Re: IBM 750GX SMP on Marvell Discovery II or III?

On May 10, 2004, at 11:03 PM, Paul Mackerras wrote:

......According to page
2-63 of the MPC750 users manual: "Of the broadcast cache operations,
the MPC750 snoops only dcbz, regardless of the HID0[ABE] setting."

But, read the following sentence.  "Any bus activity caused by other
cache instructions results directly from performing the operation on
the MPC750 cache."  A dcbz has to be broadcast, others do not because
their operations appear just as standard load/store ops.

The only thing we should have to do in software is the icbi, which is
no big deal to broadcast.

My experience has been that MPC750s work in a SMP environment
on a 60x bus.  Maybe I was just lucky?  The way I read the manual,
they should work with a proper memory controller.

Thanks.


	-- Dan


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/