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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 main

 * @{

 */

/**

 * @file

 * @brief	Kernel initialization thread.

 *

 * This file contains kinit kernel thread which carries out

 * high level system initialization.

 *

 * This file is responsible for finishing SMP configuration

 * and creation of userspace init tasks.

 */

#include <main/kinit.h>

#include <config.h>

#include <arch.h>

#include <proc/scheduler.h>

#include <proc/task.h>

#include <proc/thread.h>

#include <panic.h>

#include <func.h>

#include <cpu.h>

#include <arch/asm.h>

#include <mm/page.h>

#include <arch/mm/page.h>

#include <mm/as.h>

#include <mm/frame.h>

#include <print.h>

#include <memstr.h>

#include <console/console.h>

#include <interrupt.h>

#include <console/kconsole.h>

#include <security/cap.h>

#include <lib/rd.h>

#include <ipc/ipc.h>

#ifdef CONFIG_SMP

#include <smp/smp.h>

#endif /* CONFIG_SMP */

#include <synch/waitq.h>

#include <synch/spinlock.h>

/** Kernel initialization thread.

 *

 * kinit takes care of higher level kernel

 * initialization (i.e. thread creation,

 * userspace initialization etc.).

 *

 * @param arg Not used.

 */

void kinit(void *arg)

{

	thread_t *t;

	/*

	 * Detach kinit as nobody will call thread_join_timeout() on it.

	 */

	thread_detach(THREAD);

	interrupts_disable();

#ifdef CONFIG_SMP		 	

	if (config.cpu_count > 1) {

		waitq_initialize(&ap_completion_wq);

		/*

		 * Create the kmp thread and wait for its completion.

		 * cpu1 through cpuN-1 will come up consecutively and

		 * not mess together with kcpulb threads.

		 * Just a beautification.

		 */

		if ((t = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED,

		    "kmp", true))) {

			spinlock_lock(&t->lock);

			t->cpu = &cpus[0];

			spinlock_unlock(&t->lock);

			thread_ready(t);

		} else

			panic("thread_create/kmp\n");

		thread_join(t);

		thread_detach(t);

	}

#endif /* CONFIG_SMP */

	/*

	 * Now that all CPUs are up, we can report what we've found.

	 */

	cpu_list();

#ifdef CONFIG_SMP

	if (config.cpu_count > 1) {

		count_t i;

		/*

		 * For each CPU, create its load balancing thread.

		 */

		for (i = 0; i < config.cpu_count; i++) {

			if ((t = thread_create(kcpulb, NULL, TASK,

			    THREAD_FLAG_WIRED, "kcpulb", true))) {

				spinlock_lock(&t->lock);			

				t->cpu = &cpus[i];

				spinlock_unlock(&t->lock);

				thread_ready(t);

			} else

				panic("thread_create/kcpulb\n");

		}

	}

#endif /* CONFIG_SMP */

	/*

	 * At this point SMP, if present, is configured.

	 */

	arch_post_smp_init();

	/*

	 * Create kernel console.

	 */

	t = thread_create(kconsole, (void *) "kconsole", TASK, 0, "kconsole",

	    false);

	if (t)

		thread_ready(t);

	else

		panic("thread_create/kconsole\n");

	interrupts_enable();

	/*

	 * Create user tasks, load RAM disk images.

	 */

	count_t i;

	thread_t *threads[CONFIG_INIT_TASKS];

	for (i = 0; i < init.cnt; i++) {

		if (init.tasks[i].addr % FRAME_SIZE) {

			printf("init[%" PRIc "].addr is not frame aligned", i);

			continue;

		}

		threads[i] = thread_create_program((void *) init.tasks[i].addr,

		    "uspace");

		if (threads[i] != NULL) {

			/*

			 * Set capabilities to init userspace tasks.

			 */

			cap_set(threads[i]->task, CAP_CAP | CAP_MEM_MANAGER |

			    CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);

			if (!ipc_phone_0)

				ipc_phone_0 = &threads[i]->task->answerbox;

		} else {

			int rd = init_rd((rd_header_t *) init.tasks[i].addr,

			    init.tasks[i].size);

			if (rd != RE_OK)

				printf("Init binary %" PRIc " not used, error "

				    "code %d.\n", i, rd);

		}

	}

	/*

	 * Run user tasks with reasonable delays

	 */

	for (i = 0; i < init.cnt; i++) {

		if (threads[i] != NULL) {

			thread_usleep(50000);

			thread_ready(threads[i]);

		}

	}

	if (!stdin) {

		while (1) {

			thread_sleep(1);

			printf("kinit... ");

		}

	}

}

/** @}

 */