2008-11-23 23:11:05     Mount Root File System to USB

2008-11-23 23:11:05     Mount Root File System to USB

David Waterhouse (UNITED STATES)

Message: 65734   

I have a BF537 Stamp and a USB add on card (ADDS-USB-EZEXT). 

Is it possible to load and mount the uClinux root file system on a USB hard drive connected to the USB card?

Has anyone done this before?

QuoteReplyEditDelete

2008-11-24 02:51:36     Re: Mount Root File System to USB

Mike Frysinger (UNITED STATES)

Message: 65738   

first make sure you can detect the USB device and read/write files.  if you can do that, using it as a root filesystem is trivial.

QuoteReplyEditDelete

2008-11-27 19:43:43     Re: Mount Root File System to USB

David Waterhouse (UNITED STATES)

Message: 65927   

Mike,

Right now I'm loading vmlinux from the parallel flash and then mounting the root file system using NFS.

I copied the root file system to a flash drive (Lexar Jumpdrive) under directory /romfs and I can read and write to it.

I wanted to try to auto-mount it when uclinux boots, so I added the uboot variables usbboot and usbargs (shown below), with root device of /dev/usb.  When I tried to boot by running the usbboot variable (bootcmd=run usbboot) it failed saying <<Cannot open root device "usb">>.

Is there a correct setting for the root device that would allow auto-mounting of the file system on the flash drive when uclinux boots?

See attached outputs:

A. UBOOT variables

B. uclinux Reset Output (attempt to do USB mounting)

C. uclinux Reset Output (with NFS mounting)

===================================================

A. UBOOT variables:

baudrate=57600

loads_echo=1

autoload=no

hostname=BF537

loadaddr=0x1000000

ramargs=setenv bootargs root=/dev/mtdblock0 rw

addip=setenv bootargs $(bootargs) ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname):eth0:off

ramboot=tftpboot $(loadaddr) linux;run ramargs;run addip;bootelf

update=tftpboot $(loadaddr) u-boot.bin;protect off 0x20000000 0x2007FFFF;erase 0x20000000 0x2007FFFF;cp.b 0x1000000 0x20000000 $(filesize)

ethact=BF537 ETHERNET

ethaddr=00:e0:22:fe:bc:5b

flashboot=bootm 0x20020000

rootpath=/share/romfs

nfsargs=set bootargs root=/dev/nfs rw nfsroot=$(serverip):$(rootpath),$(nfsoptions)

nfsoptions=tcp,nfsvers=2

nfsboot=run nfsargs;run addip;bootelf 0x20020000

gatewayip=192.168.1.1

netmask=255.255.255.0

ipaddr=192.168.1.252

serverip=192.168.1.106

usbargs=set bootargs root=/dev/usb rw

usbboot=run usbargs;run addip;bootelf 0x20020000

bootdelay=4

bootcmd=run usbboot

stdin=serial

stdout=serial

stderr=serial

Environment size: 932/8188 bytes

========================================================================

B. uclinux Reset Output (attempt to do USB mounting)

icache_enable

U-Boot 1.1.6-svn (ADI-2007R1) (Oct  4 2007 - 12:42:05)

CPU:   ADSP BF537 Rev.: 0.2

Board: ADI BF537 stamp board

       Support: http://blackfin.uclinux.org/

Clock: VCO: 500 MHz, Core: 500 MHz, System: 100 MHz

SDRAM: 64 MB

FLASH:   4 MB

In:    serial

Out:   serial

Err:   serial

Net:    BF537 ETHERNET

I2C:   ready

autoboot in 4 seconds: press space to stop

Loading .text @ 0x00001000 (1378800 bytes)

Loading .rodata @ 0x00152000 (336560 bytes)

Loading __ksymtab @ 0x001a42b0 (16920 bytes)

Loading __ksymtab_gpl @ 0x001a84c8 (4520 bytes)

Loading __ksymtab_gpl_future @ 0x001a9670 (24 bytes)

Loading __ksymtab_strings @ 0x001a9688 (51812 bytes)

Loading __param @ 0x001b60ec (760 bytes)

