From: Ralf Baechle <ralf@linux-mips.org>
To: "wilbur.chan" <wilbur512@gmail.com>
Cc: Linux MIPS Mailing List <linux-mips@linux-mips.org>
Subject: Re: Problem in booting when calling calibrate_delay
Date: Sun, 1 Nov 2009 08:14:07 +0100 [thread overview]
Message-ID: <20091101071407.GC4551@linux-mips.org> (raw)
In-Reply-To: <e997b7420910281651p24b8e367m1e2ddbc1b95ac623@mail.gmail.com>
On Thu, Oct 29, 2009 at 07:51:52AM +0800, wilbur.chan wrote:
> I was going to boot mips64 xlr408, which has 8 cores.
The XLR is not supported by the linux-mips.org rsp. kernel.org kernel
trees.
> Howerver, the code seemd to stop before calling 'start_kernel--->
>
> calibrate_delay ' .
>
> So Iadded some 'printk' in calibrate_delay, to check out why it failed.
> However, if I added a 'printk' in any 'if branches' in
>
> 'calibrate_delay ' function , the kernel would halt before calling
>
>
> 'j start_kernel' in head.S. (in this situation ,printk seemed
>
> unavailable, so I wrote directlly to serial address to trace the
>
> kernel).
>
>
> Can anyone tell me why this happed?
When something like this happens it is in most cases caused by timer
interrupt not working.
Ralf
next prev parent reply other threads:[~2009-11-01 7:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-28 23:51 Problem in booting when calling calibrate_delay wilbur.chan
2009-11-01 7:14 ` Ralf Baechle [this message]
2009-11-01 15:18 ` wilbur.chan
2009-11-02 15:12 ` wilbur.chan
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