diff options
| author | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-06-28 11:55:39 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-06-28 11:55:39 +0000 |
| commit | a190687a9786279c67459a7f5162fe50a1d0d5d7 (patch) | |
| tree | eaf22f1ccc7355edd300991f20357f82f734b174 /MdeModulePkg/Library/EdkFvbServiceLib | |
| parent | 318ace1ea6248ff3033f041d608b6b02f6059856 (diff) | |
| download | edk2-platforms-a190687a9786279c67459a7f5162fe50a1d0d5d7.tar.xz | |
add ia32 and x64 direcotry for EdkFvbServiceLib
updated module VariableRuntimeDxe
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2844 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Library/EdkFvbServiceLib')
| -rw-r--r-- | MdeModulePkg/Library/EdkFvbServiceLib/Ia32/Fvb.c | 610 | ||||
| -rw-r--r-- | MdeModulePkg/Library/EdkFvbServiceLib/X64/Fvb.c | 614 |
2 files changed, 1224 insertions, 0 deletions
diff --git a/MdeModulePkg/Library/EdkFvbServiceLib/Ia32/Fvb.c b/MdeModulePkg/Library/EdkFvbServiceLib/Ia32/Fvb.c new file mode 100644 index 0000000000..3ec0d6f9eb --- /dev/null +++ b/MdeModulePkg/Library/EdkFvbServiceLib/Ia32/Fvb.c @@ -0,0 +1,610 @@ +/**@file
+
+ Firmware Volume Block Protocol Runtime Abstraction
+
+ mFvbEntry is an array of Handle Fvb pairs. The Fvb Lib Instance matches the
+ index in the mFvbEntry array. This should be the same sequence as the FVB's
+ were described in the HOB. We have to remember the handle so we can tell if
+ the protocol has been reinstalled and it needs updateing.
+
+ If you are using any of these lib functions.you must first call FvbInitialize ().
+
+Copyright (c) 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.
+
+**/
+
+
+#include "Fvb.h"
+
+//
+// Event for Exit Boot Services Callback
+//
+STATIC EFI_EVENT mExitBootServicesEvent = NULL;
+
+//
+// Lib will ASSERT if more FVB devices than this are added to the system.
+//
+STATIC FVB_ENTRY *mFvbEntry;
+STATIC EFI_EVENT mFvbRegistration;
+STATIC BOOLEAN mEfiFvbInitialized = FALSE;
+STATIC UINTN mFvbCount;
+
+/**
+ Check whether an address is runtime memory or not.
+
+ @param Address The Address being checked.
+
+ @retval TRUE The address is runtime memory.
+ @retval FALSE The address is not runtime memory.
+**/
+BOOLEAN
+IsRuntimeMemory (
+ IN VOID *Address
+ )
+{
+ EFI_STATUS Status;
+ UINT8 TmpMemoryMap[1];
+ UINTN MapKey;
+ UINTN DescriptorSize;
+ UINT32 DescriptorVersion;
+ UINTN MemoryMapSize;
+ EFI_MEMORY_DESCRIPTOR *MemoryMap;
+ EFI_MEMORY_DESCRIPTOR *MemoryMapPtr;
+ BOOLEAN IsRuntime;
+ UINTN Index;
+
+ IsRuntime = FALSE;
+
+ //
+ // Get System MemoryMapSize
+ //
+ MemoryMapSize = 1;
+ Status = gBS->GetMemoryMap (
+ &MemoryMapSize,
+ (EFI_MEMORY_DESCRIPTOR *)TmpMemoryMap,
+ &MapKey,
+ &DescriptorSize,
+ &DescriptorVersion
+ );
+ ASSERT (Status == EFI_BUFFER_TOO_SMALL);
+ //
+ // Enlarge space here, because we will allocate pool now.
