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/8.4/sys/amd64/amd64/legacy.c 234151 2012-04-11 20:55:21Z jhb $");
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 int lg_pcislot;
57 int lg_pcifunc;
58 };
59
60 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
61
62 static int legacy_probe(device_t);
63 static int legacy_attach(device_t);
64 static int legacy_print_child(device_t, device_t);
65 static device_t legacy_add_child(device_t bus, u_int order, const char *name,
66 int unit);
67 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
68 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
69
70 static device_method_t legacy_methods[] = {
71 /* Device interface */
72 DEVMETHOD(device_probe, legacy_probe),
73 DEVMETHOD(device_attach, legacy_attach),
74 DEVMETHOD(device_detach, bus_generic_detach),
75 DEVMETHOD(device_shutdown, bus_generic_shutdown),
76 DEVMETHOD(device_suspend, bus_generic_suspend),
77 DEVMETHOD(device_resume, bus_generic_resume),
78
79 /* Bus interface */
80 DEVMETHOD(bus_print_child, legacy_print_child),
81 DEVMETHOD(bus_add_child, legacy_add_child),
82 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
83 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
84 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
85 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
86 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
87 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
88 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
89 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
90 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
91
92 { 0, 0 }
93 };
94
95 static driver_t legacy_driver = {
96 "legacy",
97 legacy_methods,
98 1, /* no softc */
99 };
100 static devclass_t legacy_devclass;
101
102 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
103
104 static int
105 legacy_probe(device_t dev)
106 {
107
108 device_set_desc(dev, "legacy system");
109 device_quiet(dev);
110 return (0);
111 }
112
113 static int
114 legacy_attach(device_t dev)
115 {
116 device_t child;
117
118 /*
119 * Let our child drivers identify any child devices that they
120 * can find. Once that is done attach any devices that we
121 * found.
122 */
123 bus_generic_probe(dev);
124 bus_generic_attach(dev);
125
126 /*
127 * If we didn't see ISA on a pci bridge, create some
128 * connection points now so it shows up "on motherboard".
129 */
130 if (!devclass_get_device(devclass_find("isa"), 0)) {
131 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
132 if (child == NULL)
133 panic("legacy_attach isa");
134 device_probe_and_attach(child);
135 }
136
137 return 0;
138 }
139
140 static int
141 legacy_print_child(device_t bus, device_t child)
142 {
143 struct legacy_device *atdev = DEVTOAT(child);
144 int retval = 0;
145
146 retval += bus_print_child_header(bus, child);
147 if (atdev->lg_pcibus != -1)
148 retval += printf(" pcibus %d", atdev->lg_pcibus);
149 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
150
151 return (retval);
152 }
153
154 static device_t
155 legacy_add_child(device_t bus, u_int order, const char *name, int unit)
156 {
157 device_t child;
158 struct legacy_device *atdev;
159
160 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
161 M_NOWAIT | M_ZERO);
162 if (atdev == NULL)
163 return(NULL);
164 atdev->lg_pcibus = -1;
165 atdev->lg_pcislot = -1;
166 atdev->lg_pcifunc = -1;
167
168 child = device_add_child_ordered(bus, order, name, unit);
169 if (child == NULL)
170 free(atdev, M_LEGACYDEV);
171 else
172 /* should we free this in legacy_child_detached? */
173 device_set_ivars(child, atdev);
174
175 return (child);
176 }
177
178 static int
179 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
180 {
181 struct legacy_device *atdev = DEVTOAT(child);
182
183 switch (which) {
184 case LEGACY_IVAR_PCIDOMAIN:
185 *result = 0;
186 break;
187 case LEGACY_IVAR_PCIBUS:
188 *result = atdev->lg_pcibus;
189 break;
190 case LEGACY_IVAR_PCISLOT:
191 *result = atdev->lg_pcislot;
192 break;
193 case LEGACY_IVAR_PCIFUNC:
194 *result = atdev->lg_pcifunc;
195 break;
196 default:
197 return ENOENT;
198 }
199 return 0;
200 }
201
202
203 static int
204 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
205 {
206 struct legacy_device *atdev = DEVTOAT(child);
207
208 switch (which) {
209 case LEGACY_IVAR_PCIDOMAIN:
210 return EINVAL;
211 case LEGACY_IVAR_PCIBUS:
212 atdev->lg_pcibus = value;
213 break;
214 case LEGACY_IVAR_PCISLOT:
215 atdev->lg_pcislot = value;
216 break;
217 case LEGACY_IVAR_PCIFUNC:
218 atdev->lg_pcifunc = value;
219 break;
220 default:
221 return ENOENT;
222 }
223 return 0;
224 }
225
226 /*
227 * Legacy CPU attachment when ACPI is not available. Drivers like
228 * cpufreq(4) hang off this.
