> On Oct 27, 2014, at 12:11 PM, Narinder Dhillon <ndhillo...@gmail.com> wrote: > > Hi Liming, > > Yes, the patch helped and now the initialization is not stuck in a loop. > When UEFI runs for the first time, eMMC flash device is blank and there will > not be any information or FVB header. Would UEFI create one ? Or do I have to > create a volume first before UEFI will start using it ?
The assumption is it is formatted, the DXE does not attempt to format the volume. Thanks, Andrew Fish > Thanx. > > On Mon, Oct 27, 2014 at 3:24 AM, Gao, Liming <liming....@intel.com > <mailto:liming....@intel.com>> wrote: > Hi, > > DxeCore has FVB notify function to call FVB protocol to check whether a FV > image is there. DxeCore will read FV header, then base on header length to > read the whole FV header, last check FV header. If your FV is not PI FFS > format, its FV header length field is invalid that causes DxeCore wrongly > read data. To avoid it, DxeCore could be enhanced to check FV header first, > then read full header. Could you apply the attached patch to DxeCore module > and check again? > > > > Thanks > > Liming > > From: Narinder Dhillon [mailto:ndhillo...@gmail.com > <mailto:ndhillo...@gmail.com>] > Sent: Monday, October 27, 2014 8:44 AM > To: edk2-devel@lists.sourceforge.net <mailto:edk2-devel@lists.sourceforge.net> > Subject: [edk2] Firmware Volume Block Protocol > > > > Hi All, > > > > I am trying to implement a non-volatile variable storage on a small part of > eMMC device. I have implemented the FVB protocol and the 'Read' function is > being called with increasing 'Lba' during UEFI boot. > > > > Where is the 'Read' function is being called from ? (some sort of > initialization code) > > Why will it not stop ? > > The 'Read' function is being called with increasing Lba till my board hangs. > > > > FvbRead Lba:2 Offset:0, Numbytes:512 0x200 > > FvbRead Lba:3 Offset:0, Numbytes:512 0x200 > > FvbRead Lba:4 Offset:0, Numbytes:512 0x200 > > > > Thanx. > > > > > ------------------------------------------------------------------------------ > > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.sourceforge.net <mailto:edk2-devel@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/edk2-devel > <https://lists.sourceforge.net/lists/listinfo/edk2-devel> > > > ------------------------------------------------------------------------------ > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/edk2-devel
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