Re: [linuxsh-dev] Some modifications to the kernel in the CVS

[Mitch D. <mj...@au...>]

Dear Niibe-san,

NIIBE Yutaka wrote:
> 
> pi...@li... wrote:
> >
> > I was planning to create a "7707 processor" entry, or leave 7709
> > and create a "7707-only peripherals" config entry somewhere else,
> > once we start have working drivers.
> 
> Please note that we will be able to use (or it works already? I
> haven't tested yet) kernel modules.  If we use modules for driver,
> there's no difference for "vmlinux" between SH7707's and SH7709's.

Yes.  This job of loading the 7707 modules can be done by the
user-land boot process.  (Takes on average 2k more per module,
but I guess that's ok).

> It's OK for me to have some config option for "short cut".  For
> example, short-cut "SH7707" which means the combination of:
> 
>         CPU Type:
>                 SH7707/SH7709/SH7709A/SH7729
>         Enable SH7707 only drivers

While the kernel code itself would be the same, I think it's
worth having some sort of configuration convenience option,
such that by saying you "have a 7707" or "have a certain
companion chip", the configuration process only presents you
with the (y/n) question for peripherals you actually have.

> I think that introducing new CPU type option for SH7707 is not
> relevant.

The CPU core is the same, so no need for a new CPU type.  But
the available peripherals depend very much on what CPU/companion
chip you're using.  Being able to select this would be a useful
filter of configurable options.

Is this what you mean?

Regards,

Mitch.
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