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ArmPlatformPkg/BootMonFs: Added support for the NorFlash File System of the ARM Development Boards

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This is the filesystem created by the microcontroller on NOR Flash of the ARM Versatile
Express Development Board.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15126 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Olivier Martin 2014-01-16 00:06:13 +00:00 committed by oliviermartin
parent 33fc8b0fec
commit 94e0955d3e
17 changed files with 2582 additions and 10 deletions
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5
ArmPlatformPkg/ArmPlatformPkg.dec
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@ -1,6 +1,6 @@
#/** @file
#
# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
# Copyright (c) 2011-2014, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@ -86,6 +86,9 @@
# Size to reserve in the primary core stack for SEC Global Variables
gArmPlatformTokenSpaceGuid.PcdSecGlobalVariableSize|0x0|UINT32|0x00000031
# Boot Monitor FileSystem
gArmPlatformTokenSpaceGuid.PcdBootMonFsSupportedDevicePaths|L""|VOID*|0x0000003A
#
# ARM Primecells
#

6
ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA15-A7.fdf
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@ -1,5 +1,5 @@
#
# Copyright (c) 2012, ARM Limited. All rights reserved.
# Copyright (c) 2012-2014, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@ -120,6 +120,10 @@ READ_LOCK_STATUS = TRUE
INF FatBinPkg/EnhancedFatDxe/Fat.inf
INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
# Versatile Express FileSystem
INF ArmPlatformPkg/FileSystem/BootMonFs/BootMonFs.inf
# ACPI Support
INF MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
#

6
ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.fdf
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@ -1,6 +1,5 @@
# FLASH layout file for ARM VE.
#
# Copyright (c) 2011, ARM Limited. All rights reserved.
# Copyright (c) 2011-2014, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@ -189,6 +188,9 @@ READ_LOCK_STATUS = TRUE
INF FatBinPkg/EnhancedFatDxe/Fat.inf
INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
# Versatile Express FileSystem
INF ArmPlatformPkg/FileSystem/BootMonFs/BootMonFs.inf
#
# Multimedia Card Interface
#

6
ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-RTSM-A15.fdf
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@ -1,6 +1,5 @@
# FLASH layout file for ARM VE.
#
# Copyright (c) 2011, ARM Limited. All rights reserved.
# Copyright (c) 2011-2014, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@ -157,6 +156,9 @@ READ_LOCK_STATUS = TRUE
INF FatBinPkg/EnhancedFatDxe/Fat.inf
INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
# Versatile Express FileSystem
INF ArmPlatformPkg/FileSystem/BootMonFs/BootMonFs.inf
#
# Multimedia Card Interface
#

6
ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-RTSM-A15_MPCore.fdf
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@ -1,6 +1,5 @@
# FLASH layout file for ARM VE.
#
# Copyright (c) 2011, ARM Limited. All rights reserved.
# Copyright (c) 2011-2014, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@ -157,6 +156,9 @@ READ_LOCK_STATUS = TRUE
INF FatBinPkg/EnhancedFatDxe/Fat.inf
INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
# Versatile Express FileSystem
INF ArmPlatformPkg/FileSystem/BootMonFs/BootMonFs.inf
#
# Multimedia Card Interface
#

7
ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-RTSM-A9x4.fdf
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@ -1,5 +1,5 @@
#
# Copyright (c) 2011, ARM Limited. All rights reserved.
# Copyright (c) 2011-2014, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@ -148,6 +148,11 @@ READ_LOCK_STATUS = TRUE
#
INF ArmPkg/Filesystem/SemihostFs/SemihostFs.inf
#
# Versatile Express FileSystem
#
INF ArmPlatformPkg/FileSystem/BootMonFs/BootMonFs.inf
#
# FAT filesystem + GPT/MBR partitioning
#

12
ArmPlatformPkg/ArmVExpressPkg/ArmVExpress.dsc.inc
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@ -1,5 +1,5 @@
#
# Copyright (c) 2011-2012, ARM Limited. All rights reserved.
# Copyright (c) 2011-2014, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@ -327,6 +327,13 @@
# ARM PrimeCell
#
#
# FileSystem
#
# List of Device Paths that support BootMonFs
gArmPlatformTokenSpaceGuid.PcdBootMonFsSupportedDevicePaths|L"VenHw(1F15DA3C-37FF-4070-B471-BB4AF12A724A)"
#
# ARM OS Loader
#
@ -342,3 +349,6 @@
gArmPlatformTokenSpaceGuid.PcdDefaultConInPaths|L"VenHw(D3987D4B-971A-435F-8CAF-4967EB627241)/Uart(38400,8,N,1)/VenPcAnsi()"
gArmPlatformTokenSpaceGuid.PcdPlatformBootTimeOut|10
[Components.common]
# Versatile Express FileSystem
ArmPlatformPkg/FileSystem/BootMonFs/BootMonFs.inf

59
ArmPlatformPkg/FileSystem/BootMonFs/BootMonFs.inf Normal file
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@ -0,0 +1,59 @@
#/** @file
# Support for ARM Boot Monitor File System
#
# Copyright (c) 2012-2014, ARM Ltd. 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.
#
#**/
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = BootMonFs
FILE_GUID = 7abbc454-f737-4322-931c-b1bb62a01d6f
MODULE_TYPE = UEFI_DRIVER
VERSION_STRING = 1.0
ENTRY_POINT = BootMonFsEntryPoint
[Sources]
BootMonFsEntryPoint.c
BootMonFsOpenClose.c
BootMonFsDir.c
BootMonFsImages.c
BootMonFsReadWrite.c
BootMonFsUnsupported.c
[Packages]
ArmPlatformPkg/ArmPlatformPkg.dec
MdePkg/MdePkg.dec
[LibraryClasses]
BaseLib
DevicePathLib
MemoryAllocationLib
PrintLib
UefiDriverEntryPoint
UefiLib
[Guids]
gEfiFileSystemInfoGuid
gEfiFileInfoGuid
gEfiFileSystemVolumeLabelInfoIdGuid
[Pcd]
gArmPlatformTokenSpaceGuid.PcdBootMonFsSupportedDevicePaths
[Protocols]
gEfiDiskIoProtocolGuid
gEfiBlockIoProtocolGuid
gEfiSimpleFileSystemProtocolGuid
gEfiDevicePathProtocolGuid
gEfiDevicePathFromTextProtocolGuid

216
ArmPlatformPkg/FileSystem/BootMonFs/BootMonFsApi.h Normal file
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@ -0,0 +1,216 @@
/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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.
*
**/
#ifndef __BOOTMON_FS_API_H
#define __BOOTMON_FS_API_H
#include <Protocol/SimpleFileSystem.h>
EFI_STATUS
BootMonFsDiscoverNextImage (
IN BOOTMON_FS_INSTANCE *Flash,
IN EFI_LBA *LbaStart,
OUT HW_IMAGE_DESCRIPTION *Image
);
EFI_STATUS
BootMonFsInitialize (
IN BOOTMON_FS_INSTANCE *Instance
);
UINT32
BootMonFsChecksum (
IN VOID *Data,
IN UINT32 Size
);
EFI_STATUS
BootMonFsComputeFooterChecksum (
IN OUT HW_IMAGE_DESCRIPTION *Footer
);
EFIAPI
EFI_STATUS
OpenBootMonFsOpenVolume (
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **Root
);
UINT32
BootMonFsGetImageLength (
IN BOOTMON_FS_FILE *File
);
UINTN
BootMonFsGetPhysicalSize (
IN BOOTMON_FS_FILE* File
);
EFI_STATUS
BootMonFsCreateFile (
IN BOOTMON_FS_INSTANCE *Instance,
OUT BOOTMON_FS_FILE **File
);
EFIAPI
EFI_STATUS
BootMonFsGetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
EFIAPI
EFI_STATUS
BootMonFsReadDirectory (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
EFIAPI
EFI_STATUS
BootMonFsFlushDirectory (
IN EFI_FILE_PROTOCOL *This
);
EFIAPI
EFI_STATUS
BootMonFsFlushFile (
IN EFI_FILE_PROTOCOL *This
);
EFIAPI
EFI_STATUS
BootMonFsCloseFile (
IN EFI_FILE_PROTOCOL *This
);
EFIAPI
EFI_STATUS
BootMonFsOpenFile (
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
);
EFIAPI
EFI_STATUS
BootMonFsReadFile (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
EFIAPI
EFI_STATUS
BootMonFsSetDirPosition (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
);
EFIAPI
EFI_STATUS
BootMonFsGetPosition (
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
);
EFIAPI
EFI_STATUS
BootMonFsWriteFile (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
);
EFIAPI
EFI_STATUS
BootMonFsDeleteFail (
IN EFI_FILE_PROTOCOL *This
);
EFIAPI
EFI_STATUS
BootMonFsDelete (
IN EFI_FILE_PROTOCOL *This
);
EFIAPI
EFI_STATUS
BootMonFsSetPosition (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
);
EFIAPI
EFI_STATUS
BootMonFsGetPosition(
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
);
//
// UNSUPPORTED OPERATIONS
//
EFIAPI
EFI_STATUS
BootMonFsGetPositionUnsupported (
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
);
EFIAPI
EFI_STATUS
BootMonFsSetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
);
//
// Directory API
//
EFI_STATUS
BootMonFsOpenDirectory (
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN BOOTMON_FS_INSTANCE *Volume
);
//
// Internal API
//
EFI_STATUS
BootMonGetFileFromAsciiFileName (
IN BOOTMON_FS_INSTANCE *Instance,
IN CHAR8* AsciiFileName,
OUT BOOTMON_FS_FILE **File
);
EFI_STATUS
BootMonGetFileFromPosition (
IN BOOTMON_FS_INSTANCE *Instance,
IN UINTN Position,
OUT BOOTMON_FS_FILE **File
);
#endif

