The main reason for upgrading pmon should be that new pmon uses a new way to 
pass information to the kernel(we have defined a specification for this, ). I 
have  a rough idea to avoid upgrading pmon: write a little app for pmon and use 
it to fill the information tables then load new kernels with them. Since pmon 
support load and run an elf app compiled for it,  it should be viable and safe. 
But recent days we don't have  resources to do it, might try later.


The mentioned spec:  
http://wiki.loongnix.org/index.php/%E5%9B%BA%E4%BB%B6%EF%BC%8D%E5%86%85%E6%A0%B8%E6%8E%A5%E5%8F%A3%E8%A7%84%E8%8C%83.
 
http://ftp.loongnix.org/doc/05spec/%E9%BE%99%E8%8A%AFCPU%E5%BC%80%E5%8F%91%E7%B3%BB%E7%BB%9F%E5%9B%BA%E4%BB%B6%E4%B8%8E%E5%86%85%E6%A0%B8%E6%8E%A5%E5%8F%A3%E8%AF%A6%E7%BB%86%E8%A7%84%E8%8C%83V1R21.pdf
Pity that they are written in Chinese, maybe you can use google translator to 
understand most of it.


Regards
 
------------------ Original ------------------
From:  "David Kuehling"<dvdkh...@posteo.de>;
Date:  Wed, Jan 20, 2016 08:30 PM
To:  "loongson-dev"<loongson-dev@googlegroups.com>; 

Subject:  Re: [loongson-dev] Using latest Debian Loongson-3 kernels on aXingHuo 
3A "Spark"

 
>>>>> "Unknown" == Unknown  <liushi...@gmail.com> writes:

>> > I think a safe way to try is use a ram version pmon(make tgt=ram) >
>> first. The ram version can be loaded from disk or network at old >
>> pmon > command line. If the functionality is ok, the updating of pmon
>> > itself > is quite safe.
>> 
>> Thanks for the reply.
>> 
>> "make tgt=ram" means I'd have to recompile PMON from sources?  Isn't
>> the PMON version for Loongson3A/mini-ITX closed-source [1]?  All the
>> recent source-links I could find are not working any more [2] (and
>> they may not even have the code for the mini-itx board, if I read the
>> mail correctly).

> http://mirrors.ustc.edu.cn/loongson/pmon/updates.lemote.com/files/uploa
> d/lm/firmware/pmon/

Thanks, this is exactly what I was looking for.  Got myself a copy of
the sources and looking forward to playing around with RAM-only version
of PMON.

cheers,

David
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