Re: [Oslib-devel] irq_bind, int_bind etc

[Luca A. <luc...@em...>]

Hi Juras,

>   What's the difference between irq_bind and l1_irq_bind ?
irq_bind is a kl function: it supports the ``event interface'', and is
safer to use when you are doing multitasking.
l1_irq_bind is a lower level function (it directly accesses the xlib
mechanism that is used by irq_bind). If you use it, you will have less
overhead in interrupt management (you can save one indirection), but
things become tricky when you do multitasking.
 
>   what's the function's prototype which is called on an interrupt ?
for the low-level mechanism:
void handler(int i)	/* i is the interrupt number */
for the kl mechanism
void handler(void *p)
here, p should be a pointer to some user-defined data... Currently, it
is a pointer to an integer variable containing the irq number.

>   how to install a custom exception handler (e.g. for exc.13, GPF) while using kernel
>   library?
Currently, you have to use the lower-level call l1_exc_bind...
I think noone ever used the kl interface for exceptions, hence it is not
implemented... Of course, patches are accepted ;-)

				Luca
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