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1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
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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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 *
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 * - 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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 * - 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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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup main
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 * @{
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 */
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/**
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 * @file
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 * @brief   Kernel initialization thread.
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 *
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 * This file contains kinit kernel thread which carries out
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 * high level system initialization.
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 *
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 * This file is responsible for finishing SMP configuration
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 * and creation of userspace init tasks.
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 */
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#include <main/kinit.h>
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#include <config.h>
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#include <arch.h>
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#include <proc/scheduler.h>
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#include <proc/task.h>
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#include <proc/thread.h>
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#include <panic.h>
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#include <func.h>
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#include <cpu.h>
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#include <arch/asm.h>
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#include <mm/page.h>
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#include <arch/mm/page.h>
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#include <mm/as.h>
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#include <mm/frame.h>
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#include <print.h>
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#include <memstr.h>
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#include <console/console.h>
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#include <interrupt.h>
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#include <console/kconsole.h>
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#include <security/cap.h>
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#include <lib/rd.h>
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#include <ipc/ipc.h>
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#ifdef CONFIG_SMP
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#include <smp/smp.h>
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#endif /* CONFIG_SMP */
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#include <synch/waitq.h>
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#include <synch/spinlock.h>
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/** Kernel initialization thread.
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 *
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 * kinit takes care of higher level kernel
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 * initialization (i.e. thread creation,
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 * userspace initialization etc.).
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 *
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 * @param arg Not used.
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 */
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void kinit(void *arg)
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{
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    thread_t *t;
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    /*
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     * Detach kinit as nobody will call thread_join_timeout() on it.
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     */
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    thread_detach(THREAD);
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    interrupts_disable();
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#ifdef CONFIG_SMP           
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    if (config.cpu_count > 1) {
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        waitq_initialize(&ap_completion_wq);
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        /*
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         * Create the kmp thread and wait for its completion.
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         * cpu1 through cpuN-1 will come up consecutively and
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         * not mess together with kcpulb threads.
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         * Just a beautification.
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         */
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        if ((t = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED,
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            "kmp", true))) {
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            spinlock_lock(&t->lock);
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            t->cpu = &cpus[0];
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            spinlock_unlock(&t->lock);
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            thread_ready(t);
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        } else
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            panic("thread_create/kmp\n");
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        thread_join(t);
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        thread_detach(t);
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    }
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#endif /* CONFIG_SMP */
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    /*
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     * Now that all CPUs are up, we can report what we've found.
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     */
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    cpu_list();
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#ifdef CONFIG_SMP
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    if (config.cpu_count > 1) {
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        count_t i;
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        /*
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         * For each CPU, create its load balancing thread.
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         */
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        for (i = 0; i < config.cpu_count; i++) {
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            if ((t = thread_create(kcpulb, NULL, TASK,
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                THREAD_FLAG_WIRED, "kcpulb", true))) {
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                spinlock_lock(&t->lock);           
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                t->cpu = &cpus[i];
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                spinlock_unlock(&t->lock);
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                thread_ready(t);
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            } else
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                panic("thread_create/kcpulb\n");
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        }
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    }
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#endif /* CONFIG_SMP */
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    /*
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     * At this point SMP, if present, is configured.
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     */
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    arch_post_smp_init();
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    /*
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     * Create kernel console.
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     */
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    t = thread_create(kconsole, (void *) "kconsole", TASK, 0, "kconsole", false);
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    if (t)
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        thread_ready(t);
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    else
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        panic("thread_create/kconsole\n");
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    interrupts_enable();
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    count_t i;
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    for (i = 0; i < init.cnt; i++) {
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        /*
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         * Run user tasks, load RAM disk images.
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         */
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        if (init.tasks[i].addr % FRAME_SIZE) {
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            printf("init[%d].addr is not frame aligned", i);
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            continue;
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        }
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        task_t *utask = task_run_program((void *) init.tasks[i].addr,
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            "uspace");
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        if (utask) {
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            /*
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             * Set capabilities to init userspace tasks.
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             */
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            cap_set(utask, CAP_CAP | CAP_MEM_MANAGER |
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                CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
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            if (!ipc_phone_0)
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                ipc_phone_0 = &utask->answerbox;
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        } else {
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            int rd = init_rd((rd_header *) init.tasks[i].addr,
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                init.tasks[i].size);
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            if (rd != RE_OK)
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                printf("Init binary %zd not used, error code %d.\n", i, rd);
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        }
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    }
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    if (!stdin) {
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        while (1) {
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            thread_sleep(1);
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            printf("kinit... ");
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        }
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    }
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}
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/** @}
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 */