Hello,
I'd like to force my kernel module to run at interrupt context at some specific points/time and then come back from interrrupt contex after executing that particular portion of code..
Is it possible?
If so, how to achieve this.
Have a nice time
Warm Regards
Arun
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arun4linux wrote:
>
> Hello,
>
> <<One is forced to run in interrupt context in an
> interrupt handler.
> >>Yes. But my requirement is to force my code to run in interrupt context.
>
> <<Possibility is undefined here because what you said makes no sense.
>
> You will get a better answer from the list if you describe what you are trying to do (in concrete terms), not how you think you might do it.
>
> >>My requirement is to simulate a PCI based controller and its behaviour in software. I knew the different type of interrupts and the timings my device produces.
>
> I need to simulate this PCI device, its interrupts in sequence and I have to process them in my driver software.
>
> Hope this make sense now.
>
> Anyway, my requrirement is to simulate the interrupts and process them in the interrupt context.
>
> It would be helpful, if anyone could help me how to do it.
> My idea is to use task queues and bottom halves for this. But I'd like to get clarified on simulating interrupts (rasing the process/task context to interrupt context) and its consequences.
>
Why simulate the interrupts when you can just program them?
On the x86 machine the "int x" instruction generates an
interrupt to irq "x"+32. You do need to be in kernel land
to do this, but then I assume that is not a problem.
-g
>
> Thanks & Warm Regards
> Arun
>
> "John K Luebs" wrote:
>
> On Sat, Nov 23, 2002 at 07:37:33AM +0530, arun4linux wrote:
> > Hello,
> >
> > I'd like to force my kernel module to run at interrupt context at some specific points/time and then come back from interrrupt contex after executing that particular portion of code..
>
> You seem to be over complexifying what interrupt context is. It is
> simply a generic term for a context that executes on account of an
> architecture interrupt. One is forced to run in interrupt context in an
> interrupt handler.
>
> You "run" in interrupt context by calling request_irq attached to the
> interrupt line that you are interested in installing a handler for.
>
> >
> > Is it possible?
>
> Possibility is undefined here because what you said makes no sense.
>
> You will get a better answer from the list if you describe what you are
> trying to do (in concrete terms), not how you think you might do it.
>
> Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
>
> Buy Music, Video, CD-ROM, Audio-Books and Music Accessories from http://www.planetm.co.in
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
George Anzinger [email protected]
High-res-timers:
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
george anzinger wrote:
>
> arun4linux wrote:
> >
> > Hello,
> >
> > <<One is forced to run in interrupt context in an
> > interrupt handler.
> > >>Yes. But my requirement is to force my code to run in interrupt context.
> >
> > <<Possibility is undefined here because what you said makes no sense.
> >
> > You will get a better answer from the list if you describe what you are trying to do (in concrete terms), not how you think you might do it.
> >
> > >>My requirement is to simulate a PCI based controller and its behaviour in software. I knew the different type of interrupts and the timings my device produces.
> >
> > I need to simulate this PCI device, its interrupts in sequence and I have to process them in my driver software.
> >
> > Hope this make sense now.
> >
> > Anyway, my requrirement is to simulate the interrupts and process them in the interrupt context.
> >
> > It would be helpful, if anyone could help me how to do it.
> > My idea is to use task queues and bottom halves for this. But I'd like to get clarified on simulating interrupts (rasing the process/task context to interrupt context) and its consequences.
> >
> Why simulate the interrupts when you can just program them?
> On the x86 machine the "int x" instruction generates an
> interrupt to irq "x"+32. You do need to be in kernel land
> to do this, but then I assume that is not a problem.
Uh, make that "x"-32, i.e. "int 34" give irq 2.
-g
>
> -g
>
> >
> > Thanks & Warm Regards
> > Arun
> >
> > "John K Luebs" wrote:
> >
> > On Sat, Nov 23, 2002 at 07:37:33AM +0530, arun4linux wrote:
> > > Hello,
> > >
> > > I'd like to force my kernel module to run at interrupt context at some specific points/time and then come back from interrrupt contex after executing that particular portion of code..
