes;
UINT64 NewStatus;
UINT32 Capabilities;
FvDevice = FV_DEVICE_FROM_THIS (This);
Fvb = FvDevice->Fvb;
//
// First get the current Volume Attributes
//
Status = Fvb->GetAttributes (
Fvb,
&OldFvbAttributes
);
if ((OldFvbAttributes & EFI_FVB2_LOCK_STATUS) != 0) {
return EFI_ACCESS_DENIED;
}
//
// Only status attributes can be updated.
//
Capabilities = OldFvbAttributes & EFI_FVB2_CAPABILITIES;
NewStatus = (*Attributes) & EFI_FVB2_STATUS;
//
// Test read disable
//
if ((Capabilities & EFI_FVB2_READ_DISABLED_CAP) == 0) {
if ((NewStatus & EFI_FVB2_READ_STATUS) == 0) {
return EFI_INVALID_PARAMETER;
}
}
//
// Test read enable
//
if ((Capabilities & EFI_FVB2_READ_ENABLED_CAP) == 0) {
if ((NewStatus & EFI_FVB2_READ_STATUS) != 0) {
return EFI_INVALID_PARAMETER;
}
}
//
// Test write disable
//
if ((Capabilities & EFI_FVB2_WRITE_DISABLED_CAP) == 0) {
if ((NewStatus & EFI_FVB2_WRITE_STATUS) == 0) {
return EFI_INVALID_PARAMETER;
}
}
//
// Test write enable
//
if ((Capabilities & EFI_FVB2_WRITE_ENABLED_CAP) == 0) {
if ((NewStatus & EFI_FVB2_WRITE_STATUS) != 0) {
return EFI_INVALID_PARAMETER;
}
}
//
// Test lock
//
if ((Capabilities & EFI_FVB2_LOCK_CAP) == 0) {
if ((NewStatus & EFI_FVB2_LOCK_STATUS) != 0) {
return EFI_INVALID_PARAMETER;
}
}
NewFvbAttributes = OldFvbAttributes & (0xFFFFFFFF & (~EFI_FVB2_STATUS));
NewFvbAttributes |= NewStatus;
Status = Fvb->SetAttributes (
Fvb,
&NewFvbAttributes
);
if (EFI_ERROR (Status)) {
return Status;
}
*Attributes = 0;
This->GetVolumeAttributes (
This,
Attributes
);
return EFI_SUCCESS;
}
/**
Return information of type InformationType for the requested firmware
volume.
@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
@param InformationType InformationType for requested.
@param BufferSize On input, size of Buffer.On output, the amount of
data returned in Buffer.
@param Buffer A poniter to the data buffer to return.
@return EFI_UNSUPPORTED Could not get.
**/
EFI_STATUS
EFIAPI
FvGetVolumeInfo (
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN CONST EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
return EFI_UNSUPPORTED;
}
/**
Set information with InformationType into the requested firmware volume.
@param This Pointer to EFI_FIRMWARE_VOLUME2_PROTOCOL.
@param InformationType InformationType for requested.
@param BufferSize Size of Buffer data.
@param Buffer A poniter to the data buffer to be set.
@retval EFI_UNSUPPORTED Could not set.
**/
EFI_STATUS
EFIAPI
FvSetVolumeInfo (
IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
IN CONST EFI_GUID *InformationType,
IN UINTN BufferSize,
IN CONST VOID *Buffer
)
{
return EFI_UNSUPPORTED;
}
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