> On Jul 18, 2016, at 1:42 PM, Michael Zimmermann <[email protected]> > wrote: > > > For example This statement in the [FD.MEMFD] section will cause this region > > of the FLASH to get padded out if the FV is smaller than 0xA00000 > > that seems to be the problem because the Size in the FV header is set to that > value and the file FVMAIN_COMPACT.Fv always has that size. > > of course I could just make it smaller, but in this case I'd have to adjust > it to the current size and increase it every time I need more space to fix > the build error. > It would be easier to just be able to remove the 0xFF padding for the FV, or > at least have a clean way to remove it afterwards by external tools. > > to make things easier I'll link my source here: > https://github.com/efidroid/uefi_edk2packages_LittleKernelPkg/blob/master/LittleKernelPkg.fdf > > <https://github.com/efidroid/uefi_edk2packages_LittleKernelPkg/blob/master/LittleKernelPkg.fdf> >
What is the size of the FVMAIN_COMPACT if you don't place it in the FD? Thanks, Andrew Fish > Thanks > Michael > > > On Mon, Jul 18, 2016 at 10:03 PM, Andrew Fish <[email protected] > <mailto:[email protected]>> wrote: > > > On Jul 18, 2016, at 9:07 AM, Michael Zimmermann <[email protected] > > <mailto:[email protected]>> wrote: > > > > > > I don't need/use XIP or relocation(would the latter make a difference > > anyway?). > > > > Also the difference between FD and FV seems to be terminology only, because > > YOURPLATFORM.fd has the same checksum as FVMAIN_COMPACT.Fv. > > > > What I successfully tested as a workaround is reading > > EFI_FV_TAKEN_SIZE from FVMAIN_COMPACT.Fv.map and strip the file to that > > size. > > That seems to work, but I'm not sure if it's exact, because there are still > > a few 0xff bytes left and I'm not sure if these really are for aligning the > > size only. > > > > Michael, > > The FD is a collection of FVs and Data regions output by the build system. If > all you have is an FV you should just use that. You can reduce the padding by > setting the BlockSize smaller. The FvAlignment value (commonly 16) would be a > good value to try. Any padding after that is coming from the FD creation: > https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgX64.fdf#L91 > <https://github.com/tianocore/edk2/blob/master/OvmfPkg/OvmfPkgX64.fdf#L91> > > 0x100000|0xA00000 > gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvBase|gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvSize > FV = DXEFV > > For example This statement in the [FD.MEMFD] section will cause this region > of the FLASH to get padded out if the FV is smaller than 0xA00000 > > The FV will start with an EFI_FIRMWARE_VOLUME_HEADER, > https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Pi/PiFirmwareVolume.h#L105 > > <https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Pi/PiFirmwareVolume.h#L105> > , so you can programmatically figure out how big it is if you need to copy > it. > > Thanks, > > Andrew Fish > > > Thanks > > Michael > > > > On Mon, Jul 18, 2016 at 5:28 PM, Andrew Fish <[email protected] > > <mailto:[email protected]>> wrote: > > > >> > >>> On Jul 17, 2016, at 11:02 PM, Michael Zimmermann < > >> [email protected] <mailto:[email protected]>> wrote: > >>> > >>> > >>> Hi, > >>> > >>> I noticed that the size of YOURPLATFORM.fd always equals the size > >> specified > >>> in your fdf > >>> i.e. 4MB for 'Size = 0x00400000|gArmTokenSpaceGuid.PcdFdSize'. > >>> > >>> I don't know much about the case where this gets flashed to a nand and > >>> executed in place, but when using edk2 on a ARM PrePi device with edk2 > >>> loaded into RAM, this looks like a huge waste of storage memory and > >> loading > >>> time to me. > >>> > >>> So, is it really important to have multiple MB(depending of you fv size > >>> ofc) of 0xff appended to the firmware or is there a fdf option or > >>> post-compilation tool to remove this? > >>> > >> > >> The YOURPLATFORM.fd is a Flash Device (.fd) and thus there is an > >> assumption it is a fixed size. If you want a flexible size you can use an > >> FV. Are you dependent on relocating the code so it can XIP? Is that what if > >> forcing the use of an FD? > >> > >> Just trying to figure out if what you are really asking for is the ability > >> to relocate an FV that is only as big as required? Maybe that is an FD, > >> maybe not? > >> > >> Short term if your FD is just a single FV you can use a PCD to know the > >> size and only copy that much data to the RAM. You would have to manually > >> pick an FD size that did not waist too much storage. > >> > >> Thanks, > >> > >> Andrew Fish > >> > >>> Thanks > >>> Michael > >>> _______________________________________________ > >>> edk2-devel mailing list > >>> [email protected] <mailto:[email protected]> > >>> > >> https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.01.org_mailman_listinfo_edk2-2Ddevel&d=CwICAg&c=Hw-EJUFt2_D9PK5csBJ29kRV40HqSDXWTLPyZ6W8u84&r=4sdzHKz0eU1vXqaUySVmyA&m=Kr0PunsxtwGLmV7IsSEodsro5Wwu2oRxRh1L7fFpt3w&s=FXzJ7wYg-xu4aJ-6YGBqB4GTUNMVu1W9h8mqqf864YQ&e= > >> > >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.01.org_mailman_listinfo_edk2-2Ddevel&d=CwICAg&c=Hw-EJUFt2_D9PK5csBJ29kRV40HqSDXWTLPyZ6W8u84&r=4sdzHKz0eU1vXqaUySVmyA&m=Kr0PunsxtwGLmV7IsSEodsro5Wwu2oRxRh1L7fFpt3w&s=FXzJ7wYg-xu4aJ-6YGBqB4GTUNMVu1W9h8mqqf864YQ&e=> > >> > >> > > _______________________________________________ > > edk2-devel mailing list > > [email protected] <mailto:[email protected]> > > https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.01.org_mailman_listinfo_edk2-2Ddevel&d=CwICAg&c=Hw-EJUFt2_D9PK5csBJ29kRV40HqSDXWTLPyZ6W8u84&r=4sdzHKz0eU1vXqaUySVmyA&m=GBYUQYXoyDqknWeJcI64xlIkHnhnVmabgBV1ABmDeZs&s=QSUxiPKjBWf7bkI3IIL0E8JliL4vuwEWURFyB2oQQ0E&e= > > > > <https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.01.org_mailman_listinfo_edk2-2Ddevel&d=CwICAg&c=Hw-EJUFt2_D9PK5csBJ29kRV40HqSDXWTLPyZ6W8u84&r=4sdzHKz0eU1vXqaUySVmyA&m=GBYUQYXoyDqknWeJcI64xlIkHnhnVmabgBV1ABmDeZs&s=QSUxiPKjBWf7bkI3IIL0E8JliL4vuwEWURFyB2oQQ0E&e=> > > _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
