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>
47 #include <i386/bios/mca_machdep.h>
50 #include "legacyvar.h"
52 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
53 struct legacy_device {
57 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
59 static int legacy_identify(driver_t *, device_t);
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, device_t, int, const char *, int);
64 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
65 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
67 static device_method_t legacy_methods[] = {
68 /* Device interface */
69 DEVMETHOD(device_identify, legacy_identify),
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_identify(driver_t *driver, device_t parent)
105 * Basically a static device, there's no point reinstalling it
108 if (device_get_state(parent) == DS_ATTACHED)
110 if (device_get_state(parent) == DS_INPROGRESS)
114 * Add child device with order of 11 so it gets probed
115 * after ACPI (which is at order 10).
117 if (BUS_ADD_CHILD(parent, parent, 11, "legacy", 0) == NULL)
118 panic("legacy: could not attach");
123 legacy_probe(device_t dev)
125 #ifdef ACPI_ENABLE_PCI
129 * Fail to probe if ACPI is ok.
131 acpi = devclass_get_device(devclass_find("acpi"), 0);
132 if (acpi != NULL && device_is_alive(acpi))
134 #endif /* ACPI_ENABLE_PCI */
135 device_set_desc(dev, "legacy system");
141 legacy_attach(device_t dev)
146 * Let our child drivers identify any child devices that they
147 * can find. Once that is done attach any devices that we
150 bus_generic_probe(dev);
151 bus_generic_attach(dev);
154 * If we didn't see EISA or ISA on a pci bridge, create some
155 * connection points now so they show up "on motherboard".
157 if (!devclass_get_device(devclass_find("eisa"), 0)) {
158 child = BUS_ADD_CHILD(dev, dev, 0, "eisa", 0);
160 panic("legacy_attach eisa");
161 device_probe_and_attach(child);
164 if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) {
165 child = BUS_ADD_CHILD(dev, dev, 0, "mca", 0);
167 panic("legacy_probe mca");
168 device_probe_and_attach(child);
171 if (!devclass_get_device(devclass_find("isa"), 0)) {
172 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
174 panic("legacy_attach isa");
175 device_probe_and_attach(child);
182 legacy_print_child(device_t bus, device_t child)
184 struct legacy_device *atdev = DEVTOAT(child);
187 retval += bus_print_child_header(bus, child);
188 if (atdev->lg_pcibus != -1)
189 retval += kprintf(" pcibus %d", atdev->lg_pcibus);
190 retval += kprintf(" on motherboard\n"); /* XXX "motherboard", ick */
196 legacy_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
199 struct legacy_device *atdev;
200 atdev = kmalloc(sizeof(struct legacy_device), M_LEGACYDEV,
204 atdev->lg_pcibus = -1;
206 child = device_add_child_ordered(bus, order, name, unit);
208 kfree(atdev, M_LEGACYDEV);
211 /* should we kfree this in legacy_child_detached? */
212 device_set_ivars(child, atdev);
218 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
220 struct legacy_device *atdev = DEVTOAT(child);
223 case LEGACY_IVAR_PCIDOMAIN:
226 case LEGACY_IVAR_PCIBUS:
227 *result = atdev->lg_pcibus;
236 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
238 struct legacy_device *atdev = DEVTOAT(child);
241 case LEGACY_IVAR_PCIDOMAIN:
243 case LEGACY_IVAR_PCIBUS:
244 atdev->lg_pcibus = value;
254 * Legacy CPU attachment when ACPI is not available. Drivers like
255 * cpufreq(4) hang off this.
257 static void cpu_identify(driver_t *driver, device_t parent);
258 static int cpu_read_ivar(device_t dev, device_t child, int index,
260 static device_t cpu_add_child(device_t bus, int order, const char *name,
262 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
265 struct resource_list cd_rl;
266 struct pcpu *cd_pcpu;
269 static device_method_t cpu_methods[] = {
270 /* Device interface */
271 DEVMETHOD(device_identify, cpu_identify),
272 DEVMETHOD(device_probe, bus_generic_probe),
273 DEVMETHOD(device_attach, bus_generic_attach),
274 DEVMETHOD(device_detach, bus_generic_detach),
275 DEVMETHOD(device_shutdown, bus_generic_shutdown),
276 DEVMETHOD(device_suspend, bus_generic_suspend),
277 DEVMETHOD(device_resume, bus_generic_resume),
280 DEVMETHOD(bus_add_child, cpu_add_child),
281 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
282 DEVMETHOD(bus_print_child, bus_generic_print_child),
283 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
284 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
285 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
286 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
287 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
288 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
289 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
290 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
291 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
292 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
297 static driver_t cpu_driver = {
302 static devclass_t cpu_devclass;
303 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
306 cpu_identify(driver_t *driver, device_t parent)
312 * Attach a cpuX device for each CPU. We use an order of 150
313 * so that these devices are attached after the Host-PCI
314 * bridges (which are added at order 100).
316 for (i = 0; i <= mp_maxid; i++)
317 if (!CPU_ABSENT(i)) {
318 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
320 panic("legacy_attach cpu");
325 cpu_add_child(device_t bus, int order, const char *name, int unit)
327 struct cpu_device *cd;
331 if ((cd = kmalloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
334 resource_list_init(&cd->cd_rl);
335 pc = pcpu_find(device_get_unit(bus));
338 child = device_add_child_ordered(bus, order, name, unit);
340 pc->pc_device = child;
341 device_set_ivars(child, cd);
347 static struct resource_list *
348 cpu_get_rlist(device_t dev, device_t child)
350 struct cpu_device *cpdev;
352 cpdev = device_get_ivars(child);
353 return (&cpdev->cd_rl);
357 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
359 struct cpu_device *cpdev;
361 if (index != CPU_IVAR_PCPU)
363 cpdev = device_get_ivars(child);
364 *result = (uintptr_t)cpdev->cd_pcpu;