Re: [rtl] Q: reentrant ISR's

[yodaiken@fsmlabs.com]

On Mon, Apr 10, 2000 at 02:24:49PM +0200, Roland Lang wrote:
> Hi.
> 
> I have setup a ISR on the 8254 Timer Hardware Interrupt 0.
> I am not using the scheduler. I need to program a detection
> mechanism whether the ISR is again called before the last one has 
> terminated. I need to do this because of a compatibility to 
> another system. But it seems the HW Interrupts are turned off 
> while the ISR is running so that this detection doesn't work.
> 
> My Question: How can I generate a reentrant ISR using RTL2.2?

You must use 
          rtl_hard_enable_irq(0); /* on intel boards, re-enables on 8259*/
          rtl_allow_interrupts(); /* does a hard sti */


> 
> Thanks for any help.
> Kind regards, Roland.
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