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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. /**
  30.  * @file    kinit.c
  31.  * @brief   Kernel initialization thread.
  32.  *
  33.  * This file contains kinit kernel thread which carries out
  34.  * high level system initialization.
  35.  *
  36.  * This file is responsible for finishing SMP configuration
  37.  * and creation of userspace init tasks.
  38.  */
  39.  
  40. #include <main/kinit.h>
  41. #include <config.h>
  42. #include <arch.h>
  43. #include <proc/scheduler.h>
  44. #include <proc/task.h>
  45. #include <proc/thread.h>
  46. #include <panic.h>
  47. #include <func.h>
  48. #include <cpu.h>
  49. #include <arch/asm.h>
  50. #include <mm/page.h>
  51. #include <arch/mm/page.h>
  52. #include <mm/as.h>
  53. #include <mm/frame.h>
  54. #include <print.h>
  55. #include <memstr.h>
  56. #include <console/console.h>
  57. #include <interrupt.h>
  58. #include <console/kconsole.h>
  59. #include <security/cap.h>
  60.  
  61. #ifdef CONFIG_SMP
  62. #include <arch/smp/mps.h>
  63. #endif /* CONFIG_SMP */
  64.  
  65. #include <synch/waitq.h>
  66. #include <synch/spinlock.h>
  67.  
  68. #ifdef CONFIG_TEST
  69. #include <test.h>
  70. #endif /* CONFIG_TEST */
  71.  
  72. /** Kernel initialization thread.
  73.  *
  74.  * kinit takes care of higher level kernel
  75.  * initialization (i.e. thread creation,
  76.  * userspace initialization etc.).
  77.  *
  78.  * @param arg Not used.
  79.  */
  80. void kinit(void *arg)
  81. {
  82.     thread_t *t;
  83.     task_t *utask;
  84.  
  85.     /*
  86.      * Detach kinit as nobody will call thread_join_timeout() on it.
  87.      */
  88.     thread_detach(THREAD);
  89.  
  90.     interrupts_disable();
  91.  
  92. #ifdef CONFIG_SMP          
  93.     if (config.cpu_count > 1) {
  94.         /*
  95.          * Create the kmp thread and wait for its completion.
  96.          * cpu1 through cpuN-1 will come up consecutively and
  97.          * not mess together with kcpulb threads.
  98.          * Just a beautification.
  99.          */
  100.         if ((t = thread_create(kmp, NULL, TASK, 0, "kmp"))) {
  101.             spinlock_lock(&t->lock);
  102.             t->flags |= X_WIRED;
  103.             t->cpu = &cpus[0];
  104.             spinlock_unlock(&t->lock);
  105.             thread_ready(t);
  106.         }
  107.         else {
  108.             panic("thread_create/kmp\n");
  109.         }
  110.         thread_join(t);
  111.         thread_detach(t);
  112.     }
  113. #endif /* CONFIG_SMP */
  114.     /*
  115.      * Now that all CPUs are up, we can report what we've found.
  116.      */
  117.     cpu_list();
  118.  
  119. #ifdef CONFIG_SMP
  120.     if (config.cpu_count > 1) {
  121.         int i;
  122.        
  123.         /*
  124.          * For each CPU, create its load balancing thread.
  125.          */
  126.         for (i = 0; i < config.cpu_count; i++) {
  127.  
  128.             if ((t = thread_create(kcpulb, NULL, TASK, 0, "kcpulb"))) {
  129.                 spinlock_lock(&t->lock);           
  130.                 t->flags |= X_WIRED;
  131.                 t->cpu = &cpus[i];
  132.                 spinlock_unlock(&t->lock);
  133.                 thread_ready(t);
  134.             }
  135.             else 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.     count_t i;
  157.     for (i = 0; i < init.cnt; i++) {
  158.         /*
  159.          * Run user tasks.
  160.          */
  161.        
  162.         if (init.tasks[i].addr % FRAME_SIZE)
  163.             panic("init[%d].addr is not frame aligned", i);
  164.  
  165.         utask = task_run_program((void *) init.tasks[i].addr, "USPACE");
  166.         if (utask) {
  167.             /*
  168.              * Set capabilities to init userspace tasks.
  169.              */
  170.             cap_set(utask, CAP_CAP | CAP_MEM_MANAGER | CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
  171.            
  172.             if (!ipc_phone_0)
  173.                 ipc_phone_0 = &utask->answerbox;
  174.         } else
  175.             printf("Init task %zd not started.\n", i);
  176.     }
  177.  
  178. #ifdef CONFIG_TEST
  179.     test();
  180. #endif /* CONFIG_TEST */
  181.  
  182.     if (!stdin) {
  183.         while (1) {
  184.             thread_sleep(1);
  185.             printf("kinit... ");
  186.         }
  187.     }
  188.  
  189. }
  190.