MTD partition help
Alice Hennessy
ahennessy at mvista.com
Wed Apr 24 17:38:58 EDT 2002
Patrik Fuchs wrote:
> Hello!
> I am a complete newbie to this mtd mailing list and its subject.
> I have a AMD flash AM29F040B (512kB, 8 sectors) on a Walnut 405 GP board
> and I want to partition this device. I have Hard Hat Linux 2.4.2 and I boot
> it via PPC boot 1.1.5. In the description from DENX PPC Boot and Linux
> guide they say you have to define the partition in the board-specific
> mapping routines, which can be seen in drivers/mtd/maps/. They took an
> ICU862 board for example:
> Static struct mtd_partition icu862_partitions[] = {
> { name: ?kernel?,
> offset: 0,
> size: 1 << 20,
> },
> {
> },
> .
> .and so on
>
> I cannot find a similar configuration for my Walnut 405 GP board nor do I
> find the maps directory in drivers/mtd. However I´ve found a file in the mtd
> directory named cstm_cfi_jedec.c and I defined the partition there as a fit
> of faintness.
>
> static struct mtd_partition
> cstm_cfi_jedec_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
> {
> /* {
> name: "main partition",
> size: CONFIG_MTD_PHYSMAP_LEN,
> offset: 0,
> },
> */
> { //example
> name: "ppcboot ",
> size: 192 << 10, // 3 Blocks
> offset: 0,
> },
> {
> name: "initrd ", //example
> size: 64 << 10, // 1 Block
> offset: 192 << 10,
> },
> .
> .and so on
>
> But this did not work. Whenever I check the partition using cat /proc/mtd
> I get only this:
> Dev: size erasesize name
> ?and nothing else although there are mtd entries from 0 to9 in the dev
> directory.
> Can someone help me out? Any hints where I am wrong? Thanx in advance
> Patrik
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
What does your cstm_cfi_jedec_board_desc array look like and also
what is PHYSMAP_NUMBER defined as? Do you see any flash related prints
in the bootup?
Alice
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