Re: [ts-7000] Install a kernel in a TS-7400

>But first I want to be sure that I will be able to recover the old kernel if 
>the 
>new one fails. So my questions are:
>
>- Anyone knows how to read the old kernel?

Here is what I did on my TS-7260.  If your board also uses RedBoot, it
should work pretty much the same way.

Do not delete the old kernel.  Just use a different name.  (There is
nothing special about the name "vmlinux".)


On my development system, "make" produces vmlinux.bin which I copy to
my web server.  (I find it easier to use a web server than TFTP server,
but it should work either way.)  To test the new kernel, I type control-C
when the board is booting, then enter the commands

        load -v -r -b 0x00218000 -m http -h 192.168.1.1 /vmlinux.bin
        exec -c "console=ttyAM0,115200 root=/dev/mtdblock1"

This runs my kernel for testing purposes, but still uses the on-board
flash for a root filesystem .

After several iterations of building and testing the kernel, I decided I
was ready to save the kernel to the flash memory.  I used this sequence
of commands:

        --> make sure the flash write-enable jumper is present. 
        --> "fis create" fails silently if the flash is write protected.

        load -v -r -b 0x00218000 -m http -h 192.168.1.1 /vmlinux.bin
                (loads kernel into memory, just like you mean to run it)

        fis create -b 0x218000 -l IMG_LEN KERNELNAME
                ( Obtain IMG_LEN from "ls -l vmlinux.bin" on your web server.
                The "load" command told you the start and end address, but
                -l needs the length.  You can type a decimal number there,
                so you can just cut/paste from ls -l output.)

        fis list
                (now you see both the original vmlinux and your new kernel)

To run the new kernel,

        fis load KERNELNAME
        exec -c "console=ttyAM0,115200 root=/dev/mtdblock1"

To run the old kernel

        fis load vmlinux
        exec -c "console=ttyAM0,115200 root=/dev/mtdblock1"

Of course, you can use
        fconfig
to change which of those commands happens automatically.

Differences from your configuration:
- I am using -ts10 kernel because it was the latest on my CD
- I have the 7260, not 7400
- I only get vmlinux.bin, not zImage when I compile the kernel

Mark S.



 
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