+ //
+ MemoryMapSize += EFI_PAGE_SIZE;
+ Status = gBS->AllocatePool (
+ EfiBootServicesData,
+ MemoryMapSize,
+ (VOID**)&MemoryMap
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Get System MemoryMap
+ //
+ Status = gBS->GetMemoryMap (
+ &MemoryMapSize,
+ MemoryMap,
+ &MapKey,
+ &DescriptorSize,
+ &DescriptorVersion
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ MemoryMapPtr = MemoryMap;
+ //
+ // Search the request Address
+ //
+ for (Index = 0; Index < (MemoryMapSize / DescriptorSize); Index++) {
+ if (((EFI_PHYSICAL_ADDRESS)(UINTN)Address >= MemoryMap->PhysicalStart) &&
+ ((EFI_PHYSICAL_ADDRESS)(UINTN)Address < MemoryMap->PhysicalStart
+ + LShiftU64 (MemoryMap->NumberOfPages, EFI_PAGE_SHIFT))) {
+ //
+ // Found it
+ //
+ if (MemoryMap->Attribute & EFI_MEMORY_RUNTIME) {
+ IsRuntime = TRUE;
+ }
+ break;
+ }
+ //
+ // Get next item
+ //
+ MemoryMap = (EFI_MEMORY_DESCRIPTOR *)((UINTN)MemoryMap + DescriptorSize);
+ }
+
+ //
+ // Done
+ //
+ gBS->FreePool (MemoryMapPtr);
+
+ return IsRuntime;
+}
+
+/**
+ Update mFvbEntry. Add new entry, or update existing entry if Fvb protocol is
+ reinstalled.
+
+ @param Event The Event that is being processed
+ @param Context Event Context
+
+**/
+STATIC
+VOID
+EFIAPI
+FvbNotificationEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+ UINTN BufferSize;
+ EFI_HANDLE Handle;
+ UINTN Index;
+ UINTN UpdateIndex;
+
+ while (TRUE) {
+ BufferSize = sizeof (Handle);
+ Status = gBS->LocateHandle (
+ ByRegisterNotify,
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ mFvbRegistration,
+ &BufferSize,
+ &Handle
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // Exit Path of While Loop....
+ //
+ break;
+ }
+
+ UpdateIndex = MAX_FVB_COUNT;
+ for (Index = 0; Index < mFvbCount; Index++) {
+ if (mFvbEntry[Index].Handle == Handle) {
+ //
+ // If the handle is already in the table just update the protocol
+ //
+ UpdateIndex = Index;
+ break;
+ }
+ }
+
+ if (UpdateIndex == MAX_FVB_COUNT) {
+ //
+ // Use the next free slot for a new entry
+ //
+ UpdateIndex = mFvbCount++;
+ //
+ // Check the UpdateIndex whether exceed the maximum value.
+ //
+ ASSERT (UpdateIndex < MAX_FVB_COUNT);
+ mFvbEntry[UpdateIndex].Handle = Handle;
+ }
+ //
+ // The array does not have enough entries
+ //
+ ASSERT (UpdateIndex < MAX_FVB_COUNT);
+
+ //
+ // Get the interface pointer and if it's ours, skip it
+ //
+ Status = gBS->HandleProtocol (
+ Handle,
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ (VOID **) &mFvbEntry[UpdateIndex].Fvb
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->HandleProtocol (
+ Handle,
+ &gEfiFvbExtensionProtocolGuid,
+ (VOID **) &mFvbEntry[UpdateIndex].FvbExtension
+ );
+ if (Status != EFI_SUCCESS) {
+ mFvbEntry[UpdateIndex].FvbExtension = NULL;
+ }
+
+ //
+ // Check the FVB can be accessed in RUNTIME, The FVBs in FVB handle list comes
+ // from two way:
+ // 1) Dxe Core. (FVB information is transferred from FV HOB).
+ // 2) FVB driver.
+ // The FVB produced Dxe core is used for discoverying DXE driver and dispatch. These
+ // FVBs can only be accessed in boot time.
+ // FVB driver will discovery all FV in FLASH and these FVBs can be accessed in runtime.
+ // The FVB itself produced by FVB driver is allocated in runtime memory. So we can
+ // determine the what FVB can be accessed in RUNTIME by judging whether FVB itself is allocated
+ // in RUNTIME memory.
+ //
+ mFvbEntry[UpdateIndex].IsRuntimeAccess = IsRuntimeMemory (mFvbEntry[UpdateIndex].Fvb);
+ }
+}
+
+/**
+ Convert all pointers in mFvbEntry after ExitBootServices.
