RE: Help needed to understand code

[Shubhangi Jadhav]

Hi,

Could anyone tell me what are the .inc files found in the LinuxBIOS source?
    Are these generated from the C code (for the sdram code I could see an
association between the .c and corresponding .inc) and how ?

Thanks,
Shubhangi

-----Original Message-----
From: steven james [mailto:[e-mail]]
Sent: Friday, March 07, 2003 8:00 PM
To: Shubhangi Jadhav
Cc: [e-mail]
Subject: RE: Help needed to understand code

Greetings,

By chance, are you looking at a snapshot tarball? If so, that's very
old. The best bet is to check out the CVS tree from sourceforge. These
days, intel_main is gone and there's nothing in the chip directory.

G'day,
sjames

On Fri, 7 Mar 2003, Shubhangi Jadhav wrote:
> Hi,
>
> However according to the LinuxBIOS readme the assembly code calls
> intel_main in freebios/chip/intel/intel_main.c which in turn calls
> linuxbios_main in linuxbios/inflate/main.c. So is intel_main called first

or
> hardwaremain. Am I missing something
>    Please elaborate more on the flow.
>
> Thanks,
> Shubhangi
>
> -----Original Message-----
> From: steven james [mailto:[e-mail]]
> Sent: Friday, March 07, 2003 6:29 PM
> To: Shubhangi Jadhav
> Cc: [e-mail]
> Subject: Re: Help needed to understand code
>
> Greetings,
>
> Probably the first thing to understand is the overall flow of control.
>
> On powerup, the reset vector at f000:fff0 jumps to the start of the
> assembly code. The assembly code consists of a series of modular units
> that the config files paste together using include directives. It just
> starts at the beginning, and new pieces are tacked on as encountered in
> the config files. The config files are invoked by directives like
> northbridge and southbridge. The master config file is in the mainboard
> directory and is invoked by the user's config file.  Most mainboard
> directory have example user configs.
>
> The c code is linked together seperatly and then compressed. The last part
> of the asm code decompresses it into RAM and calls hardwaremain
> (found in src/arch/<arch>/lib/hardwaremain.c currently, <arch> can be
> alpha, i386 or ppc). The remainder of the C code is all invoked from
> there.
>
> G'day,
> sjames
>
> On Fri, 7 Mar 2003, Shubhangi Jadhav wrote:
> > Hi,
> >
> > I'm a LinuxBIOS newbie. I have downloaded the source code for the same
>
> and
> > was trying to understand it. Looks too complicated to me.
> >    I'd started with the code for Intel440gx mainboard, but failed to
> > understand how the northbridge and southbridge intialization routines

are
> > invoked.
> >    Can someone tell me how to go about understanding the code?
> >
> > Thanks,
> > Shubhangi
> >
> > Linuxbios mailing list
> > [e-mail]
> > http://www.clustermatic.org/mailman/listinfo/linuxbios
>
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