602
ArmPlatformPkg/FileSystem/BootMonFs/BootMonFsDir.c Normal file
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@ -0,0 +1,602 @@
/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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 "BootMonFsInternal.h"
EFIAPI
EFI_STATUS
OpenBootMonFsOpenVolume (
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **Root
)
{
BOOTMON_FS_INSTANCE *Instance;
Instance = BOOTMON_FS_FROM_FS_THIS (This);
if (Instance == NULL) {
return EFI_DEVICE_ERROR;
}
*Root = &Instance->RootFile->File;
return EFI_SUCCESS;
}
UINT32
BootMonFsGetImageLength (
IN BOOTMON_FS_FILE *File
)
{
UINT32 Index;
UINT32 FileSize;
LIST_ENTRY *RegionToFlushLink;
BOOTMON_FS_FILE_REGION *Region;
FileSize = 0;
// Look at all Flash areas to determine file size
for (Index = 0; Index < HW_IMAGE_DESCRIPTION_REGION_MAX; Index++) {
FileSize += File->HwDescription.Region[Index].Size;
}
// Add the regions that have not been flushed yet
for (RegionToFlushLink = GetFirstNode (&File->RegionToFlushLink);
!IsNull (&File->RegionToFlushLink, RegionToFlushLink);
RegionToFlushLink = GetNextNode (&File->RegionToFlushLink, RegionToFlushLink)
)
{
Region = (BOOTMON_FS_FILE_REGION*)RegionToFlushLink;
if (Region->Offset + Region->Size > FileSize) {
FileSize += Region->Offset + Region->Size;
}
}
return FileSize;
}
UINTN
BootMonFsGetPhysicalSize (
IN BOOTMON_FS_FILE* File
)
{
// Return 0 for files that haven't yet been flushed to media
if (File->HwDescription.RegionCount == 0) {
return 0;
}
return ((File->HwDescription.BlockEnd - File->HwDescription.BlockStart) + 1 )
* File->Instance->Media->BlockSize;
}
EFIAPI
EFI_STATUS
BootMonFsSetDirPosition (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
)
{
BOOTMON_FS_FILE *File;
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (File == NULL) {
return EFI_INVALID_PARAMETER;
}
// UEFI Spec section 12.5:
// "The seek request for nonzero is not valid on open directories."
if (Position != 0) {
return EFI_UNSUPPORTED;
}
File->Position = Position;
return EFI_SUCCESS;
}
EFI_STATUS
BootMonFsOpenDirectory (
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN BOOTMON_FS_INSTANCE *Volume
)
{
ASSERT(0);
return EFI_UNSUPPORTED;
}
EFI_STATUS
GetFileSystemVolumeLabelInfo (
IN BOOTMON_FS_INSTANCE *Instance,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
UINTN Size;
EFI_FILE_SYSTEM_VOLUME_LABEL *Label;
EFI_STATUS Status;
Label = Buffer;
// Value returned by StrSize includes null terminator.
Size = SIZE_OF_EFI_FILE_SYSTEM_VOLUME_LABEL
+ StrSize (Instance->FsInfo.VolumeLabel);
if (*BufferSize >= Size) {
CopyMem (&Label->VolumeLabel, &Instance->FsInfo.VolumeLabel, Size);
Status = EFI_SUCCESS;
} else {
Status = EFI_BUFFER_TOO_SMALL;
}
*BufferSize = Size;
return Status;
}
// Helper function that calculates a rough "free space" by:
// - Taking the media size
// - Subtracting the sum of all file sizes
// - Subtracting the block size times the number of files
// (To account for the blocks containing the HW_IMAGE_INFO
STATIC
UINT64
ComputeFreeSpace (
IN BOOTMON_FS_INSTANCE *Instance
)
{
LIST_ENTRY *FileLink;
UINT64 FileSizeSum;
UINT64 MediaSize;
UINTN NumFiles;
EFI_BLOCK_IO_MEDIA *Media;
BOOTMON_FS_FILE *File;
Media = Instance->BlockIo->Media;
MediaSize = Media->BlockSize * (Media->LastBlock + 1);
NumFiles = 0;
FileSizeSum = 0;
for (FileLink = GetFirstNode (&Instance->RootFile->Link);
!IsNull (&Instance->RootFile->Link, FileLink);
FileLink = GetNextNode (&Instance->RootFile->Link, FileLink)
)
{
File = BOOTMON_FS_FILE_FROM_LINK_THIS (FileLink);
FileSizeSum += BootMonFsGetImageLength (File);
NumFiles++;
}
return MediaSize - (FileSizeSum + (Media->BlockSize + NumFiles));
}
EFI_STATUS
GetFilesystemInfo (
IN BOOTMON_FS_INSTANCE *Instance,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status;
if (*BufferSize >= Instance->FsInfo.Size) {
Instance->FsInfo.FreeSpace = ComputeFreeSpace (Instance);
CopyMem (Buffer, &Instance->FsInfo, Instance->FsInfo.Size);
Status = EFI_SUCCESS;
} else {
Status = EFI_BUFFER_TOO_SMALL;
}
*BufferSize = Instance->FsInfo.Size;
return Status;
}
EFI_STATUS
GetFileInfo (
IN BOOTMON_FS_INSTANCE *Instance,
IN BOOTMON_FS_FILE *File,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_FILE_INFO *Info;
UINTN ResultSize;
UINTN NameSize;
UINTN Index;
if (File == Instance->RootFile) {
NameSize = 0;
ResultSize = SIZE_OF_EFI_FILE_INFO + sizeof (CHAR16);
} else {
NameSize = AsciiStrLen (File->HwDescription.Footer.Filename) + 1;
ResultSize = SIZE_OF_EFI_FILE_INFO + (NameSize * sizeof (CHAR16));
}
if (*BufferSize < ResultSize) {
*BufferSize = ResultSize;
return EFI_BUFFER_TOO_SMALL;
}
Info = Buffer;
// Zero out the structure
ZeroMem (Info, ResultSize);
// Fill in the structure
Info->Size = ResultSize;
if (File == Instance->RootFile) {
Info->Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;
Info->FileName[0] = L'\0';
} else {
Info->FileSize = BootMonFsGetImageLength (File);
Info->PhysicalSize = BootMonFsGetPhysicalSize (File);
for (Index = 0; Index < NameSize; Index++) {
Info->FileName[Index] = File->HwDescription.Footer.Filename[Index];
}
}
*BufferSize = ResultSize;
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
SetFileName (
IN BOOTMON_FS_FILE *File,
IN CHAR16 *FileNameUnicode
)
{
CHAR8 *FileNameAscii;
UINT16 SavedChar;
UINTN FileNameSize;
BOOTMON_FS_FILE *SameFile;
EFI_STATUS Status;
// EFI Shell inserts '\' in front of the filename that must be stripped
if (FileNameUnicode[0] == L'\\') {
FileNameUnicode++;
}
//
// Convert Unicode into Ascii
//
SavedChar = L'\0';
FileNameSize = StrLen (FileNameUnicode) + 1;
FileNameAscii = AllocatePool (FileNameSize * sizeof (CHAR8));
if (FileNameAscii == NULL) {
return EFI_OUT_OF_RESOURCES;
}
// If Unicode string is too long then truncate it.
if (FileNameSize > MAX_NAME_LENGTH) {
SavedChar = FileNameUnicode[MAX_NAME_LENGTH - 1];
FileNameUnicode[MAX_NAME_LENGTH - 1] = L'\0';
}
UnicodeStrToAsciiStr (FileNameUnicode, FileNameAscii);
// If the unicode string was truncated then restore its original content.
if (SavedChar != L'\0') {
FileNameUnicode[MAX_NAME_LENGTH - 1] = SavedChar;
}
// If we're changing the file name
if (AsciiStrCmp (FileNameAscii, File->HwDescription.Footer.Filename)) {
// Check a file with that filename doesn't already exist
if (BootMonGetFileFromAsciiFileName (
File->Instance,
File->HwDescription.Footer.Filename,
&SameFile) != EFI_NOT_FOUND) {
Status = EFI_ACCESS_DENIED;
} else {
AsciiStrCpy (FileNameAscii, File->HwDescription.Footer.Filename);
Status = EFI_SUCCESS;
}
} else {
// No change to filename
Status = EFI_SUCCESS;
}
FreePool (FileNameAscii);
return Status;
}
// Set the file's size (NB "size", not "physical size"). If the change amounts
// to an increase, simply do a write followed by a flush.
// (This is a helper function for SetFileInfo.)
STATIC
EFI_STATUS
SetFileSize (
IN BOOTMON_FS_INSTANCE *Instance,
IN BOOTMON_FS_FILE *BootMonFsFile,
IN UINTN Size
)
{
UINT64 StoredPosition;
EFI_STATUS Status;
EFI_FILE_PROTOCOL *File;
CHAR8 Buffer;
UINTN BufferSize;
Buffer = 0;
BufferSize = sizeof (Buffer);
File = &BootMonFsFile->File;
if (!(BootMonFsFile->OpenMode & EFI_FILE_MODE_WRITE)) {
return EFI_ACCESS_DENIED;
}
if (Size <= BootMonFsFile->HwDescription.Region[0].Size) {
BootMonFsFile->HwDescription.Region[0].Size = Size;
} else {
// Increasing a file's size is potentially complicated as it may require
// moving the image description on media. The simplest way to do it is to
// seek past the end of the file (which is valid in UEFI) and perform a
// Write.
// Save position
Status = File->GetPosition (File, &StoredPosition);
if (EFI_ERROR (Status)) {
return Status;
}
Status = File->SetPosition (File, Size - 1);
if (EFI_ERROR (Status)) {
return Status;
}
Status = File->Write (File, &BufferSize, &Buffer);
if (EFI_ERROR (Status)) {
return Status;
}
// Restore saved position
Status = File->SetPosition (File, Size - 1);
if (EFI_ERROR (Status)) {
return Status;
}
Status = File->Flush (File);
if (EFI_ERROR (Status)) {
return Status;
}
}
return EFI_SUCCESS;
}
EFI_STATUS
SetFileInfo (
IN BOOTMON_FS_INSTANCE *Instance,
IN BOOTMON_FS_FILE *File,
IN UINTN BufferSize,
IN EFI_FILE_INFO *Info
)
{
EFI_STATUS Status;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
UINT8 *DataBuffer;
UINTN BlockSize;
Status = EFI_SUCCESS;
BlockIo = Instance->BlockIo;
// Note that a call to this function on a file opened read-only is only
// invalid if it actually changes fields, so we don't immediately fail if the
// OpenMode is wrong.
// Also note that the only fields supported are filename and size, others are
// ignored.
if (File != Instance->RootFile) {
if (!(File->OpenMode & EFI_FILE_MODE_WRITE)) {
return EFI_ACCESS_DENIED;
}
SetFileName (File, Info->FileName);
if (EFI_ERROR (Status)) {
return Status;
}
// Update file size
Status = SetFileSize (Instance, File, Info->FileSize);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Update the last block
//
BlockSize = BlockIo->Media->BlockSize;
DataBuffer = AllocatePool (BlockSize);
if (DataBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = BlockIo->ReadBlocks (BlockIo, Instance->Media->MediaId,
File->HwDescription.BlockEnd, BlockSize, DataBuffer);
if (EFI_ERROR (Status)) {
FreePool (DataBuffer);
return Status;
}
CopyMem (DataBuffer + BlockSize - sizeof (File->HwDescription), &File->HwDescription, sizeof (File->HwDescription));
Status = BlockIo->WriteBlocks (BlockIo, Instance->Media->MediaId,
File->HwDescription.BlockEnd, BlockSize, DataBuffer);
FreePool (DataBuffer);
}
return Status;
}
EFIAPI
EFI_STATUS
BootMonFsGetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status;
BOOTMON_FS_FILE *File;
BOOTMON_FS_INSTANCE *Instance;
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (File == NULL) {
return EFI_DEVICE_ERROR;
}
Instance = File->Instance;
// If the instance has not been initialized yet then do it ...
if (!Instance->Initialized) {
Status = BootMonFsInitialize (Instance);
} else {
Status = EFI_SUCCESS;
}
if (!EFI_ERROR (Status)) {
if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)
!= 0) {
Status = GetFileSystemVolumeLabelInfo (Instance, BufferSize, Buffer);
} else if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid) != 0) {
Status = GetFilesystemInfo (Instance, BufferSize, Buffer);
} else if (CompareGuid (InformationType, &gEfiFileInfoGuid) != 0) {
Status = GetFileInfo (Instance, File, BufferSize, Buffer);
} else {
Status = EFI_UNSUPPORTED;
}
}
return Status;
}
EFIAPI
EFI_STATUS
BootMonFsSetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
EFI_STATUS Status;
BOOTMON_FS_FILE *File;
BOOTMON_FS_INSTANCE *Instance;
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (File == NULL) {
return EFI_DEVICE_ERROR;
}
Instance = File->Instance;
if (CompareGuid (InformationType, &gEfiFileInfoGuid) != 0) {
Status = SetFileInfo (Instance, File, BufferSize, (EFI_FILE_INFO *) Buffer);
} else {
// The only writable field in the other two information types
// (i.e. EFI_FILE_SYSTEM_INFO and EFI_FILE_SYSTEM_VOLUME_LABEL) is the
// filesystem volume label. This can be retrieved with GetInfo, but it is
// hard-coded into this driver, not stored on media.
Status = EFI_UNSUPPORTED;
}
return Status;
}
EFIAPI
EFI_STATUS
BootMonFsReadDirectory (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
BOOTMON_FS_INSTANCE *Instance;
BOOTMON_FS_FILE *RootFile;
BOOTMON_FS_FILE *File;
EFI_FILE_INFO *Info;
UINTN NameSize;
UINTN ResultSize;
EFI_STATUS Status;
UINTN Index;
RootFile = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (RootFile == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = RootFile->Instance;
Status = BootMonGetFileFromPosition (Instance, RootFile->Position, &File);
if (EFI_ERROR (Status)) {
// No more file
*BufferSize = 0;
return EFI_SUCCESS;
}
NameSize = AsciiStrLen (File->HwDescription.Footer.Filename) + 1;
ResultSize = SIZE_OF_EFI_FILE_INFO + (NameSize * sizeof (CHAR16));
if (*BufferSize < ResultSize) {
*BufferSize = ResultSize;
return EFI_BUFFER_TOO_SMALL;
}
// Zero out the structure
Info = Buffer;
ZeroMem (Info, ResultSize);
// Fill in the structure
Info->Size = ResultSize;
Info->FileSize = BootMonFsGetImageLength (File);
Info->PhysicalSize = BootMonFsGetPhysicalSize (File);
for (Index = 0; Index < NameSize; Index++) {
Info->FileName[Index] = File->HwDescription.Footer.Filename[Index];
}
*BufferSize = ResultSize;
RootFile->Position++;
return EFI_SUCCESS;
}
EFIAPI
EFI_STATUS
BootMonFsFlushDirectory (
IN EFI_FILE_PROTOCOL *This
)
{
BOOTMON_FS_FILE *RootFile;
LIST_ENTRY *ListFiles;
LIST_ENTRY *Link;
BOOTMON_FS_FILE *File;
RootFile = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (RootFile == NULL) {
return EFI_INVALID_PARAMETER;
}
ListFiles = &RootFile->Link;
if (IsListEmpty (ListFiles)) {
return EFI_SUCCESS;
}
//
// Flush all the files that need to be flushed
//
// Go through all the list of files to flush them
for (Link = GetFirstNode (ListFiles);
!IsNull (ListFiles, Link);
Link = GetNextNode (ListFiles, Link)
)
{
File = BOOTMON_FS_FILE_FROM_LINK_THIS (Link);
File->File.Flush (&File->File);
}
return EFI_SUCCESS;
}

