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
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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
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33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 * This code implements a system driver for legacy systems that do not
38 * support ACPI or when ACPI support is not present in the kernel.
41 #include <sys/param.h>
42 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/module.h>
48 #include <machine/bus.h>
53 #include <machine/clock.h>
54 #include <machine/resource.h>
55 #include <x86/legacyvar.h>
57 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
58 struct legacy_device {
64 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
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, u_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_probe, legacy_probe),
77 DEVMETHOD(device_attach, legacy_attach),
78 DEVMETHOD(device_detach, bus_generic_detach),
79 DEVMETHOD(device_shutdown, bus_generic_shutdown),
80 DEVMETHOD(device_suspend, bus_generic_suspend),
81 DEVMETHOD(device_resume, bus_generic_resume),
84 DEVMETHOD(bus_print_child, legacy_print_child),
85 DEVMETHOD(bus_add_child, legacy_add_child),
86 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
87 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
88 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
89 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_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_probe(device_t dev)
112 device_set_desc(dev, "legacy system");
118 legacy_attach(device_t dev)
123 * Let our child drivers identify any child devices that they
124 * can find. Once that is done attach any devices that we
127 bus_generic_probe(dev);
128 bus_generic_attach(dev);
131 * If we didn't see EISA or ISA on a pci bridge, create some
132 * connection points now so they show up "on motherboard".
135 if (!devclass_get_device(devclass_find("eisa"), 0)) {
136 child = BUS_ADD_CHILD(dev, 0, "eisa", 0);
138 panic("legacy_attach eisa");
139 device_probe_and_attach(child);
142 if (!devclass_get_device(devclass_find("isa"), 0)) {
143 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
145 panic("legacy_attach isa");
146 device_probe_and_attach(child);
153 legacy_print_child(device_t bus, device_t child)
155 struct legacy_device *atdev = DEVTOAT(child);
158 retval += bus_print_child_header(bus, child);
159 if (atdev->lg_pcibus != -1)
160 retval += printf(" pcibus %d", atdev->lg_pcibus);
161 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
167 legacy_add_child(device_t bus, u_int order, const char *name, int unit)
170 struct legacy_device *atdev;
172 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
176 atdev->lg_pcibus = -1;
177 atdev->lg_pcislot = -1;
178 atdev->lg_pcifunc = -1;
180 child = device_add_child_ordered(bus, order, name, unit);
182 free(atdev, M_LEGACYDEV);
184 /* should we free this in legacy_child_detached? */
185 device_set_ivars(child, atdev);
191 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
193 struct legacy_device *atdev = DEVTOAT(child);
196 case LEGACY_IVAR_PCIDOMAIN:
199 case LEGACY_IVAR_PCIBUS:
200 *result = atdev->lg_pcibus;
202 case LEGACY_IVAR_PCISLOT:
203 *result = atdev->lg_pcislot;
205 case LEGACY_IVAR_PCIFUNC:
206 *result = atdev->lg_pcifunc;
216 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
218 struct legacy_device *atdev = DEVTOAT(child);
221 case LEGACY_IVAR_PCIDOMAIN:
223 case LEGACY_IVAR_PCIBUS:
224 atdev->lg_pcibus = value;
226 case LEGACY_IVAR_PCISLOT:
227 atdev->lg_pcislot = value;
229 case LEGACY_IVAR_PCIFUNC:
230 atdev->lg_pcifunc = value;
239 * Legacy CPU attachment when ACPI is not available. Drivers like
240 * cpufreq(4) hang off this.
242 static void cpu_identify(driver_t *driver, device_t parent);
243 static int cpu_read_ivar(device_t dev, device_t child, int index,
245 static device_t cpu_add_child(device_t bus, u_int order, const char *name,
247 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
250 struct resource_list cd_rl;
251 struct pcpu *cd_pcpu;
254 static device_method_t cpu_methods[] = {
255 /* Device interface */
256 DEVMETHOD(device_identify, cpu_identify),
257 DEVMETHOD(device_probe, bus_generic_probe),
258 DEVMETHOD(device_attach, bus_generic_attach),
259 DEVMETHOD(device_detach, bus_generic_detach),
260 DEVMETHOD(device_shutdown, bus_generic_shutdown),
261 DEVMETHOD(device_suspend, bus_generic_suspend),
262 DEVMETHOD(device_resume, bus_generic_resume),
265 DEVMETHOD(bus_add_child, cpu_add_child),
266 DEVMETHOD(bus_read_ivar, cpu_read_ivar),
267 DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
268 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
269 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
270 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
271 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
272 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
273 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
274 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
275 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
280 static driver_t cpu_driver = {
285 static devclass_t cpu_devclass;
286 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
289 cpu_identify(driver_t *driver, device_t parent)
295 * Attach a cpuX device for each CPU. We use an order of 150
296 * so that these devices are attached after the Host-PCI
297 * bridges (which are added at order 100).
300 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
302 panic("legacy_attach cpu");
307 cpu_add_child(device_t bus, u_int order, const char *name, int unit)
309 struct cpu_device *cd;
313 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
316 resource_list_init(&cd->cd_rl);
317 pc = pcpu_find(device_get_unit(bus));
320 child = device_add_child_ordered(bus, order, name, unit);
322 pc->pc_device = child;
323 device_set_ivars(child, cd);
329 static struct resource_list *
330 cpu_get_rlist(device_t dev, device_t child)
332 struct cpu_device *cpdev;
334 cpdev = device_get_ivars(child);
335 return (&cpdev->cd_rl);
339 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
341 struct cpu_device *cpdev;
345 cpdev = device_get_ivars(child);
346 *result = (uintptr_t)cpdev->cd_pcpu;
348 case CPU_IVAR_NOMINAL_MHZ:
349 if (tsc_is_invariant) {
350 *result = (uintptr_t)(atomic_load_acq_64(&tsc_freq) /