Hi Igor,
On Tue, Aug 11, 2015 at 9:18 PM, Stoppa, Igor igor.stoppa@intel.com wrote:
Hello,
I have read the documentation coming with u-boot and several other links that I got from Google, but I am still confused on certain items.
I'll gladly provide patches for enhancing the documentation, if anyone can help me to understand better.
My impression is that the typical way of running u-boot in non-EFI mode is to create its raw version. Because the alternative is to build u-boot as coreboot payload, but not many target HW use coreboot. Is this correct?
U-Boot supports running bare-metal as well as being loaded as a coreboot payload. For the base-metal case, U-Boot is the actual BIOS which boots from the x86 reset vector.
Googling, I found this link [1] from the qemu ml archives, which shows how to build and start a u-boot rom file in qemu. Which works also for me.
This is documented in README.x86 @ http://git.denx.de/?p=u-boot.git;a=blob;f=doc/README.x86;h=af2459c7ed6af55d9...
However I would like to create a loop file, install u-boot in it and pass that file to qemu as hda, rather than using the rom file.
Why do you want to do this way? U-Boot does not support this use case so far.
How do I install u-boot? From what I understood I should put something in the (disk? / partition?) MBR and copy something else elsewhere.
But I could not figure out what goes where, exactly. Could anybody please enlighten me?
As mentioned above, this is not supported. But if you can figure it out, patches are welcome :-)
[1] https://lists.gnu.org/archive/html/qemu-devel/2015-05/msg04835.html
Regards, Bin