2 * Copyright 1998 Massachusetts Institute of Technology
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5 * its documentation for any purpose and without fee is hereby
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29 * $FreeBSD: src/sys/i386/i386/legacy.c,v 1.63.2.1.4.1 2009/04/15 03:14:26 kensmith Exp $
33 * This code implements a system driver for legacy systems that do not
34 * support ACPI or when ACPI support is not present in the kernel.
37 #include <sys/param.h>
38 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
45 #include "legacyvar.h"
47 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
48 struct legacy_device {
52 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
54 static int legacy_identify(driver_t *, device_t);
55 static int legacy_probe(device_t);
56 static int legacy_attach(device_t);
57 static int legacy_print_child(device_t, device_t);
58 static device_t legacy_add_child(device_t, device_t, int, const char *, int);
59 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
60 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
62 static device_method_t legacy_methods[] = {
63 /* Device interface */
64 DEVMETHOD(device_identify, legacy_identify),
65 DEVMETHOD(device_probe, legacy_probe),
66 DEVMETHOD(device_attach, legacy_attach),
67 DEVMETHOD(device_detach, bus_generic_detach),
68 DEVMETHOD(device_shutdown, bus_generic_shutdown),
69 DEVMETHOD(device_suspend, bus_generic_suspend),
70 DEVMETHOD(device_resume, bus_generic_resume),
73 DEVMETHOD(bus_print_child, legacy_print_child),
74 DEVMETHOD(bus_add_child, legacy_add_child),
75 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
76 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
77 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
78 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
79 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
80 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
81 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
82 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
87 static driver_t legacy_driver = {
92 static devclass_t legacy_devclass;
94 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, NULL, NULL);
97 legacy_identify(driver_t *driver, device_t parent)
100 * Basically a static device, there's no point reinstalling it
103 if (device_get_state(parent) == DS_ATTACHED)
105 if (device_get_state(parent) == DS_INPROGRESS)
109 * Add child device with order of 11 so it gets probed
110 * after ACPI (which is at order 10).
112 if (BUS_ADD_CHILD(parent, parent, 11, "legacy", 0) == NULL)
113 panic("legacy: could not attach");
118 legacy_probe(device_t dev)
120 #ifdef ACPI_ENABLE_PCI
124 * Fail to probe if ACPI is ok.
126 acpi = devclass_get_device(devclass_find("acpi"), 0);
127 if (acpi != NULL && device_is_alive(acpi))
129 #endif /* ACPI_ENABLE_PCI */
130 device_set_desc(dev, "legacy system");
136 legacy_attach(device_t dev)
141 * Let our child drivers identify any child devices that they
142 * can find. Once that is done attach any devices that we
145 bus_generic_probe(dev);
146 bus_generic_attach(dev);
149 * If we didn't see ISA on a pci bridge, create a
150 * connection point now so it shows up "on motherboard".
152 if (!devclass_get_device(devclass_find("isa"), 0)) {
153 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
155 panic("legacy_attach isa");
156 device_probe_and_attach(child);
163 legacy_print_child(device_t bus, device_t child)
165 struct legacy_device *atdev = DEVTOAT(child);
168 retval += bus_print_child_header(bus, child);
169 if (atdev->lg_pcibus != -1)
170 retval += kprintf(" pcibus %d", atdev->lg_pcibus);
171 retval += kprintf(" on motherboard\n"); /* XXX "motherboard", ick */
177 legacy_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
180 struct legacy_device *atdev;
181 atdev = kmalloc(sizeof(struct legacy_device), M_LEGACYDEV,
185 atdev->lg_pcibus = -1;
187 child = device_add_child_ordered(bus, order, name, unit);
189 kfree(atdev, M_LEGACYDEV);
192 /* should we kfree this in legacy_child_detached? */
193 device_set_ivars(child, atdev);
199 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
201 struct legacy_device *atdev = DEVTOAT(child);
204 case LEGACY_IVAR_PCIDOMAIN:
207 case LEGACY_IVAR_PCIBUS:
208 *result = atdev->lg_pcibus;
217 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
219 struct legacy_device *atdev = DEVTOAT(child);
222 case LEGACY_IVAR_PCIDOMAIN:
224 case LEGACY_IVAR_PCIBUS:
225 atdev->lg_pcibus = value;
235 * Legacy CPU attachment when ACPI is not available. Drivers like
236 * cpufreq(4) hang off this.
238 static void cpu_identify(driver_t *driver, device_t parent);
239 static int cpu_read_ivar(device_t dev, device_t child, int index,
241 static device_t cpu_add_child(device_t bus, int order, const char *name,
243 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
246 struct resource_list cd_rl;
247 struct pcpu *cd_pcpu;
250 static device_method_t cpu_methods[] = {
251 /* Device interface */
252 DEVMETHOD(device_identify, cpu_identify),
253 DEVMETHOD(device_probe, bus_generic_probe),
254 DEVMETHOD(device_attach, bus_generic_attach),
255 DEVMETHOD(device_detach, bus_generic_detach),
256 DEVMETHOD(device_shutdown, bus_generic_shutdown),
257 DEVMETHOD(device_suspend, bus_generic_suspend),
258 DEVMETHOD(device_resume, bus_generic_resume),
261 DEVMETHOD(bus_add_child, cpu_add_child),
262 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
263 DEVMETHOD(bus_print_child, bus_generic_print_child),
264 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
265 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
266 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
267 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
268 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
269 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
270 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
271 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
272 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
273 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
278 static driver_t cpu_driver = {
283 static devclass_t cpu_devclass;
284 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, NULL, NULL);
287 cpu_identify(driver_t *driver, device_t parent)
293 * Attach a cpuX device for each CPU. We use an order of 150
294 * so that these devices are attached after the Host-PCI
295 * bridges (which are added at order 100).
297 for (i = 0; i <= mp_maxid; i++)
298 if (!CPU_ABSENT(i)) {
299 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
301 panic("legacy_attach cpu");
306 cpu_add_child(device_t bus, int order, const char *name, int unit)
308 struct cpu_device *cd;
312 if ((cd = kmalloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
315 resource_list_init(&cd->cd_rl);
316 pc = pcpu_find(device_get_unit(bus));
319 child = device_add_child_ordered(bus, order, name, unit);
321 pc->pc_device = child;
322 device_set_ivars(child, cd);
328 static struct resource_list *
329 cpu_get_rlist(device_t dev, device_t child)
331 struct cpu_device *cpdev;
333 cpdev = device_get_ivars(child);
334 return (&cpdev->cd_rl);
338 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
340 struct cpu_device *cpdev;
342 if (index != CPU_IVAR_PCPU)
344 cpdev = device_get_ivars(child);
345 *result = (uintptr_t)cpdev->cd_pcpu;