+
+ @param Event The Event that is being processed
+ @param Context Event Context
+
+**/
+VOID
+EFIAPI
+FvbVirtualAddressChangeNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ UINTN Index;
+ if (mFvbEntry != NULL) {
+ for (Index = 0; Index < MAX_FVB_COUNT; Index++) {
+ if (!mFvbEntry[Index].IsRuntimeAccess) {
+ continue;
+ }
+
+ if (NULL != mFvbEntry[Index].Fvb) {
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->GetBlockSize);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->GetPhysicalAddress);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->GetAttributes);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->SetAttributes);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->Read);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->Write);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->EraseBlocks);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb);
+ }
+
+ if (NULL != mFvbEntry[Index].FvbExtension) {
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].FvbExtension->EraseFvbCustomBlock);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].FvbExtension);
+ }
+ }
+
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry);
+ }
+}
+
+/**
+ Library constructor function entry.
+
+ @param ImageHandle The handle of image who call this libary.
+ @param SystemTable The point of System Table.
+
+ @retval EFI_SUCESS Sucess construct this library.
+ @retval Others Fail to contruct this libary.
+**/
+EFI_STATUS
+EFIAPI
+FvbLibInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ UINTN Status;
+ mFvbCount = 0;
+
+ Status = gBS->AllocatePool (
+ EfiRuntimeServicesData,
+ (UINTN) sizeof (FVB_ENTRY) * MAX_FVB_COUNT,
+ (VOID *) &mFvbEntry
+ );
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ ZeroMem (mFvbEntry, sizeof (FVB_ENTRY) * MAX_FVB_COUNT);
+
+ EfiCreateProtocolNotifyEvent (
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ TPL_CALLBACK,
+ FvbNotificationEvent,
+ NULL,
+ &mFvbRegistration
+ );
+
+ //
+ // Register SetVirtualAddressMap () notify function
+ //
+ Status = gBS->CreateEvent (
+ EVT_SIGNAL_EXIT_BOOT_SERVICES,
+ TPL_NOTIFY,
+ FvbVirtualAddressChangeNotifyEvent,
+ NULL,
+ &mExitBootServicesEvent
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ mEfiFvbInitialized = TRUE;
+
+ return EFI_SUCCESS;
+}
+
+//
+// =============================================================================
+// The following functions wrap Fvb protocol in the Runtime Lib functions.
+// The Instance translates into Fvb instance. The Fvb order defined by HOBs and
+// thus the sequence of FVB protocol addition define Instance.
+//
+// EfiFvbInitialize () must be called before any of the following functions
+// must be called.
+// =============================================================================
+//
+
+/**
+ Reads specified number of bytes into a buffer from the specified block
+
+ @param Instance The FV instance to be read from.
+ @param Lba The logical block address to be read from
+ @param Offset Offset into the block at which to begin reading
+ @param NumBytes Pointer that on input contains the total size of
+ the buffer. On output, it contains the total number
+ of bytes read
+ @param Buffer Pointer to a caller allocated buffer that will be
+ used to hold the data read
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to Read block
+ @retval Others Fail to read block
+**/
+EFI_STATUS
+EfiFvbReadBlock (
+ IN UINTN Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN OUT UINTN *NumBytes,
+ IN UINT8 *Buffer
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->Read (mFvbEntry[Instance].Fvb, Lba, Offset, NumBytes, Buffer);
+}
+
+/**
+ Writes specified number of bytes from the input buffer to the block
+
+ @param Instance The FV instance to be written to
+ @param Lba The starting logical block index to write to
+ @param Offset Offset into the block at which to begin writing
+ @param NumBytes Pointer that on input contains the total size of
+ the buffer. On output, it contains the total number
+ of bytes actually written
+ @param Buffer Pointer to a caller allocated buffer that contains
+ the source for the write
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to write block
+ @retval Others Fail to write block
+**/
+EFI_STATUS
+EfiFvbWriteBlock (
+ IN UINTN Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN OUT UINTN *NumBytes,
+ IN UINT8 *Buffer
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->Write (mFvbEntry[Instance].Fvb, Lba, Offset, NumBytes, Buffer);
+}
+
+/**
+ Erases and initializes a firmware volume block
+
+ @param Instance The FV instance to be erased
+ @param Lba The logical block index to be erased
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to erase block
