source: mainline/generic/src/cpu/cpu.c@ 36a140b

/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <cpu.h>
#include <arch.h>
#include <arch/cpu.h>
#include <mm/heap.h>
#include <mm/page.h>
#include <mm/frame.h>
#include <arch/types.h>
#include <config.h>
#include <panic.h>
#include <typedefs.h>
#include <memstr.h>
#include <list.h>

cpu_t *cpus;

/** Initialize CPUs
 *
 * Initialize kernel CPUs support.
 *
 */
void cpu_init(void) {
        int i, j;
        
        #ifdef CONFIG_SMP
        if (config.cpu_active == 1) {
        #endif /* CONFIG_SMP */
                cpus = (cpu_t *) malloc(sizeof(cpu_t) * config.cpu_count);
                if (!cpus)
                        panic("malloc/cpus");

                /* initialize everything */
                memsetb((__address) cpus, sizeof(cpu_t) * config.cpu_count, 0);

                for (i=0; i < config.cpu_count; i++) {
                        cpus[i].stack = (__u8 *) frame_alloc(FRAME_KA | FRAME_PANIC);
                        if (!cpus[i].stack)
                                panic("malloc/cpus[%d].stack\n", i);
                        
                        cpus[i].id = i;
                        
                        #ifdef CONFIG_SMP
                        waitq_initialize(&cpus[i].kcpulb_wq);
                        #endif /* __SMP */
                        
                        for (j = 0; j < RQ_COUNT; j++) {
                                list_initialize(&cpus[i].rq[j].rq_head);
                        }
                }
                
        #ifdef CONFIG_SMP
        }
        #endif /* CONFIG_SMP */

        CPU = &cpus[config.cpu_active-1];
        
        CPU->active = 1;
        CPU->tlb_active = 1;
        
        cpu_identify();
        cpu_arch_init();
}