1/*-
2 * Copyright (c) 2013 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#include "opt_platform.h"
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/param.h>
33#include <sys/smp.h>
34
35#include <arm/include/platform.h>
36#include <arm/include/platformvar.h>
37
38#include <dev/ofw/openfirm.h>
39#include <dev/ofw/ofw_bus_subr.h>
40#include <dev/ofw/ofw_cpu.h>
41#include <dev/fdt/fdt_common.h>
42
43#include "platform_if.h"
44
45#define	FDT_PLATFORM(plat)	\
46    ((fdt_platform_def_t *)(plat)->cls->baseclasses[0])
47
48#if defined(SMP)
49static platform_mp_setmaxid_t fdt_platform_mp_setmaxid;
50#endif
51
52static int
53fdt_platform_probe(platform_t plat)
54{
55	const char *compat;
56	phandle_t root;
57
58	/*
59	 * TODO: Make these KASSERTs, we should only be here if we
60	 * are using the FDT platform magic.
61	 */
62	if (plat->cls == NULL || FDT_PLATFORM(plat) == NULL)
63		return 1;
64
65	/* Is the device is compatible? */
66	root = OF_finddevice("/");
67	compat = FDT_PLATFORM(plat)->fdt_compatible;
68	if (ofw_bus_node_is_compatible(root, compat) != 0)
69		return 0;
70
71	/* Not compatible, return an error */
72	return 1;
73}
74
75#if defined(SMP)
76static boolean_t
77fdt_platform_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
78{
79
80	if (mp_maxid < id)
81		mp_maxid = id;
82
83	return (true);
84}
85
86static void
87fdt_platform_mp_setmaxid(platform_t plat)
88{
89
90	mp_maxid = PCPU_GET(cpuid);
91	mp_ncpus = ofw_cpu_early_foreach(fdt_platform_maxid, true);
92	if (mp_ncpus < 1)
93		mp_ncpus = 1;
94	mp_ncpus = MIN(mp_ncpus, MAXCPU);
95}
96#endif
97
98platform_method_t fdt_platform_methods[] = {
99	PLATFORMMETHOD(platform_probe,	fdt_platform_probe),
100
101#if defined(SMP)
102	PLATFORMMETHOD(platform_mp_setmaxid, fdt_platform_mp_setmaxid),
103#endif
104
105	PLATFORMMETHOD_END
106};
107
108