Re: [PATCH] [ARM] Enable boot module for arm

[Andrey Borzenkov <arvidjaar@gmail.com> (by way of Andrey Borzenkov <arvidjaar@gmail.com>)]

В Sun, 28 Jul 2013 22:18:41 +0400
Andrey Borzenkov <arvidjaar@gmail.com> пишет:

> В Sun, 28 Jul 2013 20:01:29 +0200
> Vladimir 'φ-coder/phcoder' Serbinenko <phcoder@gmail.com> пишет:
> 
> > On 28.07.2013 18:51, Andrey Borzenkov wrote:
> > >     Load Address: 08000000
> > >     Entry Point:  08000000
> > This obviously can't work if this address is unavailable. You need to 
> > change linking address.
> > 
> 
> If you know which value it needs to have, you could just tell ...
> 
> Anyway the problem was that GRUB uboot code depends on U-Boot providing
> API, and as it turned out it is optional (and not default). After
> rebuilding U-Boot with CONFIG_API I now get
> 
> VersatilePB # bootm 0x2F7CC
> ## Current stack ends at 0x07facae8 *  kernel: cmdline image address = 0x0002f7cc
> ## Booting kernel from Legacy Image at 0002f7cc ...
>    Image Name:   
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    94184 Bytes = 92 KiB
>    Load Address: 08000000
>    Entry Point:  08000000
>    kernel data at 0x0002f80c, len = 0x00016fe8 (94184)
> ## No init Ramdisk
>    ramdisk start = 0x00000000, ramdisk end = 0x00000000
>    Loading Kernel Image ... OK
> OK
>    kernel loaded at 0x08000000, end = 0x08016fe8
> using: ATAGS
> ## Transferring control to Linux (at address 08000000)...
> 
> Starting kernel ...
> 
> Welcome to GRUB!
> 
> error: variable `root' isn't set.
> Entering rescue mode...
> grub rescue> 

Unfortunately attempt to do anything more useful ended up in

Starting kernel ...

Welcome to GRUB!

Unsupported ARM ID 0x41069265
Aborted. Press any key to exit.resetting ...

Which makes sense as we do not have any cache implementation for
ARMv5 ... sigh, all other platforms listed by QEMU I tried would not
even run U-Boot (at least, would not produce any output on serial
console).