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[microblaze-uclinux] creating a flash partition
I have a Spartan3E-1600 dev board that I'm trying to create a flash disk
on. By "flash disk" I mean jffs2 mounted on a flash partition so I can
have persistent config files and such.
Initially, I have this:
# more /proc/mtd
dev: size erasesize name
mtd0: 00161000 00001000 "ROMfs"
# more /proc/partitions
major minor #blocks name
31 0 1412 mtdblock0
u-boot tells me this:
U-Boot> flinfo
Bank # 1: CFI conformant FLASH (8 x 8) Size: 16 MB in 128 Sectors
Erase timeout 4096 ms, write timeout 1 ms, buffer write timeout 2 ms,
buffer size 32
Sector Start Addresses:
21000000 21020000 21040000 21060000 21080000
210A0000 210C0000 210E0000 21100000 (RO) 21120000 (RO)
21140000 21160000 21180000 211A0000 211C0000
211E0000 21200000 21220000 21240000 21260000
21280000 212A0000 212C0000 212E0000 21300000
etc...
For some reason I have 15 MTD devices (is this the default with petalinux?):
# ls /dev
console mtd6 mtdblock7 mtdr8 ptypc ttyp5
fb0 mtd7 mtdblock8 mtdr9 ptypd ttyp6
flash mtd8 mtdblock9 null ptype ttyp7
kmem mtd9 mtdr0 nvram ptypf ttyp8
mem mtdblock0 mtdr1 ptyp0 random ttyp9
mtd0 mtdblock1 mtdr10 ptyp1 rtc ttypa
mtd1 mtdblock10 mtdr11 ptyp2 tty ttypb
mtd10 mtdblock11 mtdr12 ptyp3 ttyS0 ttypc
mtd11 mtdblock12 mtdr13 ptyp4 ttyS1 ttypd
mtd12 mtdblock13 mtdr14 ptyp5 ttyS2 ttype
mtd13 mtdblock14 mtdr2 ptyp6 ttyS3 ttypf
mtd14 mtdblock2 mtdr3 ptyp7 ttyp0 urandom
mtd2 mtdblock3 mtdr4 ptyp8 ttyp1 zero
mtd3 mtdblock4 mtdr5 ptyp9 ttyp2
mtd4 mtdblock5 mtdr6 ptypa ttyp3
mtd5 mtdblock6 mtdr7 ptypb ttyp4
I have this, from the flash partition table section of menuconfig:
# ls -al /dev/flash
crw-r--r-- 1 root 0 90, 0 Jan 1 00:00 bitstream
crw-r--r-- 1 root 0 90, 2 Jan 1 00:00 boot
crw-r--r-- 1 root 0 90, 4 Jan 1 00:00 bootenv
crw-r--r-- 1 root 0 90, 6 Jan 1 00:00 config
crw-r--r-- 1 root 0 90, 8 Jan 1 00:00 image
crw-r--r-- 1 root 0 90, 10 Jan 1 00:00 jimfs
crw-r--r-- 1 root 0 90, 12 Jan 1 00:00 spare
(I created jimfs as a test).
What I want to do is use a range of flash sectors for a (jffs2 probably)
partition. I added the jimfs partition but
I can't seem to do anything useful with it. I.e. dd/cat on
/dev/flash/jimfs fails.
I tried to set up a CFI flash device physical memory map and got this:
physmap platform flash device: 01000000 at 21000000
physmap-flash.0: Found 1 x16 devices at 0x0 in 8-bit bank
Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
cfi_cmdset_0001: Erase suspend on write enabled
erase region 0: offset=0x0,size=0x20000,blocks=128
cmdlinepart partition parsing not available
RedBoot partition parsing not available
kobject_add failed for physmap-flash.0 with -EEXIST, don't try to
register things with the same name in the same directory.
Stack:
23fe9ea0 00000000 220d5dfc 23fdf9d0 221842f8 220d5e0c 221712cc 221842fc
000000a0 220b9e30 000041ed ffffffff 22184290 00000001 22184288 ffffffea
220db258 22184288 221745b0 22184334 21d5ffff 23e08c18 ffffffff 0000001c
Call Trace: [<220d5dfc>] [<220d5e0c>] [<220b9e30>] [<220db258>]
[<220db2c8>] [<2219bb8c>] [<2219bb5c>] [<220001c8>] [<220001c8>]
[<2200111c>] [<2200110c>]
uclinux[mtd]: RAM probe address=0x221b5938 size=0x161000
Creating 1 MTD partitions on "RAM":
0x00000000-0x00161000 : "ROMfs"
uclinux[mtd]: set ROMfs to be root filesystem index=1
I have read every resource I can find on this topic and still no joy.
This seems like a simple operation: create a partition, copy a jffs2
image to it, then mount it.
Anyone know the secret?
thanks.
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