Re: sharing IRQ
KIYOHARA Takashi <kiyohara <at> kk.iij4u.or.jp>
2006-10-08 17:29:28 GMT
Hi! tsutsui-san,
From: Izumi Tsutsui <tsutsui <at> ceres.dti.ne.jp>
Date: Wed, 20 Sep 2006 18:07:09 +0900
> So, before implemente shared IRQ support code, we should
> know hardware specification around cobalt PCI, i.e.
> we should know which IRQ pins each PIN A-D lines are
> connected to. If each PIN A-D lines of the PCI slot
> are connected to independent ICU irq pins, we don't
> have to have shared irq support at all.
I tried some multi-function cards. However, my cobalt was not able to
booted. Firmware hangs up. When it is a card that uses a different pin
(A-D), it thinks like this. The multi function card of different irq
might be not able to be used with cobalt.
Thanks,
--
kiyohara
Index: arch/cobalt/cobalt/machdep.c
===================================================================
RCS file: /cvsroot/src/sys/arch/cobalt/cobalt/machdep.c,v
retrieving revision 1.75
diff -u -r1.75 machdep.c
--- arch/cobalt/cobalt/machdep.c 16 Sep 2006 13:31:44 -0000 1.75
+++ arch/cobalt/cobalt/machdep.c 8 Oct 2006 17:05:16 -0000
<at> <at> -66,6 +66,7 <at> <at>
#include <sys/reboot.h>
#include <sys/user.h>
#include <sys/mount.h>
+#include <sys/malloc.h>
#include <sys/kcore.h>
#include <sys/boot_flag.h>
#include <sys/ksyms.h>
<at> <at> -513,8 +514,10 <at> <at>
struct cobalt_intrhand *ih;
ih = &icu_intrtab[irq];
- if (ih->ih_func != NULL)
- panic("icu_intr_establish(): irq %d is already in use", irq);
+ if (ih->ih_func != NULL) {
+ ih = malloc(sizeof(*ih), M_DEVBUF, M_NOWAIT);
+ LIST_INSERT_AFTER(&icu_intrtab[irq], ih, ih_q);
+ }
ih->ih_cookie_type = COBALT_COOKIE_TYPE_ICU;
ih->ih_func = func;
<at> <at> -604,12 +607,14 <at> <at>
irq = OCW3_POLL_IRQ(ICU2_READ(PIC_OCW3)) + 8;
}
- ih = &icu_intrtab[irq];
- if (__predict_false(ih->ih_func == NULL)) {
- printf("icu_intr(): spurious interrupt (irq = %d)\n", irq);
- } else if (__predict_true((*ih->ih_func)(ih->ih_arg))) {
- ih->ih_evcnt.ev_count++;
- handled = 1;
+ for (ih = &icu_intrtab[irq]; ih != NULL; ih = LIST_NEXT(ih, ih_q)) {
+ if (__predict_false(ih->ih_func == NULL))
+ printf("icu_intr(): spurious interrupt (irq = %d)\n",
+ irq);
+ else if (__predict_true((*ih->ih_func)(ih->ih_arg))) {
+ ih->ih_evcnt.ev_count++;
+ handled = 1;
+ }
}
/* issue EOI to ack */
Index: arch/cobalt/pci/pci_machdep.c
===================================================================
RCS file: /cvsroot/src/sys/arch/cobalt/pci/pci_machdep.c,v
retrieving revision 1.24
diff -u -r1.24 pci_machdep.c
--- arch/cobalt/pci/pci_machdep.c 22 Aug 2006 21:42:19 -0000 1.24
+++ arch/cobalt/pci/pci_machdep.c 8 Oct 2006 17:05:16 -0000
<at> <at> -160,6 +160,8 <at> <at>
*ihp = 16 + 1;
else if (bus == 0 && dev == 12 && pin == PCI_INTERRUPT_PIN_A)
*ihp = 16 + 2;
+ else if (bus == 0 && dev == 10 && line == 0)
+ *ihp = 9;
else
*ihp = line;
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