+ @retval Others Fail to erase block
+**/
+EFI_STATUS
+EfiFvbEraseBlock (
+ IN UINTN Instance,
+ IN EFI_LBA Lba
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->EraseBlocks (mFvbEntry[Instance].Fvb, Lba, -1);
+}
+
+/**
+ Retrieves attributes, insures positive polarity of attribute bits, returns
+ resulting attributes in output parameter
+
+ @param Instance The FV instance whose attributes is going to be returned
+ @param Attributes Output buffer which contains attributes
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to get Fv attribute
+ @retval Others Fail to get Fv attribute
+**/
+EFI_STATUS
+EfiFvbGetVolumeAttributes (
+ IN UINTN Instance,
+ OUT EFI_FVB_ATTRIBUTES *Attributes
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->GetAttributes (mFvbEntry[Instance].Fvb, Attributes);
+}
+
+/**
+ Modifies the current settings of the firmware volume according to the
+ input parameter, and returns the new setting of the volume
+
+ @param Instance The FV instance whose attributes is going to be
+ modified
+ @param Attributes On input, it is a pointer to EFI_FVB_ATTRIBUTES
+ containing the desired firmware volume settings.
+ On successful return, it contains the new settings
+ of the firmware volume
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to set Fv attribute
+ @retval Others Fail to set Fv attribute
+**/
+EFI_STATUS
+EfiFvbSetVolumeAttributes (
+ IN UINTN Instance,
+ IN EFI_FVB_ATTRIBUTES Attributes
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->SetAttributes (mFvbEntry[Instance].Fvb, &Attributes);
+}
+
+/**
+ Retrieves the physical address of a memory mapped FV
+
+ @param Instance The FV instance whose base address is going to be
+ returned
+ @param BaseAddress Pointer to a caller allocated EFI_PHYSICAL_ADDRESS
+ that on successful return, contains the base address
+ of the firmware volume.
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to get physical address
+ @retval Others Fail to get physical address
+**/
+EFI_STATUS
+EfiFvbGetPhysicalAddress (
+ IN UINTN Instance,
+ OUT EFI_PHYSICAL_ADDRESS *BaseAddress
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->GetPhysicalAddress (mFvbEntry[Instance].Fvb, BaseAddress);
+}
+
+/**
+ Retrieve the size of a logical block
+
+ @param Instance The FV instance whose block size is going to be
+ returned
+ @param Lba Indicates which block to return the size for.
+ @param BlockSize A pointer to a caller allocated UINTN in which
+ the size of the block is returned
+ @param NumOfBlocks a pointer to a caller allocated UINTN in which the
+ number of consecutive blocks starting with Lba is
+ returned. All blocks in this range have a size of
+ BlockSize
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to get block size
+ @retval Others Fail to get block size
+**/
+EFI_STATUS
+EfiFvbGetBlockSize (
+ IN UINTN Instance,
+ IN EFI_LBA Lba,
+ OUT UINTN *BlockSize,
+ OUT UINTN *NumOfBlocks
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->GetBlockSize (mFvbEntry[Instance].Fvb, Lba, BlockSize, NumOfBlocks);
+}
+
+/**
+ Erases and initializes a specified range of a firmware volume
+
+ @param Instance The FV instance to be erased
+ @param StartLba The starting logical block index to be erased
+ @param OffsetStartLba Offset into the starting block at which to
+ begin erasing
+ @param LastLba The last logical block index to be erased
+ @param OffsetLastLba Offset into the last block at which to end erasing
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to erase custom block range
+ @retval Others Fail to erase custom block range
+**/
+EFI_STATUS
+EfiFvbEraseCustomBlockRange (
+ IN UINTN Instance,
+ IN EFI_LBA StartLba,
+ IN UINTN OffsetStartLba,
+ IN EFI_LBA LastLba,
+ IN UINTN OffsetLastLba
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (!(mFvbEntry[Instance].FvbExtension)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if (!(mFvbEntry[Instance].FvbExtension->EraseFvbCustomBlock)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ return mFvbEntry[Instance].FvbExtension->EraseFvbCustomBlock (
+ mFvbEntry[Instance].FvbExtension,
+ StartLba,
+ OffsetStartLba,
+ LastLba,
+ OffsetLastLba
+ );
+}
diff --git a/MdeModulePkg/Library/EdkFvbServiceLib/X64/Fvb.c b/MdeModulePkg/Library/EdkFvbServiceLib/X64/Fvb.c new file mode 100644 index 0000000000..4ffc15c385 --- /dev/null +++ b/MdeModulePkg/Library/EdkFvbServiceLib/X64/Fvb.c @@ -0,0 +1,614 @@ +/**@file
+
+ Firmware Volume Block Protocol Runtime Abstraction
+
+ mFvbEntry is an array of Handle Fvb pairs. The Fvb Lib Instance matches the
+ index in the mFvbEntry array. This should be the same sequence as the FVB's
+ were described in the HOB. We have to remember the handle so we can tell if
+ the protocol has been reinstalled and it needs updateing.
