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/platformvar.h>
42#include <machine/smp.h>
43
44#include <dev/ofw/openfirm.h>
45#include <dev/ofw/ofw_cpu.h>
46#include <dev/psci/psci.h>
47
48#include <arm/qemu/virt_mp.h>
49
50static int running_cpus;
51
52static boolean_t
53virt_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
54{
55
56	if (mp_maxid < id)
57		mp_maxid = id;
58
59	return (true);
60}
61
62void
63virt_mp_setmaxid(platform_t plat)
64{
65
66	mp_maxid = PCPU_GET(cpuid);
67	mp_ncpus = ofw_cpu_early_foreach(virt_maxid, true);
68	if (mp_ncpus < 1)
69		mp_ncpus = 1;
70	mp_ncpus = MIN(mp_ncpus, MAXCPU);
71}
72
73static boolean_t
74virt_start_ap(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
75{
76	int err;
77
78	if (running_cpus >= mp_ncpus)
79		return (false);
80	running_cpus++;
81
82	err = psci_cpu_on(*reg, pmap_kextract((vm_offset_t)mpentry), id);
83
84	if (err != PSCI_RETVAL_SUCCESS)
85		return (false);
86
87	return (true);
88}
89
90void
91virt_mp_start_ap(platform_t plat)
92{
93
94	ofw_cpu_early_foreach(virt_start_ap, true);
95}
96