[linux-dvb] Re: Linux on SAT receivers

[Holger Waechtler <holger@convergence.de>]

Felix Domke wrote:
> Stramaglia, Carlo wrote:
>
> > Dear Holger,
> >
> > thanks for your info.
> > I find very interesting the statement "For all other boxes you can simply
> > build your own kernel".
> >
> > Are you saying that Linux can boot on every STB by just recompiling the
> > Kernel?
> >  
> basically, there are a few things to consider:
>
> - The available memory.
> This might the criterium where most boxes faill. Althought some 
> uclinux-variants run with 4MB of ram, it gets useful starting with 16MB. 
> For example, the dbox2 has 32MB RAM (+2MB for Framebuffer and demux)
For low-memory systems RT-alike operating systems like eCos are an 
interesting alternative.


> - The used CPU-core.
> Unless you have years of time, you have to use a cpu-architecture  where 
> linux is already ported for, for example MIPS, PowerPC or x86.
> As the STI55xx-Series have a ST20-based CPU, you would even have to 
> implement support in the gnu-toolchain AND port the kernel to a 
> completely new architecture. This is REALLY HARD work, compared to 
> "just" porting to a specific cpu. For example, for the dbox2, where the 
> MPC823 (66MHz embedded PowerPC) is used, there was already support in 
> the kernel.
ack. (I had mostly the mainstream STB processors in my mind when I wrote 
the previous main, so I forgot the ST20, sorry. But from the technical 
point of view this is an interesting processor;)

Holger



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