[Buildroot] Compile Linux with Buildroot for i.MX28 EVK

Fri Feb 24 17:10:04 UTC 2012

On Fri February 24 2012, Mikael Åsberg wrote:
> 
> This application is for the automotive industry. In a car, the embedded system 
> must be able to boot within maximum ~1 second. I was thinking, can I use mkimage 
> to convert vmlinux to an uImage (uncompressed version)?  
> Or, is there a setting in Buildroot or Barebox where I can specify the builder 
> to not compress the uImage? 
> 

A better solution -
Put your device to sleep (suspend to ram).
It can __resume__ in less than 1 sec.
It only needs to __re-boot__ after loss of battery power (rare).

Mike
> --------------------------------------------------------------
> Mikael Åsberg
> PhD student (Doktorand), Computer Engineering
> School of Innovation, Design and Engineering
> Mälardalen University, Västerås Sweden
> Phone: +46(0)21 101502
> Room nr: U1-145
> Mail: mikael.asberg at mdh.se
> --------------------------------------------------------------
> ________________________________________
> Från: Yegor Yefremov [yegorslists at googlemail.com]
> Skickat: den 24 februari 2012 16:10
> Till: Mikael Åsberg
> Kopia: buildroot at busybox.net
> Ämne: Re: [Buildroot] Compile Linux with Buildroot for i.MX28 EVK
> 
> I don't know, if it is possible to pack vmlinuz in uImage. Why do you need this?
> 
> On Fri, Feb 24, 2012 at 3:33 PM, Mikael Åsberg <mikael.asberg at mdh.se> wrote:
> >
> > Ahh ok. Do you know how to create an uImage which is not compressed?
> >
> > --------------------------------------------------------------
> > Mikael Åsberg
> > PhD student (Doktorand), Computer Engineering
> > School of Innovation, Design and Engineering
> > Mälardalen University, Västerås Sweden
> > Phone: +46(0)21 101502
> > Room nr: U1-145
> > Mail: mikael.asberg at mdh.se
> > --------------------------------------------------------------
> > ________________________________________
> > Från: Yegor Yefremov [yegorslists at googlemail.com]
> > Skickat: den 24 februari 2012 15:06
> > Till: Mikael Åsberg
> > Kopia: buildroot at busybox.net
> > Ämne: Re: [Buildroot] Compile Linux with Buildroot for i.MX28 EVK
> >
> > This is zImage with u-boot specific wrapper. uImage will be created
> > from zImage using mkimage tool.
> >
> > Yegor
> >
> > On Fri, Feb 24, 2012 at 2:53 PM, Mikael Åsberg <mikael.asberg at mdh.se> wrote:
> >> Hi,
> >>
> >> Ok, but is uImage a compressed file like zImage? If yes, can I de-compress it somehow?
> >>
> >> Regards
> >>
> >> --------------------------------------------------------------
> >> Mikael Åsberg
> >> PhD student (Doktorand), Computer Engineering
> >> School of Innovation, Design and Engineering
> >> Mälardalen University, Västerås Sweden
> >> Phone: +46(0)21 101502
> >> Room nr: U1-145
> >> Mail: mikael.asberg at mdh.se
> >> --------------------------------------------------------------
> >> ________________________________________
> >> Från: Yegor Yefremov [yegorslists at googlemail.com]
> >> Skickat: den 24 februari 2012 14:33
> >> Till: Mikael Åsberg
> >> Kopia: Baruch Siach; buildroot at busybox.net
> >> Ämne: Re: [Buildroot] Compile Linux with Buildroot for i.MX28 EVK
> >>
> >> AFAIK it is always uImage format for both u-boot and barebox. RedBoot
> >> has used zImage.
> >>
> >> Yegor
> >>
> >> On Fri, Feb 24, 2012 at 2:19 PM, Mikael Åsberg <mikael.asberg at mdh.se> wrote:
> >>> Hey,
> >>>
> >>> Ok great, thx!
> >>>
> >>> One last thing, depending on which bootloader that is used, i.e., u-boot, barebox etc., does it matter which kernel image that is used for the boot (zImage, uImage, vmlinux)?
> >>> If I use barebox, which image can I use? (I prefer an uncompressed kernel)
> >>>
> >>> Kind regards
> >>>
> >>> --------------------------------------------------------------
> >>> Mikael Åsberg
> >>> PhD student (Doktorand), Computer Engineering
> >>> School of Innovation, Design and Engineering
> >>> Mälardalen University, Västerås Sweden
> >>> Phone: +46(0)21 101502
> >>> Room nr: U1-145
> >>> Mail: mikael.asberg at mdh.se
> >>> --------------------------------------------------------------
> >>> ________________________________________
> >>> Från: Baruch Siach [baruch at tkos.co.il]
> >>> Skickat: den 23 februari 2012 18:17
> >>> Till: Mikael Åsberg
> >>> Kopia: buildroot at busybox.net
> >>> Ämne: Re: SV: [Buildroot] Compile Linux with Buildroot for i.MX28 EVK
> >>>
> >>> Hi Mikael,
> >>>
> >>> Please keep the list in Cc.
> >>>
> >>> On Thu, Feb 23, 2012 at 02:35:37PM +0100, Mikael Åsberg wrote:
> >>>> Hi,
> >>>>
> >>>> Thanks a lot for the info!
> >>>>
> >>>> I guess its easier to use Barebox, then you just also specify mxs_defconfig
> >>>> when you configure.
> >>>
> >>> You original question was about the Linux kernel not Barebox.
> >>>
> >>> Barebox includes support for the TX28 board which is based on i.MX28
> >>> (tx28stk5_defconfig).
> >>>
> >>>> One more thing, since i.MX28 uses the "454MHz ARM926EJ-S" processor, should
> >>>> I choose "arm926t" in the config?
> >>>
> >>> The kernel (and Barebox) defconfig files should include all the relevant
> >>> settings, including this one.
> >>>
> >>> baruch
> >>>
> >>>> Från: Baruch Siach [baruch at tkos.co.il]
> >>>> Skickat: den 23 februari 2012 13:38
> >>>> Till: Mikael Åsberg
> >>>> Kopia: buildroot at busybox.net
> >>>> Ämne: Re: [Buildroot] Compile Linux with Buildroot for i.MX28 EVK
> >>>>
> >>>> Hi Mikael,
> >>>>
> >>>> On Thu, Feb 23, 2012 at 12:22:09PM +0100, Mikael Åsberg wrote:
> >>>> > Does anyone have experience with compiling Linux kernels with Buildroot for
> >>>> > i.MX28 EVK?
> >>>> > I'm not sure which board name to be set for u-boot for example...
> >>>> > Also, which defconfig should be used, imx27ads_defconfig or versatile_defconfig perhaps?
> >>>> >
> >>>> > Any help or pointers would be valueable!
> >>>>
> >>>> Although it's named i.MX28, this chip is very different from i.MX27, but is
> >>>> similar to i.MX23. Latest kernels (since v3.0) contain mxs_defconfig, which
> >>>> should be suitable for i.MX28 (and i.MX23).
> >>>>
> >>>> baruch
> >>>
> >>> --
> >>>     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
> >>> =}------------------------------------------------ooO--U--Ooo------------{=
> >>>   - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
> >>> _______________________________________________
> >>> buildroot mailing list
> >>> buildroot at busybox.net
> >>> http://lists.busybox.net/mailman/listinfo/buildroot
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