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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 <arch/smp/mps.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.         /*
  98.          * Create the kmp thread and wait for its completion.
  99.          * cpu1 through cpuN-1 will come up consecutively and
  100.          * not mess together with kcpulb threads.
  101.          * Just a beautification.
  102.          */
  103.         if ((t = thread_create(kmp, NULL, TASK, 0, "kmp"))) {
  104.             spinlock_lock(&t->lock);
  105.             t->flags |= X_WIRED;
  106.             t->cpu = &cpus[0];
  107.             spinlock_unlock(&t->lock);
  108.             thread_ready(t);
  109.         }
  110.         else {
  111.             panic("thread_create/kmp\n");
  112.         }
  113.         thread_join(t);
  114.         thread_detach(t);
  115.     }
  116. #endif /* CONFIG_SMP */
  117.     /*
  118.      * Now that all CPUs are up, we can report what we've found.
  119.      */
  120.     cpu_list();
  121.  
  122. #ifdef CONFIG_SMP
  123.     if (config.cpu_count > 1) {
  124.         int i;
  125.        
  126.         /*
  127.          * For each CPU, create its load balancing thread.
  128.          */
  129.         for (i = 0; i < config.cpu_count; i++) {
  130.  
  131.             if ((t = thread_create(kcpulb, NULL, TASK, 0, "kcpulb"))) {
  132.                 spinlock_lock(&t->lock);           
  133.                 t->flags |= X_WIRED;
  134.                 t->cpu = &cpus[i];
  135.                 spinlock_unlock(&t->lock);
  136.                 thread_ready(t);
  137.             }
  138.             else panic("thread_create/kcpulb\n");
  139.  
  140.         }
  141.     }
  142. #endif /* CONFIG_SMP */
  143.  
  144.     /*
  145.      * At this point SMP, if present, is configured.
  146.      */
  147.     arch_post_smp_init();
  148.  
  149.     /*
  150.      * Create kernel console.
  151.      */
  152.     if ((t = thread_create(kconsole, "kconsole", TASK, 0, "kconsole")))
  153.         thread_ready(t);
  154.     else
  155.         panic("thread_create/kconsole\n");
  156.  
  157.     interrupts_enable();
  158.  
  159. #ifdef CONFIG_TEST
  160.     test();
  161.     printf("\nTest finished, please reboot\n");
  162. #else  /* CONFIG_TEST */
  163.  
  164.     task_t *utask;
  165.     count_t i;
  166.     for (i = 0; i < init.cnt; i++) {
  167.         /*
  168.          * Run user tasks.
  169.          */
  170.        
  171.         if (init.tasks[i].addr % FRAME_SIZE)
  172.             panic("init[%d].addr is not frame aligned", i);
  173.  
  174.         utask = task_run_program((void *) init.tasks[i].addr, "USPACE");
  175.         if (utask) {
  176.             /*
  177.              * Set capabilities to init userspace tasks.
  178.              */
  179.             cap_set(utask, CAP_CAP | CAP_MEM_MANAGER | CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
  180.            
  181.             if (!ipc_phone_0)
  182.                 ipc_phone_0 = &utask->answerbox;
  183.         } else
  184.             printf("Init task %zd not started.\n", i);
  185.     }
  186.  
  187.  
  188.     if (!stdin) {
  189.         while (1) {
  190.             thread_sleep(1);
  191.             printf("kinit... ");
  192.         }
  193.     }
  194. #endif /* CONFIG_TEST */
  195.  
  196. }
  197.  
  198.  /** @}
  199.  */
  200.  
  201.