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[FreeBSD/releng/9.2.git] / sys / powerpc / ofw / ofw_cpu.c
1 /*-
2  * Copyright (C) 2009 Nathan Whitehorn
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 Benno Rice ``AS IS'' AND ANY EXPRESS OR
15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/kernel.h>
32 #include <sys/module.h>
33 #include <sys/malloc.h>
34 #include <sys/bus.h>
35 #include <sys/cpu.h>
36 #include <machine/bus.h>
37
38 #include <dev/ofw/openfirm.h>
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/ofw_bus_subr.h>
41
42 static int      ofw_cpulist_probe(device_t);
43 static int      ofw_cpulist_attach(device_t);
44 static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev,
45     device_t child);
46
47 static MALLOC_DEFINE(M_OFWCPU, "ofwcpu", "OFW CPU device information");
48
49 static device_method_t ofw_cpulist_methods[] = {
50         /* Device interface */
51         DEVMETHOD(device_probe,         ofw_cpulist_probe),
52         DEVMETHOD(device_attach,        ofw_cpulist_attach),
53
54         /* Bus interface */
55         DEVMETHOD(bus_add_child,        bus_generic_add_child),
56         DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
57
58         /* ofw_bus interface */
59         DEVMETHOD(ofw_bus_get_devinfo,  ofw_cpulist_get_devinfo),
60         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
61         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
62         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
63         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
64         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
65
66         DEVMETHOD_END
67 };
68
69 static driver_t ofw_cpulist_driver = {
70         "cpulist",
71         ofw_cpulist_methods,
72         0
73 };
74
75 static devclass_t ofw_cpulist_devclass;
76
77 DRIVER_MODULE(ofw_cpulist, nexus, ofw_cpulist_driver, ofw_cpulist_devclass,
78     0, 0);
79
80 static int 
81 ofw_cpulist_probe(device_t dev) 
82 {
83         const char      *name;
84
85         name = ofw_bus_get_name(dev);
86
87         if (name == NULL || strcmp(name, "cpus") != 0)
88                 return (ENXIO);
89
90         device_set_desc(dev, "Open Firmware CPU Group");
91
92         return (0);
93 }
94
95 static int 
96 ofw_cpulist_attach(device_t dev) 
97 {
98         phandle_t root, child;
99         device_t cdev;
100         struct ofw_bus_devinfo *dinfo;
101
102         root = ofw_bus_get_node(dev);
103
104         for (child = OF_child(root); child != 0; child = OF_peer(child)) {
105                 dinfo = malloc(sizeof(*dinfo), M_OFWCPU, M_WAITOK | M_ZERO);
106
107                 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
108                         free(dinfo, M_OFWCPU);
109                         continue;
110                 }
111                 cdev = device_add_child(dev, NULL, -1);
112                 if (cdev == NULL) {
113                         device_printf(dev, "<%s>: device_add_child failed\n",
114                             dinfo->obd_name);
115                         ofw_bus_gen_destroy_devinfo(dinfo);
116                         free(dinfo, M_OFWCPU);
117                         continue;
118                 }
119                 device_set_ivars(cdev, dinfo);
120         }
121
122         return (bus_generic_attach(dev));
123 }
124
125 static const struct ofw_bus_devinfo *
126 ofw_cpulist_get_devinfo(device_t dev, device_t child) 
127 {
128         return (device_get_ivars(child));       
129 }
130
131 static int      ofw_cpu_probe(device_t);
132 static int      ofw_cpu_attach(device_t);
133 static int      ofw_cpu_read_ivar(device_t dev, device_t child, int index,
134     uintptr_t *result);
135
136 static device_method_t ofw_cpu_methods[] = {
137         /* Device interface */
138         DEVMETHOD(device_probe,         ofw_cpu_probe),
139         DEVMETHOD(device_attach,        ofw_cpu_attach),
140
141         /* Bus interface */
142         DEVMETHOD(bus_add_child,        bus_generic_add_child),
143         DEVMETHOD(bus_read_ivar,        ofw_cpu_read_ivar),
144         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
145         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
146         DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
147         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
148         DEVMETHOD(bus_activate_resource,bus_generic_activate_resource),
149
150         DEVMETHOD_END
151 };
152
153 static driver_t ofw_cpu_driver = {
154         "cpu",
155         ofw_cpu_methods,
156         0
157 };
158
159 static devclass_t ofw_cpu_devclass;
160
161 DRIVER_MODULE(ofw_cpu, cpulist, ofw_cpu_driver, ofw_cpu_devclass, 0, 0);
162
163 static int
164 ofw_cpu_probe(device_t dev)
165 {
166         const char *type = ofw_bus_get_type(dev);
167
168         if (strcmp(type, "cpu") != 0)
169                 return (ENXIO);
170
171         device_set_desc(dev, "Open Firmware CPU");
172         return (0);
173 }
174
175 static int
176 ofw_cpu_attach(device_t dev)
177 {
178         bus_generic_probe(dev);
179         return (bus_generic_attach(dev));
180 }
181
182 static int
183 ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
184 {
185         uint32_t cell;
186
187         switch (index) {
188         case CPU_IVAR_PCPU:
189                 OF_getprop(ofw_bus_get_node(dev), "reg", &cell, sizeof(cell));
190                 *result = (uintptr_t)(pcpu_find(cell));
191                 return (0);
192         case CPU_IVAR_NOMINAL_MHZ:
193                 cell = 0;
194                 OF_getprop(ofw_bus_get_node(dev), "clock-frequency",
195                     &cell, sizeof(cell));
196                 cell /= 1000000; /* convert to MHz */
197                 *result = (uintptr_t)(cell);
198                 return (0);
199         }
200
201         return (ENOENT);
202 }
203