1 /*-
2 * Copyright 1998 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/8.3/sys/amd64/amd64/legacy.c 230714 2012-01-29 01:22:48Z marius $");
32
33 /*
34 * This code implements a system driver for legacy systems that do not
35 * support ACPI or when ACPI support is not present in the kernel.
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/bus.h>
41 #include <sys/cpu.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #include <sys/module.h>
45 #include <machine/bus.h>
46 #include <sys/pcpu.h>
47 #include <sys/rman.h>
48 #include <sys/smp.h>
49
50 #include <machine/legacyvar.h>
51 #include <machine/resource.h>
52
53 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
54 struct legacy_device {
55 int lg_pcibus;
56 };
57
58 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
59
60 static int legacy_probe(device_t);
61 static int legacy_attach(device_t);
62 static int legacy_print_child(device_t, device_t);
63 static device_t legacy_add_child(device_t bus, u_int order, const char *name,
64 int unit);
65 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
66 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
67
68 static device_method_t legacy_methods[] = {
69 /* Device interface */
70 DEVMETHOD(device_probe, legacy_probe),
71 DEVMETHOD(device_attach, legacy_attach),
72 DEVMETHOD(device_detach, bus_generic_detach),
73 DEVMETHOD(device_shutdown, bus_generic_shutdown),
74 DEVMETHOD(device_suspend, bus_generic_suspend),
75 DEVMETHOD(device_resume, bus_generic_resume),
76
77 /* Bus interface */
78 DEVMETHOD(bus_print_child, legacy_print_child),
79 DEVMETHOD(bus_add_child, legacy_add_child),
80 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
81 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
82 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
83 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
84 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
85 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
86 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
87 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
88 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
89
90 { 0, 0 }
91 };
92
93 static driver_t legacy_driver = {
94 "legacy",
95 legacy_methods,
96 1, /* no softc */
97 };
98 static devclass_t legacy_devclass;
99
100 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
101
102 static int
103 legacy_probe(device_t dev)
104 {
105
106 device_set_desc(dev, "legacy system");
107 device_quiet(dev);
108 return (0);
109 }
110
111 static int
112 legacy_attach(device_t dev)
113 {
114 device_t child;
115
116 /*
117 * Let our child drivers identify any child devices that they
118 * can find. Once that is done attach any devices that we
119 * found.
120 */
121 bus_generic_probe(dev);
122 bus_generic_attach(dev);
123
124 /*
125 * If we didn't see ISA on a pci bridge, create some
126 * connection points now so it shows up "on motherboard".
127 */
128 if (!devclass_get_device(devclass_find("isa"), 0)) {
129 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
130 if (child == NULL)
131 panic("legacy_attach isa");
132 device_probe_and_attach(child);
133 }
134
135 return 0;
136 }
137
138 static int
139 legacy_print_child(device_t bus, device_t child)
140 {
141 struct legacy_device *atdev = DEVTOAT(child);
142 int retval = 0;
143
144 retval += bus_print_child_header(bus, child);
145 if (atdev->lg_pcibus != -1)
146 retval += printf(" pcibus %d", atdev->lg_pcibus);
147 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
148
149 return (retval);
150 }
151
152 static device_t
153 legacy_add_child(device_t bus, u_int order, const char *name, int unit)
154 {
155 device_t child;
156 struct legacy_device *atdev;
157
158 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
159 M_NOWAIT | M_ZERO);
160 if (atdev == NULL)
161 return(NULL);
162 atdev->lg_pcibus = -1;
163
164 child = device_add_child_ordered(bus, order, name, unit);
165 if (child == NULL)
166 free(atdev, M_LEGACYDEV);
167 else
168 /* should we free this in legacy_child_detached? */
169 device_set_ivars(child, atdev);
170
171 return (child);
172 }
173
174 static int
175 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
176 {
177 struct legacy_device *atdev = DEVTOAT(child);
178
179 switch (which) {
180 case LEGACY_IVAR_PCIDOMAIN:
181 *result = 0;
182 break;
183 case LEGACY_IVAR_PCIBUS:
184 *result = atdev->lg_pcibus;
185 break;
186 default:
187 return ENOENT;
188 }
189 return 0;
190 }
191
192
193 static int
194 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
195 {
196 struct legacy_device *atdev = DEVTOAT(child);
197
198 switch (which) {
199 case LEGACY_IVAR_PCIDOMAIN:
200 return EINVAL;
201 case LEGACY_IVAR_PCIBUS:
202 atdev->lg_pcibus = value;
203 break;
204 default:
205 return ENOENT;
206 }
207 return 0;
208 }
209
210 /*
211 * Legacy CPU attachment when ACPI is not available. Drivers like
212 * cpufreq(4) hang off this.
