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1 jermar 1
/*
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 * 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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#include <main/kinit.h>
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#include <main/uinit.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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458 decky 50
#ifdef CONFIG_SMP
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#include <arch/smp/mps.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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#ifdef CONFIG_TEST
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#include <test.h>
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#endif /* CONFIG_TEST */
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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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    as_t *as;
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    as_area_t *a;
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    index_t frame, frames;
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    index_t pfn;
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    task_t *u;
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    interrupts_disable();
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458 decky 80
#ifdef CONFIG_SMP           
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    if (config.cpu_count > 1) {
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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
430 jermar 85
         * 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, 0))) {
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            spinlock_lock(&t->lock);
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            t->flags |= X_WIRED;
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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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            waitq_sleep(&kmp_completion_wq);
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        }
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        else panic("thread_create/kmp\n");
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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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     */
673 jermar 102
    cpu_list();
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458 decky 104
#ifdef CONFIG_SMP
1 jermar 105
    if (config.cpu_count > 1) {
673 jermar 106
        int i;
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125 jermar 108
        /*
1 jermar 109
         * 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, 0))) {
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                spinlock_lock(&t->lock);           
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                t->flags |= X_WIRED;
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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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            }
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            else panic("thread_create/kcpulb\n");
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        }
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    }
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#endif /* CONFIG_SMP */
1 jermar 125
 
510 jermar 126
    /*
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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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    /*
510 jermar 132
     * Create kernel console.
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     */
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    if ((t = thread_create(kconsole, "kconsole", TASK, 0)))
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        thread_ready(t);
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    else
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        panic("thread_create/kconsole\n");
510 jermar 138
 
413 jermar 139
    interrupts_enable();
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    if (config.init_size > 0) {
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        /*
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         * Create the first user task.
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         */
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        if (KA2PA(config.init_addr) % FRAME_SIZE)
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            panic("config.init_addr is not frame aligned");
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        as = as_create(NULL);
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        if (!as)
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            panic("as_create\n");
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        u = task_create(as);
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        if (!u)
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            panic("task_create\n");
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        t = thread_create(uinit, NULL, u, THREAD_USER_STACK);
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        if (!t)
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            panic("thread_create\n");
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        /*
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         * Create the text as_area and copy the userspace code there.
718 decky 161
         */
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        frame = KA2PA(config.init_addr) / FRAME_SIZE;
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        frames = config.init_size / FRAME_SIZE;
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        if (config.init_size % FRAME_SIZE > 0)
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            frames++;
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        a = as_area_create(as, AS_AREA_TEXT, frames, UTEXT_ADDRESS);
717 decky 169
        if (!a)
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            panic("as_area_create: text\n");
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718 decky 172
        for (pfn = 0; pfn < frames; pfn++)
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            as_area_set_mapping(a, pfn, frame + pfn);
703 jermar 174
 
717 decky 175
        /*
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         * Create the data as_area.
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         */
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        a = as_area_create(as, AS_AREA_STACK, 1, USTACK_ADDRESS);
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        if (!a)
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            panic("as_area_create: stack\n");
1 jermar 181
 
717 decky 182
        thread_ready(t);
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    }
1 jermar 184
 
459 decky 185
#ifdef CONFIG_TEST
1 jermar 186
    test();
459 decky 187
#endif /* CONFIG_TEST */
1 jermar 188
 
517 jermar 189
    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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        }
1 jermar 194
    }
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}