229 */
230 static void cpu_identify(driver_t *driver, device_t parent);
231 static int cpu_read_ivar(device_t dev, device_t child, int index,
232 uintptr_t *result);
233 static device_t cpu_add_child(device_t bus, u_int order, const char *name,
234 int unit);
235 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
236
237 struct cpu_device {
238 struct resource_list cd_rl;
239 struct pcpu *cd_pcpu;
240 };
241
242 static device_method_t cpu_methods[] = {
243 /* Device interface */
244 DEVMETHOD(device_identify, cpu_identify),
245 DEVMETHOD(device_probe, bus_generic_probe),
246 DEVMETHOD(device_attach, bus_generic_attach),
247 DEVMETHOD(device_detach, bus_generic_detach),
248 DEVMETHOD(device_shutdown, bus_generic_shutdown),
249 DEVMETHOD(device_suspend, bus_generic_suspend),
250 DEVMETHOD(device_resume, bus_generic_resume),
251
252 /* Bus interface */
253 DEVMETHOD(bus_add_child, cpu_add_child),
254 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
255 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
256 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
257 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
258 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
259 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
260 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
261 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
262 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
263 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
264
265 DEVMETHOD_END
266 };
267
268 static driver_t cpu_driver = {
269 "cpu",
270 cpu_methods,
271 1, /* no softc */
272 };
273 static devclass_t cpu_devclass;
274 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
275
276 static void
277 cpu_identify(driver_t *driver, device_t parent)
278 {
279 device_t child;
280 int i;
281
282 /*
283 * Attach a cpuX device for each CPU. We use an order of 150
284 * so that these devices are attached after the Host-PCI
285 * bridges (which are added at order 100).
286 */
287 CPU_FOREACH(i) {
288 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
289 if (child == NULL)
290 panic("legacy_attach cpu");
291 }
292 }
293
294 static device_t
295 cpu_add_child(device_t bus, u_int order, const char *name, int unit)
296 {
297 struct cpu_device *cd;
298 device_t child;
299 struct pcpu *pc;
300
301 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
302 return (NULL);
303
304 resource_list_init(&cd->cd_rl);
305 pc = pcpu_find(device_get_unit(bus));
306 cd->cd_pcpu = pc;
307
308 child = device_add_child_ordered(bus, order, name, unit);
309 if (child != NULL) {
310 pc->pc_device = child;
311 device_set_ivars(child, cd);
312 } else
313 free(cd, M_DEVBUF);
314 return (child);
315 }
316
317 static struct resource_list *
318 cpu_get_rlist(device_t dev, device_t child)
319 {
320 struct cpu_device *cpdev;
321
322 cpdev = device_get_ivars(child);
323 return (&cpdev->cd_rl);
324 }
325
326 static int
327 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
328 {
329 struct cpu_device *cpdev;
330
331 if (index != CPU_IVAR_PCPU)
332 return (ENOENT);
333 cpdev = device_get_ivars(child);
334 *result = (uintptr_t)cpdev->cd_pcpu;
335 return (0);
336 }
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