Thread (1 message) 1 message, 1 author, 2007-10-22

Re: ppc manual paging question

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2007-10-22 07:34:47

Possibly related (same subject, not in this thread)

Sorry I didn't realized that. I've finished looking pem64b.pdf, but it's 
almost nothing like in ppc 4xx/44x.
You'll have to get yourself a 44x manual :-)
quoted
It's a software loaded TLB, you'll have to put translations in the TLB
yourself. You'll need to design your own data structures for that, tho
you can use a page table for tracking, like we do in linux, and then
have your own TLB miss handler to fill the TLB from that.
OK, Shall I look for the DataTLBError code in head.S? I realized that I've got 
DataTLBError sometimes via BDI2000/kgdb (the fault address is within 
DataTLBError), Shall I should also look for arch/ppc/mm/fault.c?
head_44x.S is where you'll find some guidance
quoted
Your initial code probably need to bolt a TLB entry for the kernel
itself.
I don't understand this clearly, how can I do this?
Well, you insert a TLB entry manually and avoid replacing it later on

Ben.
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