Re: [linux-sh:01492] Re: [linuxsh-dev] Re: linux-2.4.1 kernel compilation errors

[Mitch D. <md...@po...>]

Jaswinder Singh wrote:
> 
> > Mitch Davis wrote:
> > And you MUST use some form of bootloader - it's not
> > possible to
> > jump directly to the kernel start after powerup.
> >
> 
> Can you please explain me why it is *not* possible to
> jump directly to the kernel start after powerup.

When the SuperH first boots, the only memory area which
it can access is area 0, which should contain ROM.  The areas
which contain RAM will not be available until the BSC settings
are programmed.  So a direct jump to the kernel would fail
because there would be no available RAM.

It's the job of the bootloader (no matter how small) to
program the BSC.

Regards,

Mitch.
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