Элементарно 
А где копирование рутфс в память ?
Тщательнее надо

Код
tftp 0х21100000 /tftpboot/rootfs
setenv bootcmd 'cp.b 0xD0030000 0x21500000 0x0011FD70; bootm 0x21500000'
boot
setenv bootcmd 'cp.b 0xD0030000 0x21500000 0x0011FD70; bootm 0x21500000'
boot
А где копирование рутфс в память ?
Тщательнее надо

я думал что по tftp сразу записываю в память рутфс, а второй строкой копирую из флеша ядро и запускаю его. Разве нет?
В ядре включена поддержка initrd и initramfs.
полный лог загрузки:
Цитата
U-Boot> boot
## Booting image at 21500000 ...
Image Name: linux-2.6.22.19
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1178928 Bytes = 1.1 MB
Load Address: 20008000
Entry Point: 20008000
Verifying Checksum ... OK
OK
Starting kernel ...
Uncompressing Linux...........................................................................
. done, booting the kernel.
Linux version 2.6.22.19 (roman@miracle) (gcc version 4.2.3 (Debian 4.2.3-3)) #2 Mon Apr 7 21:38:07 MSD 2008
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
Machine: Atmel AT91SAM9260-EK
Memory policy: ECC disabled, Data cache writeback
Clocks: CPU 198 MHz, master 99 MHz, main 18.432 MHz
CPU0: D VIVT write-back cache
CPU0: I cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
CPU0: D cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
Built 1 zonelists. Total pages: 16256
Kernel command line: mem=64M console=ttyS0,115200 initrd=0x21100000,3145728 root=/dev/ram0 rw
AT91: 96 gpio irqs in 3 banks
PID hash table entries: 256 (order: 8, 1024 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 64MB = 64MB total
Memory: 59392KB available (2112K code, 210K data, 108K init)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
NET: Registered protocol family 16
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
checking if image is initramfs...it isn't (bad gzip magic numbers); looks like an initrd
Freeing initrd memory: 3072K
NetWinder Floating Point Emulator V0.97 (double precision)
JFFS2 version 2.2. (NAND) (SUMMARY) \0xc2\0xa9 2001-2006 Red Hat, Inc.
io scheduler noop registered
io scheduler anticipatory registered (default)
atmel_usart.0: ttyS0 at MMIO 0xfefff200 (irq = 1) is a ATMEL_SERIAL
atmel_usart.1: ttyS1 at MMIO 0xfffb0000 (irq = 6) is a ATMEL_SERIAL
atmel_usart.2: ttyS2 at MMIO 0xfffb4000 (irq = 7) is a ATMEL_SERIAL
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
loop: module loaded
Davicom DM9161E: Registered new driver
Davicom DM9161A: Registered new driver
Davicom DM9131: Registered new driver
dm9000 Ethernet Driver
macb macb: detected PHY at address 0 (ID 0181:b8a0)
eth0: Atmel MACB at 0xfffc4000 irq 21 (3e:36:65:ba:6f:be)
No NAND device found!!!
usbmon: debugfs is not available
at91_ohci at91_ohci: AT91 OHCI
at91_ohci at91_ohci: new USB bus registered, assigned bus number 1
at91_ohci at91_ohci: irq 20, io mem 0x00500000
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
udc: at91_udc version 3 May 2006
ether gadget: using random self ethernet address
ether gadget: using random host ethernet address
usb0: Ethernet Gadget, version: May Day 2005
usb0: using at91_udc, OUT ep2 IN ep1 STATUS ep4
usb0: MAC 82:50:d6:0b:0f:0b
usb0: HOST MAC 7e:80:e2:8e:96:62
usb0: RNDIS ready
\0x00mice: PS/2 moususbcore: registered new interface driver usbhid
drivers/hid/usbhid/hid-core.c: v2.6:USB HID core driver
Advanced Linux Sound Architecture Driver Version 1.0.14 (Thu May 31 09:03:25 2007 UTC).
mmc0: card claims to support voltages below the defined range. These will be ignored.
