From: Alex BASTOS <alebas@televes•com>
To: Alex BASTOS <alebas@televes•com>
Cc: linuxppc-embedded list <linuxppc-embedded@ozlabs•org>
Subject: Re: pq2_find_bridges hangs system
Date: Wed, 14 Dec 2005 11:21:02 +0100 [thread overview]
Message-ID: <1134555662.439ff20e6e812@webmail.televes.com:443> (raw)
Vitaly,
So, I have arrived to some conclusions.
1) With my previous kernel version (2.6.11) I had no problems
because it had CONFIG_PCI_8260 and CONFIG_PPC_INDIRECT_PCI unset.
So I think no effective read/write operation was executed, and so
that, no Machine Check.
In fact, this is the configuration I would prefer for my board. I have
to set CONFIG_PCI for enabling USB, but I don't want all the HW stuff
of the PCI. I can get these also with 2.6.15 if I modify Kconfig, to
allow me to unset PCI_8260 (and then PPC_INDIRECT_PCI) for my board.
With that, the problem dissapears and I can boot 2.6.15.
Shouldn't this (PCI_8260) be visible from xconfig for those like me
who wants USB (=> CONFIG_PCI) but don't really have any PCI device?
2) Although I am using Uboot 1.1.4, it is not top of git. I have
found your changes to support PCI on 8272ADS for u-boot are not
still applied on the version i am using. So, could this be causing
the problem? Is there any configuration done in u-boot required by
the PCI on the linux kernel to boot (BR3,OR3, EMR, ...)?
I should say that, on ADS, I have an older version of u-boot, 1.1.2,
and it boots OK.
3) I have seen that from u-boot, a reset occurs when I read Internal
Memory at offset 0x10904 (PCI CFG_DATA). From BDI, when I do the same
all PCI section on IM becomes zero. Is this a known behaviour? May this
reflect a hardware problem?
In conclusion, 1) solves my "must", a working board (without PCI).
But I still would like to know what am I doing so wrong with this.
Best regards,
Alex
Citando Alex BASTOS <alebas@televes•com>:
> Vitaly,
>
> It didn't work. So I will check pq2ads_setup_pci to check if
> some board specific issue is affected.
>
> I will say you if I find anything
>
> Thanks
>
> Alex.
>
next reply other threads:[~2005-12-14 9:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-14 10:21 Alex BASTOS [this message]
2005-12-14 11:29 ` pq2_find_bridges hangs system Vitaly Bordug
2005-12-14 14:13 ` [SOLVED] " Alex BASTOS
2005-12-14 14:14 ` Vitaly Bordug
2005-12-14 14:30 ` Kumar Gala
2005-12-15 9:39 ` Alex BASTOS
-- strict thread matches above, loose matches on Subject: below --
2005-12-02 10:51 Alex BASTOS
2005-12-02 10:30 ` Vitaly Bordug
2005-12-02 13:56 ` Alex BASTOS
2005-12-02 14:49 ` Alex BASTOS
2005-12-02 14:55 ` Vitaly Bordug
2005-12-03 17:36 ` Alex BASTOS
2005-12-13 8:24 ` Alex BASTOS
[not found] ` <0IQV004GGIH0UG@mailstore1.hut-mail>
2005-12-02 14:09 ` Kalle Pokki
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