2 * Copyright (c) 2003-2005 Nate Lawson (SDG)
3 * Copyright (c) 2001 Michael Smith
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/dev/acpica/acpi_cpu.c,v 1.72 2008/04/12 12:06:00 rpaulo Exp $
28 * $DragonFly: src/sys/dev/acpica5/acpi_cpu.c,v 1.21 2008/09/05 10:28:35 hasso Exp $
33 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/sysctl.h>
38 #include <machine/globaldata.h>
39 #include <machine/smp.h>
45 #define ACPI_NOTIFY_CX_STATES 0x81 /* _CST changed. */
47 static int acpi_cpu_probe(device_t dev);
48 static int acpi_cpu_attach(device_t dev);
49 static struct resource_list *
50 acpi_cpu_get_rlist(device_t, device_t);
51 static struct resource *
52 acpi_cpu_alloc_resource(device_t, device_t,
53 int, int *, u_long, u_long, u_long, u_int);
54 static int acpi_cpu_release_resource(device_t, device_t,
55 int, int, struct resource *);
57 static int acpi_cpu_get_id(uint32_t, uint32_t *, uint32_t *);
58 static void acpi_cpu_notify(ACPI_HANDLE, UINT32, void *);
60 static device_method_t acpi_cpu_methods[] = {
61 /* Device interface */
62 DEVMETHOD(device_probe, acpi_cpu_probe),
63 DEVMETHOD(device_attach, acpi_cpu_attach),
64 DEVMETHOD(device_detach, bus_generic_detach),
65 DEVMETHOD(device_shutdown, bus_generic_shutdown),
66 DEVMETHOD(device_suspend, bus_generic_suspend),
67 DEVMETHOD(device_resume, bus_generic_resume),
70 DEVMETHOD(bus_add_child, bus_generic_add_child),
71 DEVMETHOD(bus_print_child, bus_generic_print_child),
72 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar),
73 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
74 DEVMETHOD(bus_get_resource_list, acpi_cpu_get_rlist),
75 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
76 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
77 DEVMETHOD(bus_alloc_resource, acpi_cpu_alloc_resource),
78 DEVMETHOD(bus_release_resource, acpi_cpu_release_resource),
79 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
80 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
81 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
82 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
83 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
88 static driver_t acpi_cpu_driver = {
91 sizeof(struct acpi_cpux_softc)
94 static devclass_t acpi_cpu_devclass;
95 DRIVER_MODULE(cpu, acpi, acpi_cpu_driver, acpi_cpu_devclass, 0, 0);
96 MODULE_DEPEND(cpu, acpi, 1, 1, 1);
99 acpi_cpu_probe(device_t dev)
107 if (acpi_disabled("cpu") || acpi_get_type(dev) != ACPI_TYPE_PROCESSOR)
110 handle = acpi_get_handle(dev);
113 * Get our Processor object.
116 buf.Length = ACPI_ALLOCATE_BUFFER;
117 status = AcpiEvaluateObject(handle, NULL, NULL, &buf);
118 if (ACPI_FAILURE(status)) {
119 device_printf(dev, "probe failed to get Processor obj - %s\n",
120 AcpiFormatException(status));
124 obj = (ACPI_OBJECT *)buf.Pointer;
125 if (obj->Type != ACPI_TYPE_PROCESSOR) {
126 device_printf(dev, "Processor object has bad type %d\n", obj->Type);
131 acpi_id = obj->Processor.ProcId;
135 * Find the processor associated with our unit. We could use the
136 * ProcId as a key, however, some boxes do not have the same values
137 * in their Processor object as the ProcId values in the MADT.
