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cpu_mainbus.c revision 1.14 
      1 /*	$NetBSD: cpu_mainbus.c,v 1.14 2014/03/28 21:43:01 matt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Mark Brinicombe.
      5  * Copyright (c) 1995 Brini.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by Brini.
     19  * 4. The name of the company nor the name of the author may be used to
     20  *    endorse or promote products derived from this software without specific
     21  *    prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
     24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     27  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     29  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  * RiscBSD kernel project
     36  *
     37  * cpu.c
     38  *
     39  * Probing and configuration for the master cpu
     40  *
     41  * Created      : 10/10/95
     42  */
     43 
     44 #include "locators.h"
     45 
     46 #include <sys/cdefs.h>
     47 __KERNEL_RCSID(0, "$NetBSD: cpu_mainbus.c,v 1.14 2014/03/28 21:43:01 matt Exp $");
     48 
     49 #include <sys/param.h>
     50 #include <sys/systm.h>
     51 #include <sys/cpu.h>
     52 #include <sys/device.h>
     53 #include <sys/proc.h>
     54 
     55 #include <arm/mainbus/mainbus.h>
     56 
     57 /*
     58  * Prototypes
     59  */
     60 static int cpu_mainbus_match(device_t, cfdata_t, void *);
     61 static void cpu_mainbus_attach(device_t, device_t, void *);
     62 
     63 /*
     64  * int cpumatch(device_t parent, cfdata_t cf, void *aux)
     65  *
     66  * Probe for the main cpu. Currently all this does is return 1 to
     67  * indicate that the cpu was found.
     68  */
     69 #ifdef MULTIPROCESSOR
     70 extern u_int arm_cpu_max;
     71 #else
     72 #define	arm_cpu_max		1
     73 #endif
     74 
     75 static int
     76 cpu_mainbus_match(device_t parent, cfdata_t cf, void *aux)
     77 {
     78 	struct mainbus_attach_args * const mb = aux;
     79 	int id = mb->mb_core;
     80 
     81 	if (id != MAINBUSCF_CORE_DEFAULT) {
     82 		if (id >= arm_cpu_max || kcpuset_isset(kcpuset_attached, id))
     83 			return 0;
     84 		if (id == 0 && cpu_info_store.ci_dev != NULL)
     85 			return 0;
     86 		return 1;
     87 	}
     88 
     89 	for (id = 0; id < arm_cpu_max; id++) {
     90 #ifdef MULTIPROCESSOR
     91 		if (cpu_info[id] != NULL && cpu_info[id]->ci_dev != NULL)
     92 			continue;
     93 #else
     94 		if (id != 0 || cpu_info_store.ci_dev != NULL)
     95 			continue;
     96 #endif
     97 		mb->mb_core = id;
     98 		return 1;
     99 	}
    100 	return 0;
    101 }
    102 
    103 /*
    104  * void cpusattach(device_t parent, device_t dev, void *aux)
    105  *
    106  * Attach the main cpu
    107  */
    108 
    109 static void
    110 cpu_mainbus_attach(device_t parent, device_t self, void *aux)
    111 {
    112 	struct mainbus_attach_args * const mb = aux;
    113 
    114 	cpu_attach(self, mb->mb_core);
    115 }
    116 
    117 CFATTACH_DECL_NEW(cpu_mainbus, 0,
    118     cpu_mainbus_match, cpu_mainbus_attach, NULL, NULL);
    119