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      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 (at) 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
     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
     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