ALSA device list:
No soundcards found.
TCP cubic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
RAMDISK: Couldn't find valid RAM disk image starting at 0.
List of all partitions:
No filesystem could mount root, tried: ext2 cramfs msdos vfat
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)
usb0: full speed config #1: 100 mA, Ethernet Gadget, using CDC Ethernet
## Booting image at 21500000 ...
Image Name: linux-2.6.22.19
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1178928 Bytes = 1.1 MB
Load Address: 20008000
Entry Point: 20008000
Verifying Checksum ... OK
OK
Starting kernel ...
Uncompressing Linux...........................................................................
. done, booting the kernel.
Linux version 2.6.22.19 (roman@miracle) (gcc version 4.2.3 (Debian 4.2.3-3)) #2 Mon Apr 7 21:38:07 MSD 2008
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
Machine: Atmel AT91SAM9260-EK
Memory policy: ECC disabled, Data cache writeback
Clocks: CPU 198 MHz, master 99 MHz, main 18.432 MHz
CPU0: D VIVT write-back cache
CPU0: I cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
CPU0: D cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
Built 1 zonelists. Total pages: 16256
Kernel command line: mem=64M console=ttyS0,115200 initrd=0x21100000,3145728 root=/dev/ram0 rw
AT91: 96 gpio irqs in 3 banks
PID hash table entries: 256 (order: 8, 1024 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 64MB = 64MB total
Memory: 59392KB available (2112K code, 210K data, 108K init)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
NET: Registered protocol family 16
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
checking if image is initramfs...it isn't (bad gzip magic numbers); looks like an initrd
Freeing initrd memory: 3072K
NetWinder Floating Point Emulator V0.97 (double precision)
JFFS2 version 2.2. (NAND) (SUMMARY) \0xc2\0xa9 2001-2006 Red Hat, Inc.
io scheduler noop registered
io scheduler anticipatory registered (default)
atmel_usart.0: ttyS0 at MMIO 0xfefff200 (irq = 1) is a ATMEL_SERIAL
atmel_usart.1: ttyS1 at MMIO 0xfffb0000 (irq = 6) is a ATMEL_SERIAL
atmel_usart.2: ttyS2 at MMIO 0xfffb4000 (irq = 7) is a ATMEL_SERIAL
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
loop: module loaded
Davicom DM9161E: Registered new driver
Davicom DM9161A: Registered new driver
Davicom DM9131: Registered new driver
dm9000 Ethernet Driver
macb macb: detected PHY at address 0 (ID 0181:b8a0)
eth0: Atmel MACB at 0xfffc4000 irq 21 (3e:36:65:ba:6f:be)
No NAND device found!!!
usbmon: debugfs is not available
at91_ohci at91_ohci: AT91 OHCI
at91_ohci at91_ohci: new USB bus registered, assigned bus number 1
at91_ohci at91_ohci: irq 20, io mem 0x00500000
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
udc: at91_udc version 3 May 2006
ether gadget: using random self ethernet address
ether gadget: using random host ethernet address
usb0: Ethernet Gadget, version: May Day 2005
usb0: using at91_udc, OUT ep2 IN ep1 STATUS ep4
usb0: MAC 82:50:d6:0b:0f:0b
usb0: HOST MAC 7e:80:e2:8e:96:62
usb0: RNDIS ready
\0x00mice: PS/2 moususbcore: registered new interface driver usbhid
drivers/hid/usbhid/hid-core.c: v2.6:USB HID core driver
Advanced Linux Sound Architecture Driver Version 1.0.14 (Thu May 31 09:03:25 2007 UTC).
mmc0: card claims to support voltages below the defined range. These will be ignored.
ALSA device list:
No soundcards found.
TCP cubic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
RAMDISK: Couldn't find valid RAM disk image starting at 0.
List of all partitions:
No filesystem could mount root, tried: ext2 cramfs msdos vfat
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)
usb0: full speed config #1: 100 mA, Ethernet Gadget, using CDC Ethernet