Hi Jose, Thank you very much for the detail information. The output of ifdtool in layout.txt is: 00000000:00000fff fd 00300000:007fffff bios 00001000:002fffff me
So the original bios size is 0x500000 = 5MB You wrote: if the size of the original BIOS is bigger or equal than coreboot build you are good to go ahead. The original "ROM chip size" in menuconfig is 2MB. Should I change it to 8MB ? I'm aware my board is not identical to the "Bayley Bay FSP-based CRB" Should I use another board as reference ? Best regards, Zvika On Tue, Sep 25, 2018 at 10:16 AM Jose Trujillo <[email protected]> wrote: > Hello Zvika: > > First get the correct original full 8MB FW from the manufacturer or dump > it from the board with the command in EFI: > "ftp -d BYT_orig.bin" and double save it. > > 2.- in coreboot/util/ifdtool do make and sudo make install. > 3.- in terminal go to the FW directory and do: "ifdtool BYT_orig.bin -f > fw_layout.txt" > a).- in "fw_layout.txt" you will get the BIOS area size from the > original FW (just substract). > b).- if the size of the original BIOS is bigger or equal than > coreboot build you are good to go ahead. > 4.- copy/move "BYT_orig.bin" in the directory which resides the coreboot > folder (not inside the coreboot folder) and do: > ifdtool -i BIOS:./coreboot/build/coreboot.rom CB_baytrail.bin > 5.- flash it: "fpt -f CB_baytrail.bin" booting from UEFI. > > If the build was correctly done and followed accurately those steps the > system should boot. > > Good luck, > Jose Trujillo. > > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ > On Monday, September 24, 2018 10:18 PM, Zvi Vered <[email protected]> > wrote: > > Hello, > > I have an Intel's ATOM Bay Trail board. The output of "inteltool" is: > > CPU: ID 0x30679, Processor Type 0x0, Family 0x6, Model 0x37, Stepping 0x9 > Northbridge: 8086:0f00 (Bay Trail) > Southbridge: 8086:0f1c (Bay Trail) > IGD: 8086:0f31 (unknown) > > In coreboot configuration I selected: > Mainboard -> Mainboard model -> Bayley Bay FSP-based CRB > The default ROM chip size is 2MB. > This is also the size of coreboot.rom created after "make" > > The board has 8MB BIOS flash. > It's delivered with a BIOS programming utility that runs under EFI shell. > > The original BIOS has 2 versions: rom (5MB) and bin (8MB) > I tried to burn the 2MB coreboot.rom with the vendor's BIOS utlity. > > I got: > 3 - Error: ROM file size does not match existing BIOS size. > Should I convert coreboot.rom to coreboot.bin ? How ? > If not, how can I program coreboot.rom ? > > Thank you, > Zvika > > >
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