479
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/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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 <Library/BaseMemoryLib.h>
#include <Library/DevicePathLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PrintLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/DevicePathFromText.h>
#include <Protocol/DriverBinding.h>
#include "BootMonFsInternal.h"
EFI_DEVICE_PATH* mBootMonFsSupportedDevicePaths;
EFI_HANDLE mImageHandle;
LIST_ENTRY mInstances;
EFI_FILE_PROTOCOL mBootMonFsRootTemplate = {
EFI_FILE_PROTOCOL_REVISION,
BootMonFsOpenFile,
BootMonFsCloseFile,
BootMonFsDeleteFail,
BootMonFsReadDirectory,
BootMonFsWriteFile,
BootMonFsGetPositionUnsupported, // UEFI Spec: GetPosition not valid on dirs
BootMonFsSetDirPosition,
BootMonFsGetInfo,
BootMonFsSetInfo,
BootMonFsFlushDirectory
};
EFI_FILE_PROTOCOL mBootMonFsFileTemplate = {
EFI_FILE_PROTOCOL_REVISION,
BootMonFsOpenFile,
BootMonFsCloseFile,
BootMonFsDelete,
BootMonFsReadFile,
BootMonFsWriteFile,
BootMonFsGetPosition,
BootMonFsSetPosition,
BootMonFsGetInfo,
BootMonFsSetInfo,
BootMonFsFlushFile
};
EFI_STATUS
BootMonGetFileFromAsciiFileName (
IN BOOTMON_FS_INSTANCE *Instance,
IN CHAR8* AsciiFileName,
OUT BOOTMON_FS_FILE **File
)
{
LIST_ENTRY *Entry;
BOOTMON_FS_FILE *FileEntry;
// Remove the leading '\\'
if (*AsciiFileName == '\\') {
AsciiFileName++;
}
// Go through all the files in the list and return the file handle
for (Entry = GetFirstNode (&Instance->RootFile->Link);
!IsNull (&Instance->RootFile->Link, Entry);
Entry = GetNextNode (&Instance->RootFile->Link, Entry)
)
{
FileEntry = BOOTMON_FS_FILE_FROM_LINK_THIS (Entry);
if (AsciiStrCmp (FileEntry->HwDescription.Footer.Filename, AsciiFileName) == 0) {
*File = FileEntry;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
EFI_STATUS
BootMonGetFileFromPosition (
IN BOOTMON_FS_INSTANCE *Instance,
IN UINTN Position,
OUT BOOTMON_FS_FILE **File
)
{
LIST_ENTRY *Entry;
BOOTMON_FS_FILE *FileEntry;
// Go through all the files in the list and return the file handle
for (Entry = GetFirstNode (&Instance->RootFile->Link);
!IsNull (&Instance->RootFile->Link, Entry) && (&Instance->RootFile->Link != Entry);
Entry = GetNextNode (&Instance->RootFile->Link, Entry)
)
{
if (Position == 0) {
FileEntry = BOOTMON_FS_FILE_FROM_LINK_THIS (Entry);
*File = FileEntry;
return EFI_SUCCESS;
}
Position--;
}
return EFI_NOT_FOUND;
}
EFI_STATUS
BootMonFsCreateFile (
IN BOOTMON_FS_INSTANCE *Instance,
OUT BOOTMON_FS_FILE **File
)
{
BOOTMON_FS_FILE *NewFile;
NewFile = (BOOTMON_FS_FILE*)AllocateZeroPool (sizeof (BOOTMON_FS_FILE));
if (NewFile == NULL) {
return EFI_OUT_OF_RESOURCES;
}
NewFile->Signature = BOOTMON_FS_FILE_SIGNATURE;
InitializeListHead (&NewFile->Link);
InitializeListHead (&NewFile->RegionToFlushLink);
NewFile->Instance = Instance;
// If the created file is the root file then create a directory EFI_FILE_PROTOCOL
if (Instance->RootFile == *File) {
CopyMem (&NewFile->File, &mBootMonFsRootTemplate, sizeof (mBootMonFsRootTemplate));
} else {
CopyMem (&NewFile->File, &mBootMonFsFileTemplate, sizeof (mBootMonFsFileTemplate));
}
*File = NewFile;
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
SupportedDevicePathsInit (
VOID
)
{
EFI_STATUS Status;
CHAR16* DevicePathListStr;
CHAR16* DevicePathStr;
CHAR16* NextDevicePathStr;
EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *EfiDevicePathFromTextProtocol;
EFI_DEVICE_PATH_PROTOCOL *Instance;
Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);
ASSERT_EFI_ERROR (Status);
// Initialize Variable
DevicePathListStr = (CHAR16*)PcdGetPtr (PcdBootMonFsSupportedDevicePaths);
mBootMonFsSupportedDevicePaths = NULL;
// Extract the Device Path instances from the multi-device path string
while ((DevicePathListStr != NULL) && (DevicePathListStr[0] != L'\0')) {
NextDevicePathStr = StrStr (DevicePathListStr, L";");
if (NextDevicePathStr == NULL) {
DevicePathStr = DevicePathListStr;
DevicePathListStr = NULL;
} else {
DevicePathStr = (CHAR16*)AllocateCopyPool ((NextDevicePathStr - DevicePathListStr + 1) * sizeof (CHAR16), DevicePathListStr);
if (DevicePathStr == NULL) {
return EFI_OUT_OF_RESOURCES;
}
*(DevicePathStr + (NextDevicePathStr - DevicePathListStr)) = L'\0';
DevicePathListStr = NextDevicePathStr;
if (DevicePathListStr[0] == L';') {
DevicePathListStr++;
}
}
Instance = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath (DevicePathStr);
ASSERT (Instance != NULL);
mBootMonFsSupportedDevicePaths = AppendDevicePathInstance (mBootMonFsSupportedDevicePaths, Instance);
if (NextDevicePathStr != NULL) {
FreePool (DevicePathStr);
}
FreePool (Instance);
}
if (mBootMonFsSupportedDevicePaths == NULL) {
return EFI_UNSUPPORTED;
} else {
return EFI_SUCCESS;
}
}
EFI_STATUS
EFIAPI
BootMonFsDriverSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath OPTIONAL
)
{
EFI_DISK_IO_PROTOCOL *DiskIo;
EFI_DEVICE_PATH_PROTOCOL *DevicePathProtocol;
EFI_DEVICE_PATH_PROTOCOL *SupportedDevicePath;
EFI_DEVICE_PATH_PROTOCOL *SupportedDevicePaths;
EFI_STATUS Status;
UINTN Size1;
UINTN Size2;
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
(VOID **) &DiskIo,
mImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Close the I/O Abstraction(s) used to perform the supported test
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
mImageHandle,
ControllerHandle
);
// Check that BlockIo protocol instance exists
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiBlockIoProtocolGuid,
NULL,
mImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
// Check if a DevicePath is attached to the handle
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
(VOID **)&DevicePathProtocol,
mImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
// Check if the Device Path is the one which contains the Boot Monitor File System
Size1 = GetDevicePathSize (DevicePathProtocol);
// Go through the list of Device Path Instances
Status = EFI_UNSUPPORTED;
SupportedDevicePaths = mBootMonFsSupportedDevicePaths;
while (SupportedDevicePaths != NULL) {
SupportedDevicePath = GetNextDevicePathInstance (&SupportedDevicePaths, &Size2);
if ((Size1 == Size2) && (CompareMem (DevicePathProtocol, SupportedDevicePath, Size1) == 0)) {
// The Device Path is supported
Status = EFI_SUCCESS;
break;
}
}
gBS->CloseProtocol (ControllerHandle, &gEfiDevicePathProtocolGuid, mImageHandle, ControllerHandle);
return Status;
}
EFI_STATUS
EFIAPI
BootMonFsDriverStart (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath OPTIONAL
)
{
BOOTMON_FS_INSTANCE *Instance;
EFI_STATUS Status;
UINTN VolumeNameSize;
Instance = AllocateZeroPool (sizeof (BOOTMON_FS_INSTANCE));
if (Instance == NULL) {
return EFI_OUT_OF_RESOURCES;
}
// Initialize the BlockIo of the Instance
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiBlockIoProtocolGuid,
(VOID **)&(Instance->BlockIo),
mImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
FreePool (Instance);
return Status;
}
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
(VOID **)&(Instance->DiskIo),
mImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
FreePool (Instance);
return Status;
}
//
// Initialize the attributes of the Instance
//
Instance->Signature = BOOTMON_FS_SIGNATURE;
Instance->ControllerHandle = ControllerHandle;
Instance->Media = Instance->BlockIo->Media;
Instance->Binding = DriverBinding;
// Initialize the Simple File System Protocol
Instance->Fs.Revision = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
Instance->Fs.OpenVolume = OpenBootMonFsOpenVolume;
// Volume name + L' ' + '2' digit number
VolumeNameSize = StrSize (BOOTMON_FS_VOLUME_LABEL) + (3 * sizeof (CHAR16));
// Initialize FileSystem Information
Instance->FsInfo.Size = SIZE_OF_EFI_FILE_SYSTEM_INFO + VolumeNameSize;
Instance->FsInfo.BlockSize = Instance->Media->BlockSize;
Instance->FsInfo.ReadOnly = FALSE;
Instance->FsInfo.VolumeSize =
Instance->Media->BlockSize * (Instance->Media->LastBlock - Instance->Media->LowestAlignedLba);
CopyMem (Instance->FsInfo.VolumeLabel, BOOTMON_FS_VOLUME_LABEL, StrSize (BOOTMON_FS_VOLUME_LABEL));
// Initialize the root file
Status = BootMonFsCreateFile (Instance, &Instance->RootFile);
if (EFI_ERROR (Status)) {
FreePool (Instance);
return Status;
}
// Initialize the DevicePath of the Instance
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
(VOID **)&(Instance->DevicePath),
mImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
FreePool (Instance);
return Status;
}
//
// Install the Simple File System Protocol
//
Status = gBS->InstallMultipleProtocolInterfaces (
&ControllerHandle,
&gEfiSimpleFileSystemProtocolGuid, &Instance->Fs,
NULL
);
InsertTailList (&mInstances, &Instance->Link);
return Status;
}
EFI_STATUS
EFIAPI
BootMonFsDriverStop (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
)
{
BOOTMON_FS_INSTANCE *Instance;
LIST_ENTRY *Link;
EFI_STATUS Status;
BOOLEAN InstanceFound;
// Find instance from ControllerHandle.
Instance = NULL;
InstanceFound = FALSE;
// For each instance in mInstances:
for (Link = GetFirstNode (&mInstances); !IsNull (&mInstances, Link); Link = GetNextNode (&mInstances, Link)) {
Instance = BOOTMON_FS_FROM_LINK (Link);
if (Instance->ControllerHandle == ControllerHandle) {
InstanceFound = TRUE;
break;
}
}
ASSERT (InstanceFound == TRUE);
gBS->CloseProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
DriverBinding->ImageHandle,
ControllerHandle);
gBS->CloseProtocol (
ControllerHandle,
&gEfiDiskIoProtocolGuid,
DriverBinding->ImageHandle,
ControllerHandle);
gBS->CloseProtocol (
ControllerHandle,
&gEfiBlockIoProtocolGuid,
DriverBinding->ImageHandle,
ControllerHandle);
Status = gBS->UninstallMultipleProtocolInterfaces (
&ControllerHandle,
&gEfiSimpleFileSystemProtocolGuid, &Instance->Fs,
NULL);
return Status;
}
//
// Simple Network Protocol Driver Global Variables
//
EFI_DRIVER_BINDING_PROTOCOL mBootMonFsDriverBinding = {
BootMonFsDriverSupported,
BootMonFsDriverStart,
BootMonFsDriverStop,
0xa,
NULL,
NULL
};
EFI_STATUS
EFIAPI
BootMonFsEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
mImageHandle = ImageHandle;
InitializeListHead (&mInstances);
// Initialize the list of Device Paths that could support BootMonFs
Status = SupportedDevicePathsInit ();
if (!EFI_ERROR (Status)) {
Status = gBS->InstallMultipleProtocolInterfaces (
&ImageHandle,
&gEfiDriverBindingProtocolGuid, &mBootMonFsDriverBinding,
NULL
);
ASSERT_EFI_ERROR (Status);
} else {
DEBUG((EFI_D_ERROR,"Warning: No Device Paths supporting BootMonFs have been defined in the PCD.\n"));
}
return Status;
}

