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Hi,<BR>
<BR>
I don't have a clear idea about this, but it seems to me that there's probably something in your root filesystem that is causing output to be directed to a different console that the serial console. Maybe it's using the wrong getty program.<BR>
<BR>
- John<BR>
<BR>
On Thu, 2008-07-03 at 15:42 +0530, Anand Kumar S wrote:
<BLOCKQUOTE TYPE=CITE>
<FONT SIZE="2"><FONT COLOR="#000000">Hi,</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">I am using MVL 4.0.1 to boot on ML403 board. I have created the xparameters.h file using EDK 10.1 and I was able to boot the kernel with 32 MB of memory and UART set as std 16550 uart.</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">Since this board came without sysace flash card I am using ramdisk technique to boot linux. I created a small ramdisk with my test program which sleeps for 10 seconds and prints a hello</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">world using printf. I modified kernel init/main.c to execute /bin/test (my test program) from the RAMDISK. I created the ramdisk and appended with zImage using make zImage.initrd command</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">I used dow method from xmd to download the zImage.initrd.elf on the board and I was able to boot the board till the point of executing my /bin/test. However I see that the print statements</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">from my test program are not coming on the serial port. I see that the printf calls tty_io write and it goes to uart_write routine in serial_core.c, however I am not able to see my prints on</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">the hyperterminal. I can see all the kernel printks except for this printf statement from my user program. Also all the kernel printks seem to call serial_8250_console write routine but the</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">user application seems to call the uart_write routine. Does someone have any idea about what might be going wrong here? Is it something to do with serial console settings ?</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">Any help is greatly appreciated as I am really struggling with this problem for the past 3 days. Given below is the output from serial port. I do not have FB support or VT or VT console</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">Support enabled. Only SERIAL console support is enabled i.e SERIAL_CORE_CONSOLE/SERIAL_8250_CONSOLE support is enabled</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">…..</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">…..</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">Serial: 8250/16550 driver $Revision: 1.90 $ 5 ports, IRQ sharing disabled</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">Registering platform device 'serial8250'. Parent at platform</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">ttyS0 at MMIO 0x0 (irq = 9) is a 16550A</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">io scheduler noop registered</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">io scheduler anticipatory registered</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">io scheduler deadline registered</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">io scheduler cfq registered</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">loop: loaded (max 8 devices)</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">PPP generic driver version 2.4.2</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">PPP Deflate Compression module registered</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">NET: Registered protocol family 24</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">xemac 0: using fifo mode.</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">eth0: Xilinx EMAC #0 at 81000000 mapped to 0xC30C0000, irq=0</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">i2c /dev entries driver</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">xilinx_iic.0 #0 at 0x81600000 mapped to 0xC30E0000, irq=6</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">mice: PS/2 mouse device common for all mice</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">NET: Registered protocol family 2</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">IP: routing cache hash table of 512 buckets, 4Kbytes</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">TCP: Hash tables configured (established 2048 bind 4096)</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">NET: Registered protocol family 1</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">NET: Registered protocol family 17</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">interrupts enabled </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">TX interrupts enabled. register baseaddr c30c0000 offset 7fc is 8 </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">TX interrupts enabled. register baseaddr c30c0000 offset ffc is 0 </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">RX interrupts enabled. register baseaddr c30c0000 offset 17fc is 9 </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">RX interrupts enabled. register baseaddr c30c0000 offset 1ffc is 0 </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">GIER interrupts enabled. register baseaddr c30c0000 offset 7f8 is 80000000 </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">Sending DHCP requests .,... OK</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">IP-Config: Got DHCP answer from 0.0.0.0, my address is 10.100.12.132</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">IP-Config: Complete:</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> device=eth0, addr=10.100.12.132, mask=255.255.255.0, gw=10.100.12.1,</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> host=10.100.12.132, domain=hclt.corp.hcl.in, nis-domain=(none),</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> bootserver=0.0.0.0, rootserver=0.0.0.0, rootpath=</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">RAMDISK: Compressed image found at block 0</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">VFS: Mounted root (ext2 filesystem).</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">Freeing unused kernel memory: 124k init</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">done freeing memory. creating console </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">console created </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">running process /bin/test </FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">in tty_write</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">before calling write. buf contents h e l</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">core write</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">core write</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">core write</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000">Kernel panic - not syncing: Attempted to kill init!</FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> <0>Rebooting in 180 seconds..<NULL></FONT></FONT><BR>
<BR>
<FONT SIZE="2"><FONT COLOR="#000000"> </FONT></FONT><BR>
<BR>
<BR>
</BLOCKQUOTE>
<BLOCKQUOTE TYPE=CITE>
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John Bonesio<BR>
Commercial Linux Solutions<BR>
john.bonesio@xilinx.com<BR>
(408) 879-5569
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