Reboot Command Makes kernel to hang (MPC8560)

Ansari ma.harounansari at
Tue Jul 31 17:10:07 EST 2007

Hi Kumar,

First of all thanks for ur reply .

Even i went through the linux source . And i have observe that the reboot 
command used to hard reset the core . I have few doubts can u please clarify 

1. Is there any way to reset the full chip with out using any external 
signal (MPC8560) ? (like any register that can be used for reseting the 
2. Even same reboot command works fine for MPC8540 Processor ?.
3. what are the factors that makes ramdisk hangs . When its uncompressing ?

Haroun Ansari

----- Original Message ----- 
From: "Kumar Gala" <galak at>
To: "Ansari" <ma.harounansari at>
Cc: <linuxppc-embedded at>
Sent: Friday, July 27, 2007 1:21 AM
Subject: Re: Reboot Command Makes kernel to hang (MPC8560)

> On Jul 26, 2007, at 1:55 AM, Ansari wrote:
>> Hi all,
>> Processor (MPC8560)
>> Whenever reboot command is given in the linux console. The  processor 
>> gets reset and it loads bootloader , kernel and when  uncompressing the 
>> ramdisk it gets hang. The sample log is given  below. Any u please tell 
>> me what are the factors that can makes  this to happen.
> This is very board dependant.  The MPC8560 doesn't have a clean way  to 
> request reset, and odds are you're only getting the core reset and  not 
> the full chip.
> - k

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