[U-Boot] uImage load address and entry point with Minnowboard

[Robert P. J. Day]

On Fri, 24 Jun 2016, Wolfgang Denk wrote:

> Dear Vinoth,
>
> In message <CAJst-kFZjA_Nq7K25CEPri9Aq7r=-mmtGyeNYwwg-P2CrN4dbA at mail.gmail.com> you wrote:
> >
> > I am using the following command to create uImage. Here in the architecture
> > argument I am not seeing any option corresponding to the Intel-x86_64. So I
> > had used x86, which I am not sure is valid or not. The kernel is 64 bit.
> >
> > mkimage -A x86 -O linux -T kernel -C none -a 0x100000 -e 0x00000 -n Linux
> > -d vmlinux-4.4.6-ina uImage
> > Image Name:   Linux
> > Created:      Fri Jun 24 10:35:40 2016
> > Image Type:   Intel x86 Linux Kernel Image (uncompressed)
> > Data Size:    21966248 Bytes = 21451.41 kB = 20.95 MB
> > Load Address: 00100000
> > Entry Point:  00000000
>
> This makes no sense to me.  When the kernel image is loaded to RAM
> starting at address 0x00100000, then ther eis no valid code at address
> 0x00000000.  So 0x00000000 cannot be a valid entry oint address.  The
> entry point address must be somewhare in the range between "load
> address" and "load address + size of uncompressed kernel image".
>
> > Error: Invalid Boot Flag (found 0x0000, expected 0xaa55)
> > Setup at 0x000000
> > Magic signature not found
> >
> > Is is I need to load setup.bin also?

  i'm sure i'm not adding much to this discussion, but 0xaa55 is the
last two bytes of an MBR that identifies that 512-byte block as a
legitimate master boot record, so *something* is looking for an MBR
and not finding it.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
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