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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 <proc/program.h>
  51. #include <panic.h>
  52. #include <func.h>
  53. #include <cpu.h>
  54. #include <arch/asm.h>
  55. #include <mm/page.h>
  56. #include <arch/mm/page.h>
  57. #include <mm/as.h>
  58. #include <mm/frame.h>
  59. #include <print.h>
  60. #include <memstr.h>
  61. #include <console/console.h>
  62. #include <interrupt.h>
  63. #include <console/kconsole.h>
  64. #include <security/cap.h>
  65. #include <lib/rd.h>
  66. #include <ipc/ipc.h>
  67.  
  68. #ifdef CONFIG_SMP
  69. #include <smp/smp.h>
  70. #endif /* CONFIG_SMP */
  71.  
  72. #include <synch/waitq.h>
  73. #include <synch/spinlock.h>
  74.  
  75. /** Kernel initialization thread.
  76.  *
  77.  * kinit takes care of higher level kernel
  78.  * initialization (i.e. thread creation,
  79.  * userspace initialization etc.).
  80.  *
  81.  * @param arg Not used.
  82.  */
  83. void kinit(void *arg)
  84. {
  85.  
  86. #if defined(CONFIG_SMP) || defined(CONFIG_KCONSOLE)
  87.     thread_t *thread;
  88. #endif
  89.  
  90.     /*
  91.      * Detach kinit as nobody will call thread_join_timeout() on it.
  92.      */
  93.     thread_detach(THREAD);
  94.  
  95.     interrupts_disable();
  96.  
  97. #ifdef CONFIG_SMP          
  98.     if (config.cpu_count > 1) {
  99.         waitq_initialize(&ap_completion_wq);
  100.         /*
  101.          * Create the kmp thread and wait for its completion.
  102.          * cpu1 through cpuN-1 will come up consecutively and
  103.          * not mess together with kcpulb threads.
  104.          * Just a beautification.
  105.          */
  106.         thread = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED, "kmp", true);
  107.         if (thread != NULL) {
  108.             spinlock_lock(&thread->lock);
  109.             thread->cpu = &cpus[0];
  110.             spinlock_unlock(&thread->lock);
  111.             thread_ready(thread);
  112.         } else
  113.             panic("Unable to create kmp thread\n");
  114.         thread_join(thread);
  115.         thread_detach(thread);
  116.     }
  117. #endif /* CONFIG_SMP */
  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.             thread = thread_create(kcpulb, NULL, TASK, THREAD_FLAG_WIRED, "kcpulb", true);
  128.             if (thread != NULL) {
  129.                 spinlock_lock(&thread->lock);
  130.                 thread->cpu = &cpus[i];
  131.                 spinlock_unlock(&thread->lock);
  132.                 thread_ready(thread);
  133.             } else
  134.                 printf("Unable to create kcpulb thread for cpu" PRIc "\n", i);
  135.  
  136.         }
  137.     }
  138. #endif /* CONFIG_SMP */
  139.    
  140.     /*
  141.      * At this point SMP, if present, is configured.
  142.      */
  143.     arch_post_smp_init();
  144.  
  145. #ifdef CONFIG_KCONSOLE
  146.     if (stdin) {
  147.         /*
  148.          * Create kernel console.
  149.          */
  150.         thread = thread_create(kconsole_thread, NULL, TASK, 0, "kconsole", false);
  151.         if (thread != NULL)
  152.             thread_ready(thread);
  153.         else
  154.             printf("Unable to create kconsole thread\n");
  155.     }
  156. #endif /* CONFIG_KCONSOLE */
  157.    
  158.     interrupts_enable();
  159.     /*
  160.      * Create user tasks, load RAM disk images.
  161.      */
  162.     count_t i;
  163.     program_t programs[CONFIG_INIT_TASKS];
  164.    
  165.     for (i = 0; i < init.cnt; i++) {
  166.         if (init.tasks[i].addr % FRAME_SIZE) {
  167.             printf("init[%" PRIc "].addr is not frame aligned\n", i);
  168.             continue;
  169.         }
  170.        
  171.         int rc = program_create_from_image((void *) init.tasks[i].addr,
  172.             "init-bin", &programs[i]);
  173.        
  174.         if ((rc == 0) && (programs[i].task != NULL)) {
  175.             /*
  176.              * Set capabilities to init userspace tasks.
  177.              */
  178.             cap_set(programs[i].task, CAP_CAP | CAP_MEM_MANAGER |
  179.                 CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
  180.            
  181.             if (!ipc_phone_0)
  182.                 ipc_phone_0 = &programs[i].task->answerbox;
  183.         } else if (rc == 0) {
  184.             /* It was the program loader and was registered */
  185.         } else {
  186.             /* RAM disk image */
  187.             int rd = init_rd((rd_header_t *) init.tasks[i].addr, init.tasks[i].size);
  188.            
  189.             if (rd != RE_OK)
  190.                 printf("Init binary %" PRIc " not used (error %d)\n", i, rd);
  191.         }
  192.     }
  193.  
  194.     /*
  195.      * Run user tasks with reasonable delays
  196.      */
  197.     for (i = 0; i < init.cnt; i++) {
  198.         if (programs[i].task != NULL) {
  199.             thread_usleep(50000);
  200.             program_ready(&programs[i]);
  201.         }
  202.     }
  203.  
  204. #ifdef CONFIG_KCONSOLE
  205.     if (!stdin) {
  206.         printf("kinit: No stdin\nKernel alive: ");
  207.        
  208.         uint64_t i = 0;
  209.         while (1) {
  210.             printf(PRIu64 " ", i);
  211.             thread_sleep(1);
  212.             i++;
  213.         }
  214.     }
  215. #endif /* CONFIG_KCONSOLE */
  216. }
  217.  
  218. /** @}
  219.  */
  220.