+
+ If you are using any of these lib functions.you must first call FvbInitialize ().
+
+Copyright (c) 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.
+
+**/
+
+//
+// Include common header file for this module.
+//
+#include "CommonHeader.h"
+
+#include "Fvb.h"
+
+//
+// Event for Exit Boot Services Callback
+//
+STATIC EFI_EVENT mExitBootServicesEvent = NULL;
+
+//
+// Lib will ASSERT if more FVB devices than this are added to the system.
+//
+STATIC FVB_ENTRY *mFvbEntry;
+STATIC EFI_EVENT mFvbRegistration;
+STATIC BOOLEAN mEfiFvbInitialized = FALSE;
+STATIC UINTN mFvbCount;
+
+/**
+ Check whether an address is runtime memory or not.
+
+ @param Address The Address being checked.
+
+ @retval TRUE The address is runtime memory.
+ @retval FALSE The address is not runtime memory.
+**/
+BOOLEAN
+IsRuntimeMemory (
+ IN VOID *Address
+ )
+{
+ EFI_STATUS Status;
+ UINT8 TmpMemoryMap[1];
+ UINTN MapKey;
+ UINTN DescriptorSize;
+ UINT32 DescriptorVersion;
+ UINTN MemoryMapSize;
+ EFI_MEMORY_DESCRIPTOR *MemoryMap;
+ EFI_MEMORY_DESCRIPTOR *MemoryMapPtr;
+ BOOLEAN IsRuntime;
+ UINTN Index;
+
+ IsRuntime = FALSE;
+
+ //
+ // Get System MemoryMapSize
+ //
+ MemoryMapSize = 1;
+ Status = gBS->GetMemoryMap (
+ &MemoryMapSize,
+ (EFI_MEMORY_DESCRIPTOR *)TmpMemoryMap,
+ &MapKey,
+ &DescriptorSize,
+ &DescriptorVersion
+ );
+ ASSERT (Status == EFI_BUFFER_TOO_SMALL);
+ //
+ // Enlarge space here, because we will allocate pool now.
+ //
+ MemoryMapSize += EFI_PAGE_SIZE;
+ Status = gBS->AllocatePool (
+ EfiBootServicesData,
+ MemoryMapSize,
+ (VOID**)&MemoryMap
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Get System MemoryMap
+ //
+ Status = gBS->GetMemoryMap (
+ &MemoryMapSize,
+ MemoryMap,
+ &MapKey,
+ &DescriptorSize,
+ &DescriptorVersion
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ MemoryMapPtr = MemoryMap;
+ //
+ // Search the request Address
+ //
+ for (Index = 0; Index < (MemoryMapSize / DescriptorSize); Index++) {
+ if (((EFI_PHYSICAL_ADDRESS)(UINTN)Address >= MemoryMap->PhysicalStart) &&
+ ((EFI_PHYSICAL_ADDRESS)(UINTN)Address < MemoryMap->PhysicalStart
+ + LShiftU64 (MemoryMap->NumberOfPages, EFI_PAGE_SHIFT))) {
+ //
+ // Found it
+ //
+ if (MemoryMap->Attribute & EFI_MEMORY_RUNTIME) {
+ IsRuntime = TRUE;
+ }
+ break;
+ }
+ //
+ // Get next item
+ //
+ MemoryMap = (EFI_MEMORY_DESCRIPTOR *)((UINTN)MemoryMap + DescriptorSize);
+ }
+
+ //
+ // Done
+ //
+ gBS->FreePool (MemoryMapPtr);
+
+ return IsRuntime;
+}
+
+/**
+ Update mFvbEntry. Add new entry, or update existing entry if Fvb protocol is
+ reinstalled.
