OvmfPkg: Add QemuFlashFvbServicesRuntimeDxe driver
If QEMU flash is detected, this module will install FirmwareVolumeBlock support for the QEMU flash device. It will also set PCDs with the results that: 1. OvmfPkg/EmuVariableFvbRuntimeDxe will be disabled 2. MdeModulePkg variable services will read/write flash directly Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> Acked-by: Laszlo Ersek <lersek@redhat.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14839 6f19259b-4bc3-4df7-8a09-765794883524
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137
OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbInfo.c
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137
OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbInfo.c
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/**@file
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Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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FvbInfo.c
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Abstract:
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Defines data structure that is the volume header found.These data is intent
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to decouple FVB driver with FV header.
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**/
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//
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// The package level header files this module uses
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//
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#include <PiDxe.h>
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//
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// The protocols, PPI and GUID defintions for this module
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//
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#include <Guid/EventGroup.h>
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#include <Guid/FirmwareFileSystem2.h>
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#include <Guid/SystemNvDataGuid.h>
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#include <Protocol/FirmwareVolumeBlock.h>
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#include <Protocol/DevicePath.h>
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//
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// The Library classes this module consumes
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//
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#include <Library/UefiLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/BaseLib.h>
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#include <Library/DxeServicesTableLib.h>
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#include <Library/UefiRuntimeLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/PcdLib.h>
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typedef struct {
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UINT64 FvLength;
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EFI_FIRMWARE_VOLUME_HEADER FvbInfo;
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//
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// EFI_FV_BLOCK_MAP_ENTRY ExtraBlockMap[n];//n=0
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//
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EFI_FV_BLOCK_MAP_ENTRY End[1];
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} EFI_FVB_MEDIA_INFO;
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EFI_FVB_MEDIA_INFO mPlatformFvbMediaInfo[] = {
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//
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// Systen NvStorage FVB
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//
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{
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FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
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FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize),
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{
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{
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0,
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}, // ZeroVector[16]
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EFI_SYSTEM_NV_DATA_FV_GUID,
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FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
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FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize),
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EFI_FVH_SIGNATURE,
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EFI_FVB2_MEMORY_MAPPED |
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EFI_FVB2_READ_ENABLED_CAP |
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EFI_FVB2_READ_STATUS |
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EFI_FVB2_WRITE_ENABLED_CAP |
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EFI_FVB2_WRITE_STATUS |
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EFI_FVB2_ERASE_POLARITY |
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EFI_FVB2_ALIGNMENT_16,
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sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
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0, // CheckSum
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0, // ExtHeaderOffset
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{
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0,
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}, // Reserved[1]
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2, // Revision
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{
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(FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
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FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize)) / FixedPcdGet32 (PcdOvmfFirmwareBlockSize),
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FixedPcdGet32 (PcdOvmfFirmwareBlockSize),
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}
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},
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{
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0,
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0
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}
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}
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};
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EFI_STATUS
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GetFvbInfo (
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IN UINT64 FvLength,
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OUT EFI_FIRMWARE_VOLUME_HEADER **FvbInfo
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)
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{
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STATIC BOOLEAN Checksummed = FALSE;
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UINTN Index;
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if (!Checksummed) {
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for (Index = 0; Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO); Index += 1) {
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UINT16 Checksum;
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mPlatformFvbMediaInfo[Index].FvbInfo.Checksum = 0;
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Checksum = CalculateCheckSum16 (
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(UINT16*) &mPlatformFvbMediaInfo[Index].FvbInfo,
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mPlatformFvbMediaInfo[Index].FvbInfo.HeaderLength
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);
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mPlatformFvbMediaInfo[Index].FvbInfo.Checksum = Checksum;
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}
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Checksummed = TRUE;
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}
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for (Index = 0; Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO); Index += 1) {
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if (mPlatformFvbMediaInfo[Index].FvLength == FvLength) {
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*FvbInfo = &mPlatformFvbMediaInfo[Index].FvbInfo;
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return EFI_SUCCESS;
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}
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}
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return EFI_NOT_FOUND;
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}
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