Add PlatformFlashAccessLib for capsule update.

Cc: David Wei <david....@intel.com>
Cc: Feng Tian <feng.t...@intel.com>
Cc: Star Zeng <star.z...@intel.com>
Cc: Michael D Kinney <michael.d.kin...@intel.com>
Cc: Liming Gao <liming....@intel.com>
Cc: Chao Zhang <chao.b.zh...@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen....@intel.com>
---
 
Vlv2TbltDevicePkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLib.c
   | 192 ++++++++++++++++++++
 
Vlv2TbltDevicePkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLib.inf
 |  47 +++++
 2 files changed, 239 insertions(+)

diff --git 
a/Vlv2TbltDevicePkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLib.c
 
b/Vlv2TbltDevicePkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLib.c
new file mode 100644
index 0000000..ae8b171
--- /dev/null
+++ 
b/Vlv2TbltDevicePkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLib.c
@@ -0,0 +1,192 @@
+/** @file
+  Platform Flash Access library.
+
+  Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD 
License
+  which accompanies this distribution.  The full text of the license may be 
found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <PiDxe.h>
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PlatformFlashAccessLib.h>
+#include <Library/FlashDeviceLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+#define SECTOR_SIZE_64KB  0x10000      // Common 64kBytes sector size
+#define ALINGED_SIZE  SECTOR_SIZE_64KB
+
+STATIC EFI_PHYSICAL_ADDRESS     mInternalFdAddress;
+
+/**
+  Perform flash write opreation.
+
+  @param FirmwareType      The type of firmware.
+  @param FlashAddress      The address of flash device to be accessed.
+  @param FlashAddressType  The type of flash device address.
+  @param Buffer            The pointer to the data buffer.
+  @param Length            The length of data buffer in bytes.
+
+  @retval EFI_SUCCESS           The operation returns successfully.
+  @retval EFI_WRITE_PROTECTED   The flash device is read only.
+  @retval EFI_UNSUPPORTED       The flash device access is unsupported.
+  @retval EFI_INVALID_PARAMETER The input parameter is not valid.
+**/
+EFI_STATUS
+EFIAPI
+PerformFlashWrite(
+  IN PLATFORM_FIRMWARE_TYPE       FirmwareType,
+  IN EFI_PHYSICAL_ADDRESS         FlashAddress,
+  IN FLASH_ADDRESS_TYPE           FlashAddressType,
+  IN VOID                         *Buffer,
+  IN UINTN                        Length
+  )
+{
+  EFI_STATUS          Status;
+
+  DEBUG((EFI_D_INFO, "PerformFlashWrite - 0x%x(%x) - 0x%x\n", 
(UINTN)FlashAddress, (UINTN)FlashAddressType, Length));
+  if (FirmwareType >= PlatformFirmwareTypeMax) {
+    return EFI_UNSUPPORTED;
+  }
+  if (FlashAddressType == FlashAddressTypeRelativeAddress) {
+    FlashAddress = FlashAddress + mInternalFdAddress;
+  }
+
+  LibFvbFlashDeviceBlockLock(FlashAddress, Length, FALSE);
+
+  //
+  // Erase & Write
+  //
+  Status = LibFvbFlashDeviceBlockErase((UINTN)FlashAddress, Length);
+  ASSERT_EFI_ERROR(Status);
+  if (EFI_ERROR(Status)) {
+    LibFvbFlashDeviceBlockLock(FlashAddress, Length, TRUE);
+    DEBUG((EFI_D_ERROR, "Flash Erase error\n"));
+    return Status;
+  }
+
+  Status = LibFvbFlashDeviceWrite((UINTN)FlashAddress, &Length, Buffer);
+  ASSERT_EFI_ERROR(Status);
+  if (EFI_ERROR(Status)) {
+    LibFvbFlashDeviceBlockLock(FlashAddress, Length, TRUE);
+    DEBUG((EFI_D_ERROR, "Flash write error\n"));
+    return Status;
+  }
+
+  LibFvbFlashDeviceBlockLock(FlashAddress, Length, TRUE);
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Perform microcode write opreation.
+
+  @param FlashAddress      The address of flash device to be accessed.
+  @param Buffer            The pointer to the data buffer.
+  @param Length            The length of data buffer in bytes.
+
+  @retval EFI_SUCCESS           The operation returns successfully.
+  @retval EFI_WRITE_PROTECTED   The flash device is read only.
+  @retval EFI_UNSUPPORTED       The flash device access is unsupported.
+  @retval EFI_INVALID_PARAMETER The input parameter is not valid.
+**/
+EFI_STATUS
+EFIAPI
+MicrocodeFlashWrite(
+  IN EFI_PHYSICAL_ADDRESS         FlashAddress,
+  IN VOID                         *Buffer,
+  IN UINTN                        Length
+  )
+{
+  EFI_PHYSICAL_ADDRESS         AlignedFlashAddress;
+  VOID                         *AlignedBuffer;
+  UINTN                        AlignedLength;
+  UINTN                        OffsetHead;
+  UINTN                        OffsetTail;
+  EFI_STATUS                   Status;
+
+  DEBUG((EFI_D_INFO, "MicrocodeFlashWrite - 0x%x - 0x%x\n", 
(UINTN)FlashAddress, Length));
+
+  //
+  // Need make buffer 64K aligned to support ERASE
+  //
+  // [Aligned]    FlashAddress    [Aligned]
+  // |              |                     |
+  // V              V                     V
+  // +--------------+========+------------+
+  // | OffsetHeader | Length | OffsetTail |
+  // +--------------+========+------------+
+  // ^
+  // |<-----------AlignedLength----------->
+  // |
+  // AlignedFlashAddress
+  //
+  OffsetHead = FlashAddress & (ALINGED_SIZE - 1);
+  OffsetTail = (FlashAddress + Length) & (ALINGED_SIZE - 1);
+  if (OffsetTail != 0) {
+    OffsetTail = ALINGED_SIZE - OffsetTail;
+  }
+
+  if ((OffsetHead != 0) || (OffsetTail != 0)) {
+    AlignedFlashAddress = FlashAddress - OffsetHead;
+    AlignedLength = Length + OffsetHead + OffsetTail;
+
+    AlignedBuffer = AllocatePool(AlignedLength);
+    if (AlignedBuffer == NULL) {
+      return EFI_OUT_OF_RESOURCES;
+    }
+    //
+    // Save original buffer
+    //
+    if (OffsetHead != 0) {
+      CopyMem((UINT8 *)AlignedBuffer, (VOID *)AlignedFlashAddress, OffsetHead);
+    }
+    if (OffsetTail != 0) {
+      CopyMem((UINT8 *)AlignedBuffer + OffsetHead + Length, (VOID 
*)(AlignedFlashAddress + OffsetHead + Length), OffsetTail);
+    }
+    //
+    // Override new buffer
+    //
+    CopyMem((UINT8 *)AlignedBuffer + OffsetHead, Buffer, Length);
+  } else {
+    AlignedFlashAddress = FlashAddress;
+    AlignedBuffer = Buffer;
+    AlignedLength = Length;
+  }
+
+  Status = PerformFlashWrite(
+             PlatformFirmwareTypeBios,
+             AlignedFlashAddress,
+             FlashAddressTypeAbsoluteAddress,
+             AlignedBuffer,
+             AlignedLength
+             );
+  if ((OffsetHead != 0) || (OffsetTail != 0)) {
+    FreePool (AlignedBuffer);
+  }
+  return Status;
+}
+
+/**
+  Platform Flash Access Lib Constructor.
+**/
+EFI_STATUS
+EFIAPI
+PerformFlashAccessLibConstructor (
+  VOID
+  )
+{
+  mInternalFdAddress = FixedPcdGet64(PcdFlashAreaBaseAddress);
+  DEBUG((EFI_D_INFO, "PcdFlashAreaBaseAddress - 0x%x\n", mInternalFdAddress));
+
+  return EFI_SUCCESS;
+}
diff --git 
a/Vlv2TbltDevicePkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLib.inf
 