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/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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.
*
**/
#ifndef __BOOTMON_FS_HW_H__
#define __BOOTMON_FS_HW_H__
#define MAX_NAME_LENGTH 32
#define HW_IMAGE_FOOTER_SIGNATURE_1 0x464C5348
#define HW_IMAGE_FOOTER_SIGNATURE_2 0x464F4F54
#define HW_IMAGE_FOOTER_VERSION 1
#define HW_IMAGE_FOOTER_OFFSET 92
typedef struct {
CHAR8 Filename[MAX_NAME_LENGTH];
UINT32 Offset;
UINT32 Version;
UINT32 FooterSignature1;
UINT32 FooterSignature2;
} HW_IMAGE_FOOTER;
#define HW_IMAGE_DESCRIPTION_REGION_MAX 4
// This structure is located at the end of a block when a file is present
typedef struct {
UINT32 EntryPoint;
UINT32 Attributes;
UINT32 RegionCount;
struct {
UINT32 LoadAddress;
UINT32 Size;
UINT32 Offset;
UINT32 Checksum;
} Region[HW_IMAGE_DESCRIPTION_REGION_MAX];
UINT32 BlockStart;
UINT32 BlockEnd;
UINT32 FooterChecksum;
HW_IMAGE_FOOTER Footer;
} HW_IMAGE_DESCRIPTION;
#endif

