Re: Status of Kexec? (problem in sh3)

[Rafael I. Z. <riz...@ya...>]

Hello Paul,

--- Paul Mundt <le...@li...> wrote:
> On Wed, Oct 10, 2007 at 08:28:01AM -0700, Rafael
> Ignacio Zurita wrote:
> >   I was trying kexec in sh3 ... But it
> > gets
> > frozen when run "kexec -e". I would wish to know
> > what might be the issue.
> > 
> kexec has not had any testing on SH-3 that I know
> of, so there are bound
> to be bugs.
> 
> This comes from kexec_info(), the next step after
> this is the cache flush
> and then jumping in to the new code. Thinking about
> this a bit,
> flush_cache_all() on that particular SH-3 is a
> no-op, so you may have to
> explicitly purge the region before doing the jump.
> 
> How does something like this work?

No luck... I applied the patch, but it gave me
the same system frozen after "kexec -e".
If you need some useful information to help with
this problem i will test.

Thanks in advance,
Rafael


> diff --git a/arch/sh/kernel/machine_kexec.c
> b/arch/sh/kernel/machine_kexec.c
> index 5c17de5..ffd02b3 100644
> --- a/arch/sh/kernel/machine_kexec.c
> +++ b/arch/sh/kernel/machine_kexec.c
> @@ -97,7 +97,8 @@ NORET_TYPE void
> machine_kexec(struct kimage *image)
>  					relocate_new_kernel_size);
>  
>          kexec_info(image);
> -	flush_cache_all();
> +	__flush_purge_region((void *)reboot_code_buffer,
> +			     relocate_new_kernel_size);
>  
>  	/* now call it */
>  	rnk = (relocate_new_kernel_t) reboot_code_buffer;
> 


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