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Implement at least a bit of isa_intr_alloc().

This commit is contained in:
leo 1999-10-21 15:26:57 +00:00
parent 3fd4c8b3b8
commit 6b31bde1bb
1 changed files with 45 additions and 3 deletions
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48
sys/arch/atari/isa/isa_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: isa_machdep.c,v 1.13 1999/08/06 08:27:47 leo Exp $ */
/* $NetBSD: isa_machdep.c,v 1.14 1999/10/21 15:26:57 leo Exp $ */
/*
* Copyright (c) 1997 Leo Weppelman. All rights reserved.
@ -130,6 +130,9 @@ isa_attach_hook(parent, self, iba)
* - irq <= 6 -> slot 1
* - irq > 6 -> slot 2
*/
#define SLOTNR(irq) ((irq <= 6) ? 0 : 1)
static isa_intr_info_t iinfo[2] = { { -1 }, { -1 } };
static int iifun __P((int, int));
@ -181,6 +184,45 @@ int sr;
return 1;
}
/*
* XXXX
* XXXX Note that this function is not really working yet! The big problem is
* XXXX to only generate interrupts for the slot the card is in...
*/
int
isa_intr_alloc(ic, mask, type, irq)
isa_chipset_tag_t ic;
int mask;
int type;
int *irq;
{
isa_intr_info_t *iinfo_p;
int slot, i;
/*
* The Hades only supports edge triggered interrupts!
*/
if (type != IST_EDGE)
return 1;
#define MAXIRQ 10 /* XXX: Pure fiction */
for (i = 0; i < MAXIRQ; i++) {
if (mask & (1<<i)) {
slot = SLOTNR(i);
iinfo_p = &iinfo[slot];
if (iinfo_p->slot >= 0) {
*irq = i;
printf("WARNING: isa_intr_alloc is not yet ready!\n");
return 0;
}
}
}
return (1);
}
void *
isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg)
isa_chipset_tag_t ic;
@ -198,10 +240,10 @@ isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg)
if (type != IST_EDGE)
return NULL;
slot = (irq <= 6) ? 0 : 1;
slot = SLOTNR(irq);
iinfo_p = &iinfo[slot];
if (iinfo_p->slot > 0)
if (iinfo_p->slot >= 0)
panic("isa_intr_establish: interrupt was already established\n");
ihand = intr_establish((slot == 0) ? 3 : 15, USER_VEC, 0,