[U-Boot] Installing Linux kernel, nothing to execute in RAM...

[Simon Boman]

2008/11/27 Simon Boman <simon.boman at gmail.com>:
> 2008/11/26 Simon Boman <simon.boman at gmail.com>:
>> Hi!
>>
>> I have a modifed MPC8360 platform with a U-boot git-version from October.
>> Now I'm trying to install a Linux kernel and everything looks fine
>> until it starts to execute the kernel in RAM, there is only some bad
>> assembler instructions and then a lot of Invalid Opcode. If I look at
>> the log_buf there is nothing interesting there.
>>
>> bootm fc010000 - fc008000
>> ## Booting kernel from Legacy Image at fc010000 ...
>>   Image Name:   Linux-2.6.22
>>   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
>>   Data Size:    773535 Bytes = 755.4 kB
>>   Load Address: 00000000
>>   Entry Point:  00000000
>>   Verifying Checksum ... OK
>> ## Flattened Device Tree blob at fc008000
>>   Booting using the fdt blob at 0xfc008000
>>   Uncompressing Kernel Image ... OK
>>   Loading Device Tree to 00ff6000, end 00ffff06 ... OK
>>
>> ->printenv
>> ramboot=setenv bootargs root=/dev/ram rw console=$consoledev,$baudrate
>> $othbootargs;tftp $ramdiskaddr $ramdiskfile;tftp $loadaddr
>> $bootfile;tftp $fdtaddr $fdtfile;bootm $loadaddr $ramdiskaddr $fdtaddr
>> nfsboot=setenv bootargs root=/dev/nfs rw nfsroot=$serverip:$rootpath
>> ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname:$netdev:off
>> console=$consoledev,$baudrate $othbootargs;tftp $loadaddr
>> $bootfile;tftp $fdtaddr $fdtfile;bootm $loadaddr - $fdtaddr
>> baudrate=115200
>> loads_echo=1
>> loadaddr=200000
>> consoledev=ttyS0
>> ramdiskaddr=1000000
>> ramdiskfile=ramfs.83xx
>> netretry=no
>> ethrotate=no
>> fdtfile=mpc8360epaw.dtb
>> uImage_offset=FC010000
>> fdt_offset=FC008000
>> filesize=492F13
>> ramdisk_offset=FC160000
>> fdtaddr=fc008000
>> stdin=serial
>> stdout=serial
>> stderr=serial
>> kerneladdr=fc010000
>> bootcmd=setenv bootargs root=/dev/ram rw console=ttyS0,115200 bootm
>> fc010000 - fc008000
>> bootargs=root=/dev/ram rw console=ttyS0,115200 bootm fc010000 - fc008000
>>
>>
>> I'm not quite sure if this is a U-boot problem or Linux problem, if
>> not I apologise.
>>
>> TIA
>> Simon
>>
>
> Hi again!
>
> I have also tried to boot with the kernel image that Freescale
> provided from their homepage, but even with that I just get "Program
> Exception" when it starts to execute the kernel in RAM. So it seems
> that I have made something wrong in the U-boot.. any ideas?
> /Simon
>

Hey!

I have now figured out that the linux kernel is copied correctly to
the RAM except the 0x1000 bytes. I have compared the vmlinux.bin.17136
file which I extracted from the vmlinux.bin.gz file.
Is it something I have missed when everything seems correct except the
beginning of RAM?

Thanks
Simon