In message [off-list ref] you wrote:
My flash is 16M that is mapping on 0xFF000000-0xFFFFFFFF.
mtd0: 0xFF000000-0xFF1FFFFF Kernel
mtd1: 0xFF200000-0xFF9FFFFF RootFS
mtd2: 0xFFA00000-0xFFAFFFFF Config
mtd3: 0xFFF00000-0xFFFFFFFF U-Boot
Now I can build an image for mtd device, for example, dd if=/dev/mtd0
of=kernel.img.
If you want to copy the image to flash, you got the parameters wrong,
i. e. you must use
dd if=kernel.img of=/dev/mtd0
(after erasing /dev/mtd0, of course); and using some bs= option may
speed up the prcedure a bit, too.
But I don't know how to build a image for whole flash ?
What do you mean "for the whole flash"? If you cant to combine the 4
images into one big blob you can do so by (1) padding the images to
the full size of each partition; this can be done using appropriate
"bs=", "count=" and "conv=sync" parameters to dd; and (2)
concatenating the images using "cat".
But this is a prtty inefficient way, and you will also have to change
your MTD partitioning to provide a big partition which covers the
whole flash.
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Some people march to the beat of a different drummer. And some people
tango!
Yes. I add a MTD partition which include whole flash as following:
mtd0: 0xFF000000-0xFF1FFFFF Kernel
mtd1: 0xFF200000-0xFF9FFFFF RootFS
mtd2: 0xFFA00000-0xFFAFFFFF Config
mtd3: 0xFFF00000-0xFFFFFFFF U-Boot
mtd4: 0xFF000000-0xFFFFFFFF Flash
then "dd if=/dev/mtd4 of=flash.img".
Bu t I think it's not a good idea.
Thanks,
Johnson Cheng
-----Original Message-----
From: wd@denx.de [mailto:wd@denx.de]
Sent: Thursday, August 25, 2005 3:29 PM
To: JohnsonCheng
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: How to build an image for whole flash
In message [off-list ref] you wrote:
My flash is 16M that is mapping on 0xFF000000-0xFFFFFFFF.
mtd0: 0xFF000000-0xFF1FFFFF Kernel
mtd1: 0xFF200000-0xFF9FFFFF RootFS
mtd2: 0xFFA00000-0xFFAFFFFF Config
mtd3: 0xFFF00000-0xFFFFFFFF U-Boot
Now I can build an image for mtd device, for example, dd if=/dev/mtd0
of=kernel.img.
If you want to copy the image to flash, you got the parameters wrong,
i. e. you must use
dd if=kernel.img of=/dev/mtd0
(after erasing /dev/mtd0, of course); and using some bs= option may
speed up the prcedure a bit, too.
But I don't know how to build a image for whole flash ?
What do you mean "for the whole flash"? If you cant to combine the 4
images into one big blob you can do so by (1) padding the images to
the full size of each partition; this can be done using appropriate
"bs=", "count=" and "conv=sync" parameters to dd; and (2)
concatenating the images using "cat".
But this is a prtty inefficient way, and you will also have to change
your MTD partitioning to provide a big partition which covers the
whole flash.
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Some people march to the beat of a different drummer. And some people
tango!