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Altera_Forum's avatar
Altera_Forum
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20 years ago

1 flash programming question :)

i use altera cyclone board,the flash's capacity is 8M¡£my uclinux kernel is about 2099k, filesystem is about 1987k.

while i download the kernel, filesystem is covered.

error:Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0)

download the filesystem,kernel is covered.

sometimes the safe configuration is covered too(red led is on).

the flash still worked well,but yesterday the problem happened.

please tell me how to solve it,thank u!!!!

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    the information:

    uClinux/Nios II

    Altera Nios II support © 2004 Microtronix Datacom Ltd.

    setup_arch: No persistant network settings signature at 007F0000

    Built 1 zonelists

    Kernel command line: root=/dev/mtdblock0 ro

    PID hash table entries: 128 (order: 7, 2048 bytes)

    Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)

    Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)

    Memory available: 14384k/16384k RAM, 0k/0k ROM (1480k kernel code, 327k data)

    Mount-cache hash table entries: 512 (order: 0, 4096 bytes)

    NET: Registered protocol family 16

    NIOS serial driver version 0.0

    ttyS0 (irq = 4) is a builtin NIOS UART

    Serial: JTAG UART driver $Revision: 1.3 $

    ttyJ0 at MMIO 0x80920820 (irq = 1) is a jtag_uart

    RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize

    smc_probe: 50000 Khz Nios

    SMSC LAN91C111 Driver (v2.1), (Linux Kernel 2.6)

    eth0: SMC91C11xFD(rev:1) at 0x80910300 IRQ:6 MEMSIZE:8192b NOWAIT:0 ADDR: 00:07:

    ed:00:00:00

    smc_probe: 50000 Khz Nios

    Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2

    ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx

    CF: ctl=1

    hda: Hitachi CV 7.1.1, CFA DISK drive

    Using anticipatory io scheduler

    ide0 at 0x80900800-0x80900807,0x80900838 on irq 8

    hda: max request size: 128KiB

    hda: 31488 sectors (16 MB) w/1KiB Cache, CHS=246/4/32

    hda:<6>check_part[0]=17230780: hda1

    res=1:<4>CFI: Found no Microtronix map device at location zero

    JEDEC: Found no Microtronix map device at location zero

    NET: Registered protocol family 2

    IP: routing cache hash table of 512 buckets, 4Kbytes

    TCP: Hash tables configured (established 1024 bind 2048)

    NET: Registered protocol family 1

    NET: Registered protocol family 17

    VFS: Cannot open root device "mtdblock0" or unknown-block(0,0)

    Please append a correct "root=" boot option

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

    ---------then stop,7-seg led is 88.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    If you can remove something you don&#39;t really need in kernel, and make the kernel smaller than 2M, that will be the best. If you can not reduce the size of kernel to less than 2M, I would recommend u-boot, which allows you to compress the kernel to less than 1M.