[PATCH 2/10 v2] Add the MPC8641 HPCN platform files.

[Zhang Wei-r63237]

Hi, 
> > > +	/* Alloc mpic structure and per isu has 16 INT entries. */
> > > +	mpic1 = mpic_alloc(OpenPIC_PAddr,
> > > +			MPIC_PRIMARY | MPIC_WANTS_RESET | 
> MPIC_BIG_ENDIAN,
> > > +			16, MPC86xx_OPENPIC_IRQ_OFFSET, 0, 250,
> > > +			mpc86xx_hpcn_openpic_initsenses,
> > > +			sizeof(mpc86xx_hpcn_openpic_initsenses),
> > > +			" MPIC     ");
> > > +	BUG_ON(mpic1 == NULL);
> > > +
> > > +	/* 48 Internal Interrupts */
> > > +	mpic_assign_isu(mpic1, 0, OpenPIC_PAddr + 0x10200);
> > > +	mpic_assign_isu(mpic1, 1, OpenPIC_PAddr + 0x10400);
> > > +	mpic_assign_isu(mpic1, 2, OpenPIC_PAddr + 0x10600);
> > 
> > I haven't looked in detail at your memory map, but do you need 
> > separate ISUs ? They seem to be quite close together to me... Also, 
> > you should invent properties in the mpic node for some of those 
> > things, like big-endian (like apple does) indicating it's a 
> big endian 
> > openpic, etc... If you manage to get close enough to spec & common 
> > usage, you might not even need your own init function at all in the 
> > future.
> 
> OK.  We'll work in that direction, but incrementally.
> 
> > > +	/* 16 External interrupts */
> > > +	mpic_assign_isu(mpic1, 3, OpenPIC_PAddr + 0x10000);
> > 
> > That looks like you used ISUs in order to "re-order" them... why ?
> 
> Heck if I know.  We'll have to ask around some here... :-)

Re-ordering the interrupt is just fit for the practice from MPC85xx platform 
and legacy OpenPIC interrupts order. We put 16 i8259 interrupts to first 0-15
Position, 48 MPC86xx processor internel interrupts to 16-63 and 16 MPC86xx 
External interrupts to 64-79.

Thanks for your feedback!

Best Regards,
ZHANG WEI