2 * Copyright 1998 Massachusetts Institute of Technology
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
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
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.
38 #include <sys/param.h>
39 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #include <sys/module.h>
45 #include <machine/bus.h>
52 #include <i386/bios/mca_machdep.h>
55 #include <machine/legacyvar.h>
56 #include <machine/resource.h>
58 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
59 struct legacy_device {
63 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
65 static void legacy_identify(driver_t *driver, device_t parent);
66 static int legacy_probe(device_t);
67 static int legacy_attach(device_t);
68 static int legacy_print_child(device_t, device_t);
69 static device_t legacy_add_child(device_t bus, int order, const char *name,
71 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
72 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
74 static device_method_t legacy_methods[] = {
75 /* Device interface */
76 DEVMETHOD(device_identify, legacy_identify),
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),
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_release_resource, bus_generic_release_resource),
91 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
92 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
93 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
94 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
99 static driver_t legacy_driver = {
104 static devclass_t legacy_devclass;
106 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
109 legacy_identify(driver_t *driver, device_t parent)
113 * Add child device with order of 11 so it gets probed
114 * after ACPI (which is at order 10).
116 if (BUS_ADD_CHILD(parent, 11, "legacy", 0) == NULL)
117 panic("legacy: could not attach");
121 legacy_probe(device_t dev)
126 * Fail to probe if ACPI is ok.
128 acpi = devclass_get_device(devclass_find("acpi"), 0);
129 if (acpi != NULL && device_is_alive(acpi))
131 device_set_desc(dev, "legacy system");
137 legacy_attach(device_t dev)
142 * Let our child drivers identify any child devices that they
143 * can find. Once that is done attach any devices that we
146 bus_generic_probe(dev);
147 bus_generic_attach(dev);
151 * If we didn't see EISA or ISA on a pci bridge, create some
152 * connection points now so they show up "on motherboard".
154 if (!devclass_get_device(devclass_find("eisa"), 0)) {
155 child = BUS_ADD_CHILD(dev, 0, "eisa", 0);
157 panic("legacy_attach eisa");
158 device_probe_and_attach(child);
162 if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) {
163 child = BUS_ADD_CHILD(dev, 0, "mca", 0);
165 panic("legacy_probe mca");
166 device_probe_and_attach(child);
169 if (!devclass_get_device(devclass_find("isa"), 0)) {
170 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
172 panic("legacy_attach isa");
173 device_probe_and_attach(child);
180 legacy_print_child(device_t bus, device_t child)
182 struct legacy_device *atdev = DEVTOAT(child);
185 retval += bus_print_child_header(bus, child);
186 if (atdev->lg_pcibus != -1)
187 retval += printf(" pcibus %d", atdev->lg_pcibus);
188 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
194 legacy_add_child(device_t bus, int order, const char *name, int unit)
197 struct legacy_device *atdev;
199 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
203 atdev->lg_pcibus = -1;
205 child = device_add_child_ordered(bus, order, name, unit);
207 free(atdev, M_LEGACYDEV);
209 /* should we free this in legacy_child_detached? */
210 device_set_ivars(child, atdev);
216 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
218 struct legacy_device *atdev = DEVTOAT(child);
221 case LEGACY_IVAR_PCIDOMAIN:
224 case LEGACY_IVAR_PCIBUS:
225 *result = atdev->lg_pcibus;
235 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
237 struct legacy_device *atdev = DEVTOAT(child);
240 case LEGACY_IVAR_PCIDOMAIN:
242 case LEGACY_IVAR_PCIBUS:
243 atdev->lg_pcibus = value;
252 * Legacy CPU attachment when ACPI is not available. Drivers like
253 * cpufreq(4) hang off this.
255 static void cpu_identify(driver_t *driver, device_t parent);
256 static int cpu_read_ivar(device_t dev, device_t child, int index,
258 static device_t cpu_add_child(device_t bus, int order, const char *name,
260 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
263 struct resource_list cd_rl;
264 struct pcpu *cd_pcpu;
267 static device_method_t cpu_methods[] = {
268 /* Device interface */
269 DEVMETHOD(device_identify, cpu_identify),
270 DEVMETHOD(device_probe, bus_generic_probe),
271 DEVMETHOD(device_attach, bus_generic_attach),
272 DEVMETHOD(device_detach, bus_generic_detach),
273 DEVMETHOD(device_shutdown, bus_generic_shutdown),
274 DEVMETHOD(device_suspend, bus_generic_suspend),
275 DEVMETHOD(device_resume, bus_generic_resume),
278 DEVMETHOD(bus_add_child, cpu_add_child),
279 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
280 DEVMETHOD(bus_print_child, bus_generic_print_child),
281 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
282 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
283 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
284 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
285 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
286 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
287 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
288 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
289 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
290 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
295 static driver_t cpu_driver = {
300 static devclass_t cpu_devclass;
301 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
304 cpu_identify(driver_t *driver, device_t parent)
310 * Attach a cpuX device for each CPU. We use an order of 150
311 * so that these devices are attached after the Host-PCI
312 * bridges (which are added at order 100).
314 for (i = 0; i <= mp_maxid; i++)
315 if (!CPU_ABSENT(i)) {
316 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
318 panic("legacy_attach cpu");
323 cpu_add_child(device_t bus, int order, const char *name, int unit)
325 struct cpu_device *cd;
329 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
332 resource_list_init(&cd->cd_rl);
333 pc = pcpu_find(device_get_unit(bus));
336 child = device_add_child_ordered(bus, order, name, unit);
338 pc->pc_device = child;
339 device_set_ivars(child, cd);
345 static struct resource_list *
346 cpu_get_rlist(device_t dev, device_t child)
348 struct cpu_device *cpdev;
350 cpdev = device_get_ivars(child);
351 return (&cpdev->cd_rl);
355 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
357 struct cpu_device *cpdev;
359 if (index != CPU_IVAR_PCPU)
361 cpdev = device_get_ivars(child);
362 *result = (uintptr_t)cpdev->cd_pcpu;