TLB and CSSBAR problems with MPC8540 and BDI2000
Dan Malek
dan at embeddededge.com
Thu Jan 15 05:39:09 EST 2004
Milliorn Gary-rxcr80 wrote:
> The TLB1 issue is due to the MPC85x0 errata "CPU4"; there's a s/w
> workaround. It's nice if BDI fixes it for you, but seems like it would
> not be necessary.
The BDI doesn't fix anything. I was just expecting the 'invalidate
protect' to actually do that. :-) I set up several TLB1 entries during
the BDI initialization prior to debugging the boot rom. The boot rom
then does a flash invalidate and loads up a "new" set of TLB1 entries.
I was expecting the values I set with the BDI to co-exist with the
new ones, but that doesn't seem to be the case.
Thanks.
-- Dan
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