1 /* $NetBSD: ipi_hammerhead.c,v 1.7 2023/12/20 15:29:05 thorpej Exp $ */
2 /*-
3 * Copyright (c) 2007 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Tim Rightnour
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: ipi_hammerhead.c,v 1.7 2023/12/20 15:29:05 thorpej Exp $");
33
34 #include "opt_multiprocessor.h"
35 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/atomic.h>
38
39 #include <machine/pio.h>
40
41 #include <arch/powerpc/pic/picvar.h>
42 #include <arch/powerpc/pic/ipivar.h>
43
44 #ifdef MULTIPROCESSOR
45
46 extern struct ipi_ops ipiops;
47 static void hh_send_ipi(cpuid_t, uint32_t);
48 static void hh_establish_ipi(int, int, void *);
49
50 #define HH_INTR_SECONDARY 0xf80000c0
51 #define HH_INTR_PRIMARY 0xf3019000
52 #define GC_IPI_IRQ 30
53
54 void
setup_hammerhead_ipi(void)55 setup_hammerhead_ipi(void)
56 {
57 ipiops.ppc_send_ipi = hh_send_ipi;
58 ipiops.ppc_establish_ipi = hh_establish_ipi;
59 ipiops.ppc_ipi_vector = GC_IPI_IRQ;
60 }
61
62 static void
hh_send_ipi(cpuid_t target,uint32_t mesg)63 hh_send_ipi(cpuid_t target, uint32_t mesg)
64 {
65 int cpu_id = target;
66
67 if (target == IPI_DST_ALL) {
68 atomic_or_32(&cpu_info[0].ci_pending_ipis, mesg);
69 atomic_or_32(&cpu_info[1].ci_pending_ipis, mesg);
70 in32(HH_INTR_PRIMARY);
71 out32(HH_INTR_SECONDARY, ~0);
72 out32(HH_INTR_SECONDARY, 0);
73 return;
74 }
75
76 if (target == IPI_DST_NOTME) {
77 cpu_id = cpu_number() ^ 1;
78 }
79
80 atomic_or_32(&cpu_info[cpu_id].ci_pending_ipis, mesg);
81 switch (cpu_id) {
82 case 0:
83 in32(HH_INTR_PRIMARY);
84 break;
85 case 1:
86 out32(HH_INTR_SECONDARY, ~0);
87 out32(HH_INTR_SECONDARY, 0);
88 break;
89 }
90 }
91
92 static void
hh_establish_ipi(int type,int level,void * ih_args)93 hh_establish_ipi(int type, int level, void *ih_args)
94 {
95 intr_establish_xname(ipiops.ppc_ipi_vector, type, level, ipi_intr,
96 ih_args, "hh ipi");
97 }
98
99 #endif /*MULTIPROCESSOR*/
100