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

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Message-ID: <AANLkTimwU17YS5Yk7y+13Dj9Ww4oPG0g4v5ZbvOVuQV6@mail.gmail.com>
Date:	Tue, 31 Aug 2010 02:02:08 -0400
From:	"Mark F. Brown" <mark.brown314@...il.com>
To:	Eric Miao <eric.y.miao@...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 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.

Regards,
-- Mark
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