diff options
| author | Star Zeng <star.zeng@intel.com> | 2013-09-16 01:50:44 +0000 |
|---|---|---|
| committer | lzeng14 <lzeng14@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-09-16 01:50:44 +0000 |
| commit | 3837e91c58d4b626a91895b68b32cb59679787e8 (patch) | |
| tree | f1db89ab188b72e7d91895fcd45c9a0bdec10f2b /MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.c | |
| parent | 82ea59a0124ff77e9cd6f558d4cb8555eeb9ea4a (diff) | |
| download | edk2-platforms-3837e91c58d4b626a91895b68b32cb59679787e8.tar.xz | |
MdeModulePkg: Add support for weakly aligned FVs.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14671 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.c')
| -rw-r--r-- | MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.c b/MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.c index 523738d52d..27a7f43fe5 100644 --- a/MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.c +++ b/MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.c @@ -474,22 +474,31 @@ ProduceFVBProtocolOnBuffer ( if (FwVolHeader->Signature != EFI_FVH_SIGNATURE) {
return EFI_VOLUME_CORRUPTED;
}
+
//
- // Get FvHeader alignment
- //
- FvAlignment = 1 << ((FwVolHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16);
- //
- // FvAlignment must be greater than or equal to 8 bytes of the minimum FFS alignment value.
+ // If EFI_FVB2_WEAK_ALIGNMENT is set in the volume header then the first byte of the volume
+ // can be aligned on any power-of-two boundary. A weakly aligned volume can not be moved from
+ // its initial linked location and maintain its alignment.
//
- if (FvAlignment < 8) {
- FvAlignment = 8;
- }
- if ((UINTN)BaseAddress % FvAlignment != 0) {
+ if ((FwVolHeader->Attributes & EFI_FVB2_WEAK_ALIGNMENT) != EFI_FVB2_WEAK_ALIGNMENT) {
//
- // FvImage buffer is not at its required alignment.
+ // Get FvHeader alignment
//
- return EFI_VOLUME_CORRUPTED;
+ FvAlignment = 1 << ((FwVolHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16);
+ //
+ // FvAlignment must be greater than or equal to 8 bytes of the minimum FFS alignment value.
+ //
+ if (FvAlignment < 8) {
+ FvAlignment = 8;
+ }
+ if ((UINTN)BaseAddress % FvAlignment != 0) {
+ //
+ // FvImage buffer is not at its required alignment.
+ //
+ return EFI_VOLUME_CORRUPTED;
+ }
}
+
//
// Allocate EFI_FW_VOL_BLOCK_DEVICE
//
|