[ECOS] Re: Re[ECOS] dboot hangs while loading kernel

venkatch venkatch@gmail.com
Wed Sep 19 13:49:00 GMT 2012

Hi Ragavendra,

 I have observed exactly the same issue  when I tried to load kernel onto
MIPS based Atheros boards. My board also uses Redboot as the bootloader. If
you have already resolved this issue, can you please post how you resolved

Thanks & Regards

ragavendrapec wrote:
> Hi
> This is my scenario. I am using Redboot bootloader for my mips-32 board
> from Atheros. I am able to boot into the redboot prompt and flash the
> kernel and filesystem. However when i try to boot it stops after saying
> Now booting linux kernel:
>  Base address 0x80050000 Entry 0x8020cb90
>  Cmdline : console=ttyS0,115200 root=31:02 rootfstype=jffs2
> init=/sbin/init
> The kernel doesn't load after that. What could be the issue? Below is my
> fconfig -l output
> Run script at boot: true
> Boot script:
> .. fis load -d vmlinux
> .. exec
> Boot script timeout (1000ms resolution): 2
> Use BOOTP for network configuration: false
> Gateway IP address:
> Local IP address:
> Local IP address mask:
> Default server IP address:
> Console baud rate: 115200
> GDB connection port: 9000
> Force console for special debug messages: false
> Network debug at boot time: false
> The fis list output is as below
> Name              FLASH addr  Mem addr    Length      Entry point
> RedBoot           0xBF000000  0xBF000000  0x00040000  0x00000000
> vmlinux           0xBF040000  0x80060000  0x00150000  0x8020CB90
> filesystem        0xBF190000  0x80500000  0x00600000  0x00000000
> FIS directory     0xBF7E0000  0xBF7E0000  0x0000F000  0x00000000
> RedBoot config    0xBF7EF000  0xBF7EF000  0x00001000  0x00000000
> During bootup it correctly executes the boot script, however the system
> hangs and doesn't print anything after that. I am using a NOR flash and
> the linux kernel i've compiled is 2.6.31 version. I've tried even a lower
> linux version but still the same issue.
> The commands i used for flashing the bootloader, kernel and filesystem are
> load -r -b 0x80500000 redboot.rom
> fis write -f 0xbf000000 -l 0x40000 -b 0x80500000
> load -r -b 0x80500000 vmlinux.bin.gz
> fis create -b 0x80500000 -e 0x8020cb90 -r 0x80060000 -l 0x150000 -f
> 0xbf040000 vmlinux
> the 0x8020cb90 was present in the vmlinux.info file.
> load -r -b 0x80500000 <file_name>
> fis create -b 0x80500000 -l <length_of_the_file> -e 0 filesystem
> Tftp and the rest are working fine, as it says Raw file loaded after
> running the load command, and fis create also works fine.
> Kindly suggest some directions where I can find info regarding this. Plz
> help.
> Regards
> R.Vasanth Ragavendran.

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