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/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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 <Library/IoLib.h>
#include <Library/NorFlashPlatformLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Protocol/SimpleFileSystem.h>
#include "BootMonFsInternal.h"
UINT32
BootMonFsChecksum (
IN VOID *Data,
IN UINT32 Size
)
{
UINT32 *Ptr;
UINT32 Word;
UINT32 Checksum;
ASSERT (Size % 4 == 0);
Checksum = 0;
Ptr = (UINT32*)Data;
while (Size > 0) {
Word = *Ptr++;
Size -= 4;
if (Word > ~Checksum) {
Checksum++;
}
Checksum += Word;
}
return ~Checksum;
}
EFI_STATUS
BootMonFsComputeFooterChecksum (
IN OUT HW_IMAGE_DESCRIPTION *Footer
)
{
HW_IMAGE_DESCRIPTION *Description;
UINT32 Index;
Footer->Attributes = 1;
Description = AllocateZeroPool (sizeof (HW_IMAGE_DESCRIPTION));
if (Description == NULL) {
DEBUG ((DEBUG_ERROR, "BootMonFsComputeFooterChecksum: Unable to allocate memory.\n"));
return EFI_OUT_OF_RESOURCES;
}
// Copy over to temporary shim
CopyMem (Description, Footer, sizeof (HW_IMAGE_DESCRIPTION));
// BootMon doesn't checksum the previous checksum
Description->FooterChecksum = 0;
// Blank out regions which aren't being used.
for (Index = Footer->RegionCount; Index < HW_IMAGE_DESCRIPTION_REGION_MAX; Index++) {
Description->Region[Index].Checksum = 0;
Description->Region[Index].LoadAddress = 0;
Description->Region[Index].Offset = 0;
Description->Region[Index].Size = 0;
}
// Compute the checksum
Footer->FooterChecksum = BootMonFsChecksum (Description, sizeof (HW_IMAGE_DESCRIPTION));
FreePool (Description);
return EFI_SUCCESS;
}
BOOLEAN
BootMonFsImageInThisBlock (
IN VOID *Buf,
IN UINTN Size,
IN UINT32 Block,
OUT HW_IMAGE_DESCRIPTION *Image
)
{
EFI_STATUS Status;
HW_IMAGE_FOOTER *Ptr;
HW_IMAGE_DESCRIPTION *Footer;
UINT32 Checksum;
// The footer is stored as the last thing in the block
Ptr = (HW_IMAGE_FOOTER *)((UINT8 *)Buf + Size - sizeof (HW_IMAGE_FOOTER));
// Check that the verification bytes are present
if ((Ptr->FooterSignature1 != HW_IMAGE_FOOTER_SIGNATURE_1) || (Ptr->FooterSignature2 != HW_IMAGE_FOOTER_SIGNATURE_2)) {
return FALSE;
}
if (Ptr->Version != HW_IMAGE_FOOTER_VERSION) {
return FALSE;
}
if (Ptr->Offset != HW_IMAGE_FOOTER_OFFSET) {
return FALSE;
}
Footer = (HW_IMAGE_DESCRIPTION *)(((UINT8 *)Buf + Size - sizeof (HW_IMAGE_DESCRIPTION)));
Checksum = Footer->FooterChecksum;
Status = BootMonFsComputeFooterChecksum (Footer);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Warning: failed to compute checksum for image '%a'\n", Footer->Footer.Filename));
}
if (Footer->FooterChecksum != Checksum) {
DEBUG ((DEBUG_ERROR, "Warning: image '%a' checksum mismatch.\n", Footer->Footer.Filename));
}
if ((Footer->BlockEnd != Block) || (Footer->BlockStart > Footer->BlockEnd)) {
return FALSE;
}
// Copy the image out
CopyMem (Image, Footer, sizeof (HW_IMAGE_DESCRIPTION));
return TRUE;
}
EFI_STATUS
BootMonFsDiscoverNextImage (
IN BOOTMON_FS_INSTANCE *Instance,
IN EFI_LBA *LbaStart,
OUT HW_IMAGE_DESCRIPTION *Image
)
{
EFI_BLOCK_IO_PROTOCOL *Blocks;
EFI_LBA CurrentLba;
VOID *Out;
Blocks = Instance->BlockIo;
// Allocate an output buffer
Out = AllocatePool (Instance->Media->BlockSize);
if (Out == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Blocks->Reset (Blocks, FALSE);
CurrentLba = *LbaStart;
// Look for images in the rest of this block
while (CurrentLba <= Instance->Media->LastBlock) {
// Read in the next block
Blocks->ReadBlocks (Blocks, Instance->Media->MediaId, CurrentLba, Instance->Media->BlockSize, Out);
// Check for an image in the current block
if (BootMonFsImageInThisBlock (Out, Instance->Media->BlockSize, (CurrentLba - Instance->Media->LowestAlignedLba), Image)) {
DEBUG ((EFI_D_ERROR, "Found image: %a in block %d.\n", &(Image->Footer.Filename), (UINTN)(CurrentLba - Instance->Media->LowestAlignedLba)));
FreePool (Out);
*LbaStart = Image->BlockEnd + 1;
return EFI_SUCCESS;
} else {
CurrentLba++;
}
}
*LbaStart = CurrentLba;
FreePool (Out);
return EFI_NOT_FOUND;
}
EFI_STATUS
BootMonFsInitialize (
IN BOOTMON_FS_INSTANCE *Instance
)
{
EFI_STATUS Status;
EFI_LBA Lba;
UINT32 ImageCount;
BOOTMON_FS_FILE *NewFile;
ImageCount = 0;
Lba = 0;
while (1) {
Status = BootMonFsCreateFile (Instance, &NewFile);
if (EFI_ERROR (Status)) {
return Status;
}
Status = BootMonFsDiscoverNextImage (Instance, &Lba, &(NewFile->HwDescription));
if (EFI_ERROR (Status)) {
// Free NewFile allocated by BootMonFsCreateFile ()
FreePool (NewFile);
break;
}
InsertTailList (&Instance->RootFile->Link, &NewFile->Link);
ImageCount++;
}
Instance->Initialized = TRUE;
return EFI_SUCCESS;
}

