127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/* $NetBSD: cpu_mainbus.c,v 1.16 2014/10/29 14:14:14 skrll Exp $ */
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/*
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* Copyright (c) 1995 Mark Brinicombe.
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* Copyright (c) 1995 Brini.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* RiscBSD kernel project
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*
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* cpu.c
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*
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* Probing and configuration for the master cpu
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*
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* Created : 10/10/95
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*/
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#include "locators.h"
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#include "opt_multiprocessor.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: cpu_mainbus.c,v 1.16 2014/10/29 14:14:14 skrll Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/cpu.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <arm/mainbus/mainbus.h>
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/*
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* Prototypes
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*/
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static int cpu_mainbus_match(device_t, cfdata_t, void *);
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static void cpu_mainbus_attach(device_t, device_t, void *);
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/*
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* int cpumatch(device_t parent, cfdata_t cf, void *aux)
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*
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* Probe for the main cpu. Currently all this does is return 1 to
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* indicate that the cpu was found.
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*/
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#ifdef MULTIPROCESSOR
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extern u_int arm_cpu_max;
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#else
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#define arm_cpu_max 1
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#endif
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static int
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cpu_mainbus_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct mainbus_attach_args * const mb = aux;
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int id = mb->mb_core;
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if (id != MAINBUSCF_CORE_DEFAULT) {
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if (id == 0)
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return cpu_info_store.ci_dev == NULL;
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if (id >= arm_cpu_max)
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return 0;
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#ifdef MULTIPROCESSOR
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if (cpu_info[id] != NULL)
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return 0;
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#endif
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return 1;
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}
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if (cpu_info_store.ci_dev == NULL) {
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mb->mb_core = 0;
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return 1;
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}
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#ifdef MULTIPROCESSOR
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for (id = 1; id < arm_cpu_max; id++) {
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if (cpu_info[id] != NULL)
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continue;
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mb->mb_core = id;
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return 1;
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}
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#endif
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return 0;
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}
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/*
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* void cpusattach(device_t parent, device_t dev, void *aux)
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*
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* Attach the main cpu
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*/
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static void
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cpu_mainbus_attach(device_t parent, device_t self, void *aux)
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{
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struct mainbus_attach_args * const mb = aux;
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cpu_attach(self, mb->mb_core);
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}
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CFATTACH_DECL_NEW(cpu_mainbus, 0,
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cpu_mainbus_match, cpu_mainbus_attach, NULL, NULL);
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