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cpu_mainbus.c revision 1.13.2.2
      1  1.13.2.1       tls /*	$NetBSD: cpu_mainbus.c,v 1.13.2.2 2017/12/03 11:35:54 jdolecek Exp $	*/
      2       1.1      matt 
      3       1.1      matt /*
      4       1.1      matt  * Copyright (c) 1995 Mark Brinicombe.
      5       1.1      matt  * Copyright (c) 1995 Brini.
      6       1.1      matt  * All rights reserved.
      7       1.1      matt  *
      8       1.1      matt  * Redistribution and use in source and binary forms, with or without
      9       1.1      matt  * modification, are permitted provided that the following conditions
     10       1.1      matt  * are met:
     11       1.1      matt  * 1. Redistributions of source code must retain the above copyright
     12       1.1      matt  *    notice, this list of conditions and the following disclaimer.
     13       1.1      matt  * 2. Redistributions in binary form must reproduce the above copyright
     14       1.1      matt  *    notice, this list of conditions and the following disclaimer in the
     15       1.1      matt  *    documentation and/or other materials provided with the distribution.
     16       1.1      matt  * 3. All advertising materials mentioning features or use of this software
     17       1.1      matt  *    must display the following acknowledgement:
     18       1.1      matt  *	This product includes software developed by Brini.
     19       1.1      matt  * 4. The name of the company nor the name of the author may be used to
     20       1.1      matt  *    endorse or promote products derived from this software without specific
     21       1.1      matt  *    prior written permission.
     22       1.1      matt  *
     23       1.1      matt  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
     24       1.1      matt  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     25       1.1      matt  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26       1.1      matt  * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     27       1.1      matt  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     28       1.1      matt  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     29       1.1      matt  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30       1.1      matt  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31       1.1      matt  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32       1.1      matt  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33       1.1      matt  * SUCH DAMAGE.
     34       1.1      matt  *
     35       1.1      matt  * RiscBSD kernel project
     36       1.1      matt  *
     37       1.1      matt  * cpu.c
     38       1.1      matt  *
     39       1.1      matt  * Probing and configuration for the master cpu
     40       1.1      matt  *
     41       1.1      matt  * Created      : 10/10/95
     42       1.1      matt  */
     43       1.7     lukem 
     44      1.13      matt #include "locators.h"
     45  1.13.2.2  jdolecek #include "opt_multiprocessor.h"
     46      1.13      matt 
     47       1.7     lukem #include <sys/cdefs.h>
     48  1.13.2.1       tls __KERNEL_RCSID(0, "$NetBSD: cpu_mainbus.c,v 1.13.2.2 2017/12/03 11:35:54 jdolecek Exp $");
     49       1.1      matt 
     50       1.1      matt #include <sys/param.h>
     51       1.1      matt #include <sys/systm.h>
     52      1.13      matt #include <sys/cpu.h>
     53       1.1      matt #include <sys/device.h>
     54       1.1      matt #include <sys/proc.h>
     55      1.13      matt 
     56      1.13      matt #include <arm/mainbus/mainbus.h>
     57       1.1      matt 
     58       1.3     chris /*
     59       1.3     chris  * Prototypes
     60       1.3     chris  */
     61      1.11      matt static int cpu_mainbus_match(device_t, cfdata_t, void *);
     62      1.11      matt static void cpu_mainbus_attach(device_t, device_t, void *);
     63       1.3     chris 
     64       1.1      matt /*
     65      1.11      matt  * int cpumatch(device_t parent, cfdata_t cf, void *aux)
     66       1.1      matt  *
     67       1.1      matt  * Probe for the main cpu. Currently all this does is return 1 to
     68       1.1      matt  * indicate that the cpu was found.
     69       1.1      matt  */
     70      1.13      matt #ifdef MULTIPROCESSOR
     71      1.13      matt extern u_int arm_cpu_max;
     72      1.13      matt #else
     73  1.13.2.1       tls #define	arm_cpu_max		1
     74      1.13      matt #endif
     75       1.1      matt 
     76       1.1      matt static int
     77      1.11      matt cpu_mainbus_match(device_t parent, cfdata_t cf, void *aux)
     78       1.1      matt {
     79      1.13      matt 	struct mainbus_attach_args * const mb = aux;
     80      1.13      matt 	int id = mb->mb_core;
     81      1.13      matt 
     82      1.13      matt 	if (id != MAINBUSCF_CORE_DEFAULT) {
     83  1.13.2.1       tls 		if (id == 0)
     84  1.13.2.1       tls 			return cpu_info_store.ci_dev == NULL;
     85  1.13.2.1       tls 		if (id >= arm_cpu_max)
     86      1.13      matt 			return 0;
     87  1.13.2.1       tls #ifdef MULTIPROCESSOR
     88  1.13.2.1       tls 		if (cpu_info[id] != NULL)
     89      1.13      matt 			return 0;
     90  1.13.2.1       tls #endif
     91  1.13.2.1       tls 		return 1;
     92  1.13.2.1       tls 	}
     93  1.13.2.1       tls 
     94  1.13.2.1       tls 	if (cpu_info_store.ci_dev == NULL) {
     95  1.13.2.1       tls 		mb->mb_core = 0;
     96      1.13      matt 		return 1;
     97      1.13      matt 	}
     98      1.13      matt 
     99      1.13      matt #ifdef MULTIPROCESSOR
    100  1.13.2.1       tls 	for (id = 1; id < arm_cpu_max; id++) {
    101  1.13.2.1       tls 		if (cpu_info[id] != NULL)
    102      1.13      matt 			continue;
    103      1.13      matt 		mb->mb_core = id;
    104      1.13      matt 		return 1;
    105      1.13      matt 	}
    106  1.13.2.1       tls #endif
    107  1.13.2.1       tls 
    108      1.13      matt 	return 0;
    109       1.1      matt }
    110       1.1      matt 
    111       1.1      matt /*
    112      1.11      matt  * void cpusattach(device_t parent, device_t dev, void *aux)
    113       1.1      matt  *
    114       1.1      matt  * Attach the main cpu
    115       1.1      matt  */
    116       1.1      matt 
    117       1.1      matt static void
    118      1.11      matt cpu_mainbus_attach(device_t parent, device_t self, void *aux)
    119       1.1      matt {
    120      1.13      matt 	struct mainbus_attach_args * const mb = aux;
    121      1.13      matt 
    122      1.13      matt 	cpu_attach(self, mb->mb_core);
    123       1.1      matt }
    124       1.1      matt 
    125      1.11      matt CFATTACH_DECL_NEW(cpu_mainbus, 0,
    126       1.6   thorpej     cpu_mainbus_match, cpu_mainbus_attach, NULL, NULL);
    127