Re: kexec on mips - anyone has it working?

From: Tomasz Chmielewski <mangoo@wpkg.org>
To: Nicolas Schichan <nschichan@freebox.fr>
Cc: linux-mips@linux-mips.org, openwrt-devel@lists.openwrt.org,
	Kexec Mailing List <kexec@lists.infradead.org>
Subject: Re: kexec on mips - anyone has it working?
Date: Tue, 01 Jul 2008 19:53:17 +0200	[thread overview]
Message-ID: <486A6F0D.4070802@wpkg.org> (raw)
In-Reply-To: <200807011542.29274.nschichan@freebox.fr>

Nicolas Schichan schrieb:
> On Friday 30 May 2008 13:39:16 Tomasz Chmielewski wrote:
> 
> Hello,
> 
>> Nicolas Schichan schrieb:
>>> On Thursday 29 May 2008 22:15:47 Tomasz Chmielewski wrote:
>>>> Will call new kernel at 00305000
>>> The calling address of the kernel looks quite wrong, it should clearly
>>> be inside the KSEG0 zone. could  you please indicate the output of the
>>> command "mips-linux-readelf -l vmlinux" ?
>> # uname -m
>> mips
>> # readelf -l vmlinux
>>
>> Elf file type is EXEC (Executable file)
>> Entry point 0x80251b50
> 
> This is  quite surprising.   The jump address  that kexec will  use is
> cleary not what  I expected. I would have expected it  to be the Entry
> point address given by readelf.
> 
> could  you try  the  following patch  to  make sure  that the  kimage*
> structure is not corrupted by the code in machine_kexec() ?
> 
> Index: linux/arch/mips/kernel/machine_kexec.c
> ===================================================================
> --- linux/arch/mips/kernel/machine_kexec.c	(revision 8056)
> +++ linux/arch/mips/kernel/machine_kexec.c	(working copy)
> @@ -49,6 +49,8 @@
>  	unsigned long entry;
>  	unsigned long *ptr;
>  
> +	printk("image->start = %p", image->start);
> +
>  	reboot_code_buffer =
>  	  (unsigned long)page_address(image->control_code_page);

Umm?

   CC      arch/mips/kernel/machine_kexec.o
cc1: warnings being treated as errors
arch/mips/kernel/machine_kexec.c: In function 'machine_kexec':
arch/mips/kernel/machine_kexec.c:52: warning: format '%p' expects type 
'void *', but argument 2 has type 'long unsigned int'
make[6]: *** [arch/mips/kernel/machine_kexec.o] Error 1
make[5]: *** [arch/mips/kernel] Error 2
make[5]: Leaving directory 
`/home/tch-data/openwrt/11612/build_dir/linux-brcm47xx/linux-2.6.25.9'

-- 
Tomasz Chmielewski
http://wpkg.org

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