[oe] Kernel boot problems

[Andrea Adami]

On Thu, Jul 28, 2011 at 1:22 PM, Gary Thomas <gary at mlbassoc.com> wrote:
> On 2011-07-27 20:20, Bernard Mentink wrote:
>>
>> Hi Guys,
>>
>> I have got a bit further with my efforts to boot linux on an imx31 based
>> platform using u-boot.
>>
>> My console output is now:
>>
>> ----------------------------------------------------------------
>> uboot>  bootm 80100000
>> ## Booting kernel from Legacy Image at 80100000 ...
>>    Image Name:   Angstrom/2.6.36/mx31ads
>>    Created:      2011-07-28   2:03:27 UTC
>>    Image Type:   ARM Linux Kernel Image (uncompressed)
>>    Data Size:    1586172 Bytes = 1.5 MiB
>>    Load Address: 8f000000
>>    Entry Point:  8f000000
>>    Verifying Checksum ... OK
>>    Loading Kernel Image ... OK
>> OK
>>
>> Starting kernel ...
>>
>> Uncompressing Linux... done, booting the kernel.
>> -------------------------------------------------------------------
>>
>> So it seems to be getting to the 1st part of the kernel boot process,
>> then hangs (I presume the last line comes from kernel code.)
>> I don't know if the kernel is hanging, or if I don't have any more
>> serial out ....
>> I am passing "console=ttymxc0,115200" to the kernel ..
>> Can someone confirm:
>> A) If I have the correct Entry point, or does this need to be offset
>> into the kernel? ..
>> B) Is the serial console parameters correct?
>> C) What is the correct way to set up the memory map? (my ram starts at
>> 0x80000000, ends at 0x8fffffff)
>> D) Is there a way to debug initial kernel stuff with serial output?
>> In the above, I have decompressed the kernel to the top of the 256M ram,
>> but have only advertised 120M via the bootloader   ... for now, not
>> knowing what is correct and not wanting the kernel
>> to stomp all over itself running in ram.
>
<cut>

In answer to D) there is earlyprintk using a custom-compiled debug-kernel

Regards

Andrea