> >
> > You seem to be over complexifying what interrupt context is. It is
> > simply a generic term for a context that executes on account of an
> > architecture interrupt. One is forced to run in interrupt context in an
> > interrupt handler.
> >
> > You "run" in interrupt context by calling request_irq attached to the
> > interrupt line that you are interested in installing a handler for.
> >
> > >
> > > Is it possible?
> >
> > Possibility is undefined here because what you said makes no sense.
> >
> > You will get a better answer from the list if you describe what you are
> > trying to do (in concrete terms), not how you think you might do it.
> >
> > Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
> >
> > Buy Music, Video, CD-ROM, Audio-Books and Music Accessories from http://www.planetm.co.in
> >
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
>
> --
> George Anzinger [email protected]
> High-res-timers:
> http://sourceforge.net/projects/high-res-timers/
> Preemption patch:
> http://www.kernel.org/pub/linux/kernel/people/rml
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
George Anzinger [email protected]
High-res-timers:
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
Hello,
I used
asm volatile ("int 41");
in my code.
My card's irq number is 9.
I get the error message.
Error: suffix or operabds invalid for 'in'
This is the case, if I change the 41 to 0x29 or 29h.
Where can I get some documentation on using asm?
Warm Regards
Arun
"george anzinger" wrote:
george anzinger wrote:
>
> arun4linux wrote:
> >
> > Hello,
> >
> > <> > interrupt handler.
> > >>Yes. But my requirement is to force my code to run in interrupt context.
> >
> > <> >
> > You will get a better answer from the list if you describe what you are trying to do (in concrete terms), not how you think you might do it.
> >
> > >>My requirement is to simulate a PCI based controller and its behaviour in software. I knew the different type of interrupts and the timings my device produces.
> >
> > I need to simulate this PCI device, its interrupts in sequence and I have to process them in my driver software.
> >
> > Hope this make sense now.
> >
> > Anyway, my requrirement is to simulate the interrupts and process them in the interrupt context.
> >
> > It would be helpful, if anyone could help me how to do it.
> > My idea is to use task queues and bottom halves for this. But I'd like to get clarified on simulating interrupts (rasing the process/task context to interrupt context) and its consequences.
> >
> Why simulate the interrupts when you can just program them?
> On the x86 machine the "int x" instruction generates an
> interrupt to irq "x"+32. You do need to be in kernel land
> to do this, but then I assume that is not a problem.
Uh, make that "x"-32, i.e. "int 34" give irq 2.
-g
>
> -g
>
> >
> > Thanks & Warm Regards
> > Arun
> >
> > "John K Luebs" wrote:
> >
> > On Sat, Nov 23, 2002 at 07:37:33AM +0530, arun4linux wrote:
> > > Hello,
> > >
> > > I'd like to force my kernel module to run at interrupt context at some specific points/time and then come back from interrrupt contex after executing that particular portion of code..
> >
> > You seem to be over complexifying what interrupt context is. It is
> > simply a generic term for a context that executes on account of an
> > architecture interrupt. One is forced to run in interrupt context in an
> > interrupt handler.
> >
> > You "run" in interrupt context by calling request_irq attached to the
> > interrupt line that you are interested in installing a handler for.
> >
> > >
> > > Is it possible?
> >
> > Possibility is undefined here because what you said makes no sense.
> >
> > You will get a better answer from the list if you describe what you are
> > trying to do (in concrete terms), not how you think you might do it.
> >
> > Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
> >
> > Buy Music, Video, CD-ROM, Audio-Books and Music Accessories from http://www.planetm.co.in
> >
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
>
> --
> George Anzinger [email protected]
> High-res-timers:
> http://sourceforge.net/projects/high-res-timers/
> Preemption patch:
> http://www.kernel.org/pub/linux/kernel/people/rml
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
George Anzinger [email protected]
High-res-timers:
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
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arun4linux wrote:
>
> Hello,
>
> I used
>
> asm volatile ("int 41");
That should be: asm volatile ("int $41");
>
> in my code.
> My card's irq number is 9.
> I get the error message.
