NIOS2 MMU - booting vmlinux - No filesystem could mount root

Altera_Forum · ‎01-26-2012

I can not boot vmlinux. I'm trying to boot it because I have a small 8MB SDRAM on DE2 board and would like to avoid kernel image decompress process . I get sth like this:

nios2-terminal

nios2-terminal: connected to hardware target using JTAG UART on cable

nios2-terminal: "USB-Blaster [USB 1-1.1.2]", device 1, instance 0

nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)

Linux version 2.6.34-00692-g5bc7853-dirty (lukasz@lenovo) (gcc veLinux

version 2.6.34-00692-g5bc7853-dirty (lukasz@lenovo) (gcc version

4.1.2)# 5 Thu Jan 26 02:00:29 CET 2012

bootconsole [early0] enabled

early_console initialized at 0xe1801490

Linux/Nios II-MMU

init_bootmem_node(?,0xa88, 0x800, 0x1000)

free_bootmem(0xa88000, 0x578000)

reserve_bootmem(0xa88000, 0x100)

Built 1 zonelists in Zone order, mobility grouping off. Total pages: 2032

Kernel command line:

PID hash table entries: 32 (order: -5, 128 bytes)

Dentry cache hash table entries: 1024 (order: 0, 4096 bytes)

Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)

We have 4096 pages of RAM

Memory available: 5516k/2591k RAM, 0k/0k ROM (1974k kernel code, 617k data)

Hierarchical RCU implementation.

NR_IRQS:32

Calibrating delay loop... 24.21 BogoMIPS (lpj=121088)

Mount-cache hash table entries: 512

NET: Registered protocol family 16

init_BSP(): registering device resources

bio: create slab <bio-0> at 0

Switching to clocksource timer

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 512 (order: 0, 4096 bytes)

TCP bind hash table entries: 512 (order: -1, 2048 bytes)

TCP: Hash tables configured (established 512 bind 512)

TCP reno registered

UDP hash table entries: 256 (order: 0, 4096 bytes)

UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)

NET: Registered protocol family 1

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

RPC: Registered tcp NFSv4.1 backchannel transport module.

msgmni has been set to 16

Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)

io scheduler noop registered

io scheduler deadline registered

io scheduler cfq registered (default)

ttyJ0 at MMIO 0x1801490 (irq = 1) is a Altera JTAG UART

console [ttyJ0] enabled, bootconsole disabled

ttyS0 at MMIO 0x1801420 (irq = 2) is a Altera UART

dm9000 Ethernet Driver, V1.31

dm9000 dm9000.0: eth%d: Invalid ethernet MAC address. Please set using ifconfig

eth0: dm9000a at e1801498,e180149c IRQ 5 MAC: 00:00:00:00:00:00 (chip)

mice: PS/2 mouse device common for all mice

TCP cubic registered

NET: Registered protocol family 17

List of all partitions:

No filesystem could mount root, tried:

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

mages$ ls -lh

razem 25M

-rwxr-xr-x 1 lukasz lukasz 5,4M 2012-01-26 01:55 linux.initramfs.gz

-rw-r--r-- 1 lukasz lukasz 5,5M 2012-01-26 01:55 rootfs.initramfs

-rw-r--r-- 1 lukasz lukasz 15K 2012-01-26 01:55 rootfs.initramfs.contents

-rw-r--r-- 1 lukasz lukasz 2,4M 2012-01-26 01:55 rootfs.initramfs.gz

-rw-r--r-- 1 lukasz lukasz 3,0M 2012-01-26 01:55 rootfs.jffs2

-rw-r--r-- 1 lukasz lukasz 550K 2012-01-26 01:55 System.map.initramfs.gz

-rw-r--r-- 1 lukasz lukasz 1,2M 2012-01-26 01:55 vmImage

-rwxr-xr-x 1 lukasz lukasz 3,1M 2012-01-26 01:55 vmlinux

lrwxrwxrwx 1 lukasz lukasz 19 2012-01-26 01:55 zImage -> zImage.initramfs.gz

-rwxr-xr-x 1 lukasz lukasz 3,5M 2012-01-26 01:55 zImage.initramfs.gz

I was tring make a smaller image and get 3.1M compressed image but it was also to few.

Can I boot decompressed vmlinux image?

Altera_Forum · ‎01-28-2012

Hi All

I'm still fighting with this problem. I wonder if I could this root fs have on flash? I have successfully run u-boot and can program flash. Will be good if I would have rootfs.jffs2 on flash and program SDRAM with vmlinux? And how to show kernel that rootfs is on flash...?