Hi Gabe,
Sorry for the mess and thanks a lot for your help!
Regards,
Li
On Mon, Jul 9, 2018 at 2:58 PM, Gabe Black <gabebl...@google.com> wrote:
> Hi Ryan. Please don't resend an email to the gem5 list. If you're email
> hasn't gotten a response yet and you want to make sure it hasn't been
> missed, you can just reply to the original. Also, please use gem5-users for
> these sorts of questions. The devs will still see the email, and so will
> more people that might be able to help, or might benefit from the answer.
>
>
> The trigger mode registers are a bank of registers which report for each
> of the 256 vectors what the trigger mode was (edge or level) for the
> accepted/pending interrupt on that vector. They're similar to the ISR and
> IRR registers which mark whether an interrupt is in service or has been
> requested. I'm not sure what the i8254 driver needs that info for, but
> apparently it's trying to read that register which has never been
> implemented, probably because nothing has tried to use it before. I think
> the information needed to fill in that register is available in the x86
> local APIC implementation, so it should be relatively straightforward to
> plumb it into place, although you might need to study the code a bit to
> figure out exactly how. Alternatively, if you can figure out what that
> driver is using the value it gets for, you might be able to just locally
> hard code the local APIC to return an value that will give the right
> behavior.
>
> Gabe
>
> On Fri, Jul 6, 2018 at 5:11 PM Ryan Wang <ryan.jb.w...@gmail.com> wrote:
>
>> Hi, All, (Particularly to Gabe)
>> I was trying to bring up NIC(from i8254xGBe.cc) in a kernel (4.9) for x86
>> system. However I got the panic in interrupts.cc as follows:
>>
>> panic("Local APIC Trigger Mode registers are unimplemented.\n");
>>
>> which was called in function readReg().
>>
>> It happens because the reg value is 26, which falls between
>> APIC_TRIGGER_MODE(0) and APIC_TRIGGER_MODE(15) (25 and 40).
>>
>> Do you think if I should try to implement this part or I missed
>> something in the configuration?
>>
>> Regards,
>> Ryan
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>
>
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