[coreboot] On loongson CPU or MIPS ARCH

[Paul Menzel]

Dear Guang,


Am Montag, den 29.04.2013, 16:56 +0800 schrieb li guang:

> 在 2013-04-29一的 10:47 +0200，Paul Menzel写道：
> > Am Montag, den 29.04.2013, 10:19 +0200 schrieb Paul Menzel:
> > > Am Sonntag, den 28.04.2013, 20:21 -0700 schrieb ron minnich:
> > > > On Sun, Apr 28, 2013 at 7:24 PM, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> > > > 
> > > > > Could we have a sane discussion about why it's not suitable for this or
> > > > > that scenario and what would need to be fixed? Not just quasi-fanatical
> > > > > "I don't want it".
> > > > 
> > > > I guess I missed the part where not wanting something was considered insane.
> > > 
> > > […]
> > > 
> > > Could you all please read what Vladimir actually wrote and not put
> > > something in his mouth!
> > > 
> > > »You need something as GRUB for it since the chip is too small
> > > to hold a kernel anyway.«
> > > 
> > > The »something« makes a difference.
> > > 
> > > He just informed Guang, that he needs a payload, which Guang did not
> > > consider yet. As Vladimir already knows coreboot due to his X201s work
> > > and dealt with Loongson I find it very nice of him to share his opinion.
> > 
> > Guang, from all of the respondents I probably are the most inexperienced
> > one, so my answers might be incorrect. One of the strong points of
> > coreboot is its PCI initialization framework, the ability to configure
> > it with Kconfig and the ability to customize it 
> 
> Loongson platform be designed mostly like a PC, it also control PCI
> devices.
> 
> > because of the payload
> > concept, where coreboot only initializes only the minimum of the
> > hardware and a payload, like SeaBIOS, FILO and GRUB, can take over.
> 
> I'm not quite clear about code flow between bootblock and payload
> for now, so, is there some document about it?

coreboot has its own filesystem for the ROM called CBFS (coreboot
filesystem). If I am right, coreboot by default loads the file
`fallback/payload` stored in there and jumps to it/executes it [1].

> or can you give some hints for code flow?
> Thanks!

Some talks about coreboot were recorded. Peter Stuge’s talk »2008/12/27
coreboot at 25C3 in Berlin, Germany« linked from [2] is often
recommended to watch to get an overview.

[…]


Thanks,

Paul


[1] http://www.coreboot.org/Payloads
[2] http://www.coreboot.org/News
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