[U-Boot] x86: Updating u-boot.bin vs u-boot.rom

[Simon Glass]

Hi Stefan,

On 6 October 2016 at 02:12, Stefan Roese <sr at denx.de> wrote:
> Hi Bin, Hi Simon,
>
> I'm currently trying to only update the u-boot.bin part in the
> SPI NOR chip instead of updating the complete ROM (8MiB).
> Updating u-boot.bin (same as u-boot-dtb.bin) at 0x70.0000 results
> in a non booting board though. I've checked a bit and found
> that the U-Boot image in u-boot.rom at this offset differs
> from the original u-boot.bin file. Here a diff:
>
> uboot.test (u-boot.rom at offset 0x70.0000)
> 0000 2D50: 54 2D F0 FF 50 4C F7 FF  00 98 01 00 00 00 F0 FF  T-..PL.. ........
>
> u-boot.bin
> 0000 2D50: 54 2D F0 FF 00 00 00 00  00 00 00 00 00 00 F0 FF  T-...... ........
>
> Do you know why this is the case? I would have expected no
> differences here.

I think this is the microcode pointer (and size).

Regards,
Simon