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      1 /*	$NetBSD: cpu.c,v 1.6 2022/03/03 06:27:03 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 Soren S. Jorvang.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      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.
     14  *
     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
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.6 2022/03/03 06:27:03 riastradh Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/systm.h>
     33 #include <sys/device.h>
     34 #include <sys/cpu.h>
     35 
     36 #include <mips/locore.h>
     37 
     38 #include <machine/autoconf.h>
     39 
     40 #include "ioconf.h"
     41 
     42 static int cpumatch(device_t, cfdata_t, void *);
     43 static void cpuattach(device_t, device_t, void *);
     44 
     45 CFATTACH_DECL_NEW(cpu, 0,
     46     cpumatch, cpuattach, NULL, NULL);
     47 
     48 static int cpu_attached;
     49 
     50 int
     51 cpumatch(device_t parent, cfdata_t cf, void *aux)
     52 {
     53 	struct mainbus_attach_args *ma = aux;
     54 
     55 	/* make sure that we're looking for a CPU. */
     56 	if (strcmp(ma->ma_name, cpu_cd.cd_name) != 0)
     57 		return 0;
     58 
     59 	return !cpu_attached;
     60 }
     61 
     62 void
     63 cpuattach(device_t parent, device_t self, void *aux)
     64 {
     65 
     66 	struct cpu_info * const ci = curcpu();
     67 
     68 	ci->ci_dev = self;
     69 	device_set_private(self, ci);
     70 
     71 	aprint_normal(": ");
     72 	cpu_attached = 1;
     73 
     74 	cpu_identify(self);
     75 }
     76