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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. #include <lib/rd.h>
  65. #include <ipc/ipc.h>
  66.  
  67. #ifdef CONFIG_SMP
  68. #include <smp/smp.h>
  69. #endif /* CONFIG_SMP */
  70.  
  71. #include <synch/waitq.h>
  72. #include <synch/spinlock.h>
  73.  
  74. /** Kernel initialization thread.
  75.  *
  76.  * kinit takes care of higher level kernel
  77.  * initialization (i.e. thread creation,
  78.  * userspace initialization etc.).
  79.  *
  80.  * @param arg Not used.
  81.  */
  82. void kinit(void *arg)
  83. {
  84.     thread_t *t;
  85.  
  86.     /*
  87.      * Detach kinit as nobody will call thread_join_timeout() on it.
  88.      */
  89.     thread_detach(THREAD);
  90.  
  91.     interrupts_disable();
  92.  
  93. #ifdef CONFIG_SMP          
  94.     if (config.cpu_count > 1) {
  95.         waitq_initialize(&ap_completion_wq);
  96.         /*
  97.          * Create the kmp thread and wait for its completion.
  98.          * cpu1 through cpuN-1 will come up consecutively and
  99.          * not mess together with kcpulb threads.
  100.          * Just a beautification.
  101.          */
  102.         if ((t = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED,
  103.             "kmp", true))) {
  104.             spinlock_lock(&t->lock);
  105.             t->cpu = &cpus[0];
  106.             spinlock_unlock(&t->lock);
  107.             thread_ready(t);
  108.         } else
  109.             panic("thread_create/kmp\n");
  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.         count_t 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,
  129.                 THREAD_FLAG_WIRED, "kcpulb", true))) {
  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.     t = thread_create(kconsole, (void *) "kconsole", TASK, 0, "kconsole", false);
  150.     if (t)
  151.         thread_ready(t);
  152.     else
  153.         panic("thread_create/kconsole\n");
  154.  
  155.     interrupts_enable();
  156.  
  157.     count_t i;
  158.     for (i = 0; i < init.cnt; i++) {
  159.         /*
  160.          * Run user tasks, load RAM disk images.
  161.          */
  162.        
  163.         if (init.tasks[i].addr % FRAME_SIZE) {
  164.             printf("init[%d].addr is not frame aligned", i);
  165.             continue;
  166.         }
  167.  
  168.         task_t *utask = task_run_program((void *) init.tasks[i].addr,
  169.             "uspace");
  170.         if (utask) {
  171.             /*
  172.              * Set capabilities to init userspace tasks.
  173.              */
  174.             cap_set(utask, CAP_CAP | CAP_MEM_MANAGER |
  175.                 CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
  176.            
  177.             if (!ipc_phone_0)
  178.                 ipc_phone_0 = &utask->answerbox;
  179.         } else {
  180.             int rd = init_rd((rd_header *) init.tasks[i].addr,
  181.                 init.tasks[i].size);
  182.            
  183.             if (rd != RE_OK)
  184.                 printf("Init binary %zd not used.\n", i);
  185.         }
  186.     }
  187.  
  188.  
  189.     if (!stdin) {
  190.         while (1) {
  191.             thread_sleep(1);
  192.             printf("kinit... ");
  193.         }
  194.     }
  195. }
  196.  
  197. /** @}
  198.  */
  199.