>
> Error: suffix or operabds invalid for 'in'
>
> This is the case, if I change the 41 to 0x29 or 29h.
>
> Where can I get some documentation on using asm?
I use the info file that comes with gcc. In emacs it is
^Hi, then search for gcc. There is also an info program for
browsing the info stuff, but I don't use it so don't know
much about it.
-g
>
> Warm Regards
> Arun
>
> "george anzinger" wrote:
>
> george anzinger wrote:
> >
> > arun4linux wrote:
> > >
> > > Hello,
> > >
> > > <> > interrupt handler.
> > > >>Yes. But my requirement is to force my code to run in interrupt context.
> > >
> > > <> >
> > > You will get a better answer from the list if you describe what you are trying to do (in concrete terms), not how you think you might do it.
> > >
> > > >>My requirement is to simulate a PCI based controller and its behaviour in software. I knew the different type of interrupts and the timings my device produces.
> > >
> > > I need to simulate this PCI device, its interrupts in sequence and I have to process them in my driver software.
> > >
> > > Hope this make sense now.
> > >
> > > Anyway, my requrirement is to simulate the interrupts and process them in the interrupt context.
> > >
> > > It would be helpful, if anyone could help me how to do it.
> > > My idea is to use task queues and bottom halves for this. But I'd like to get clarified on simulating interrupts (rasing the process/task context to interrupt context) and its consequences.
> > >
> > Why simulate the interrupts when you can just program them?
> > On the x86 machine the "int x" instruction generates an
> > interrupt to irq "x"+32. You do need to be in kernel land
> > to do this, but then I assume that is not a problem.
>
> Uh, make that "x"-32, i.e. "int 34" give irq 2.
>
> -g
> >
> > -g
> >
> > >
> > > Thanks & Warm Regards
> > > Arun
> > >
> > > "John K Luebs" wrote:
> > >
> > > On Sat, Nov 23, 2002 at 07:37:33AM +0530, arun4linux wrote:
> > > > Hello,
> > > >
> > > > I'd like to force my kernel module to run at interrupt context at some specific points/time and then come back from interrrupt contex after executing that particular portion of code..
> > >
> > > You seem to be over complexifying what interrupt context is. It is
> > > simply a generic term for a context that executes on account of an
> > > architecture interrupt. One is forced to run in interrupt context in an
> > > interrupt handler.
> > >
> > > You "run" in interrupt context by calling request_irq attached to the
> > > interrupt line that you are interested in installing a handler for.
> > >
> > > >
> > > > Is it possible?
> > >
> > > Possibility is undefined here because what you said makes no sense.
> > >
> > > You will get a better answer from the list if you describe what you are
> > > trying to do (in concrete terms), not how you think you might do it.
> > >
> > > Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
> > >
> > > Buy Music, Video, CD-ROM, Audio-Books and Music Accessories from http://www.planetm.co.in
> > >
> > > -
> > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > > the body of a message to [email protected]
> > > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > > Please read the FAQ at http://www.tux.org/lkml/
> >
> > --
> > George Anzinger [email protected]
> > High-res-timers:
> > http://sourceforge.net/projects/high-res-timers/
> > Preemption patch:
> > http://www.kernel.org/pub/linux/kernel/people/rml
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
>
> --
> George Anzinger [email protected]
> High-res-timers:
> http://sourceforge.net/projects/high-res-timers/
> Preemption patch:
> http://www.kernel.org/pub/linux/kernel/people/rml
>
> Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
>
> Buy the best in Movies at http://www.videos.indiatimes.com
>
> Now bid just 7 Days in Advance and get Huge Discounts on Indian Airlines Flights. So log on to http://indianairlines.indiatimes.com and Bid Now!
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
George Anzinger [email protected]
High-res-timers:
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
<<That should be: asm volatile ("int $41");
>>I found it in some another vehicle, did the same and it worked.
Warm Regards
Arun
"george anzinger" wrote:
arun4linux wrote:
>
> Hello,
>
> I used
>
> asm volatile ("int 41");
That should be: asm volatile ("int $41");
>
> in my code.
