IBM 750GX SMP on Marvell Discovery II or III?
dan at embeddededge.com
Wed May 12 01:46:07 EST 2004
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.
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