This is the mail archive of the ecos-discuss@sourceware.org mailing list for the eCos project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: moving RedBoot config from one device to another - is "dd" enough?


Tomasz Chmielewski wrote:
I have a device, that has these partitions:

Creating 5 MTD partitions on "IXP4XX-Flash.0":
0x00000000-0x00040000 : "RedBoot"
0x00080000-0x00200000 : "kern1"
0x00200000-0x00380000 : "kern2"
0x003c0000-0x003e0000 : "RedBoot config"
0x003e0000-0x00400000 : "FIS directory"

and by default it starts Linux like below:

RedBoot> fis load kern1
RedBoot> exec -c "console=ttyS0,115200 root=/dev/hda1"


I made a new kernel, and wrote it to "kern2" partition, and start it like that:


RedBoot> fis load kern2
RedBoot> exec


To do such changes in RedBoot, I have to unscrew/open the device, connect a serial port to the device, and use "fconfig" to make the changes.



Now, I have to replicate this change to dozens of other devices.


As a human being is a lazy creature, I believe there is an easier way to do it than a boring opening the device, connecting a serial port, "fconfig" to make RedBoot changes etc.


So let's say I have a "master" device (properly configured), and the devices I need to reconfigure.


If I do this on a "master" device (Linux already started):

# /dev/mtd3 is a "RedBoot config" partition
dd if=/dev/mtd3 of=new-redboot-config


And then, on the devices I want to reconfigure (Linux already started):


dd if=new-redboot-config of=/dev/mtd3


Will this work properly? Will the new device have its starting sequence changed to:


RedBoot> fis load kern2
RedBoot> exec

?

Perhaps, I should use something like "erase /dev/mtd3 0 12 1" first?


The basic concept is O.K. Im not familiar with mtd, so i've no idea if you need to erase the block first, or if writing to it will automagically erase it.

Andrew

--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]