213 */
214 static void cpu_identify(driver_t *driver, device_t parent);
215 static int cpu_read_ivar(device_t dev, device_t child, int index,
216 uintptr_t *result);
217 static device_t cpu_add_child(device_t bus, u_int order, const char *name,
218 int unit);
219 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
220
221 struct cpu_device {
222 struct resource_list cd_rl;
223 struct pcpu *cd_pcpu;
224 };
225
226 static device_method_t cpu_methods[] = {
227 /* Device interface */
228 DEVMETHOD(device_identify, cpu_identify),
229 DEVMETHOD(device_probe, bus_generic_probe),
230 DEVMETHOD(device_attach, bus_generic_attach),
231 DEVMETHOD(device_detach, bus_generic_detach),
232 DEVMETHOD(device_shutdown, bus_generic_shutdown),
233 DEVMETHOD(device_suspend, bus_generic_suspend),
234 DEVMETHOD(device_resume, bus_generic_resume),
235
236 /* Bus interface */
237 DEVMETHOD(bus_add_child, cpu_add_child),
238 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
239 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
240 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
241 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
242 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
243 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
244 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
245 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
246 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
247 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
248
249 DEVMETHOD_END
250 };
251
252 static driver_t cpu_driver = {
253 "cpu",
254 cpu_methods,
255 1, /* no softc */
256 };
257 static devclass_t cpu_devclass;
258 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
259
260 static void
261 cpu_identify(driver_t *driver, device_t parent)
262 {
263 device_t child;
264 int i;
265
266 /*
267 * Attach a cpuX device for each CPU. We use an order of 150
268 * so that these devices are attached after the Host-PCI
269 * bridges (which are added at order 100).
270 */
271 CPU_FOREACH(i) {
272 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
273 if (child == NULL)
274 panic("legacy_attach cpu");
275 }
276 }
277
278 static device_t
279 cpu_add_child(device_t bus, u_int order, const char *name, int unit)
280 {
281 struct cpu_device *cd;
282 device_t child;
283 struct pcpu *pc;
284
285 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
286 return (NULL);
287
288 resource_list_init(&cd->cd_rl);
289 pc = pcpu_find(device_get_unit(bus));
290 cd->cd_pcpu = pc;
291
292 child = device_add_child_ordered(bus, order, name, unit);
293 if (child != NULL) {
294 pc->pc_device = child;
295 device_set_ivars(child, cd);
296 } else
297 free(cd, M_DEVBUF);
298 return (child);
299 }
300
301 static struct resource_list *
302 cpu_get_rlist(device_t dev, device_t child)
303 {
304 struct cpu_device *cpdev;
305
306 cpdev = device_get_ivars(child);
307 return (&cpdev->cd_rl);
308 }
309
310 static int
311 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
312 {
313 struct cpu_device *cpdev;
314
315 if (index != CPU_IVAR_PCPU)
316 return (ENOENT);
317 cpdev = device_get_ivars(child);
318 *result = (uintptr_t)cpdev->cd_pcpu;
319 return (0);
320 }
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