FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/legacy.c
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("$FreeBSD$");
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 "opt_mca.h"
51 #ifdef DEV_MCA
52 #include <i386/bios/mca_machdep.h>
53 #endif
54
55 #include <machine/legacyvar.h>
56 #include <machine/resource.h>
57
58 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
59 struct legacy_device {
60 int lg_pcibus;
61 int lg_pcislot;
62 int lg_pcifunc;
63 };
64
65 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
66
67 static int legacy_probe(device_t);
68 static int legacy_attach(device_t);
69 static int legacy_print_child(device_t, device_t);
70 static device_t legacy_add_child(device_t bus, u_int order, const char *name,
71 int unit);
72 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
73 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
74
75 static device_method_t legacy_methods[] = {
76 /* Device interface */
77 DEVMETHOD(device_probe, legacy_probe),
78 DEVMETHOD(device_attach, legacy_attach),
79 DEVMETHOD(device_detach, bus_generic_detach),
80 DEVMETHOD(device_shutdown, bus_generic_shutdown),
81 DEVMETHOD(device_suspend, bus_generic_suspend),
82 DEVMETHOD(device_resume, bus_generic_resume),
83
84 /* Bus interface */
85 DEVMETHOD(bus_print_child, legacy_print_child),
86 DEVMETHOD(bus_add_child, legacy_add_child),
87 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
88 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
89 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
90 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
91 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
92 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
93 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
94 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
95 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
96
97 { 0, 0 }
98 };
99
100 static driver_t legacy_driver = {
101 "legacy",
102 legacy_methods,
103 1, /* no softc */
104 };
105 static devclass_t legacy_devclass;
106
107 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
108
109 static int
110 legacy_probe(device_t dev)
111 {
112
113 device_set_desc(dev, "legacy system");
114 device_quiet(dev);
115 return (0);
116 }
117
118 static int
119 legacy_attach(device_t dev)
120 {
121 device_t child;
122
123 /*
124 * Let our child drivers identify any child devices that they
125 * can find. Once that is done attach any devices that we
126 * found.
127 */
128 bus_generic_probe(dev);
129 bus_generic_attach(dev);
130
131 #ifndef PC98
132 /*
133 * If we didn't see EISA or ISA on a pci bridge, create some
134 * connection points now so they show up "on motherboard".
135 */
136 if (!devclass_get_device(devclass_find("eisa"), 0)) {
137 child = BUS_ADD_CHILD(dev, 0, "eisa", 0);
138 if (child == NULL)
139 panic("legacy_attach eisa");
140 device_probe_and_attach(child);
141 }
142 #endif
143 #ifdef DEV_MCA
144 if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) {
145 child = BUS_ADD_CHILD(dev, 0, "mca", 0);
146 if (child == 0)
147 panic("legacy_probe mca");
148 device_probe_and_attach(child);
149 }
150 #endif
151 if (!devclass_get_device(devclass_find("isa"), 0)) {
152 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
153 if (child == NULL)
154 panic("legacy_attach isa");
155 device_probe_and_attach(child);
156 }
157
158 return 0;
159 }
160
161 static int
162 legacy_print_child(device_t bus, device_t child)
163 {
164 struct legacy_device *atdev = DEVTOAT(child);
165 int retval = 0;
166
167 retval += bus_print_child_header(bus, child);
168 if (atdev->lg_pcibus != -1)
169 retval += printf(" pcibus %d", atdev->lg_pcibus);
170 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
171
172 return (retval);
173 }
174
175 static device_t
176 legacy_add_child(device_t bus, u_int order, const char *name, int unit)
177 {
178 device_t child;
179 struct legacy_device *atdev;
180
181 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
182 M_NOWAIT | M_ZERO);
183 if (atdev == NULL)
184 return(NULL);
185 atdev->lg_pcibus = -1;
186 atdev->lg_pcislot = -1;
187 atdev->lg_pcifunc = -1;
188
189 child = device_add_child_ordered(bus, order, name, unit);
190 if (child == NULL)
191 free(atdev, M_LEGACYDEV);
192 else
193 /* should we free this in legacy_child_detached? */
194 device_set_ivars(child, atdev);
195
196 return (child);
197 }
198
199 static int
200 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
201 {
202 struct legacy_device *atdev = DEVTOAT(child);
203
204 switch (which) {
205 case LEGACY_IVAR_PCIDOMAIN:
206 *result = 0;
207 break;
208 case LEGACY_IVAR_PCIBUS:
209 *result = atdev->lg_pcibus;
210 break;
211 case LEGACY_IVAR_PCISLOT:
212 *result = atdev->lg_pcislot;
213 break;
214 case LEGACY_IVAR_PCIFUNC:
215 *result = atdev->lg_pcifunc;
216 break;
217 default:
218 return ENOENT;
219 }
220 return 0;
221 }
222
223
224 static int
225 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
226 {
227 struct legacy_device *atdev = DEVTOAT(child);
228
229 switch (which) {
230 case LEGACY_IVAR_PCIDOMAIN:
231 return EINVAL;
232 case LEGACY_IVAR_PCIBUS:
233 atdev->lg_pcibus = value;
234 break;
235 case LEGACY_IVAR_PCISLOT:
236 atdev->lg_pcislot = value;
237 break;
238 case LEGACY_IVAR_PCIFUNC:
239 atdev->lg_pcifunc = value;
240 break;
241 default:
242 return ENOENT;
243 }
244 return 0;
245 }
246
247 /*
248 * Legacy CPU attachment when ACPI is not available. Drivers like
249 * cpufreq(4) hang off this.
