1 /* $OpenBSD: xics.c,v 1.4 2022/04/06 18:59:27 naddy Exp $ */
2 /*
3 * Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/param.h>
19 #include <sys/systm.h>
20 #include <sys/device.h>
21 #include <sys/evcount.h>
22 #include <sys/malloc.h>
23 #include <sys/queue.h>
24
25 #include <machine/bus.h>
26 #include <machine/fdt.h>
27 #include <machine/opal.h>
28
29 #include <dev/ofw/openfirm.h>
30 #include <dev/ofw/fdt.h>
31
32 struct xics_softc {
33 struct device sc_dev;
34
35 struct interrupt_controller sc_ic;
36 };
37
38 int xics_match(struct device *, void *, void *);
39 void xics_attach(struct device *, struct device *, void *);
40
41 const struct cfattach xics_ca = {
42 sizeof (struct xics_softc), xics_match, xics_attach
43 };
44
45 struct cfdriver xics_cd = {
46 NULL, "xics", DV_DULL
47 };
48
49 void *xics_intr_establish(void *, int *, int,
50 struct cpu_info *, int (*)(void *), void *, char *);
51 void xics_intr_send_ipi(void *);
52
53 int
xics_match(struct device * parent,void * match,void * aux)54 xics_match(struct device *parent, void *match, void *aux)
55 {
56 struct fdt_attach_args *faa = aux;
57
58 return OF_is_compatible(faa->fa_node, "ibm,opal-xive-vc");
59 }
60
61 void
xics_attach(struct device * parent,struct device * self,void * aux)62 xics_attach(struct device *parent, struct device *self, void *aux)
63 {
64 struct xics_softc *sc = (struct xics_softc *)self;
65 struct fdt_attach_args *faa = aux;
66
67 printf("\n");
68
69 sc->sc_ic.ic_node = faa->fa_node;
70 sc->sc_ic.ic_cookie = self;
71 sc->sc_ic.ic_establish = xics_intr_establish;
72 sc->sc_ic.ic_send_ipi = xics_intr_send_ipi;
73 interrupt_controller_register(&sc->sc_ic);
74 }
75
76 void *
xics_intr_establish(void * cookie,int * cell,int level,struct cpu_info * ci,int (* func)(void *),void * arg,char * name)77 xics_intr_establish(void *cookie, int *cell, int level,
78 struct cpu_info *ci, int (*func)(void *), void *arg, char *name)
79 {
80 uint32_t girq = cell[0];
81 int type = cell[1];
82
83 return _intr_establish(girq, type, level, ci, func, arg, name);
84 }
85
86 void
xics_intr_send_ipi(void * cookie)87 xics_intr_send_ipi(void *cookie)
88 {
89 return _intr_send_ipi(cookie);
90 }
91