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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup main
  30.  * @{
  31.  */
  32.  
  33. /**
  34.  * @file
  35.  * @brief   Kernel initialization thread.
  36.  *
  37.  * This file contains kinit kernel thread which carries out
  38.  * high level system initialization.
  39.  *
  40.  * This file is responsible for finishing SMP configuration
  41.  * and creation of userspace init tasks.
  42.  */
  43.  
  44. #include <main/kinit.h>
  45. #include <config.h>
  46. #include <arch.h>
  47. #include <proc/scheduler.h>
  48. #include <proc/task.h>
  49. #include <proc/thread.h>
  50. #include <panic.h>
  51. #include <func.h>
  52. #include <cpu.h>
  53. #include <arch/asm.h>
  54. #include <mm/page.h>
  55. #include <arch/mm/page.h>
  56. #include <mm/as.h>
  57. #include <mm/frame.h>
  58. #include <print.h>
  59. #include <memstr.h>
  60. #include <console/console.h>
  61. #include <interrupt.h>
  62. #include <console/kconsole.h>
  63. #include <security/cap.h>
  64.  
  65. #ifdef CONFIG_SMP
  66. #include <smp/smp.h>
  67. #endif /* CONFIG_SMP */
  68.  
  69. #include <synch/waitq.h>
  70. #include <synch/spinlock.h>
  71.  
  72. #ifdef CONFIG_TEST
  73. #include <test.h>
  74. #endif /* CONFIG_TEST */
  75.  
  76. /** Kernel initialization thread.
  77.  *
  78.  * kinit takes care of higher level kernel
  79.  * initialization (i.e. thread creation,
  80.  * userspace initialization etc.).
  81.  *
  82.  * @param arg Not used.
  83.  */
  84. void kinit(void *arg)
  85. {
  86.     thread_t *t;
  87.  
  88.     /*
  89.      * Detach kinit as nobody will call thread_join_timeout() on it.
  90.      */
  91.     thread_detach(THREAD);
  92.  
  93.     interrupts_disable();
  94.  
  95. #ifdef CONFIG_SMP          
  96.     if (config.cpu_count > 1) {
  97.         waitq_initialize(&ap_completion_wq);
  98.         /*
  99.          * Create the kmp thread and wait for its completion.
  100.          * cpu1 through cpuN-1 will come up consecutively and
  101.          * not mess together with kcpulb threads.
  102.          * Just a beautification.
  103.          */
  104.         if ((t = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED, "kmp"))) {
  105.             spinlock_lock(&t->lock);
  106.             t->cpu = &cpus[0];
  107.             spinlock_unlock(&t->lock);
  108.             thread_ready(t);
  109.         } else
  110.             panic("thread_create/kmp\n");
  111.         thread_join(t);
  112.         thread_detach(t);
  113.     }
  114. #endif /* CONFIG_SMP */
  115.     /*
  116.      * Now that all CPUs are up, we can report what we've found.
  117.      */
  118.     cpu_list();
  119.  
  120. #ifdef CONFIG_SMP
  121.     if (config.cpu_count > 1) {
  122.         int i;
  123.        
  124.         /*
  125.          * For each CPU, create its load balancing thread.
  126.          */
  127.         for (i = 0; i < config.cpu_count; i++) {
  128.  
  129.             if ((t = thread_create(kcpulb, NULL, TASK, THREAD_FLAG_WIRED, "kcpulb"))) {
  130.                 spinlock_lock(&t->lock);           
  131.                 t->cpu = &cpus[i];
  132.                 spinlock_unlock(&t->lock);
  133.                 thread_ready(t);
  134.             } else
  135.                 panic("thread_create/kcpulb\n");
  136.  
  137.         }
  138.     }
  139. #endif /* CONFIG_SMP */
  140.  
  141.     /*
  142.      * At this point SMP, if present, is configured.
  143.      */
  144.     arch_post_smp_init();
  145.  
  146.     /*
  147.      * Create kernel console.
  148.      */
  149.     if ((t = thread_create(kconsole, "kconsole", TASK, 0, "kconsole")))
  150.         thread_ready(t);
  151.     else
  152.         panic("thread_create/kconsole\n");
  153.  
  154.     interrupts_enable();
  155.  
  156. #ifdef CONFIG_TEST
  157.     test();
  158.     printf("\nTest finished, please reboot.\n");
  159. #else  /* CONFIG_TEST */
  160.  
  161.     task_t *utask;
  162.     count_t i;
  163.     for (i = 0; i < init.cnt; i++) {
  164.         /*
  165.          * Run user tasks.
  166.          */
  167.        
  168.         if (init.tasks[i].addr % FRAME_SIZE)
  169.             panic("init[%d].addr is not frame aligned", i);
  170.  
  171.         utask = task_run_program((void *) init.tasks[i].addr, "USPACE");
  172.         if (utask) {
  173.             /*
  174.              * Set capabilities to init userspace tasks.
  175.              */
  176.             cap_set(utask, CAP_CAP | CAP_MEM_MANAGER | CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
  177.            
  178.             if (!ipc_phone_0)
  179.                 ipc_phone_0 = &utask->answerbox;
  180.         } else
  181.             printf("Init task %zd not started.\n", i);
  182.     }
  183.  
  184.  
  185.     if (!stdin) {
  186.         while (1) {
  187.             thread_sleep(1);
  188.             printf("kinit... ");
  189.         }
  190.     }
  191. #endif /* CONFIG_TEST */
  192.  
  193. }
  194.  
  195. /** @}
  196.  */
  197.