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