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 /*
 * 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.
 */

/** @addtogroup generic
 * @{
 */

/**
 * @file
 * @brief   CPU subsystem initialization and listing.
 */
 
#include <cpu.h>
#include <arch.h>
#include <arch/cpu.h>
#include <mm/slab.h>
#include <mm/page.h>
#include <mm/frame.h>
#include <arch/types.h>
#include <config.h>
#include <panic.h>
#include <memstr.h>
#include <adt/list.h>
#include <print.h>

cpu_t *cpus;

/** Initialize CPUs
 *
 * Initialize kernel CPUs support.
 *
 */
void cpu_init(void) {
    unsigned int i, j;
    
#ifdef CONFIG_SMP
    if (config.cpu_active == 1) {
#endif /* CONFIG_SMP */
        cpus = (cpu_t *) malloc(sizeof(cpu_t) * config.cpu_count,
                    FRAME_ATOMIC);
        if (!cpus)
            panic("Cannot allocate CPU structures.");

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

        for (i = 0; i < config.cpu_count; i++) {
            cpus[i].stack = (uint8_t *) frame_alloc(STACK_FRAMES, FRAME_KA | FRAME_ATOMIC);
            
            cpus[i].id = i;
            
            spinlock_initialize(&cpus[i].lock, "cpu_t.lock");

            for (j = 0; j < RQ_COUNT; j++) {
                spinlock_initialize(&cpus[i].rq[j].lock, "rq_t.lock");
                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();
}

/** List all processors. */
void cpu_list(void)
{
    unsigned int i;

    for (i = 0; i < config.cpu_count; i++) {
        if (cpus[i].active)
            cpu_print_report(&cpus[i]);
        else
            printf("cpu%u: not active\n", i);
    }
}

/** @}
 */