Linux 2.6.10-rc3 8xx: debugging (over-writing) content of b d_info structure in the kernel booting code

[Povolotsky, Alexander]

also in my  embed_config(bd_t **bdp) function (in
arch/ppc/boot/simple/embed_config.c) I see 
(and use, that is I have ported this from 2.4 to 2.6): 

//      timebase_period_ns = 1000000000 / bd->bi_tbfreq;
        timebase_period_ns = 320;                 // value adjusted by hand

Could anyone knowledgeable make a guess why this was done (on 2.4) and would
it be OK to re-use on 2.6 ?

Thanks,
Alex
-----Original Message-----
From: Povolotsky, Alexander 
Sent: Tuesday, January 18, 2005 2:08 PM
To: 'John W. Linville'
Cc: 'Mark Chambers'; 'linuxppc-embedded at ozlabs.org'; 'Tom Rini'; 'Steven
Blakeslee'
Subject: RE: Linux 2.6.10-rc3 8xx: debugging (over-writing) content of
bd_info structure in the kernel booting code


My board is using:

        bd->bi_intfreq = 50000000;
        bd->bi_busfreq = 50000000;

While RPX-Lite is using

        bd->bi_intfreq = 48000000;
        bd->bi_busfreq = 48000000; 

Is this what makes RPX-Lite work and my (MPC 880) not ?

-----Original Message-----
From: Povolotsky, Alexander 
Sent: Tuesday, January 18, 2005 1:53 PM
To: 'John W. Linville'
Cc: 'Mark Chambers'; 'linuxppc-embedded at ozlabs.org'; 'Tom Rini'; 'Steven
Blakeslee'
Subject: RE: Linux 2.6-10.rc3 8xx: debugging (over-writing) content of b
d_in fo structure in the kernel booting code


The "one, I am using" from my previous e-mail relates to 2.6.10-rc3
My processor is MPC880.
-----Original Message-----
From: Povolotsky, Alexander 
Sent: Tuesday, January 18, 2005 1:19 PM
To: 'John W. Linville'
Cc: 'Mark Chambers'; 'linuxppc-embedded at ozlabs.org'; 'Tom Rini'; 'Steven
Blakeslee'
Subject: RE: Linux 2.6.10-rc3 8xx: debugging (over-writing) content of b
d_in fo structure in the kernel booting code

>Aren't there still generic problems w/ 8xx and 2.6.x?

Allegedly - yes (with memory initialization) but ...
both Tom Rini and Steve Blakeslee were able to boot their 
RPXLite Variant of 8xx on 2.6.10-rc3 (the one I am using)

-----Original Message-----
From: John W. Linville [mailto:linville at tuxdriver.com]
Sent: Tuesday, January 18, 2005 1:11 PM
To: Povolotsky, Alexander
Cc: 'Mark Chambers'; 'linuxppc-embedded at ozlabs.org'
Subject: Re: Linux 2.6.10-rc3 8xx: debugging (over-writing) content of b
d_in fo structure in the kernel booting code


On Tue, Jan 18, 2005 at 10:45:53AM -0500, Povolotsky, Alexander wrote:

> Forgot to mention - this board boots (and works) well with Linux 2.4.26 

Aren't there still generic problems w/ 8xx and 2.6.x?
-- 
John W. Linville
linville at tuxdriver.com