Re: Amiga Memory map

[<gri...@ps...>]

> >$E90000 -	$EFFFFF		64K Autoconfig slots
> >$F00000 -	$FFFFFF		ROM space
> 
> Hmmm.  This is where the CSPPC SCSI is located.  This seems to be in the
> wrong spot?  

Doesn't have to be as the CS-PPC does the initial bootstrapping before
kickstart is started (eg. the pre-boot menu of the CyberStorm). So I guess
it would be logical to find it there.

> Does the APUS kernel mark this memory as read only?

Doesn't look like it.

In the 2.2.10 kernel in arch/ppc/mm/init.c it reads:

setbat(1, zTwoBase,   0x00000000, 0x01000000, IO_PAGE);

Which seems to indicate that the entire 16Mb lower block from 0x00000000
up to 0x01000000 is mapped to 0x80000000 as IO_PAGE, which expands
to:

	PAGE_NO_CACHE
	PAGE_GUARDED
	PAGE_RW

Not sure what 'GUARDED' is. The others should be self-explanatory.

So CS-PPC access for you should probably happen to/from 0x80F40000+offset.
(should be the same as ZTWO_VADDR(F40000 + offset))

								Bye, Arno.

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