[U-Boot-Users] cannot mount NFS root fs

-- An expert is one who knows more and more about less and less until he knows absolutely everything about nothing. U-Boot 0.2.0 (Jan 15 2003 - 19:40:31) CPU: XPC860SRZPnnC1 at 50 MHz: 4 kB I-Cache 4 kB D-Cache MPC860 Processor Card SDRAM: 32 MB Top of RAM usable for U-Boot at: 02000000 Reserving 272k for U-Boot at: 01fbc000 Reserving 384k for malloc() at: 01f5c000 Reserving 60 Bytes for Board Info at: 01f5bfc4 Reserving 44 Bytes for Global Data at: 01f5bf98 Stack Pointer at: 01f5bf78 New Stack Pointer is: 01f5bf78 Now running in RAM - U-Boot at: 01fbc000 FLASH: 2 MB In: serial Out: serial Err: serial U-Boot relocated to 01fbc000 Net: SCC ETHERNET =>printenv bootargs=root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off bootcmd=bootp 0x00180000 baudrate=19200 loads_echo=1 ethaddr=52:54:ab:54:82:5e rootpath="/opt/ppc_8xx" bootfile="/tftpboot/pImage" stdin=serial stdout=serial stderr=serial Environment size: 296/1020 bytes =>bootcmd Trying SCC ETHERNET BOOTP broadcast 1 got BOOTP packet (src=67, dst=68, len=300 want_len=300) Filtering pkt = 0 Bootfile: /tftpboot/pImage Got good BOOTP ARP broadcast 1 Got good ARP - start TFTP TFTP from server 192.168.0.113; our IP address is 192.168.0.253 Filename '/tftpboot/pImage'. Load address: 0x180000 Loading: ################################################################# ########################### done Bytes transferred = 466491 (71e3b hex) =>printenv bootargs=root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off bootcmd=bootp 0x00180000 baudrate=19200 loads_echo=1 ethaddr=52:54:ab:54:82:5e stdin=serial stdout=serial stderr=serial bootfile=/tftpboot/pImage filesize=71e3b gatewayip=192.168.0.254 netmask=255.255.255.0 hostname=procard rootpath=/opt/ppc_8xx ipaddr=192.168.0.253 serverip=192.168.0.113 Environment size: 414/1020 bytes => =>bootm 0x180000 ## Booting image at 00180000 ... Image Name: Linux Kernel Image Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 466427 Bytes = 455.5 kB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK ## Current stack ends at 0x01F5BC20 => set upper limit to 0x00800000 ## cmdline at 0x007FFF00 ... 0x007FFF72 bd address = 0x01F5BFC4 memstart = 0x00000000 memsize = 0x02000000 flashstart = 0xFFE00000 flashsize = 0x00200000 flashoffset = 0x00044000 sramstart = 0x00000000 sramsize = 0x00000000 immr_base = 0xFF000000 bootflags = 0x00000001 intfreq = 50 MHz busfreq = 50 MHz ethaddr = 52:54:AB:54:82:5E IP addr = 192.168.0.253 baudrate = 19200 bps No initrd ## Transferring control to Linux (at address 00000000) ... Linux version 2.4.18 (root@hi-jack) (gcc version 2.95.3 20010315 (release)) #1 Wed Jan 15 17:35:12 CST 2003 On node 0 totalpages: 8192 zone(0): 8192 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off Decrementer Frequency = 187500000/60 Warning: real time clock seems stuck! Calibrating delay loop... 49.86 BogoMIPS Memory: 30976k available (896k kernel code, 288k data, 52k init, 0k highmem) Dentry-cache hash table entries: 4096 (order: 3, 32768 bytes) Inode-cache hash table entries: 2048 (order: 2, 16384 bytes) Mount-cache hash table entries: 512 (order: 0, 4096 bytes) Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes) Page-cache hash table entries: 8192 (order: 3, 32768 bytes) POSIX conformance testing by UNIFIX Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket Starting kswapd CPM UART driver version 0.03 ttyS00 at 0x0280 is a SMC block: 64 slots per queue, batch=16 RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize eth0: CPM ENET Version 0.2 on SCC1, 52:54:ab:54:82:5e loop: loaded (max 8 devices) NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP IP: routing cache hash table of 512 buckets, 4Kbytes TCP: Hash tables configured (established 2048 bind 2048) IP-Config: Unable to set interface netmask (-22). NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. Looking up port of RPC 100003/2 on 157.0.0.0 RPC: sendmsg returned error 101 portmap: RPC call returned error 101 Root-NFS: Unable to get nfsd port number from server, using default Looking up port of RPC 100005/1 on 157.0.0.0 RPC: sendmsg returned error 101 portmap: RPC call returned error 101 Root-NFS: Unable to get mountd port number from server, using default RPC: sendmsg returned error 101 mount: RPC call returned error 101 Root-NFS: Server returned error -101 while mounting /tftpboot/$(serverip):$(root path) VFS: Unable to mount root fs via NFS, trying floppy. VFS: Cannot open root device "nfs" or 02:00 Please append a correct "root=" boot option Kernel panic: VFS: Unable to mount root fs on 02:00 <0>Rebooting in 180 seconds..