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| author | Jordan Justen <jordan.l.justen@intel.com> | 2013-11-12 18:34:52 +0000 |
|---|---|---|
| committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-11-12 18:34:52 +0000 |
| commit | a4ce9ffd470dbbab07ad1a9caeab5049b5a4bb6a (patch) | |
| tree | 355648c63c335393db9e84dffbd0e8da5998f413 /OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbInfo.c | |
| parent | 4313b26de098b959668e1c061f1242063d20e81e (diff) | |
| download | edk2-a4ce9ffd470dbbab07ad1a9caeab5049b5a4bb6a.tar.gz edk2-a4ce9ffd470dbbab07ad1a9caeab5049b5a4bb6a.tar.bz2 edk2-a4ce9ffd470dbbab07ad1a9caeab5049b5a4bb6a.zip | |
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
Diffstat (limited to 'OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbInfo.c')
| -rw-r--r-- | OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbInfo.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbInfo.c b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbInfo.c new file mode 100644 index 0000000000..72845f9555 --- /dev/null +++ b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbInfo.c @@ -0,0 +1,137 @@ +/**@file
+
+Copyright (c) 2006, 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.
+
+Module Name:
+
+ FvbInfo.c
+
+Abstract:
+
+ Defines data structure that is the volume header found.These data is intent
+ to decouple FVB driver with FV header.
+
+**/
+
+//
+// The package level header files this module uses
+//
+#include <PiDxe.h>
+//
+// The protocols, PPI and GUID defintions for this module
+//
+#include <Guid/EventGroup.h>
+#include <Guid/FirmwareFileSystem2.h>
+#include <Guid/SystemNvDataGuid.h>
+#include <Protocol/FirmwareVolumeBlock.h>
+#include <Protocol/DevicePath.h>
+//
+// The Library classes this module consumes
+//
+#include <Library/UefiLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/BaseLib.h>
+#include <Library/DxeServicesTableLib.h>
+#include <Library/UefiRuntimeLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/PcdLib.h>
+
+typedef struct {
+ UINT64 FvLength;
+ EFI_FIRMWARE_VOLUME_HEADER FvbInfo;
+ //
+ // EFI_FV_BLOCK_MAP_ENTRY ExtraBlockMap[n];//n=0
+ //
+ EFI_FV_BLOCK_MAP_ENTRY End[1];
+} EFI_FVB_MEDIA_INFO;
+
+EFI_FVB_MEDIA_INFO mPlatformFvbMediaInfo[] = {
+ //
+ // Systen NvStorage FVB
+ //
+ {
+ FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
+ FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
+ FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
+ FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize),
+ {
+ {
+ 0,
+ }, // ZeroVector[16]
+ EFI_SYSTEM_NV_DATA_FV_GUID,
+ FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
+ FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
+ FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
+ FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize),
+ EFI_FVH_SIGNATURE,
+ EFI_FVB2_MEMORY_MAPPED |
+ EFI_FVB2_READ_ENABLED_CAP |
+ EFI_FVB2_READ_STATUS |
+ EFI_FVB2_WRITE_ENABLED_CAP |
+ EFI_FVB2_WRITE_STATUS |
+ EFI_FVB2_ERASE_POLARITY |
+ EFI_FVB2_ALIGNMENT_16,
+ sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
+ 0, // CheckSum
+ 0, // ExtHeaderOffset
+ {
+ 0,
+ }, // Reserved[1]
+ 2, // Revision
+ {
+ (FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
+ FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
+ FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
+ FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize)) / FixedPcdGet32 (PcdOvmfFirmwareBlockSize),
+ FixedPcdGet32 (PcdOvmfFirmwareBlockSize),
+ }
+ },
+ {
+ 0,
+ 0
+ }
+ }
+};
+
+EFI_STATUS
+GetFvbInfo (
+ IN UINT64 FvLength,
+ OUT EFI_FIRMWARE_VOLUME_HEADER **FvbInfo
+ )
+{
+ STATIC BOOLEAN Checksummed = FALSE;
+ UINTN Index;
+
+ if (!Checksummed) {
+ for (Index = 0; Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO); Index += 1) {
+ UINT16 Checksum;
+ mPlatformFvbMediaInfo[Index].FvbInfo.Checksum = 0;
+ Checksum = CalculateCheckSum16 (
+ (UINT16*) &mPlatformFvbMediaInfo[Index].FvbInfo,
+ mPlatformFvbMediaInfo[Index].FvbInfo.HeaderLength
+ );
+ mPlatformFvbMediaInfo[Index].FvbInfo.Checksum = Checksum;
+ }
+ Checksummed = TRUE;
+ }
+
+ for (Index = 0; Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO); Index += 1) {
+ if (mPlatformFvbMediaInfo[Index].FvLength == FvLength) {
+ *FvbInfo = &mPlatformFvbMediaInfo[Index].FvbInfo;
+ return EFI_SUCCESS;
+ }
+ }
+
+ return EFI_NOT_FOUND;
+}
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