1 /*-
2 * Copyright (c) 2015 Andrew Turner
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/bus.h>
34 #include <sys/pcpu.h>
35 #include <sys/smp.h>
36
37 #include <vm/vm.h>
38 #include <vm/pmap.h>
39
40 #include <machine/intr.h>
41 #include <machine/smp.h>
42
43 #include <dev/ofw/openfirm.h>
44 #include <dev/ofw/ofw_cpu.h>
45 #include <dev/psci/psci.h>
46
47 static int running_cpus;
48
49 int
platform_mp_probe(void)50 platform_mp_probe(void)
51 {
52
53 return (mp_ncpus > 1);
54 }
55
56 static boolean_t
virt_maxid(u_int id,phandle_t node,u_int addr_cells,pcell_t * reg)57 virt_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
58 {
59
60 if (mp_maxid < id)
61 mp_maxid = id;
62
63 return (true);
64 }
65
66 void
platform_mp_setmaxid(void)67 platform_mp_setmaxid(void)
68 {
69
70 mp_maxid = PCPU_GET(cpuid);
71 mp_ncpus = ofw_cpu_early_foreach(virt_maxid, true);
72 if (mp_ncpus < 1)
73 mp_ncpus = 1;
74 mp_ncpus = MIN(mp_ncpus, MAXCPU);
75 }
76
77 static boolean_t
virt_start_ap(u_int id,phandle_t node,u_int addr_cells,pcell_t * reg)78 virt_start_ap(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
79 {
80 int err;
81
82 if (running_cpus >= mp_ncpus)
83 return (false);
84 running_cpus++;
85
86 err = psci_cpu_on(*reg, pmap_kextract((vm_offset_t)mpentry), id);
87
88 if (err != PSCI_RETVAL_SUCCESS)
89 return (false);
90
91 return (true);
92 }
93
94 void
platform_mp_start_ap(void)95 platform_mp_start_ap(void)
96 {
97
98 ofw_cpu_early_foreach(virt_start_ap, true);
99 }
100
101 void
platform_mp_init_secondary(void)102 platform_mp_init_secondary(void)
103 {
104
105 intr_pic_init_secondary();
106 }
107
108 void
platform_ipi_send(cpuset_t cpus,u_int ipi)109 platform_ipi_send(cpuset_t cpus, u_int ipi)
110 {
111
112 pic_ipi_send(cpus, ipi);
113 }
114