Loading .data @ 0x001b7000 (102400 bytes)

Loading .init.text @ 0x001d0000 (99096 bytes)

Loading .init.data @ 0x001e8318 (9336 bytes)

Loading .init.setup @ 0x001ea790 (600 bytes)

Loading .initcall.init @ 0x001ea9e8 (512 bytes)

Loading .con_initcall.init @ 0x001eabe8 (4 bytes)

Loading .init.ramfs @ 0x001eabec (134 bytes)

Loading .text_l1 @ 0xffa00000 (8248 bytes)

sh_addr: FFA00000, p_paddr: 001EAC72

Loading from: 2020B000 to 001EAC72, size: 8248

Loading .data_l1 @ 0xff800000 (192 bytes)

sh_addr: FF800000, p_paddr: 001ECCAA

Loading from: 2020E000 to 001ECCAA, size: 192

Clearing .bss @ 0x001ed000 (78660 bytes)

## Starting application at 0x001d0000 ...

Linux version 2.6.22.18-ADI-2008R1-svn (david@hp1) (gcc version 4.1.2 (ADI svn)) #171 Mon Nov 24 20:25:26 EST 2008

Hardware Trace Active and Enabled

Warning: limiting memory to 56MB due to hardware anomaly 05000263

Blackfin support (C) 2004-2007 Analog Devices, Inc.

Compiled for ADSP-BF537 Rev 0.2

Blackfin Linux support by http://blackfin.uclinux.org/

Processor Speed: 500 MHz core clock and 100 MHz System Clock

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

  text      = 0x00001000-0x001519f0

  rodata    = 0x00152000-0x001b63e4

  data      = 0x001b7000-0x001d0000

    stack   = 0x001b8000-0x001ba000

  init      = 0x001d0000-0x001ed000

  bss       = 0x001ed000-0x00200344

  available = 0x00200344-0x037ff000

  DMA Zone  = 0x03f00000-0x04000000

Instruction Cache Enabled

Data Cache Enabled (write-through)

Built 1 zonelists.  Total pages: 14224

Kernel command line: root=/dev/usb rw ip=192.168.1.252:192.168.1.106:192.168.1.1:255.255.255.0:BF537:eth0:off

Configuring Blackfin Priority Driven Interrupts

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 available: 54712k/65536k RAM, (116k init code, 1346k kernel code, 582k data, 1024k dma, 7756k reserved)

Blackfin Scratchpad data SRAM: 4 KB

Blackfin Data A SRAM: 16 KB (15 KB free)

Blackfin Data B SRAM: 16 KB (16 KB free)

Blackfin Instruction SRAM: 48 KB (39 KB free)

Security Framework v1.0.0 initialized

Mount-cache hash table entries: 512

NET: Registered protocol family 16

Blackfin GPIO Controller

Blackfin DMA Controller

stamp_init(): registering device resources

Generic PHY: Registered new driver

SCSI subsystem initialized

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

NET: Registered protocol family 2

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

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler cfq registered

PPI: PPI-EKC Driver INIT IRQ:23

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

SoftDog: cannot register miscdev on minor=130 (err=-16)

Serial: Blackfin serial driver

bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 18) is a BFIN-UART

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

SMSC LAN83C185: Registered new driver

bfin_mac_mdio: probed

bfin_mac: attached PHY driver [SMSC LAN83C185] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=19)@sclk=100MHz)

bfin_mac: Version 1.1, Blackfin BF53[67] BF527 on-chip Ethernet MAC driver

bfin-spi bfin-spi.0: Blackfin BF5xx on-chip SPI Contoller Driver, Version 1.0, regs_base@ffc00500, dma channel@7

driver isp1362-hcd, 2005-04-04

isp1362-hcd isp1362-hcd.0: ISP1362 Host Controller

isp1362-hcd isp1362-hcd.0: new USB bus registered, assigned bus number 1

isp1362_hc_reset:

isp1362-hcd isp1362-hcd.0: irq 53, io mem 0x20360000

isp1362_hc_start:

isp1362-hcd isp1362-hcd.0: ISP1362 Memory usage:

