TLB Miss booting linux kernel on ppc 405

David Baird dhbaird at
Thu Feb 14 04:17:13 EST 2008

On Feb 13, 2008 9:50 AM, Ricardo Ayres Severo <severo.ricardo at> wrote:
> Hi All,
> I'm using kernel 2.6.24 and when it comes to line 826 on the file
> arch/ppc/kernel/head_4xx.S it gives a TLB Miss.
> arch/ppc/kernel/head_4xx.S
> 823 start_here:
> 824
> 825         /* ptr to current */
> 826         lis    r2,init_task at h
> 827         ori    r2,r2,init_task at l

I am just curious: how did you find that you have TLB miss on that
line?  Is it an Instruction TLB miss or a Data TLB miss?

Can you paste a dump of your registers (in XMD, rrd and srrd)?

I was having TLB misses awhile back due to some other problems, but
never had any on that line though.

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