1 /* $NetBSD: acpi_pcd.c,v 1.2 2021/01/29 15:49:55 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2020 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /*
30 * This is a driver for the Processor Container Device. The device acts
31 * like a bus in the node namespace. Child nodes can be either processor
32 * devices or other processor containers.
33 */
34
35 #include <sys/cdefs.h>
36 __KERNEL_RCSID(0, "$NetBSD: acpi_pcd.c,v 1.2 2021/01/29 15:49:55 thorpej Exp $");
37
38 #include <sys/param.h>
39 #include <sys/bus.h>
40 #include <sys/cpu.h>
41 #include <sys/device.h>
42
43 #include <dev/acpi/acpireg.h>
44 #include <dev/acpi/acpivar.h>
45
46 static const struct device_compatible_entry compat_data[] = {
47 { .compat = "ACPI0010" }, /* Processor Container Device */
48 DEVICE_COMPAT_EOL
49 };
50
51 static int acpi_pcd_match(device_t, cfdata_t, void *);
52 static void acpi_pcd_attach(device_t, device_t, void *);
53
54 CFATTACH_DECL_NEW(acpipcd, 0, acpi_pcd_match, acpi_pcd_attach, NULL, NULL);
55
56 static int
acpi_pcd_match(device_t parent,cfdata_t cf,void * aux)57 acpi_pcd_match(device_t parent, cfdata_t cf, void *aux)
58 {
59 struct acpi_attach_args *aa = aux;
60
61 return acpi_compatible_match(aa, compat_data);
62 }
63
64 static void
acpi_pcd_attach(device_t parent,device_t self,void * aux)65 acpi_pcd_attach(device_t parent, device_t self, void *aux)
66 {
67 struct acpi_attach_args * const aa = aux;
68
69 aprint_naive("\n");
70 aprint_normal(": Processor Container Device\n");
71
72 /*
73 * Initialize the container device. ACPICA should have done this
74 * for us, but may have done so before a node that this one depends
75 * on had been initialized.
76 */
77 AcpiEvaluateObject(aa->aa_node->ad_handle, "_INI", NULL, NULL);
78 }
79