isp1362-hcd isp1362-hcd.0:   ISTL:    2 *  256:      512 @ $0000:$0100

isp1362-hcd isp1362-hcd.0:   INTL:   16 * ( 64+8):  1152 @ $0200

isp1362-hcd isp1362-hcd.0:   ATL :   32 * ( 64+8):  2304 @ $0680

isp1362-hcd isp1362-hcd.0:   USED/FREE:   3968       128

usb usb1: configuration #1 chosen from 1 choice

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

ISP1362 Host Controller, irq 53

sl811: driver sl811-hcd, 19 May 2005

sl811-hcd sl811-hcd.0: SL811HS v1.5

sl811-hcd sl811-hcd.0: new USB bus registered, assigned bus number 2

sl811-hcd sl811-hcd.0: irq 54, io mem 0x20340000

usb usb2: configuration #1 chosen from 1 choice

hub 2-0:1.0: USB hub found

hub 2-0:1.0: 1 port detected

Initializing USB Mass Storage driver...

usb 2-1: new full speed USB device using sl811-hcd and address 2

usb 2-1: device descriptor read/64, error -62

usb 2-1: configuration #1 chosen from 1 choice

scsi0 : SCSI emulation for USB Mass Storage devices

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0

TCP cubic registered

NET: Registered protocol family 1

NET: Registered protocol family 17

rtc-bfin rtc-bfin: setting the system clock to 1970-01-01 14:11:20 (51080)

IP-Config: Complete:

      device=eth0, addr=192.168.1.252, mask=255.255.255.0, gw=192.168.1.1,

     host=BF537, domain=, nis-domain=(none),

     bootserver=192.168.1.106, rootserver=192.168.1.106, rootpath=

Looking up port of RPC 100003/2 on 192.168.1.106

PHY: 0:01 - Link is Up - 100/Full

Looking up port of RPC 100005/1 on 192.168.1.106

Root-NFS: Server returned error -13 while mounting /tftpboot/BF537

VFS: Unable to mount root fs via NFS, trying floppy.

VFS: Cannot open root device "usb" or unknown-block(2,0)

Please append a correct "root=" boot option; here are the available partitions:

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

========================================================================

C. uclinux Reset Output (with NFS mounting)

icache_enable

U-Boot 1.1.6-svn (ADI-2007R1) (Oct  4 2007 - 12:42:05)

CPU:   ADSP BF537 Rev.: 0.2

Board: ADI BF537 stamp board

       Support: http://blackfin.uclinux.org/

Clock: VCO: 500 MHz, Core: 500 MHz, System: 100 MHz

SDRAM: 64 MB

FLASH:   4 MB

In:    serial

Out:   serial

Err:   serial

Net:    BF537 ETHERNET

I2C:   ready

autoboot in 4 seconds: press space to stop

Loading .text @ 0x00001000 (1378800 bytes)

Loading .rodata @ 0x00152000 (336560 bytes)

Loading __ksymtab @ 0x001a42b0 (16920 bytes)

Loading __ksymtab_gpl @ 0x001a84c8 (4520 bytes)

Loading __ksymtab_gpl_future @ 0x001a9670 (24 bytes)

Loading __ksymtab_strings @ 0x001a9688 (51812 bytes)

Loading __param @ 0x001b60ec (760 bytes)

Loading .data @ 0x001b7000 (102400 bytes)

Loading .init.text @ 0x001d0000 (99096 bytes)

Loading .init.data @ 0x001e8318 (9336 bytes)

Loading .init.setup @ 0x001ea790 (600 bytes)

Loading .initcall.init @ 0x001ea9e8 (512 bytes)

Loading .con_initcall.init @ 0x001eabe8 (4 bytes)

Loading .init.ramfs @ 0x001eabec (134 bytes)

Loading .text_l1 @ 0xffa00000 (8248 bytes)

sh_addr: FFA00000, p_paddr: 001EAC72

Loading from: 2020B000 to 001EAC72, size: 8248

Loading .data_l1 @ 0xff800000 (192 bytes)

sh_addr: FF800000, p_paddr: 001ECCAA

Loading from: 2020E000 to 001ECCAA, size: 192

Clearing .bss @ 0x001ed000 (78660 bytes)

## Starting application at 0x001d0000 ...

Linux version 2.6.22.18-ADI-2008R1-svn (david@hp1) (gcc version 4.1.2 (ADI svn)) #171 Mon Nov 24 20:25:26 EST 2008

Hardware Trace Active and Enabled

Warning: limiting memory to 56MB due to hardware anomaly 05000263

Blackfin support (C) 2004-2007 Analog Devices, Inc.

