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From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: reboot not working on linux-2.6.37 for ARMv7
Date: Fri, 11 Feb 2011 12:03:05 +0000	[thread overview]
Message-ID: <20110211120305.GD23404@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <AANLkTi=FCJr-0aF0LG92PC4Q7J4R5PDU7xobnvCgDHy8@mail.gmail.com>

On Fri, Feb 11, 2011 at 05:01:06PM +0530, shiraz hashim wrote:
> Hi,
> 
> I am using linux-2.6.37 on our ARM Cortex A9 (dual core) SMP platform
> with PL310 as Level 2 cache. We observe that on reboot the control
> is not able to reach to the arch_reset.
> 
> The problem happens when L1 cache is disabled in
> arm_machine_restart, through cpu_proc_fin() and L2 cache is flushed.

Where's the L2 cache flush?  The sequence is:

        /* Clean and invalidate caches */
        flush_cache_all();
        /* Turn off caching */
        cpu_proc_fin();
        /* Push out any further dirty data, and ensure cache is empty */
        flush_cache_all();

and flush_cache_all() calls v7_flush_kern_cache_all() in
arch/arm/mm/cache-v7.S.

I do hope you're not modifying flush_cache_all() to also call the L2
cache functions because that's wrong.

  reply	other threads:[~2011-02-11 12:03 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-11 11:31 reboot not working on linux-2.6.37 for ARMv7 shiraz hashim
2011-02-11 12:03 ` Russell King - ARM Linux [this message]
2011-02-11 12:10   ` Santosh Shilimkar
2011-02-11 12:20     ` Russell King - ARM Linux
2011-02-11 12:23       ` Santosh Shilimkar
2011-02-12 16:15   ` viresh kumar
2011-02-12 16:21     ` Russell King - ARM Linux
2011-02-12 17:23       ` shiraz hashim
2011-02-12 17:32         ` Russell King - ARM Linux
2011-02-12 17:37           ` shiraz hashim
2011-02-13  3:56     ` Rabin Vincent
2011-02-14  3:37       ` shiraz hashim

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