Messages in this thread | | | Date | Thu, 02 Jan 2003 08:30:18 -0800 | From | george anzinger <> | Subject | Re: switching to interrupt contex when no interrupts |
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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 majordomo@vger.kernel.org > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > Please read the FAQ at http://www.tux.org/lkml/ > > > > -- > > George Anzinger george@mvista.com > > 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 majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > -- > George Anzinger george@mvista.com > 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 majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
-- George Anzinger george@mvista.com 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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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