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/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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.
*
**/
#ifndef __BOOTMONFS_INTERNAL_H__
#define __BOOTMONFS_INTERNAL_H__
#include <PiDxe.h>
#include <Library/UefiLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Protocol/BlockIo.h>
#include <Protocol/DiskIo.h>
#include <Protocol/FirmwareVolumeBlock.h>
#include <Protocol/SimpleFileSystem.h>
#include <Guid/FileInfo.h>
#include <Guid/FileSystemInfo.h>
#include <Guid/FileSystemVolumeLabelInfo.h>
#include "BootMonFsHw.h"
#define BOOTMON_FS_VOLUME_LABEL L"NOR Flash"
typedef struct _BOOTMON_FS_INSTANCE BOOTMON_FS_INSTANCE;
typedef struct {
LIST_ENTRY Link;
VOID* Buffer;
UINTN Size;
UINT64 Offset; // Offset from the start of the file
} BOOTMON_FS_FILE_REGION;
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
BOOTMON_FS_INSTANCE *Instance;
HW_IMAGE_DESCRIPTION HwDescription;
EFI_FILE_PROTOCOL File;
UINT64 Position;
// If the file needs to be flushed then this list contain the memory buffer that creates this file
LIST_ENTRY RegionToFlushLink;
UINT64 OpenMode;
} BOOTMON_FS_FILE;
#define BOOTMON_FS_FILE_SIGNATURE SIGNATURE_32('b', 'o', 't', 'f')
#define BOOTMON_FS_FILE_FROM_FILE_THIS(a) CR (a, BOOTMON_FS_FILE, File, BOOTMON_FS_FILE_SIGNATURE)
#define BOOTMON_FS_FILE_FROM_LINK_THIS(a) CR (a, BOOTMON_FS_FILE, Link, BOOTMON_FS_FILE_SIGNATURE)
struct _BOOTMON_FS_INSTANCE {
UINT32 Signature;
EFI_HANDLE ControllerHandle;
LIST_ENTRY Link;
EFI_DRIVER_BINDING_PROTOCOL *Binding;
EFI_DISK_IO_PROTOCOL *DiskIo;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
EFI_BLOCK_IO_MEDIA *Media;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL Fs;
EFI_FILE_SYSTEM_INFO FsInfo;
CHAR16 Label[20];
BOOTMON_FS_FILE *RootFile; // All the other files are linked to this root
BOOLEAN Initialized;
};
#define BOOTMON_FS_SIGNATURE SIGNATURE_32('b', 'o', 't', 'm')
#define BOOTMON_FS_FROM_FS_THIS(a) CR (a, BOOTMON_FS_INSTANCE, Fs, BOOTMON_FS_SIGNATURE)
#define BOOTMON_FS_FROM_LINK(a) CR (a, BOOTMON_FS_INSTANCE, Link, BOOTMON_FS_SIGNATURE)
#include "BootMonFsApi.h"
#endif

