switching to interrupt contex when no interrupts
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:
Quoted 19 lines · george anzinger
Quoted 17 lines · arun4linux wrote:
Hello,
<> > interrupt handler.
Quoted 1 line
Quoted 1 line
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.Quoted 1 line
Quoted 1 line
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.
Quoted 7 lines
Quoted 3 lines
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
Quoted 51 lines
-g
Quoted 29 lines
Thanks & Warm Regards
Arun"John K Luebs" wrote:
Quoted 3 lines · 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_irqattached to the interrupt line that you are interested in installing a handler for.Quoted 2 lines
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
Quoted 7 lines
Buy Music, Video, CD-ROM, Audio-Books and Music Accessories from http://www.planetm.co.in
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High-res-timers:
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Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
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Signature · 13 lines
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!
Quoted 6 lines · arun4linux wrote:
Hello,
I used
asm volatile ("int 41");
That should be: asm volatile ("int $41");
Quoted 10 lines
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
0x29or 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
Quoted 107 lines
Warm Regards
Arun"george anzinger" wrote:
Quoted 19 lines · george anzinger
Quoted 17 lines · arun4linux wrote:
Hello,
<> > interrupt handler.
Quoted 1 line
Quoted 1 line
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.Quoted 1 line
Quoted 1 line
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.
Quoted 7 lines
Quoted 3 lines
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
Quoted 40 lines
-g
Quoted 29 lines
Thanks & Warm Regards
Arun"John K Luebs" wrote:
Quoted 3 lines · 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_irqattached to the interrupt line that you are interested in installing a handler for.Quoted 2 lines
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
Quoted 7 lines
Buy Music, Video, CD-ROM, Audio-Books and Music Accessories from http://www.planetm.co.in
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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/Quoted 11 lines
--
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/rmlGet 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!
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Please read the FAQ at http://www.tux.org/lkml/
Signature · 5 lines
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