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/8.1/sys/amd64/amd64/legacy.c 177157 2008-03-13 20:39:04Z 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 };
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, 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_release_resource, bus_generic_release_resource),
84 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
85 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
86 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
87 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
88
89 { 0, 0 }
90 };
91
92 static driver_t legacy_driver = {
93 "legacy",
94 legacy_methods,
95 1, /* no softc */
96 };
97 static devclass_t legacy_devclass;
98
99 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
100
101 static int
102 legacy_probe(device_t dev)
103 {
104
105 device_set_desc(dev, "legacy system");
106 device_quiet(dev);
107 return (0);
108 }
109
110 static int
111 legacy_attach(device_t dev)
112 {
113 device_t child;
114
115 /*
116 * Let our child drivers identify any child devices that they
117 * can find. Once that is done attach any devices that we
118 * found.
119 */
120 bus_generic_probe(dev);
121 bus_generic_attach(dev);
122
123 /*
124 * If we didn't see ISA on a pci bridge, create some
125 * connection points now so it shows up "on motherboard".
126 */
127 if (!devclass_get_device(devclass_find("isa"), 0)) {
128 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
129 if (child == NULL)
130 panic("legacy_attach isa");
131 device_probe_and_attach(child);
132 }
133
134 return 0;
135 }
136
137 static int
138 legacy_print_child(device_t bus, device_t child)
139 {
140 struct legacy_device *atdev = DEVTOAT(child);
141 int retval = 0;
142
143 retval += bus_print_child_header(bus, child);
144 if (atdev->lg_pcibus != -1)
145 retval += printf(" pcibus %d", atdev->lg_pcibus);
146 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
147
148 return (retval);
149 }
150
151 static device_t
152 legacy_add_child(device_t bus, int order, const char *name, int unit)
153 {
154 device_t child;
155 struct legacy_device *atdev;
156
157 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
158 M_NOWAIT | M_ZERO);
159 if (atdev == NULL)
160 return(NULL);
161 atdev->lg_pcibus = -1;
162
163 child = device_add_child_ordered(bus, order, name, unit);
164 if (child == NULL)
165 free(atdev, M_LEGACYDEV);
166 else
167 /* should we free this in legacy_child_detached? */
168 device_set_ivars(child, atdev);
169
170 return (child);
171 }
172
173 static int
174 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
175 {
176 struct legacy_device *atdev = DEVTOAT(child);
177
178 switch (which) {
179 case LEGACY_IVAR_PCIDOMAIN:
180 *result = 0;
181 break;
182 case LEGACY_IVAR_PCIBUS:
183 *result = atdev->lg_pcibus;
184 break;
185 default:
186 return ENOENT;
187 }
188 return 0;
189 }
190
191
192 static int
193 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
194 {
195 struct legacy_device *atdev = DEVTOAT(child);
196
197 switch (which) {
198 case LEGACY_IVAR_PCIDOMAIN:
199 return EINVAL;
200 case LEGACY_IVAR_PCIBUS:
201 atdev->lg_pcibus = value;
202 break;
203 default:
204 return ENOENT;
205 }
206 return 0;
207 }
208
209 /*
210 * Legacy CPU attachment when ACPI is not available. Drivers like
211 * cpufreq(4) hang off this.
212 */
213 static void cpu_identify(driver_t *driver, device_t parent);
214 static int cpu_read_ivar(device_t dev, device_t child, int index,
215 uintptr_t *result);
216 static device_t cpu_add_child(device_t bus, int order, const char *name,
217 int unit);
218 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
219
220 struct cpu_device {
221 struct resource_list cd_rl;
222 struct pcpu *cd_pcpu;
223 };
224
225 static device_method_t cpu_methods[] = {
226 /* Device interface */
227 DEVMETHOD(device_identify, cpu_identify),
228 DEVMETHOD(device_probe, bus_generic_probe),
229 DEVMETHOD(device_attach, bus_generic_attach),
230 DEVMETHOD(device_detach, bus_generic_detach),
231 DEVMETHOD(device_shutdown, bus_generic_shutdown),
232 DEVMETHOD(device_suspend, bus_generic_suspend),
233 DEVMETHOD(device_resume, bus_generic_resume),
234
235 /* Bus interface */
236 DEVMETHOD(bus_add_child, cpu_add_child),
237 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
238 DEVMETHOD(bus_print_child, bus_generic_print_child),
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_driver_added, bus_generic_driver_added),
245 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
246 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
247 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
248 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
249
250 { 0, 0 }
251 };
252
253 static driver_t cpu_driver = {
254 "cpu",
255 cpu_methods,
256 1, /* no softc */
257 };
258 static devclass_t cpu_devclass;
259 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
260
261 static void
262 cpu_identify(driver_t *driver, device_t parent)
263 {
264 device_t child;
265 int i;
266
267 /*
268 * Attach a cpuX device for each CPU. We use an order of 150
269 * so that these devices are attached after the Host-PCI
270 * bridges (which are added at order 100).
271 */
272 for (i = 0; i <= mp_maxid; i++)
273 if (!CPU_ABSENT(i)) {
274 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
275 if (child == NULL)
276 panic("legacy_attach cpu");
277 }
278 }
279
280 static device_t
281 cpu_add_child(device_t bus, int order, const char *name, int unit)
282 {
283 struct cpu_device *cd;
284 device_t child;
285 struct pcpu *pc;
286
287 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
288 return (NULL);
289
290 resource_list_init(&cd->cd_rl);
291 pc = pcpu_find(device_get_unit(bus));
292 cd->cd_pcpu = pc;
293
294 child = device_add_child_ordered(bus, order, name, unit);
295 if (child != NULL) {
296 pc->pc_device = child;
297 device_set_ivars(child, cd);
298 } else
299 free(cd, M_DEVBUF);
300 return (child);
301 }
302
303 static struct resource_list *
304 cpu_get_rlist(device_t dev, device_t child)
305 {
306 struct cpu_device *cpdev;
307
308 cpdev = device_get_ivars(child);
309 return (&cpdev->cd_rl);
310 }
311
312 static int
313 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
314 {
315 struct cpu_device *cpdev;
316
317 if (index != CPU_IVAR_PCPU)
318 return (ENOENT);
319 cpdev = device_get_ivars(child);
320 *result = (uintptr_t)cpdev->cd_pcpu;
321 return (0);
322 }
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