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/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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 "BootMonFsInternal.h"
// Clear a file's image description on storage media:
// UEFI allows you to seek past the end of a file, a subsequent write will grow
// the file. It does not specify how space between the former end of the file
// and the beginning of the write should be filled. It's therefore possible that
// BootMonFs metadata, that comes after the end of a file, could be left there
// and wrongly detected by BootMonFsImageInBlock.
STATIC
EFI_STATUS
InvalidateImageDescription (
IN BOOTMON_FS_FILE *File
)
{
EFI_DISK_IO_PROTOCOL *DiskIo;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
UINT32 MediaId;
UINT32 BlockSize;
VOID *Buffer;
EFI_STATUS Status;
UINT64 DescriptionAddress;
DiskIo = File->Instance->DiskIo;
BlockIo = File->Instance->BlockIo;
MediaId = BlockIo->Media->MediaId;
BlockSize = BlockIo->Media->BlockSize;
DescriptionAddress = (File->HwDescription.BlockEnd * BlockSize)
- sizeof (HW_IMAGE_DESCRIPTION);
Buffer = AllocateZeroPool (sizeof (HW_IMAGE_DESCRIPTION));
Status = DiskIo->WriteDisk (DiskIo,
MediaId,
DescriptionAddress,
sizeof (HW_IMAGE_DESCRIPTION),
Buffer
);
FreePool(Buffer);
return Status;
}
// Flush file data that will extend the file's length. Update and, if necessary,
// move the image description.
// We need to pass the file's starting position on media (FileStart), because
// if the file hasn't been flushed before its Description->BlockStart won't
// have been initialised.
// FileStart must be aligned to the media's block size.
// Note that this function uses DiskIo to flush, so call BlockIo->FlushBlocks()
// after calling it.
STATIC
EFI_STATUS
FlushAppendRegion (
IN BOOTMON_FS_FILE *File,
IN BOOTMON_FS_FILE_REGION *Region,
IN UINT64 NewFileSize,
IN UINT64 FileStart
)
{
EFI_STATUS Status;
EFI_DISK_IO_PROTOCOL *DiskIo;
UINTN BlockSize;
HW_IMAGE_DESCRIPTION *Description;
DiskIo = File->Instance->DiskIo;
BlockSize = File->Instance->BlockIo->Media->BlockSize;
ASSERT (FileStart % BlockSize == 0);
// Only invalidate the Image Description of files that have already been
// written in Flash
if (File->HwDescription.RegionCount > 0) {
Status = InvalidateImageDescription (File);
ASSERT_EFI_ERROR (Status);
}
//
// Update File Description
//
Description = &File->HwDescription;
Description->Attributes = 1;
Description->BlockStart = FileStart / BlockSize;
Description->BlockEnd = Description->BlockStart + (NewFileSize / BlockSize);
Description->Footer.FooterSignature1 = HW_IMAGE_FOOTER_SIGNATURE_1;
Description->Footer.FooterSignature2 = HW_IMAGE_FOOTER_SIGNATURE_2;
Description->Footer.Version = HW_IMAGE_FOOTER_VERSION;
Description->Footer.Offset = HW_IMAGE_FOOTER_OFFSET;
Description->RegionCount = 1;
Description->Region[0].Checksum = 0;
Description->Region[0].Offset = Description->BlockStart * BlockSize;
Description->Region[0].Size = NewFileSize - sizeof (HW_IMAGE_DESCRIPTION);
Status = BootMonFsComputeFooterChecksum (Description);
if (EFI_ERROR (Status)) {
return Status;
}
// Write the new file data
Status = DiskIo->WriteDisk (
DiskIo,
File->Instance->Media->MediaId,
FileStart + Region->Offset,
Region->Size,
Region->Buffer
);
ASSERT_EFI_ERROR (Status);
// Round the file size up to the nearest block size
if ((NewFileSize % BlockSize) > 0) {
NewFileSize += BlockSize - (NewFileSize % BlockSize);
}
// Update the file description on the media
Status = DiskIo->WriteDisk (
DiskIo,
File->Instance->Media->MediaId,
(FileStart + NewFileSize) - sizeof (HW_IMAGE_DESCRIPTION),
sizeof (HW_IMAGE_DESCRIPTION),
Description
);
ASSERT_EFI_ERROR (Status);
return Status;
}
BOOLEAN
BootMonFsFileNeedFlush (
IN BOOTMON_FS_FILE *File
)
{
return !IsListEmpty (&File->RegionToFlushLink);
}
// Find a space on media for a file that has not yet been flushed to disk.
// Just returns the first space that's big enough.
// This function could easily be adapted to:
// - Find space for moving an existing file that has outgrown its space
// (We do not currently move files, just return EFI_VOLUME_FULL)
// - Find space for a fragment of a file that has outgrown its space
// (We do not currently fragment files - it's not clear whether fragmentation
// is actually part of BootMonFs as there is no spec)
// - Be more clever about finding space (choosing the largest or smallest
// suitable space)
// Parameters:
// File - the new (not yet flushed) file for which we need to find space.
// FileStart - the position on media of the file (in bytes).
STATIC
EFI_STATUS
BootMonFsFindSpaceForNewFile (
IN BOOTMON_FS_FILE *File,
OUT UINT64 *FileStart
)
{
LIST_ENTRY *FileLink;
BOOTMON_FS_FILE *RootFile;
BOOTMON_FS_FILE *FileEntry;
UINTN BlockSize;
UINT64 FileSize;
EFI_BLOCK_IO_MEDIA *Media;
Media = File->Instance->BlockIo->Media;
BlockSize = Media->BlockSize;
RootFile = File->Instance->RootFile;
if (IsListEmpty (&RootFile->Link)) {
return EFI_SUCCESS;
}
// This function must only be called for file which has not been flushed into
// Flash yet
ASSERT (File->HwDescription.RegionCount == 0);
// Find out how big the file will be
FileSize = BootMonFsGetImageLength (File);
// Add the file header to the file
FileSize += sizeof (HW_IMAGE_DESCRIPTION);
*FileStart = 0;
// Go through all the files in the list
for (FileLink = GetFirstNode (&RootFile->Link);
!IsNull (&RootFile->Link, FileLink);
FileLink = GetNextNode (&RootFile->Link, FileLink)
)
{
FileEntry = BOOTMON_FS_FILE_FROM_LINK_THIS (FileLink);
// If the free space preceding the file is big enough to contain the new
// file then use it!
if (((FileEntry->HwDescription.BlockStart * BlockSize) - *FileStart)
>= FileSize) {
// The file list must be in disk-order
RemoveEntryList (&File->Link);
File->Link.BackLink = FileLink->BackLink;
File->Link.ForwardLink = FileLink;
FileLink->BackLink->ForwardLink = &File->Link;
FileLink->BackLink = &File->Link;
return EFI_SUCCESS;
} else {
*FileStart = (FileEntry->HwDescription.BlockEnd + 1) * BlockSize;
}
}
// See if there's space after the last file
if ((((Media->LastBlock + 1) * BlockSize) - *FileStart) >= FileSize) {
return EFI_SUCCESS;
} else {
return EFI_VOLUME_FULL;
}
}
// Free the resources in the file's Region list.
STATIC
VOID
FreeFileRegions (
IN BOOTMON_FS_FILE *File
)
{
LIST_ENTRY *RegionToFlushLink;
BOOTMON_FS_FILE_REGION *Region;
RegionToFlushLink = GetFirstNode (&File->RegionToFlushLink);
while (!IsNull (&File->RegionToFlushLink, RegionToFlushLink)) {
// Repeatedly remove the first node from the list and free its resources.
Region = (BOOTMON_FS_FILE_REGION *) RegionToFlushLink;
RemoveEntryList (RegionToFlushLink);
FreePool (Region->Buffer);
FreePool (Region);
RegionToFlushLink = GetFirstNode (&File->RegionToFlushLink);
}
}
EFIAPI
EFI_STATUS
BootMonFsFlushFile (
IN EFI_FILE_PROTOCOL *This
)
{
EFI_STATUS Status;
BOOTMON_FS_INSTANCE *Instance;
LIST_ENTRY *RegionToFlushLink;
BOOTMON_FS_FILE *File;
BOOTMON_FS_FILE *NextFile;
BOOTMON_FS_FILE_REGION *Region;
LIST_ENTRY *FileLink;
UINTN CurrentPhysicalSize;
UINTN BlockSize;
UINT64 FileStart;
UINT64 FileEnd;
UINT64 RegionStart;
UINT64 RegionEnd;
UINT64 NewFileSize;
UINT64 EndOfAppendSpace;
BOOLEAN HasSpace;
EFI_DISK_IO_PROTOCOL *DiskIo;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
Status = EFI_SUCCESS;
FileStart = 0;
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (File == NULL) {
return EFI_INVALID_PARAMETER;
}
// Check if the file needs to be flushed
if (!BootMonFsFileNeedFlush (File)) {
return Status;
}
Instance = File->Instance;
BlockIo = Instance->BlockIo;
DiskIo = Instance->DiskIo;
BlockSize = BlockIo->Media->BlockSize;
// If the file doesn't exist then find a space for it
if (File->HwDescription.RegionCount == 0) {
Status = BootMonFsFindSpaceForNewFile (File, &FileStart);
// FileStart has changed so we need to recompute RegionEnd
if (EFI_ERROR (Status)) {
return Status;
}
} else {
FileStart = File->HwDescription.BlockStart * BlockSize;
}
// FileEnd is the NOR address of the end of the file's data
FileEnd = FileStart + BootMonFsGetImageLength (File);
for (RegionToFlushLink = GetFirstNode (&File->RegionToFlushLink);
!IsNull (&File->RegionToFlushLink, RegionToFlushLink);
RegionToFlushLink = GetNextNode (&File->RegionToFlushLink, RegionToFlushLink)
)
{
Region = (BOOTMON_FS_FILE_REGION*)RegionToFlushLink;
// RegionStart and RegionEnd are the the intended NOR address of the
// start and end of the region
RegionStart = FileStart + Region->Offset;
RegionEnd = RegionStart + Region->Size;
if (RegionEnd < FileEnd) {
// Handle regions representing edits to existing portions of the file
// Write the region data straight into the file
Status = DiskIo->WriteDisk (DiskIo,
BlockIo->Media->MediaId,
RegionStart,
Region->Size,
Region->Buffer
);
if (EFI_ERROR (Status)) {
return Status;
}
} else {
// Handle regions representing appends to the file
//
// Note: Since seeking past the end of the file with SetPosition() is
// valid, it's possible there will be a gap between the current end of
// the file and the beginning of the new region. Since the UEFI spec
// says nothing about this case (except "a subsequent write would grow
// the file"), we just leave garbage in the gap.
// Check if there is space to append the new region
HasSpace = FALSE;
NewFileSize = (RegionEnd - FileStart) + sizeof (HW_IMAGE_DESCRIPTION);
CurrentPhysicalSize = BootMonFsGetPhysicalSize (File);
if (NewFileSize <= CurrentPhysicalSize) {
HasSpace = TRUE;
} else {
// Get the File Description for the next file
FileLink = GetNextNode (&Instance->RootFile->Link, &File->Link);
if (!IsNull (&Instance->RootFile->Link, FileLink)) {
NextFile = BOOTMON_FS_FILE_FROM_LINK_THIS (FileLink);
// If there is space between the beginning of the current file and the
// beginning of the next file then use it
EndOfAppendSpace = NextFile->HwDescription.BlockStart * BlockSize;
} else {
// We are flushing the last file.
EndOfAppendSpace = (BlockIo->Media->LastBlock + 1) * BlockSize;
}
if (EndOfAppendSpace - FileStart >= NewFileSize) {
HasSpace = TRUE;
}
}
if (HasSpace == TRUE) {
Status = FlushAppendRegion (File, Region, NewFileSize, FileStart);
if (EFI_ERROR (Status)) {
return Status;
}
} else {
// There isn't a space for the file.
// Options here are to move the file or fragment it. However as files
// may represent boot images at fixed positions, these options will
// break booting if the bootloader doesn't use BootMonFs to find the
// image.
return EFI_VOLUME_FULL;
}
}
}
FreeFileRegions (File);
// Flush DiskIo Buffers (see UEFI Spec 12.7 - DiskIo buffers are flushed by
// calling FlushBlocks on the same device's BlockIo).
BlockIo->FlushBlocks (BlockIo);
return Status;
}
/**
Closes a file on the Nor Flash FS volume.
@param This The EFI_FILE_PROTOCOL to close.
@return Always returns EFI_SUCCESS.
**/
EFIAPI
EFI_STATUS
BootMonFsCloseFile (
IN EFI_FILE_PROTOCOL *This
)
{
// Flush the file if needed
This->Flush (This);
return EFI_SUCCESS;
}
// Create a new instance of BOOTMON_FS_FILE.
// Uses BootMonFsCreateFile to
STATIC
EFI_STATUS
CreateNewFile (
IN BOOTMON_FS_INSTANCE *Instance,
IN CHAR8* AsciiFileName,
OUT BOOTMON_FS_FILE **NewHandle
)
{
EFI_STATUS Status;
BOOTMON_FS_FILE *File;
Status = BootMonFsCreateFile (Instance, &File);
if (EFI_ERROR (Status)) {
return Status;
}
// Remove the leading '\\'
if (*AsciiFileName == '\\') {
AsciiFileName++;
}
// Set the file name
CopyMem (File->HwDescription.Footer.Filename, AsciiFileName, MAX_NAME_LENGTH);
// Add the file to list of files of the File System
InsertHeadList (&Instance->RootFile->Link, &File->Link);
*NewHandle = File;
return Status;
}
/**
Opens a file on the Nor Flash FS volume
Calls BootMonFsGetFileFromAsciiFilename to search the list of tracked files.
@param This The EFI_FILE_PROTOCOL parent handle.
@param NewHandle Double-pointer to the newly created protocol.
@param FileName The name of the image/metadata on flash
@param OpenMode Read,write,append etc
@param Attributes ?
@return EFI_STATUS
OUT_OF_RESOURCES
Run out of space to keep track of the allocated structures
DEVICE_ERROR
Unable to locate the volume associated with the parent file handle
NOT_FOUND
Filename wasn't found on flash
SUCCESS
**/
EFIAPI
EFI_STATUS
BootMonFsOpenFile (
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
BOOTMON_FS_FILE *Directory;
BOOTMON_FS_FILE *File;
BOOTMON_FS_INSTANCE *Instance;
CHAR8* AsciiFileName;
EFI_STATUS Status;
if ((FileName == NULL) || (NewHandle == NULL)) {
return EFI_INVALID_PARAMETER;
}
// The only valid modes are read, read/write, and read/write/create
if (!(OpenMode & EFI_FILE_MODE_READ) || ((OpenMode & EFI_FILE_MODE_CREATE) && !(OpenMode & EFI_FILE_MODE_WRITE))) {
return EFI_INVALID_PARAMETER;
}
Directory = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (Directory == NULL) {
return EFI_DEVICE_ERROR;
}
Instance = Directory->Instance;
// If the instance has not been initialized it yet then do it ...
if (!Instance->Initialized) {
Status = BootMonFsInitialize (Instance);
if (EFI_ERROR (Status)) {
return Status;
}
}
// BootMonFs interface requires ASCII filenames
AsciiFileName = AllocatePool ((StrLen (FileName) + 1) * sizeof (CHAR8));
if (AsciiFileName == NULL) {
return EFI_OUT_OF_RESOURCES;
}
UnicodeStrToAsciiStr (FileName, AsciiFileName);
if ((AsciiStrCmp (AsciiFileName, "\\") == 0) ||
(AsciiStrCmp (AsciiFileName, "/") == 0) ||
(AsciiStrCmp (AsciiFileName, "") == 0) ||
(AsciiStrCmp (AsciiFileName, ".") == 0))
{
//
// Opening '/', '\', '.', or the NULL pathname is trying to open the root directory
//
*NewHandle = &Instance->RootFile->File;
Instance->RootFile->Position = 0;
Status = EFI_SUCCESS;
} else {
//
// Open or Create a regular file
//
// Check if the file already exists
Status = BootMonGetFileFromAsciiFileName (Instance, AsciiFileName, &File);
if (Status == EFI_NOT_FOUND) {
// The file doesn't exist.
if (OpenMode & EFI_FILE_MODE_CREATE) {
// If the file does not exist but is required then create it.
if (Attributes & EFI_FILE_DIRECTORY) {
// BootMonFS doesn't support subdirectories
Status = EFI_UNSUPPORTED;
} else {
// Create a new file
Status = CreateNewFile (Instance, AsciiFileName, &File);
if (!EFI_ERROR (Status)) {
File->OpenMode = OpenMode;
*NewHandle = &File->File;
File->Position = 0;
}
}
}
} else if (Status == EFI_SUCCESS) {
// The file exists
File->OpenMode = OpenMode;
*NewHandle = &File->File;
File->Position = 0;
}
}
FreePool (AsciiFileName);
return Status;
}
// Delete() for the root directory's EFI_FILE_PROTOCOL instance
EFIAPI
EFI_STATUS
BootMonFsDeleteFail (
IN EFI_FILE_PROTOCOL *This
)
{
This->Close(This);
// You can't delete the root directory
return EFI_WARN_DELETE_FAILURE;
}
EFIAPI
EFI_STATUS
BootMonFsDelete (
IN EFI_FILE_PROTOCOL *This
)
{
EFI_STATUS Status;
BOOTMON_FS_FILE *File;
LIST_ENTRY *RegionToFlushLink;
BOOTMON_FS_FILE_REGION *Region;
HW_IMAGE_DESCRIPTION *Description;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
UINT8 *EmptyBuffer;
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (File == NULL) {
return EFI_DEVICE_ERROR;
}
Status = EFI_SUCCESS;
if (BootMonFsFileNeedFlush (File)) {
// Free the entries from the Buffer List
RegionToFlushLink = GetFirstNode (&File->RegionToFlushLink);
do {
Region = (BOOTMON_FS_FILE_REGION*)RegionToFlushLink;
// Get Next entry
RegionToFlushLink = RemoveEntryList (RegionToFlushLink);
// Free the buffers
FreePool (Region->Buffer);
FreePool (Region);
} while (!IsListEmpty (&File->RegionToFlushLink));
}
// If (RegionCount is greater than 0) then the file already exists
if (File->HwDescription.RegionCount > 0) {
Description = &File->HwDescription;
BlockIo = File->Instance->BlockIo;
// Create an empty buffer
EmptyBuffer = AllocateZeroPool (BlockIo->Media->BlockSize);
if (EmptyBuffer == NULL) {
FreePool (File);
return EFI_OUT_OF_RESOURCES;
}
// Invalidate the last Block
Status = BlockIo->WriteBlocks (BlockIo, BlockIo->Media->MediaId, Description->BlockEnd, BlockIo->Media->BlockSize, EmptyBuffer);
ASSERT_EFI_ERROR (Status);
FreePool (EmptyBuffer);
}
// Remove the entry from the list
RemoveEntryList (&File->Link);
FreePool (File);
return Status;
}

