xref: /freebsd/sys/arm/qemu/virt_mp.c (revision 2eb4d8dc723da3cf7d735a3226ae49da4c8c5dbc)
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 
50 static int running_cpus;
51 
52 static boolean_t
53 virt_start_ap(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
54 {
55 	int err;
56 
57 	if (running_cpus >= mp_ncpus)
58 		return (false);
59 	running_cpus++;
60 
61 	err = psci_cpu_on(*reg, pmap_kextract((vm_offset_t)mpentry), id);
62 
63 	if (err != PSCI_RETVAL_SUCCESS)
64 		return (false);
65 
66 	return (true);
67 }
68 
69 void
70 virt_mp_start_ap(platform_t plat)
71 {
72 
73 	ofw_cpu_early_foreach(virt_start_ap, true);
74 }
75