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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13 * purpose. It is provided "as is" without express or implied
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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 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, u_int order, const char *name,
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);
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),
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),
92 static driver_t legacy_driver = {
97 static devclass_t legacy_devclass;
99 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
102 legacy_probe(device_t dev)
105 device_set_desc(dev, "legacy system");
111 legacy_attach(device_t dev)
116 * Let our child drivers identify any child devices that they
117 * can find. Once that is done attach any devices that we
120 bus_generic_probe(dev);
121 bus_generic_attach(dev);
124 * If we didn't see ISA on a pci bridge, create some
125 * connection points now so it shows up "on motherboard".
127 if (!devclass_get_device(devclass_find("isa"), 0)) {
128 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
130 panic("legacy_attach isa");
131 device_probe_and_attach(child);
138 legacy_print_child(device_t bus, device_t child)
140 struct legacy_device *atdev = DEVTOAT(child);
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 */
152 legacy_add_child(device_t bus, u_int order, const char *name, int unit)
155 struct legacy_device *atdev;
157 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
161 atdev->lg_pcibus = -1;
163 child = device_add_child_ordered(bus, order, name, unit);
165 free(atdev, M_LEGACYDEV);
167 /* should we free this in legacy_child_detached? */
168 device_set_ivars(child, atdev);
174 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
176 struct legacy_device *atdev = DEVTOAT(child);
179 case LEGACY_IVAR_PCIDOMAIN:
182 case LEGACY_IVAR_PCIBUS:
183 *result = atdev->lg_pcibus;
193 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
195 struct legacy_device *atdev = DEVTOAT(child);
198 case LEGACY_IVAR_PCIDOMAIN:
200 case LEGACY_IVAR_PCIBUS:
201 atdev->lg_pcibus = value;
210 * Legacy CPU attachment when ACPI is not available. Drivers like
211 * cpufreq(4) hang off this.
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,
216 static device_t cpu_add_child(device_t bus, u_int order, const char *name,
218 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
221 struct resource_list cd_rl;
222 struct pcpu *cd_pcpu;
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),
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),
253 static driver_t cpu_driver = {
258 static devclass_t cpu_devclass;
259 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
262 cpu_identify(driver_t *driver, device_t parent)
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).
272 for (i = 0; i <= mp_maxid; i++)
273 if (!CPU_ABSENT(i)) {
274 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
276 panic("legacy_attach cpu");
281 cpu_add_child(device_t bus, u_int order, const char *name, int unit)
283 struct cpu_device *cd;
287 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
290 resource_list_init(&cd->cd_rl);
291 pc = pcpu_find(device_get_unit(bus));
294 child = device_add_child_ordered(bus, order, name, unit);
296 pc->pc_device = child;
297 device_set_ivars(child, cd);
303 static struct resource_list *
304 cpu_get_rlist(device_t dev, device_t child)
306 struct cpu_device *cpdev;
308 cpdev = device_get_ivars(child);
309 return (&cpdev->cd_rl);
313 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
315 struct cpu_device *cpdev;
317 if (index != CPU_IVAR_PCPU)
319 cpdev = device_get_ivars(child);
320 *result = (uintptr_t)cpdev->cd_pcpu;