250 */
251 static void cpu_identify(driver_t *driver, device_t parent);
252 static int cpu_read_ivar(device_t dev, device_t child, int index,
253 uintptr_t *result);
254 static device_t cpu_add_child(device_t bus, u_int order, const char *name,
255 int unit);
256 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
257
258 struct cpu_device {
259 struct resource_list cd_rl;
260 struct pcpu *cd_pcpu;
261 };
262
263 static device_method_t cpu_methods[] = {
264 /* Device interface */
265 DEVMETHOD(device_identify, cpu_identify),
266 DEVMETHOD(device_probe, bus_generic_probe),
267 DEVMETHOD(device_attach, bus_generic_attach),
268 DEVMETHOD(device_detach, bus_generic_detach),
269 DEVMETHOD(device_shutdown, bus_generic_shutdown),
270 DEVMETHOD(device_suspend, bus_generic_suspend),
271 DEVMETHOD(device_resume, bus_generic_resume),
272
273 /* Bus interface */
274 DEVMETHOD(bus_add_child, cpu_add_child),
275 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
276 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
277 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
278 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
279 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
280 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
281 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
282 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
283 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
284 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
285
286 DEVMETHOD_END
287 };
288
289 static driver_t cpu_driver = {
290 "cpu",
291 cpu_methods,
292 1, /* no softc */
293 };
294 static devclass_t cpu_devclass;
295 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
296
297 static void
298 cpu_identify(driver_t *driver, device_t parent)
299 {
300 device_t child;
301 int i;
302
303 /*
304 * Attach a cpuX device for each CPU. We use an order of 150
305 * so that these devices are attached after the Host-PCI
306 * bridges (which are added at order 100).
307 */
308 CPU_FOREACH(i) {
309 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
310 if (child == NULL)
311 panic("legacy_attach cpu");
312 }
313 }
314
315 static device_t
316 cpu_add_child(device_t bus, u_int order, const char *name, int unit)
317 {
318 struct cpu_device *cd;
319 device_t child;
320 struct pcpu *pc;
321
322 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
323 return (NULL);
324
325 resource_list_init(&cd->cd_rl);
326 pc = pcpu_find(device_get_unit(bus));
327 cd->cd_pcpu = pc;
328
329 child = device_add_child_ordered(bus, order, name, unit);
330 if (child != NULL) {
331 pc->pc_device = child;
332 device_set_ivars(child, cd);
333 } else
334 free(cd, M_DEVBUF);
335 return (child);
336 }
337
338 static struct resource_list *
339 cpu_get_rlist(device_t dev, device_t child)
340 {
341 struct cpu_device *cpdev;
342
343 cpdev = device_get_ivars(child);
344 return (&cpdev->cd_rl);
345 }
346
347 static int
348 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
349 {
350 struct cpu_device *cpdev;
351
352 if (index != CPU_IVAR_PCPU)
353 return (ENOENT);
354 cpdev = device_get_ivars(child);
355 *result = (uintptr_t)cpdev->cd_pcpu;
356 return (0);
357 }
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