+
+ @param Event The Event that is being processed
+ @param Context Event Context
+
+**/
+STATIC
+VOID
+EFIAPI
+FvbNotificationEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+ UINTN BufferSize;
+ EFI_HANDLE Handle;
+ UINTN Index;
+ UINTN UpdateIndex;
+
+ while (TRUE) {
+ BufferSize = sizeof (Handle);
+ Status = gBS->LocateHandle (
+ ByRegisterNotify,
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ mFvbRegistration,
+ &BufferSize,
+ &Handle
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // Exit Path of While Loop....
+ //
+ break;
+ }
+
+ UpdateIndex = MAX_FVB_COUNT;
+ for (Index = 0; Index < mFvbCount; Index++) {
+ if (mFvbEntry[Index].Handle == Handle) {
+ //
+ // If the handle is already in the table just update the protocol
+ //
+ UpdateIndex = Index;
+ break;
+ }
+ }
+
+ if (UpdateIndex == MAX_FVB_COUNT) {
+ //
+ // Use the next free slot for a new entry
+ //
+ UpdateIndex = mFvbCount++;
+ //
+ // Check the UpdateIndex whether exceed the maximum value.
+ //
+ ASSERT (UpdateIndex < MAX_FVB_COUNT);
+ mFvbEntry[UpdateIndex].Handle = Handle;
+ }
+ //
+ // The array does not have enough entries
+ //
+ ASSERT (UpdateIndex < MAX_FVB_COUNT);
+
+ //
+ // Get the interface pointer and if it's ours, skip it
+ //
+ Status = gBS->HandleProtocol (
+ Handle,
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ (VOID **) &mFvbEntry[UpdateIndex].Fvb
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->HandleProtocol (
+ Handle,
+ &gEfiFvbExtensionProtocolGuid,
+ (VOID **) &mFvbEntry[UpdateIndex].FvbExtension
+ );
+ if (Status != EFI_SUCCESS) {
+ mFvbEntry[UpdateIndex].FvbExtension = NULL;
+ }
+
+ //
+ // Check the FVB can be accessed in RUNTIME, The FVBs in FVB handle list comes
+ // from two way:
+ // 1) Dxe Core. (FVB information is transferred from FV HOB).
+ // 2) FVB driver.
+ // The FVB produced Dxe core is used for discoverying DXE driver and dispatch. These
+ // FVBs can only be accessed in boot time.
+ // FVB driver will discovery all FV in FLASH and these FVBs can be accessed in runtime.
+ // The FVB itself produced by FVB driver is allocated in runtime memory. So we can
+ // determine the what FVB can be accessed in RUNTIME by judging whether FVB itself is allocated
+ // in RUNTIME memory.
+ //
+ mFvbEntry[UpdateIndex].IsRuntimeAccess = IsRuntimeMemory (mFvbEntry[UpdateIndex].Fvb);
+ }
+}
+
+/**
+ Convert all pointers in mFvbEntry after ExitBootServices.
+
+ @param Event The Event that is being processed
+ @param Context Event Context
+
+**/
+VOID
+EFIAPI
+FvbVirtualAddressChangeNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ UINTN Index;
+ if (mFvbEntry != NULL) {
+ for (Index = 0; Index < MAX_FVB_COUNT; Index++) {
+ if (!mFvbEntry[Index].IsRuntimeAccess) {
+ continue;
+ }
+
+ if (NULL != mFvbEntry[Index].Fvb) {
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->GetBlockSize);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->GetPhysicalAddress);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->GetVolumeAttributes);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->SetVolumeAttributes);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->Read);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->Write);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb->EraseBlocks);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].Fvb);
+ }
+
+ if (NULL != mFvbEntry[Index].FvbExtension) {
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].FvbExtension->EraseFvbCustomBlock);
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry[Index].FvbExtension);
+ }
+ }
+
+ EfiConvertPointer (0x0, (VOID **) &mFvbEntry);
+ }
+}
+
+/**
+ Library constructor function entry.
