Hi Dan, I had used the kernel source from embedded edge (http://embeddededge.com/downloads/amd-alchemy/) to boot Au1550 based board. It can boot well and no TLB exceptions. But I've another issue during the boot. The kernel couldn't mount the filesystem (cramfs). It panics with the message "cramfs wrong magic". Please help me to solve this issue. I had listed below the boot message. Thanks and Regards, Xavier. YAMON ROM Monitor, Revision 02.20PB1550. Copyright (c) 1999-2000 MIPS Technologies, Inc. - All Rights Reserved. For a list of available commands, type 'help'. Compilation time = Dec 11 2003 08:34:31 MAC address = 0a.01.00.00.00.0f Processor Company ID = 0x03 Processor ID/revision = 0x02 / 0x00 Endianness = Little CPU = 396 MHz Flash memory size = 128 MByte SDRAM size = 128 MByte First free SDRAM address = 0x8008d484 Environment variable 'start' exists. After 2 seconds it will be interpreted as a YAMON command and executed. Press Ctrl-C to bypass this. YAMON> erase what... The following area will be erased: Start address = 0x18000000 Size = 0x07c00000 Confirm ? (y/n) y Erasing...Done YAMON> load -r tftp://10.145.2.248/cramfsimage.srec About to load tftp://10.145.2.248/cramfsimage.srec Press Ctrl-C to break ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................................ ........................ Start = 0xbf100000, range = (0xbf100000,0xbf6cdfff), format = SREC YAMON> load -r tftp://10.145.2.248/zImage.srec About to load tftp://10.145.2.248/zImage.srec Press Ctrl-C to break ........................................ ........................................ ........................... Start = 0xbf000000, range = (0xbf000000,0xbf0d5fff), format = SREC YAMON> go bf000000 root=/dev/mtdblock1 loaded at: BF000000 BF0D6000 relocated to: 81000000 810D6000 zimage at: 81006540 810D504D Uncompressing Linux at load address 80100000 Now booting the kernel CPU revision is: 03030200 Primary instruction cache 16kB, physically tagged, 4-way, linesize 32 bytes. Primary data cache 16kB 4-way, linesize 32 bytes. Linux version 2.4.25 (root@homenet2) (gcc version 2.95.3 20010315 (release/Monta Vista)) #3 Thu Mar 18 11:24:15 IST 2004 AMD Alchemy Pb1550 Board Au1550 AA (PRId 03030200) @ 396MHZ BCLK switching enabled! Determined physical RAM map: memory: 08000000 @ 00000000 (usable) On node 0 totalpages: 32768 zone(0): 32768 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: root=/dev/mtdblock1 console=ttyS0,115200 calculating r4koff... 003c6cc0(3960000) CPU frequency 396.00 MHz Console: colour dummy device 80x25 Calibrating delay loop... 395.67 BogoMIPS Memory: 126304k/131072k available (1684k kernel code, 4768k reserved, 216k data, 276k init, 0k highmem) Dentry cache hash table entries: 16384 (order: 5, 131072 bytes) Inode cache hash table entries: 8192 (order: 4, 65536 bytes) Mount cache hash table entries: 512 (order: 0, 4096 bytes) Buffer cache hash table entries: 8192 (order: 3, 32768 bytes) Page-cache hash table entries: 32768 (order: 5, 131072 bytes) Checking for 'wait' instruction... unavailable. POSIX conformance testing by UNIFIX Autoconfig PCI channel 0x80324138 Scanning bus 00, I/O 0x00000300:0x00100000, Mem 0x40000000:0x50000000 Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket Starting kswapd pty: 256 Unix98 ptys configured Serial driver version 1.01 (2001-02-08) with no serial options enabled ttyS00 at 0xb1100000 (irq = 0) is a 16550 ttyS01 at 0xb1200000 (irq = 1) is a 16550 ttyS02 at 0xb1300000 (irq = 2) is a 16550 ttyS03 at 0xb1400000 (irq = 3) is a 16550 loop: loaded (max 8 devices) au1000eth.c:1.4 ppopov@mvista.com eth0: Au1x Ethernet found at 0xb0500000, irq 27 eth0: AMD 79C874 10/100 BaseT PHY at phy address 31 eth0: Using AMD 79C874 10/100 BaseT PHY as default eth1: Au1x Ethernet found at 0xb0510000, irq 28 eth1: AMD 79C874 10/100 BaseT PHY at phy address 31 eth1: Using AMD 79C874 10/100 BaseT PHY as default Uniform Multi-Platform E-IDE driver Revision: 7.00beta4-2.4 ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx Au1550 psc audio: DAC: DMA16, ADC: DMA17 ac97_codec: AC97 Audio codec, id: 0x8384:0x7652 (SigmaTel STAC9752/53) Au1550 psc audio: AC'97 Base/Extended ID = 6a90/0a05 Pb1550 MTD: boot:swap 0 Pb1550 flash: probing 32-bit flash bus Pb1550 flash: Found 2 x16 devices at 0x4000000 in 32-bit mode Amd/Fujitsu Extended Query Table v1.3 at 0x0040 number of CFI chips: 2 Creating 3 MTD partitions on "Pb1550 flash": 0x00000000-0x07c00000 : "User FS" 0x07c00000-0x07d00000 : "yamon" 0x07d00000-0x07fc0000 : "raw kernel" mice: PS/2 mouse device common for all mice NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP, IGMP IP: routing cache hash table of 1024 buckets, 8Kbytes TCP: Hash tables configured (established 8192 bind 8192) NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. cramfs: wrong magic : Kernel panic: VFS: Unable to mount root fs on 1f:01 -- ______________________________________________ Check out the latest SMS services @ http://www.linuxmail.org This allows you to send and receive SMS through your mailbox. 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