> My card's irq number is 9.
> I get the error message.
>
> Error: suffix or operabds invalid for 'in'
>
> This is the case, if I change the 41 to 0x29 or 29h.
>
> Where can I get some documentation on using asm?
I use the info file that comes with gcc. In emacs it is
^Hi, then search for gcc. There is also an info program for
browsing the info stuff, but I don't use it so don't know
much about it.
-g
>
> Warm Regards
> Arun
>
> "george anzinger" wrote:
>
> george anzinger wrote:
> >
> > arun4linux wrote:
> > >
> > > Hello,
> > >
> > > <> > interrupt handler.
> > > >>Yes. But my requirement is to force my code to run in interrupt context.
> > >
> > > <> >
> > > You will get a better answer from the list if you describe what you are trying to do (in concrete terms), not how you think you might do it.
> > >
> > > >>My requirement is to simulate a PCI based controller and its behaviour in software. I knew the different type of interrupts and the timings my device produces.
> > >
> > > I need to simulate this PCI device, its interrupts in sequence and I have to process them in my driver software.
> > >
> > > Hope this make sense now.
> > >
> > > Anyway, my requrirement is to simulate the interrupts and process them in the interrupt context.
> > >
> > > It would be helpful, if anyone could help me how to do it.
> > > My idea is to use task queues and bottom halves for this. But I'd like to get clarified on simulating interrupts (rasing the process/task context to interrupt context) and its consequences.
> > >
> > Why simulate the interrupts when you can just program them?
> > On the x86 machine the "int x" instruction generates an
> > interrupt to irq "x"+32. You do need to be in kernel land
> > to do this, but then I assume that is not a problem.
>
> Uh, make that "x"-32, i.e. "int 34" give irq 2.
>
> -g
> >
> > -g
> >
> > >
> > > Thanks & Warm Regards
> > > Arun
> > >
> > > "John K Luebs" wrote:
> > >
> > > On Sat, Nov 23, 2002 at 07:37:33AM +0530, arun4linux wrote:
> > > > Hello,
> > > >
> > > > I'd like to force my kernel module to run at interrupt context at some specific points/time and then come back from interrrupt contex after executing that particular portion of code..
> > >
> > > You seem to be over complexifying what interrupt context is. It is
> > > simply a generic term for a context that executes on account of an
> > > architecture interrupt. One is forced to run in interrupt context in an
> > > interrupt handler.
> > >
> > > You "run" in interrupt context by calling request_irq attached to the
> > > interrupt line that you are interested in installing a handler for.
> > >
> > > >
> > > > Is it possible?
> > >
> > > Possibility is undefined here because what you said makes no sense.
> > >
> > > You will get a better answer from the list if you describe what you are
> > > trying to do (in concrete terms), not how you think you might do it.
> > >
> > > Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
> > >
> > > Buy Music, Video, CD-ROM, Audio-Books and Music Accessories from http://www.planetm.co.in
> > >
> > > -
> > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > > the body of a message to [email protected]
> > > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > > Please read the FAQ at http://www.tux.org/lkml/
> >
> > --
> > George Anzinger [email protected]
> > High-res-timers:
> > http://sourceforge.net/projects/high-res-timers/
> > Preemption patch:
> > http://www.kernel.org/pub/linux/kernel/people/rml
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to [email protected]
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
>
> --
> George Anzinger [email protected]
> High-res-timers:
> http://sourceforge.net/projects/high-res-timers/
> Preemption patch:
> http://www.kernel.org/pub/linux/kernel/people/rml
>
> Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
>
> Buy the best in Movies at http://www.videos.indiatimes.com
>
> Now bid just 7 Days in Advance and get Huge Discounts on Indian Airlines Flights. So log on to http://indianairlines.indiatimes.com and Bid Now!
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
George Anzinger [email protected]
High-res-timers:
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com
Buy the best in Movies at http://www.videos.indiatimes.com
Now bid just 7 Days in Advance and get Huge Discounts on Indian Airlines Flights. So log on to http://indianairlines.indiatimes.com and Bid Now!