Hi Ali,
Thank you for your patience.
I have read the section II-B of alpha architecture handbook. I know alpha
uses multilevel Page Table structure.
As you said, on a TLB miss the PAL code searches the page table for the
missing entry. I found the multilevel page table lookup function is
implemented in vtophys.cc(AlphaISA::kernel_pte_lookup()). But on a TLB
miss, this function is not called. So I am confused about how the PAL
code gets the appropriate entry?
Thanks.
Tracy
> Briefly, on a TLB miss the PAL code searches the page table for the
> missing entry, when it finds the appropriate entry it writes to an
> Internal Processor Register (IPR) that causes the entry to be
> inserted into the TLB. Section II-B Chapter 3 of the Alpha
> Architecture Handbook provides the particular details of the process.
>
> Ali
>
> On Feb 5, 2007, at 3:27 PM, [EMAIL PROTECTED] wrote:
>
>> Hi,
>>
>> Now I am trying to add some new virtual to physical address
>> translation
>> algorithm in full system.I know this functionality is done in tlb.cc,
>> but I don't know how the TLB is build up, which means how TLB entries
>> are added into the table?
>> I find AlphaRegFile::MiscRegFile::setIpr() is called to insert a
>> new
>> entry. Can anyone explain this process for me?
>> Thank you very much.
>>
>> Tracy
>>
>>
>>> translate() in tlb.cc implements an alpha like TLB. So it does
>>> virtual to physical translation for the guest.
>>> vtophys() converts a virtual address for the guest into a virtual
>>> address for the host.
>>> Ali
>>>
>>> On Jan 22, 2007, at 2:26 PM, [EMAIL PROTECTED] wrote:
>>>
>>>> Hi all,
>>>>
>>>> I find two virtual to physical address translation functions in
>>>> M5:
>>>> One is translate() defined in AlphaITB/AlphaDTB class in tlb.cc,
>>>> the other one is vtophys() defined in vtophys.cc.
>>>>
>>>> Does anyone know which one is for simulated virtual address to
>>>> simulated physical address translation? And which on is for
>>>> simulated
>>>> virutal address to host physical address translation?
>>>>
>>>> Thanks!
>>>>
>>>> Tracy
>>>>
>>>>
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