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Add isa_intr_alloc() for isapnp support.

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This commit is contained in:
tsutsui 2003-06-14 19:11:40 +00:00
parent 792ce8fe0d
commit afa910a4ed
2 changed files with 41 additions and 2 deletions
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4
sys/arch/arc/include/isa_machdep.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: isa_machdep.h,v 1.7 2003/05/09 23:51:26 fvdl Exp $ */
/* $NetBSD: isa_machdep.h,v 1.8 2003/06/14 19:11:40 tsutsui Exp $ */
/* $OpenBSD: isa_machdep.h,v 1.5 1997/04/19 17:20:00 pefo Exp $ */
/*
@ -119,6 +119,8 @@ struct arc_isa_bus {
#define isa_mappage(m, o, p) \
_isa_mappage((m), (o), (p))
int isa_intr_alloc(isa_chipset_tag_t, int, int, int *);
void sysbeepstop(void *);
void sysbeep(int, int);

39
sys/arch/arc/isa/isabus.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: isabus.c,v 1.20 2003/05/25 14:00:15 tsutsui Exp $ */
/* $NetBSD: isabus.c,v 1.21 2003/06/14 19:11:41 tsutsui Exp $ */
/* $OpenBSD: isabus.c,v 1.15 1998/03/16 09:38:46 pefo Exp $ */
/* NetBSD: isa.c,v 1.33 1995/06/28 04:30:51 cgd Exp */
@ -488,3 +488,40 @@ sysbeep(pitch, period)
beeping = last_period = period;
callout_reset(&sysbeep_ch, period, sysbeepstop, NULL);
}
int
isa_intr_alloc(isa_chipset_tag_t c, int mask, int type, int *irq_p)
{
int irq;
int maybe_irq = -1;
int shared_depth = 0;
mask &= 0x8b28; /* choose from 3, 5, 8, 9, 11, 15 XXX */
for (irq = 0; mask != 0; mask >>= 1, irq++) {
if ((mask & 1) == 0)
continue;
if (intrtype[irq] == IST_NONE) {
*irq_p = irq;
return 0;
}
/* Level interrupts can be shared */
if (type == IST_LEVEL && intrtype[irq] == IST_LEVEL) {
struct intrhand *ih = intrhand[irq];
int depth;
if (maybe_irq == -1) {
maybe_irq = irq;
continue;
}
for (depth = 0; ih != NULL; ih = ih->ih_next)
depth++;
if (depth < shared_depth) {
maybe_irq = irq;
shared_depth = depth;
}
}
}
if (maybe_irq != -1) {
*irq_p = maybe_irq;
return 0;
}
return 1;
}