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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  * $FreeBSD$
26  */
27
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/module.h>
32 #include <sys/malloc.h>
33 #include <sys/bus.h>
34 #include <sys/cpu.h>
35 #include <machine/bus.h>
36
37 #include <dev/ofw/openfirm.h>
38 #include <dev/ofw/ofw_bus.h>
39 #include <dev/ofw/ofw_bus_subr.h>
40
41 static int      ofw_cpulist_probe(device_t);
42 static int      ofw_cpulist_attach(device_t);
43 static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev,
44     device_t child);
45
46 static MALLOC_DEFINE(M_OFWCPU, "ofwcpu", "OFW CPU device information");
47
48 static device_method_t ofw_cpulist_methods[] = {
49         /* Device interface */
50         DEVMETHOD(device_probe,         ofw_cpulist_probe),
51         DEVMETHOD(device_attach,        ofw_cpulist_attach),
52
53         /* Bus interface */
54         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
55         DEVMETHOD(bus_add_child,        bus_generic_add_child),
56         DEVMETHOD(bus_print_child,      bus_generic_print_child),
57         DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
58
59         /* ofw_bus interface */
60         DEVMETHOD(ofw_bus_get_devinfo,  ofw_cpulist_get_devinfo),
61         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
62         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
63         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
64         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
65         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
66
67         { 0, 0 }
68 };
69
70 static driver_t ofw_cpulist_driver = {
71         "cpulist",
72         ofw_cpulist_methods,
73         0
74 };
75
76 static devclass_t ofw_cpulist_devclass;
77
78 DRIVER_MODULE(ofw_cpulist, nexus, ofw_cpulist_driver, ofw_cpulist_devclass,
79     0, 0);
80
81 static int 
82 ofw_cpulist_probe(device_t dev) 
83 {
84         const char      *name;
85
86         name = ofw_bus_get_name(dev);
87
88         if (name == NULL || strcmp(name, "cpus") != 0)
89                 return (ENXIO);
90
91         device_set_desc(dev, "Open Firmware CPU Group");
92
93         return (0);
94 }
95
96 static int 
97 ofw_cpulist_attach(device_t dev) 
98 {
99         phandle_t root, child;
100         device_t cdev;
101         struct ofw_bus_devinfo *dinfo;
102
103         root = ofw_bus_get_node(dev);
104
105         for (child = OF_child(root); child != 0; child = OF_peer(child)) {
106                 dinfo = malloc(sizeof(*dinfo), M_OFWCPU, M_WAITOK | M_ZERO);
107
108                 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
109                         free(dinfo, M_OFWCPU);
110                         continue;
111                 }
112                 cdev = device_add_child(dev, NULL, -1);
113                 if (cdev == NULL) {
114                         device_printf(dev, "<%s>: device_add_child failed\n",
115                             dinfo->obd_name);
116                         ofw_bus_gen_destroy_devinfo(dinfo);
117                         free(dinfo, M_OFWCPU);
118                         continue;
119                 }
120                 device_set_ivars(cdev, dinfo);
121         }
122
123         return (bus_generic_attach(dev));
124 }
125
126 static const struct ofw_bus_devinfo *
127 ofw_cpulist_get_devinfo(device_t dev, device_t child) 
128 {
129         return (device_get_ivars(child));       
130 }
131
132 static int      ofw_cpu_probe(device_t);
133 static int      ofw_cpu_attach(device_t);
134 static int      ofw_cpu_read_ivar(device_t dev, device_t child, int index,
135     uintptr_t *result);
136
137 static device_method_t ofw_cpu_methods[] = {
138         /* Device interface */
139         DEVMETHOD(device_probe,         ofw_cpu_probe),
140         DEVMETHOD(device_attach,        ofw_cpu_attach),
141
142         /* Bus interface */
143         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
144         DEVMETHOD(bus_add_child,        bus_generic_add_child),
145         DEVMETHOD(bus_print_child,      bus_generic_print_child),
146         DEVMETHOD(bus_read_ivar,        ofw_cpu_read_ivar),
147         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
148         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
149         DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
150         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
151         DEVMETHOD(bus_activate_resource,bus_generic_activate_resource),
152
153         { 0, 0 }
154 };
155
156 static driver_t ofw_cpu_driver = {
157         "cpu",
158         ofw_cpu_methods,
159         0
160 };
161
162 static devclass_t ofw_cpu_devclass;
163
164 DRIVER_MODULE(ofw_cpu, cpulist, ofw_cpu_driver, ofw_cpu_devclass, 0, 0);
165
166 static int
167 ofw_cpu_probe(device_t dev)
168 {
169         const char *type = ofw_bus_get_type(dev);
170
171         if (strcmp(type, "cpu") != 0)
172                 return (ENXIO);
173
174         device_set_desc(dev, "Open Firmware CPU");
175         return (0);
176 }
177
178 static int
179 ofw_cpu_attach(device_t dev)
180 {
181         bus_generic_probe(dev);
182         return (bus_generic_attach(dev));
183 }
184
185 static int
186 ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
187 {
188         uint32_t cell;
189
190         switch (index) {
191         case CPU_IVAR_PCPU:
192                 OF_getprop(ofw_bus_get_node(dev), "reg", &cell, sizeof(cell));
193                 *result = (uintptr_t)(pcpu_find(cell));
194                 return (0);
195         case CPU_IVAR_NOMINAL_MHZ:
196                 cell = 0;
197                 OF_getprop(ofw_bus_get_node(dev), "clock-frequency",
198                     &cell, sizeof(cell));
199                 cell /= 1000000; /* convert to MHz */
200                 *result = (uintptr_t)(cell);
201                 return (0);
202         }
203
204         return (ENOENT);
205 }
206