maemo.org - Talk - Boot the whole system from MMC ?

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Boot the whole system from MMC ?

Hi to everybody.

I was looking around the 770's configuration files when I seen the file

/mnt/initfs/linuxrc

Seems interesting:

Just a piece of the script

Code:

check_partitions()

{

        grep mtdblock4 /proc/partitions >/dev/null

        if [ $? = 0 ] ; then 

                mtd_found=1

        else

                mtd_found=0

        fi



        grep sda1 /proc/partitions >/dev/null

        if [ $? = 0 ] ; then

                sda_found=1

        else

                sda_found=0

        fi



        grep mmc /proc/partitions >/dev/null

        if [ $? = 0 ] ; then

                mmc_found=1

        else

                mmc_found=0

        fi

}

wait_for_device()

{

        complained=0

        while [ true ]; do

                grep $root_dev /proc/partitions > /dev/null

                if [ $? = 0 ]; then

                        break;

                fi

                if [ $complained -ne 1 ]; then

                        echo -n "Waiting for $root_dev_name to become available... "

                        complained=1

                fi

                sleep 1

        done

        if [ $complained -eq 1 ]; then

                echo "found it."

        fi

}



show_roots()

{

        echo "Choose bootup option:"

        if [ $mtd_found -eq 1 ]; then

                echo "  1) Flash"

        fi

        if [ $mmc_found -eq 1 ]; then

                echo "  2) MMC"

        fi

        if [ $sda_found -eq 1 ]; then

                echo "  3) USB Mass Storage Device"

        fi

        echo "  9) Start a shell"

        echo ""

}

The my idea is that there is some kind of switch that allow to choose the boot partition, but I don't know how to trigger the boot menu.

Anyone has some ideas ?

this was already discussed in maemo-developers mailing list
http://www.gossamer-threads.com/list...ot%20mmc;#6042

You need either linux flasher to set boot device (flasher --set-root-device mmc) or set it directly on N770. Try as root 'chroot /mnt/initfs cal-tool'.

Quote:

Originally Posted by fanoush

Thanks for the reply.

My hope is to start with the boot menu rather than switch the boot device "permanently"

BTW there is an other problem I'm with the 2006 OS, but I think that the binarys in the /initfs directory are "old style" binarys and they doesen't work from the command line of a booted system. :(

P.S. apologies for the poor english

Quote:

Originally Posted by The Solutor

My hope is to start with the boot menu rather than switch the boot device "permanently"

yes, you may hope :) But how do you expect to answer the menu?
The menu is useful only for serial console (special cable needed)

Quote:

Originally Posted by The Solutor

BTW there is an other problem I'm with the 2006 OS, but I think that the binarys in the /initfs directory are "old style" binarys and they doesen't work from the command line of a booted system. :(

these are uclibc binaries, use chroot like I suggested, they cannot be executed directly

Quote:

Originally Posted by fanoush

yes, you may hope :) But how do you expect to answer the menu?
The menu is useful only for serial console (special cable needed)

Er... You are (obviously) right :) , a script that ask what to do in the next reboot can be a better choice, isn't it ? ( maybe an hard button driven menu too)