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Allow the interrupt allocated to the PCIC to be tuned from the kernel

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environment by setting the variable machdep.pccard.pcic_irq.  If
the IRQ is invalid, the PCIC will run in polled mode.
This commit is contained in:
Mike Smith 1999-01-29 01:18:15 +00:00
parent 7f1050341c
commit 7546e83ec1
1 changed files with 13 additions and 1 deletions
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14
sys/pccard/pcic.c
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@ -526,7 +526,7 @@ int
pcic_probe(void)
{
int slotnum, validslots = 0;
u_int free_irqs;
u_int free_irqs, desired_irq;
struct slot *slt;
struct pcic_slot *sp;
unsigned char c;
@ -716,7 +716,19 @@ pcic_probe(void)
* then attempt to get one.
*/
if (pcic_irq == 0) {
pcic_imask = soft_imask;
/* See if the user has requested a specific IRQ */
if (getenv_int("machdep.pccard.pcic_irq", &desired_irq))
/* legal IRQ? */
if ((desired_irq >= 1) && (desired_irq <= ICU_LEN) &&
((1ul << desired_irq) & soft_imask))
pcic_imask = 1ul << desired_irq;
else
/* illeagal, disable use of IRQ */
pcic_imask = 0;
pcic_irq = pccard_alloc_intr(free_irqs,
pcicintr, 0, &pcic_imask, NULL);
if (pcic_irq < 0)