Re: [Xenomai] Adeos I-Pipe patch problem on vendor-specific kernel

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 10/04/2012 07:09 PM, Gilles Chanteperdrix wrote:

> On 10/04/2012 06:57 PM, Wayne Warren wrote:
>> Gilles,
>>
>> Thanks for your help!
>>
>> The ArmPorting guide is helpful, but unfortunately the first tip and
>> trick did not reveal any boot messages. I had to add a function
>> declaration for "printascii" to get the code to compile. I have
>> CONFIG_DEBUG_KERNEL, CONFIG_DEBUG_LL, and CONFIG_EARLY_PRINTK enabled
>> and have passed the boot parameter "earlyprintk" when attempting to
>> boot. 
> 
> Either you enable CONFIG_EARLY_PRINTK and pass earlyprintk on the
> command line, that is the "new" way.
> 
> Or, you do the printascii in printk trick, that is the "old" way.
> 
> If you do both, you should see everything printed twice.
> If you do not see anything, it probably means that printascii does not
> work for your platform. To get it working, you have to look at
> arch/arm/your-machine/include/mach/debug-macro.S
> And of course, your kernel has to be compiled for only one board, if the
> UART used by these macros depends on the board.


Ah, if it is an OMAP based processor, you need to add a call to
_DEBUG_LL_ENTRY for your processor in
arch/arm/plat-omap/include/plat/uncompress.h, it may be what is missing.


-- 
                                                                Gilles.