[BUG] Dual HyperSPARC module support

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

        Hello,

	I have installed NetBSD 4.0 on several SS20's and rebuilt a SMP kernel 
without any trouble. I have seen a very strange panic when I use dual 
RT626 (two HyperSPARC's on the same MBus module).

With 2 SuperSPARC-II (SM71) -> OK
With 2 HyperSPARC (RT626) in two modules -> OK
With 2 HyperSPARC (RT626) in one module -> I randomly obtain NMI 
interrupt error.

	I have tested with four different SS20's with and without HIGHMEM (and 
SUNvts does not report any errors on this hardware). This bug only 
occurs when two CPU share the same Mbus slot.

        Regards,

        JKB