Heikki Lindholm wrote:
Niklaus Giger kirjoitti:
Hi
I tried to use the FIT (Fixed Interrupt Timer) on my PPC405GPr board,
which uses 0x1010 as its interrupt vector in a user space
(vxworks-skin) application.
<..>
RT_INTR FITnterrupt;
res = rt_intr_create(&FITnterrupt, 0, 0x1010, I_NOAUTOENA);
<..>
But I got -22 EINVAL as error.
Could somebody please tell me, what is wrong with my example.
The 0x1010 is the HW interrupt vector, but the argument should be the
interrupt _line_. Besides, last time I checked, the ppc405 FIT isn't
even 'wired' in the kernel; actually, there's no space for the interrupt
prologue code, which basically results that no handler is called when
the FIT interrupt occurs.
Yes, in head_4xx.c there is the following note:
/* NOTE:
* FIT and WDT handlers are not implemented yet.
*/
But the relevant code could be copied from the PIT interrupt.
/* 0x1000 - Programmable Interval Timer (PIT) Exception */
START_EXCEPTION(0x1000, Decrementer)
NORMAL_EXCEPTION_PROLOG
lis r0,[EMAIL PROTECTED]
mtspr SPRN_TSR,r0 /* Clear the PIT exception */
addi r3,r1,STACK_FRAME_OVERHEAD
#ifdef CONFIG_IPIPE
EXC_XFER_IPIPE(0x1000, __ipipe_grab_timer)
#else /* !CONFIG_IPIPE */
EXC_XFER_LITE(0x1000, timer_interrupt)
#endif /* CONFIG_IPIPE */
and modified accordingly.
Wolfgang.
Wolfgang.
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