On Monday 22 October 2007 16:04:14, Benjamin Herrenschmidt wrote：
> > Yup, I've found how does the kernel handle tlbs, I think the most
> > important thing is I forgot read/write the SPRN_SPRG3 register as _switch
> > does.
>
> SPRG3 is for use by the operating system for whatever you want... if yo
> Yup, I've found how does the kernel handle tlbs, I think the most important
> thing is I forgot read/write the SPRN_SPRG3 register as _switch does.
SPRG3 is for use by the operating system for whatever you want... if you
are copying linux code, then you probably indeed want to get that right
b
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> 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?
>
if you end up in fault.c (via c
On Monday 22 October 2007 15:34:24, Benjamin Herrenschmidt wrote：
> > 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 :-)
>
> > > It's a software loaded TLB, you'll have to put translations
> 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 :-)
> > 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 f
On Monday 22 October 2007 14:01:33, Benjamin Herrenschmidt wrote：
> > I'm porting an adeos nano kernel named xtratum (http://www.xtratum.org)
> > from x86 to ppc, I think I'm near the ending except the above problem.
> > xtratum is doing things like xen but it's much simpler (it's aimed for
> > rea
> I'm porting an adeos nano kernel named xtratum (http://www.xtratum.org) from
> x86 to ppc, I think I'm near the ending except the above problem. xtratum is
> doing things like xen but it's much simpler (it's aimed for realtime), it
> need provides memory space sperations for it's domains, so
On Monday 22 October 2007 12:50:52, Benjamin Herrenschmidt wrote：
> On Mon, 2007-10-22 at 12:03 +0800, Wang, Baojun wrote:
> > hi,
> >
> > I've got some qeustion about ppc(ppc44x) paging:
> >
> > how can I manually map a virtual address to a physical address through a
> > specific pgd? How does p
On Mon, 2007-10-22 at 12:03 +0800, Wang, Baojun wrote:
> hi,
>
> I've got some qeustion about ppc(ppc44x) paging:
>
> how can I manually map a virtual address to a physical address through a
> specific pgd? How does ppc translate virt address to physical one? I think
> besides from tlb, the
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>
> I've got some qeustion about ppc(ppc44x) paging:
>
> how can I manually map a virtual address to a physical address through a
> specific pgd? How does ppc translate virt address to physical one? I think
> besides from tlb, the CPU will search the
hi,
I've got some qeustion about ppc(ppc44x) paging:
how can I manually map a virtual address to a physical address through a
specific pgd? How does ppc translate virt address to physical one? I think
besides from tlb, the CPU will search the page table entries via the pgd, can
I alter the
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