TLB and CSSBAR problems with MPC8540 and BDI2000

Dan Malek dan at
Sat Jan 10 04:54:33 EST 2004

Fahd Abidi wrote:

> I think my problem is all centered around TLB's and the CCSRBAR.

Yes, it is.

The debug control registers are part of the CCSRBAR space.  The
BDI2000 tracks modifications it makes if the space is moved, however,
if your software moves that space the BDI2000 doesn't know it and
can't access the registers.

If you are debugging code, like u-boot here, you have to make
several code modifications so the CCSR space isn't moved during your
debugging (among other things).

	-- Dan

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