139 if (acpi_cpu_get_id(device_get_unit(dev), &acpi_id, &cpu_id) != 0)
142 acpi_set_magic(dev, cpu_id);
143 device_set_desc(dev, "ACPI CPU");
149 acpi_cpu_attach(device_t dev)
151 struct acpi_cpux_softc *sc = device_get_softc(dev);
155 struct acpi_softc *acpi_sc;
157 handle = acpi_get_handle(dev);
158 cpu_id = acpi_get_magic(dev);
160 acpi_sc = acpi_device_get_parent_softc(dev);
162 sysctl_ctx_init(&sc->glob_sysctl_ctx);
163 sc->glob_sysctl_tree = SYSCTL_ADD_NODE(&sc->glob_sysctl_ctx,
164 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
165 OID_AUTO, "cpu", CTLFLAG_RD, 0,
166 "node for CPU global settings");
167 if (sc->glob_sysctl_tree == NULL)
171 sysctl_ctx_init(&sc->pcpu_sysctl_ctx);
172 sc->pcpu_sysctl_tree = SYSCTL_ADD_NODE(&sc->pcpu_sysctl_ctx,
173 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
174 OID_AUTO, device_get_nameunit(dev), CTLFLAG_RD, 0,
175 "node for per-CPU settings");
176 if (sc->pcpu_sysctl_tree == NULL) {
177 sysctl_ctx_free(&sc->glob_sysctl_ctx);
181 child = BUS_ADD_CHILD(dev, dev, 0, "cpu_cst", -1);
184 acpi_set_handle(child, handle);
185 acpi_set_magic(child, cpu_id);
186 sc->cpux_cst = child;
188 child = BUS_ADD_CHILD(dev, dev, 0, "cpu_pst", -1);
191 acpi_set_handle(child, handle);
192 acpi_set_magic(child, cpu_id);
194 bus_generic_attach(dev);
196 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY, acpi_cpu_notify, sc);
202 * All resources are assigned directly to us by acpi,
203 * so 'child' is bypassed here.
205 static struct resource_list *
206 acpi_cpu_get_rlist(device_t dev, device_t child __unused)
208 return BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
211 static struct resource *
212 acpi_cpu_alloc_resource(device_t dev, device_t child __unused,
213 int type, int *rid, u_long start, u_long end,
214 u_long count, u_int flags)
216 return BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, type, rid,
217 start, end, count, flags);
221 acpi_cpu_release_resource(device_t dev, device_t child __unused,
222 int type, int rid, struct resource *r)
224 return BUS_RELEASE_RESOURCE(device_get_parent(dev), dev, type, rid, r);
228 * Find the nth present CPU and return its pc_cpuid as well as set the
229 * pc_acpi_id from the most reliable source.
232 acpi_cpu_get_id(uint32_t idx, uint32_t *acpi_id, uint32_t *cpu_id)
234 struct mdglobaldata *md;
237 KASSERT(acpi_id != NULL, ("Null acpi_id"));
238 KASSERT(cpu_id != NULL, ("Null cpu_id"));
239 for (i = 0; i < ncpus; i++) {
240 if ((smp_active_mask & CPUMASK(i)) == 0)
242 md = (struct mdglobaldata *)globaldata_find(i);
243 KASSERT(md != NULL, ("no pcpu data for %d", i));
246 * If pc_acpi_id was not initialized (e.g., a non-APIC UP box)
247 * override it with the value from the ASL. Otherwise, if the
248 * two don't match, prefer the MADT-derived value. Finally,
249 * return the pc_cpuid to reference this processor.
251 if (md->gd_acpi_id == 0xffffffff)
252 md->gd_acpi_id = *acpi_id;
253 else if (md->gd_acpi_id != *acpi_id)
254 *acpi_id = md->gd_acpi_id;
255 *cpu_id = md->mi.gd_cpuid;
263 acpi_cpu_notify(ACPI_HANDLE handler __unused, UINT32 notify, void *xsc)
265 struct acpi_cpux_softc *sc = xsc;
268 case ACPI_NOTIFY_CX_STATES:
269 if (sc->cpux_cst_notify != NULL)
270 sc->cpux_cst_notify(sc->cpux_cst);