Help needed to understand code

[steven james]

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:pyro at linuxlabs.com]
> Sent: Friday, March 07, 2003 6:29 PM
> To: Shubhangi Jadhav
> Cc: linuxbios at clustermatic.org
> 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
> > Linuxbios at clustermatic.org
> > http://www.clustermatic.org/mailman/listinfo/linuxbios
> >
> 
> --
> -------------------------steven james, director of research, linux labs
> ... ........ ..... ....                     230 peachtree st nw ste 701
> the original linux labs                             atlanta.ga.us 30303
>       -since 1995                              http://www.linuxlabs.com
>                                    office 404.577.7747 fax 404.577.7743
> -----------------------------------------------------------------------
> 
> 
> _______________________________________________
> Linuxbios mailing list
> Linuxbios at clustermatic.org
> http://www.clustermatic.org/mailman/listinfo/linuxbios
> 

-- 
-------------------------steven james, director of research, linux labs
... ........ ..... ....                     230 peachtree st nw ste 701
the original linux labs                             atlanta.ga.us 30303
      -since 1995                              http://www.linuxlabs.com
                                   office 404.577.7747 fax 404.577.7743
-----------------------------------------------------------------------