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
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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
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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>
50 #include <machine/legacyvar.h>
51 #include <machine/resource.h>
53 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
54 struct legacy_device {
58 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
60 static void legacy_identify(driver_t *driver, device_t parent);
61 static int legacy_probe(device_t);
62 static int legacy_attach(device_t);
63 static int legacy_print_child(device_t, device_t);
64 static device_t legacy_add_child(device_t bus, int order, const char *name,
66 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
67 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
69 static device_method_t legacy_methods[] = {
70 /* Device interface */
71 DEVMETHOD(device_identify, legacy_identify),
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),
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_release_resource, bus_generic_release_resource),
86 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
87 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
88 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
89 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
94 static driver_t legacy_driver = {
99 static devclass_t legacy_devclass;
101 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
104 legacy_identify(driver_t *driver, device_t parent)
108 * Add child device with order of 11 so it gets probed
109 * after ACPI (which is at order 10).
111 if (BUS_ADD_CHILD(parent, 11, "legacy", 0) == NULL)
112 panic("legacy: could not attach");
116 legacy_probe(device_t dev)
121 * Fail to probe if ACPI is ok.
123 acpi = devclass_get_device(devclass_find("acpi"), 0);
124 if (acpi != NULL && device_is_alive(acpi))
126 device_set_desc(dev, "legacy system");
132 legacy_attach(device_t dev)
137 * Let our child drivers identify any child devices that they
138 * can find. Once that is done attach any devices that we
141 bus_generic_probe(dev);
142 bus_generic_attach(dev);
145 * If we didn't see ISA on a pci bridge, create some
146 * connection points now so it shows up "on motherboard".
148 if (!devclass_get_device(devclass_find("isa"), 0)) {
149 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
151 panic("legacy_attach isa");
152 device_probe_and_attach(child);
159 legacy_print_child(device_t bus, device_t child)
161 struct legacy_device *atdev = DEVTOAT(child);
164 retval += bus_print_child_header(bus, child);
165 if (atdev->lg_pcibus != -1)
166 retval += printf(" pcibus %d", atdev->lg_pcibus);
167 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
173 legacy_add_child(device_t bus, int order, const char *name, int unit)
176 struct legacy_device *atdev;
178 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
182 atdev->lg_pcibus = -1;
184 child = device_add_child_ordered(bus, order, name, unit);
186 free(atdev, M_LEGACYDEV);
188 /* should we free this in legacy_child_detached? */
189 device_set_ivars(child, atdev);
195 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
197 struct legacy_device *atdev = DEVTOAT(child);
200 case LEGACY_IVAR_PCIDOMAIN:
203 case LEGACY_IVAR_PCIBUS:
204 *result = atdev->lg_pcibus;
214 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
216 struct legacy_device *atdev = DEVTOAT(child);
219 case LEGACY_IVAR_PCIDOMAIN:
221 case LEGACY_IVAR_PCIBUS:
222 atdev->lg_pcibus = value;
231 * Legacy CPU attachment when ACPI is not available. Drivers like
232 * cpufreq(4) hang off this.
234 static void cpu_identify(driver_t *driver, device_t parent);
235 static int cpu_read_ivar(device_t dev, device_t child, int index,
237 static device_t cpu_add_child(device_t bus, int order, const char *name,
239 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
242 struct resource_list cd_rl;
243 struct pcpu *cd_pcpu;
246 static device_method_t cpu_methods[] = {
247 /* Device interface */
248 DEVMETHOD(device_identify, cpu_identify),
249 DEVMETHOD(device_probe, bus_generic_probe),
250 DEVMETHOD(device_attach, bus_generic_attach),
251 DEVMETHOD(device_detach, bus_generic_detach),
252 DEVMETHOD(device_shutdown, bus_generic_shutdown),
253 DEVMETHOD(device_suspend, bus_generic_suspend),
254 DEVMETHOD(device_resume, bus_generic_resume),
257 DEVMETHOD(bus_add_child, cpu_add_child),
258 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
259 DEVMETHOD(bus_print_child, bus_generic_print_child),
260 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
261 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
262 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
263 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
264 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
265 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
266 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
267 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
268 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
269 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
274 static driver_t cpu_driver = {
279 static devclass_t cpu_devclass;
280 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
283 cpu_identify(driver_t *driver, device_t parent)
289 * Attach a cpuX device for each CPU. We use an order of 150
290 * so that these devices are attached after the Host-PCI
291 * bridges (which are added at order 100).
293 for (i = 0; i <= mp_maxid; i++)
294 if (!CPU_ABSENT(i)) {
295 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
297 panic("legacy_attach cpu");
302 cpu_add_child(device_t bus, int order, const char *name, int unit)
304 struct cpu_device *cd;
308 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
311 resource_list_init(&cd->cd_rl);
312 pc = pcpu_find(device_get_unit(bus));
315 child = device_add_child_ordered(bus, order, name, unit);
317 pc->pc_device = child;
318 device_set_ivars(child, cd);
324 static struct resource_list *
325 cpu_get_rlist(device_t dev, device_t child)
327 struct cpu_device *cpdev;
329 cpdev = device_get_ivars(child);
330 return (&cpdev->cd_rl);
334 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
336 struct cpu_device *cpdev;
338 if (index != CPU_IVAR_PCPU)
340 cpdev = device_get_ivars(child);
341 *result = (uintptr_t)cpdev->cd_pcpu;