Boot from SD/MMC
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(Created page with '__TOC__ =Boot from SD/MMC= ==Creating a Boot-able Filesystem on the SD card== 1) The first step is to make a bootable file system on the SD card. Insert the card into the slot of…') |
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This is the line that you'll need to change. Change it to | This is the line that you'll need to change. Change it to | ||
| - | Electrum>> setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p1 rw ip=192.168.1.231:192.168.1.249::255.255.255.0::eth0:none | + | Electrum>> setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p1 rw ip=192.168.1.231:192.168.1.249::255.255.255.0:: |
| + | eth0:none | ||
Electrum>> printenv bootargs (if you like, just to confirm that you did it right) | Electrum>> printenv bootargs (if you like, just to confirm that you did it right) | ||
Electrum>> boot | Electrum>> boot | ||
Revision as of 13:19, 17 June 2010
Contents |
Boot from SD/MMC
Creating a Boot-able Filesystem on the SD card
1) The first step is to make a bootable file system on the SD card. Insert the card into the slot of a running plug. Enter the following commands:
>fdisk /dev/mmcblk0 press "o" / create a new partition table press "n" / create a new partition press "p" / it's a primary partition press "1" / partition #1 press enter / default first cylinder press enter / default last cylinder press "a" / set the boot flag press "1" / ... for partition #1 press "w" / save changes >mkfs -t ext2 /dev/mmcblk0p1 >mkdir /mnt/sdcard >mount /dev/mmcblk0p1 /mnt/sdcard >df
2) Now copy your existing nand file system onto the sd card. This may take 5-10 minutes.
root#: cp -r /rootfs/* /mnt/sdcard
3) The SD card should now mirror your internal nand flash, which you can confirm with df -h, etc.
Filesystem 1K-blocks Used Available Use% Mounted on rootfs 519168 185612 333556 36% / tmpfs 257816 0 257816 0% /lib/init/rw varrun 257816 260 257556 1% /var/run varlock 257816 0 257816 0% /var/lock udev 257816 12 257804 1% /dev tmpfs 257816 0 257816 0% /dev/shm tmpfs 257816 21824 235992 9% /var/cache/apt /dev/mmcblk0p1 7707056 516216 6799340 8% /mnt/sdcard
your SD card now has a bootable system. The next step is to boot it.
Booting from the SD Card
You need to interact with u-boot now. You must do this from a program talking to the usb-serial port, not from an ssh shell (duh).
>shutdown -r now
When u-boot appears, stop it by typing ENTER a few times, to stop it from booting automatically.
Electrum>> printenv bootargs bootargs console=ttyS0,115200 root=/dev/nfs rw ip=192.168.1.231:192.168.1.249::255.255.255.0:: eth0: nfsroot=192.168.1.249:/media/disk/rootfs
This is the line that you'll need to change. Change it to
Electrum>> setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p1 rw ip=192.168.1.231:192.168.1.249::255.255.255.0:: eth0:none Electrum>> printenv bootargs (if you like, just to confirm that you did it right) Electrum>> boot