Compiled for ADSP-BF537 Rev 0.2

Blackfin Linux support by http://blackfin.uclinux.org/

Processor Speed: 500 MHz core clock and 100 MHz System Clock

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

  text      = 0x00001000-0x001519f0

  rodata    = 0x00152000-0x001b63e4

  data      = 0x001b7000-0x001d0000

    stack   = 0x001b8000-0x001ba000

  init      = 0x001d0000-0x001ed000

  bss       = 0x001ed000-0x00200344

  available = 0x00200344-0x037ff000

  DMA Zone  = 0x03f00000-0x04000000

Instruction Cache Enabled

Data Cache Enabled (write-through)

Built 1 zonelists.  Total pages: 14224

Kernel command line: root=/dev/nfs rw nfsroot=192.168.1.106:/share/romfs,tcp,nfsvers=2 ip=192.168.1.252:192.168.1.106:192.168.1.1:255.255.255.0:BF537:eth0:off

Configuring Blackfin Priority Driven Interrupts

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 available: 54712k/65536k RAM, (116k init code, 1346k kernel code, 582k data, 1024k dma, 7756k reserved)

Blackfin Scratchpad data SRAM: 4 KB

Blackfin Data A SRAM: 16 KB (15 KB free)

Blackfin Data B SRAM: 16 KB (16 KB free)

Blackfin Instruction SRAM: 48 KB (39 KB free)

Security Framework v1.0.0 initialized

Mount-cache hash table entries: 512

NET: Registered protocol family 16

Blackfin GPIO Controller

Blackfin DMA Controller

stamp_init(): registering device resources

Generic PHY: Registered new driver

SCSI subsystem initialized

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

NET: Registered protocol family 2

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

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler cfq registered

PPI: PPI-EKC Driver INIT IRQ:23

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

SoftDog: cannot register miscdev on minor=130 (err=-16)

Serial: Blackfin serial driver

bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 18) is a BFIN-UART

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

SMSC LAN83C185: Registered new driver

bfin_mac_mdio: probed

bfin_mac: attached PHY driver [SMSC LAN83C185] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=19)@sclk=100MHz)

bfin_mac: Version 1.1, Blackfin BF53[67] BF527 on-chip Ethernet MAC driver

bfin-spi bfin-spi.0: Blackfin BF5xx on-chip SPI Contoller Driver, Version 1.0, regs_base@ffc00500, dma channel@7

driver isp1362-hcd, 2005-04-04

isp1362-hcd isp1362-hcd.0: ISP1362 Host Controller

isp1362-hcd isp1362-hcd.0: new USB bus registered, assigned bus number 1

isp1362_hc_reset:

isp1362-hcd isp1362-hcd.0: irq 53, io mem 0x20360000

isp1362_hc_start:

isp1362-hcd isp1362-hcd.0: ISP1362 Memory usage:

isp1362-hcd isp1362-hcd.0:   ISTL:    2 *  256:      512 @ $0000:$0100

isp1362-hcd isp1362-hcd.0:   INTL:   16 * ( 64+8):  1152 @ $0200

isp1362-hcd isp1362-hcd.0:   ATL :   32 * ( 64+8):  2304 @ $0680

isp1362-hcd isp1362-hcd.0:   USED/FREE:   3968       128

usb usb1: configuration #1 chosen from 1 choice

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

ISP1362 Host Controller, irq 53

sl811: driver sl811-hcd, 19 May 2005

sl811-hcd sl811-hcd.0: SL811HS v1.5

sl811-hcd sl811-hcd.0: new USB bus registered, assigned bus number 2

sl811-hcd sl811-hcd.0: irq 54, io mem 0x20340000

usb usb2: configuration #1 chosen from 1 choice

hub 2-0:1.0: USB hub found

hub 2-0:1.0: 1 port detected

Initializing USB Mass Storage driver...