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/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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 <Protocol/SimpleFileSystem.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include "BootMonFsInternal.h"
EFIAPI
EFI_STATUS
BootMonFsReadFile (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
BOOTMON_FS_INSTANCE *Instance;
BOOTMON_FS_FILE *File;
EFI_DISK_IO_PROTOCOL *DiskIo;
EFI_BLOCK_IO_MEDIA *Media;
UINT64 FileStart;
EFI_STATUS Status;
UINTN RemainingFileSize;
// Ensure the file has been written in Flash before reading it.
// This keeps the code simple and avoids having to manage a non-flushed file.
BootMonFsFlushFile (This);
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (File == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = File->Instance;
DiskIo = Instance->DiskIo;
Media = Instance->Media;
FileStart = (Media->LowestAlignedLba + File->HwDescription.BlockStart) * Media->BlockSize;
if (File->Position >= File->HwDescription.Region[0].Size) {
// The entire file has been read
*BufferSize = 0;
return EFI_DEVICE_ERROR;
}
// This driver assumes that the entire file is in region 0.
RemainingFileSize = File->HwDescription.Region[0].Size - File->Position;
// If read would go past end of file, truncate the read
if (*BufferSize > RemainingFileSize) {
*BufferSize = RemainingFileSize;
}
Status = DiskIo->ReadDisk (
DiskIo,
Media->MediaId,
FileStart + File->Position,
*BufferSize,
Buffer
);
if (EFI_ERROR (Status)) {
*BufferSize = 0;
}
File->Position += *BufferSize;
return Status;
}
// Inserts an entry into the write chain
EFIAPI
EFI_STATUS
BootMonFsWriteFile (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
)
{
BOOTMON_FS_FILE *File;
BOOTMON_FS_FILE_REGION *Region;
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (File == NULL) {
return EFI_INVALID_PARAMETER;
}
if (!(File->OpenMode & EFI_FILE_MODE_WRITE)) {
return EFI_ACCESS_DENIED;
}
// Allocate and initialize the memory region
Region = (BOOTMON_FS_FILE_REGION*)AllocateZeroPool (sizeof (BOOTMON_FS_FILE_REGION));
if (Region == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Region->Buffer = AllocateCopyPool (*BufferSize, Buffer);
if (Region->Buffer == NULL) {
FreePool (Region);
return EFI_OUT_OF_RESOURCES;
}
Region->Size = *BufferSize;
Region->Offset = File->Position;
InsertTailList (&File->RegionToFlushLink, &Region->Link);
File->Position += *BufferSize;
return EFI_SUCCESS;
}
EFIAPI
EFI_STATUS
BootMonFsSetPosition (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
)
{
BOOTMON_FS_FILE *File;
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
// UEFI Spec section 12.5:
// "Seeking to position 0xFFFFFFFFFFFFFFFF causes the current position to
// be set to the end of the file."
if (Position == 0xFFFFFFFFFFFFFFFF) {
File->Position = BootMonFsGetImageLength (File);
} else {
// NB: Seeking past the end of the file is valid.
File->Position = Position;
}
return EFI_SUCCESS;
}
EFIAPI
EFI_STATUS
BootMonFsGetPosition (
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
) {
BOOTMON_FS_FILE *File;
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
*Position = File->Position;
return EFI_SUCCESS;
}

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/** @file
*
* Copyright (c) 2012-2014, ARM Limited. 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 "BootMonFsInternal.h"
EFIAPI
EFI_STATUS
BootMonFsSetPositionUnsupported (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
)
{
ASSERT(0);
return EFI_UNSUPPORTED;
}
EFIAPI
EFI_STATUS
BootMonFsGetPositionUnsupported (
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
)
{
ASSERT(0);
return EFI_UNSUPPORTED;
}