b/Vlv2TbltDevicePkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLib.inf
new file mode 100644
index 0000000..18c2809
--- /dev/null
+++ 
b/Vlv2TbltDevicePkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLib.inf
@@ -0,0 +1,47 @@
+## @file
+#  Platform Flash Access library.
+#
+#  Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+#  This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD 
License
+#  which accompanies this distribution.  The full text of the license may be 
found at
+#  http://opensource.org/licenses/bsd-license.php
+#
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR 
IMPLIED.
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = PlatformFlashAccessLib
+  FILE_GUID                      = 31CF9CEC-DA4E-4505-AA20-33364A291A95
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = PlatformFlashAccessLib
+  LIBRARY_CLASS                  = MicrocodeFlashAccessLib
+  CONSTRUCTOR                    = PerformFlashAccessLibConstructor
+
+#
+# The following information is for reference only and not required by the 
build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources]
+  PlatformFlashAccessLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  Vlv2TbltDevicePkg/PlatformPkg.dec
+
+[LibraryClasses]
+  BaseMemoryLib
+  PcdLib
+  DebugLib
+  FlashDeviceLib
+  MemoryAllocationLib
+
+[FixedPcd]
+  gPlatformModuleTokenSpaceGuid.PcdFlashAreaBaseAddress
-- 
2.7.4.windows.1

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