usb 2-1: new full speed USB device using sl811-hcd and address 2

usb 2-1: device descriptor read/64, error -62

usb 2-1: configuration #1 chosen from 1 choice

scsi0 : SCSI emulation for USB Mass Storage devices

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0

TCP cubic registered

NET: Registered protocol family 1

NET: Registered protocol family 17

rtc-bfin rtc-bfin: setting the system clock to 1970-01-01 13:30:11 (48611)

IP-Config: Complete:

      device=eth0, addr=192.168.1.252, mask=255.255.255.0, gw=192.168.1.1,

     host=BF537, domain=, nis-domain=(none),

     bootserver=192.168.1.106, rootserver=192.168.1.106, rootpath=

Looking up port of RPC 100003/2 on 192.168.1.106

PHY: 0:01 - Link is Up - 100/Full

Looking up port of RPC 100005/1 on 192.168.1.106

scsi 0:0:0:0: Direct-Access     LEXAR    JUMPDRIVE        1000 PQ: 0 ANSI: 0 CCS

sd 0:0:0:0: [sda] 502880 512-byte hardware sectors (257 MB)

sd 0:0:0:0: [sda] Write Protect is off

sd 0:0:0:0: [sda] Assuming drive cache: write through

sd 0:0:0:0: [sda] 502880 512-byte hardware sectors (257 MB)

sd 0:0:0:0: [sda] Write Protect is off

sd 0:0:0:0: [sda] Assuming drive cache: write through

sda: sda1

sd 0:0:0:0: [sda] Attached SCSI removable disk

VFS: Mounted root (nfs filesystem).

Freeing unused kernel memory: 116k freed

dma_alloc_init: dma_page @ 0x001ea000 - 256 pages at 0x03f00000

                           _____________________________________

        a8888b.           / Welcome to the uClinux distribution \

       d888888b.         /       _     _                         \

       8P"YP"Y88        /       | |   |_|            __  __ (TM)  |

       8|o||o|88  _____/        | |    _ ____  _   _ \ \/ /       |

       8'    .88       \        | |   | |  _ \| | | | \  /        |

       8`._.' Y8.       \       | |__ | | | | | |_| | /  \        |

      d/      `8b.       \      \____||_|_| |_|\____|/_/\_\       |

     dP   .    Y8b.       \   For embedded processors including   |

    d8:'  "  `::88b        \    the Analog Devices Blackfin      /

   d8"         'Y88b        \___________________________________/

  :8P    '      :888

   8a.   :     _a88P         For further information, check out:

._/"Yaa_:   .| 88P|            - http://blackfin.uclinux.org/

\    YP"    `| 8P  `.          - http://docs.blackfin.uclinux.org/

/     \.___.d|    .'           - http://www.uclinux.org/

`--..__)8888P`._.'  jgs/a:f    - http://www.analog.com/blackfin

Have a lot of fun...

BusyBox v1.4.1 (2008-09-20 21:38:12 EDT) Built-in shell (msh)

Enter 'help' for a list of built-in commands.

root:/> [01/Jan/1970:13:30:19 +0000] boa: server version Boa/0.94.14rc21

[01/Jan/1970:13:30:19 +0000] boa: server built Sep 20 2008 at 21:38:07.

[01/Jan/1970:13:30:19 +0000] boa: starting server pid=144, port 9990

root:/>

QuoteReplyEditDelete

2008-11-27 21:19:37     Re: Mount Root File System to USB

Mike Frysinger (UNITED STATES)

Message: 65935   

why do you think /dev/usb is the correct path ?  you have to give it the real root device and /dev/usb is not a real device.

you probably also want to make sure to use the rootwait option since you're attempting to use a usb device.  read linux-2.6.x/Documentation/kernel-parameters.txt for more information.