[microblaze-uclinux] No filesystem could mount root

["Bertrand Rousseau" <bertrand.rousseau@xxxxxxxxx>]

(I think this mail did not reach the list last time I sent it, I'm
resending it, sorry if you already received it once)

Hi,

I'm trying to use petalinux on an Avnet XC5VL50 board and edk 9.2. I'm
skipping the use of FS-boot and U-boot for now since I have some
problems making them work right. I'm thus booting linux by downloading
the kernel image into DDR SDRAM using XMD.

The kernel is booting, but eventually it fails on a kernel panic. As
far as I can interpret the output, it seems that the kernel cannot
find the romfs. Unfortunately, I have no idea why it is so. I've
double checked the kernel options, and can't find any clue in order to
solve this. Maybe some of you can help me to identify the problem?

I included the kernel boot output below.

Regards,

----------

Linux version 2.6.20-uc0 (rousseau@toaster) (gcc version 3.4.1 ( PetaLinu7
setup_cpuinfo: initialising
setup_cpuinfo: No PVR support in CPU.  Using static compile-time info
set_cpuinfo_static: Using static CPU info.
setup_memory: max_mapnr: 0x8ffff
setup_memory: min_low_pfn: 0x8c000
setup_memory: max_low_pfn: 0x4000
On node 0 totalpages: 16384
 DMA zone: 128 pages used for memmap
 DMA zone: 0 pages reserved
 DMA zone: 16256 pages, LIFO batch:3
 Normal zone: 0 pages used for memmap
Built 1 zonelists.  Total pages: 16256
Kernel command line: �  ��  ��
OPB INTC #0 at 0x81800000
PID hash table entries: 256 (order: 8, 1024 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 63072k/65536k available
Calibrating delay loop... 49.45 BogoMIPS (lpj=247296)
Mount-cache hash table entries: 512
NET: Registered protocol family 16
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 2048 (order: 1, 8192 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 2048 bind 1024)
TCP reno registered
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
xgpio0 #0 at 0x81420000 mapped to 0x81420000 device: 10,185 not using IRQ
xgpio1 #1 at 0x81440000 mapped to 0x81440000 device: 10,186 not using IRQ
xgpio2 #2 at 0x81400000 mapped to 0x81400000 device: 10,187 not using IRQ
uartlite.0: ttyS0 at MMIO 0x84000000 (irq = 0) is a uartlite
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
eth0: using fifo mode.
eth0: No PHY detected.  Assuming a PHY at address 0.
eth0: Xilinx EMACLite #0 at 0x81000000 mapped to 0x81000000, irq=2
uclinux[mtd]: RAM probe address=0x8c1b6000 size=0x0
Creating 1 MTD partitions on "RAM":
0x00000000-0x00000000 : "ROMfs"
mtd: partition "ROMfs" is out of reach -- disabled
mtd: Giving out device 0 to ROMfs
uclinux[mtd]: set ROMfs to be root filesystem index=0
Generic platform RAM MTD, (c) 2004 Simtec Electronics
i8042.c: i8042 controller self test timeout.
mice: PS/2 mouse device common for all mice
TCP cubic registered
NET: Registered protocol family 1
mtdblock_open
ok
end_request: I/O error, dev mtdblock0, sector 2
EXT2-fs: unable to read superblock
mtdblock_release
ok
mtdblock_open
ok
mtdblock_release
ok
mtdblock_open
ok
end_request: I/O error, dev mtdblock0, sector 0
romfs: unable to read superblock
mtdblock_release
ok
No filesystem could mount root, tried:  ext2 cramfs romfs
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block)
 <0>Rebooting in 120 seconds..Machine restart...

Stack:
 8ffe3e84 00000000 00000000 00018d1c 00000000 8c01b64c 8c1790d0 0000000b
 0000000b 00000000 ffffcbcc 00000bcc 8c009adc 8c0e4bfc 000000a0 000000a0
 000000a0 000000a0 00000001 8c19ea88 8c179f38 00000078 8c1b7518 00000000
Call Trace: [<8c01b64c>] [<8c009adc>] [<8c0e4bfc>] [<8c19ea88>] [<8c19ee6

--
Bertrand Rousseau

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