linux-kernel - Re: [PATCH 1/1] ARM: pxa168: fix corrected reset vector

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Message-ID: <AANLkTikxOQnj=vKD8b0aZqZHNe4m-Y+o+620TBzMJCAW@mail.gmail.com>
Date:	Tue, 31 Aug 2010 14:04:13 +0800
From:	Eric Miao <eric.y.miao@...il.com>
To:	"Mark F. Brown" <mark.brown314@...il.com>
Cc:	Haojian Zhuang <haojian.zhuang@...vell.com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] ARM: pxa168: fix corrected reset vector

On Tue, Aug 31, 2010 at 2:02 PM, Mark F. Brown <mark.brown314@...il.com> wrote:
> On Tue, Aug 31, 2010 at 1:48 AM, Eric Miao <eric.y.miao@...il.com> wrote:
>> On Thu, Aug 26, 2010 at 5:07 PM, Mark F. Brown <mark.brown314@...il.com> wrote:
>>> Signed-off-by: Mark F. Brown <mark.brown314@...il.com>
>>> ---
>>>  arch/arm/mach-mmp/include/mach/system.h |    2 +-
>>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>>
>>> diff --git a/arch/arm/mach-mmp/include/mach/system.h b/arch/arm/mach-mmp/include/mach/system.h
>>> index 4f5b0e0..926e9c0 100644
>>> --- a/arch/arm/mach-mmp/include/mach/system.h
>>> +++ b/arch/arm/mach-mmp/include/mach/system.h
>>> @@ -16,6 +16,6 @@ static inline void arch_idle(void)
>>>
>>>  static inline void arch_reset(char mode, const char *cmd)
>>>  {
>>> -       cpu_reset(0);
>>> +       cpu_reset(0xffff0000);
>>
>> Not sure if this correct. But normally reset jump happens after we turn
>> off the MMU and so on. Ain't the BootROM starts from 0 ?
>>
>>>  }
>>>  #endif /* __ASM_MACH_SYSTEM_H */
>>> --
>>> 1.7.0.4
>>>
>>>
>>
>
> Eric, the boot-rom for pxa168 starts at 0xffff_0000. I am pretty sure
> about that! If you set the reset vector to 0x0 it will crash during
> reboot. I will send you xdb snapshots if you need me to.
>

OK, you are expert on this :-)

Applied to 'fix'.
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