+
+ @param ImageHandle The handle of image who call this libary.
+ @param SystemTable The point of System Table.
+
+ @retval EFI_SUCESS Sucess construct this library.
+ @retval Others Fail to contruct this libary.
+**/
+EFI_STATUS
+EFIAPI
+FvbLibInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ UINTN Status;
+ mFvbCount = 0;
+
+ Status = gBS->AllocatePool (
+ EfiRuntimeServicesData,
+ (UINTN) sizeof (FVB_ENTRY) * MAX_FVB_COUNT,
+ (VOID *) &mFvbEntry
+ );
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ ZeroMem (mFvbEntry, sizeof (FVB_ENTRY) * MAX_FVB_COUNT);
+
+ EfiCreateProtocolNotifyEvent (
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ TPL_CALLBACK,
+ FvbNotificationEvent,
+ NULL,
+ &mFvbRegistration
+ );
+
+ //
+ // Register SetVirtualAddressMap () notify function
+ //
+ Status = gBS->CreateEvent (
+ EVT_SIGNAL_EXIT_BOOT_SERVICES,
+ TPL_NOTIFY,
+ FvbVirtualAddressChangeNotifyEvent,
+ NULL,
+ &mExitBootServicesEvent
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ mEfiFvbInitialized = TRUE;
+
+ return EFI_SUCCESS;
+}
+
+//
+// =============================================================================
+// The following functions wrap Fvb protocol in the Runtime Lib functions.
+// The Instance translates into Fvb instance. The Fvb order defined by HOBs and
+// thus the sequence of FVB protocol addition define Instance.
+//
+// EfiFvbInitialize () must be called before any of the following functions
+// must be called.
+// =============================================================================
+//
+
+/**
+ Reads specified number of bytes into a buffer from the specified block
+
+ @param Instance The FV instance to be read from.
+ @param Lba The logical block address to be read from
+ @param Offset Offset into the block at which to begin reading
+ @param NumBytes Pointer that on input contains the total size of
+ the buffer. On output, it contains the total number
+ of bytes read
+ @param Buffer Pointer to a caller allocated buffer that will be
+ used to hold the data read
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to Read block
+ @retval Others Fail to read block
+**/
+EFI_STATUS
+EfiFvbReadBlock (
+ IN UINTN Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN OUT UINTN *NumBytes,
+ IN UINT8 *Buffer
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->Read (mFvbEntry[Instance].Fvb, Lba, Offset, NumBytes, Buffer);
+}
+
+/**
+ Writes specified number of bytes from the input buffer to the block
+
+ @param Instance The FV instance to be written to
+ @param Lba The starting logical block index to write to
+ @param Offset Offset into the block at which to begin writing
+ @param NumBytes Pointer that on input contains the total size of
+ the buffer. On output, it contains the total number
+ of bytes actually written
+ @param Buffer Pointer to a caller allocated buffer that contains
+ the source for the write
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to write block
+ @retval Others Fail to write block
+**/
+EFI_STATUS
+EfiFvbWriteBlock (
+ IN UINTN Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN OUT UINTN *NumBytes,
+ IN UINT8 *Buffer
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->Write (mFvbEntry[Instance].Fvb, Lba, Offset, NumBytes, Buffer);
+}
+
+/**
+ Erases and initializes a firmware volume block
+
+ @param Instance The FV instance to be erased
+ @param Lba The logical block index to be erased
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to erase block
+ @retval Others Fail to erase block
+**/
+EFI_STATUS
+EfiFvbEraseBlock (
+ IN UINTN Instance,
+ IN EFI_LBA Lba
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->EraseBlocks (mFvbEntry[Instance].Fvb, Lba, -1);
+}
+
+/**
+ Retrieves attributes, insures positive polarity of attribute bits, returns
+ resulting attributes in output parameter
+
+ @param Instance The FV instance whose attributes is going to be returned
+ @param Attributes Output buffer which contains attributes
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to get Fv attribute
+ @retval Others Fail to get Fv attribute
+**/
+EFI_STATUS
+EfiFvbGetVolumeAttributes (
+ IN UINTN Instance,
+ OUT EFI_FVB_ATTRIBUTES *Attributes
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->GetVolumeAttributes (mFvbEntry[Instance].Fvb, Attributes);
+}
+
+/**
+ Modifies the current settings of the firmware volume according to the
+ input parameter, and returns the new setting of the volume
+
+ @param Instance The FV instance whose attributes is going to be
+ modified
+ @param Attributes On input, it is a pointer to EFI_FVB_ATTRIBUTES
+ containing the desired firmware volume settings.
