sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

MdeModulePkg: Add support for weakly aligned FVs.

Browse Source 
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
This commit is contained in:
Star Zeng
2013-09-16 01:50:44 +00:00
committed by lzeng14
parent 82ea59a012
commit 3837e91c58
4 changed files with 87 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
MdeModulePkg/Core/Dxe/FwVolBlock/FwVolBlock.c
View File

@@ -474,22 +474,31 @@ ProduceFVBProtocolOnBuffer (
if (FwVolHeader->Signature != EFI_FVH_SIGNATURE) {
return EFI_VOLUME_CORRUPTED;
}
//
// Get FvHeader alignment
// 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.
//
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) {
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
//