sharp zaurus: prevent killing spitz-en

sharp zaurus: prevent killing spitz-en

[Pavel Machek]

Hi!

This is wrong solution, but it prevents breaking flashing mechanism on
spitz with too big kernel. It may be handy to someone...

								Pavel

--- clean-rp/arch/arm/boot/Makefile	2004-12-25 13:34:57.000000000 +0100
+++ linux-rp/arch/arm/boot/Makefile	2005-10-25 20:43:58.000000000 +0200
@@ -53,6 +53,12 @@
 $(obj)/zImage:	$(obj)/compressed/vmlinux FORCE
 	$(call if_changed,objcopy)
 	@echo '  Kernel: $@ is ready'
+	@ls -al $@
+	@wc -c $@ | ( read SIZE Y; \
+		if [ $$SIZE -gt 1294336 ]; then \
+			echo '  Kernel is too big, would kill spitz'; \
+			rm $@; \
+		fi )
 
 endif
 



-- 
Thanks, Sharp!

Re: sharp zaurus: prevent killing spitz-en

[Ben Dooks]

On Tue, Oct 25, 2005 at 09:08:29PM +0200, Pavel Machek wrote:
> Hi!
> 
> This is wrong solution, but it prevents breaking flashing mechanism on
> spitz with too big kernel. It may be handy to someone...
> 
> 								Pavel
> 
> --- clean-rp/arch/arm/boot/Makefile	2004-12-25 13:34:57.000000000 +0100
> +++ linux-rp/arch/arm/boot/Makefile	2005-10-25 20:43:58.000000000 +0200
> @@ -53,6 +53,12 @@
>  $(obj)/zImage:	$(obj)/compressed/vmlinux FORCE
>  	$(call if_changed,objcopy)
>  	@echo '  Kernel: $@ is ready'
> +	@ls -al $@
> +	@wc -c $@ | ( read SIZE Y; \
> +		if [ $$SIZE -gt 1294336 ]; then \
> +			echo '  Kernel is too big, would kill spitz'; \
> +			rm $@; \
> +		fi )
>  
>  endif

It would be better for each machine to export an config option
from the Kconfig to specify if they have a maximum size.

-- 
Ben (ben@fluff.org, http://www.fluff.org/)

  'a smiley only costs 4 bytes'

Re: sharp zaurus: prevent killing spitz-en

[Pavel Machek]

Hi!

> > This is wrong solution, but it prevents breaking flashing mechanism on
> > spitz with too big kernel. It may be handy to someone...
> > 
> > 								Pavel
> > 
> > --- clean-rp/arch/arm/boot/Makefile	2004-12-25 13:34:57.000000000 +0100
> > +++ linux-rp/arch/arm/boot/Makefile	2005-10-25 20:43:58.000000000 +0200
> > @@ -53,6 +53,12 @@
> >  $(obj)/zImage:	$(obj)/compressed/vmlinux FORCE
> >  	$(call if_changed,objcopy)
> >  	@echo '  Kernel: $@ is ready'
> > +	@ls -al $@
> > +	@wc -c $@ | ( read SIZE Y; \
> > +		if [ $$SIZE -gt 1294336 ]; then \
> > +			echo '  Kernel is too big, would kill spitz'; \
> > +			rm $@; \
> > +		fi )
> >  
> >  endif
> 
> It would be better for each machine to export an config option
> from the Kconfig to specify if they have a maximum size.

It is probably best to stop it at the flasher script, but ... this was
quite a quick hack.
							Pavel
-- 
Thanks, Sharp!

Re: sharp zaurus: prevent killing spitz-en

[David Vrabel]

Ben Dooks wrote:
> 
> It would be better for each machine to export an config option
> from the Kconfig to specify if they have a maximum size.

Isn't the maximum size a property of the bootloader/other firmware? 
i.e., something the kernel build system knows nothing about.

David Vrabel

Re: sharp zaurus: prevent killing spitz-en

[Russell King]

On Wed, Oct 26, 2005 at 12:18:46AM +0100, David Vrabel wrote:
> Ben Dooks wrote:
> >It would be better for each machine to export an config option
> >from the Kconfig to specify if they have a maximum size.
> 
> Isn't the maximum size a property of the bootloader/other firmware? 
> i.e., something the kernel build system knows nothing about.

Yes.  blob, for instance, aborts an xmodem download if it's too large.
The kernel has no knowledge of what blob classifies as "too large"
which may indeed be different from uboot, bootldr, redboot, or ...

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core