+ On successful return, it contains the new settings
+ of the firmware volume
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to set Fv attribute
+ @retval Others Fail to set Fv attribute
+**/
+EFI_STATUS
+EfiFvbSetVolumeAttributes (
+ IN UINTN Instance,
+ IN EFI_FVB_ATTRIBUTES Attributes
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->SetVolumeAttributes (mFvbEntry[Instance].Fvb, &Attributes);
+}
+
+/**
+ Retrieves the physical address of a memory mapped FV
+
+ @param Instance The FV instance whose base address is going to be
+ returned
+ @param BaseAddress Pointer to a caller allocated EFI_PHYSICAL_ADDRESS
+ that on successful return, contains the base address
+ of the firmware volume.
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to get physical address
+ @retval Others Fail to get physical address
+**/
+EFI_STATUS
+EfiFvbGetPhysicalAddress (
+ IN UINTN Instance,
+ OUT EFI_PHYSICAL_ADDRESS *BaseAddress
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->GetPhysicalAddress (mFvbEntry[Instance].Fvb, BaseAddress);
+}
+
+/**
+ Retrieve the size of a logical block
+
+ @param Instance The FV instance whose block size is going to be
+ returned
+ @param Lba Indicates which block to return the size for.
+ @param BlockSize A pointer to a caller allocated UINTN in which
+ the size of the block is returned
+ @param NumOfBlocks a pointer to a caller allocated UINTN in which the
+ number of consecutive blocks starting with Lba is
+ returned. All blocks in this range have a size of
+ BlockSize
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to get block size
+ @retval Others Fail to get block size
+**/
+EFI_STATUS
+EfiFvbGetBlockSize (
+ IN UINTN Instance,
+ IN EFI_LBA Lba,
+ OUT UINTN *BlockSize,
+ OUT UINTN *NumOfBlocks
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ return mFvbEntry[Instance].Fvb->GetBlockSize (mFvbEntry[Instance].Fvb, Lba, BlockSize, NumOfBlocks);
+}
+
+/**
+ Erases and initializes a specified range of a firmware volume
+
+ @param Instance The FV instance to be erased
+ @param StartLba The starting logical block index to be erased
+ @param OffsetStartLba Offset into the starting block at which to
+ begin erasing
+ @param LastLba The last logical block index to be erased
+ @param OffsetLastLba Offset into the last block at which to end erasing
+
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+ @retval EFI_SUCESS Sucess to erase custom block range
+ @retval Others Fail to erase custom block range
+**/
+EFI_STATUS
+EfiFvbEraseCustomBlockRange (
+ IN UINTN Instance,
+ IN EFI_LBA StartLba,
+ IN UINTN OffsetStartLba,
+ IN EFI_LBA LastLba,
+ IN UINTN OffsetLastLba
+ )
+{
+ if (Instance >= mFvbCount) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (EfiAtRuntime() && !mFvbEntry[Instance].IsRuntimeAccess) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (!(mFvbEntry[Instance].FvbExtension)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if (!(mFvbEntry[Instance].FvbExtension->EraseFvbCustomBlock)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ return mFvbEntry[Instance].FvbExtension->EraseFvbCustomBlock (
+ mFvbEntry[Instance].FvbExtension,
+ StartLba,
+ OffsetStartLba,
+ LastLba,
+ OffsetLastLba
+ );
+}
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