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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. #define ALIVE_CHARS  4
  76.  
  77. #ifdef CONFIG_KCONSOLE
  78. static char alive[ALIVE_CHARS] = "-\\|/";
  79. #endif
  80.  
  81. /** Kernel initialization thread.
  82.  *
  83.  * kinit takes care of higher level kernel
  84.  * initialization (i.e. thread creation,
  85.  * userspace initialization etc.).
  86.  *
  87.  * @param arg Not used.
  88.  */
  89. void kinit(void *arg)
  90. {
  91.  
  92. #if defined(CONFIG_SMP) || defined(CONFIG_KCONSOLE)
  93.     thread_t *thread;
  94. #endif
  95.  
  96.     /*
  97.      * Detach kinit as nobody will call thread_join_timeout() on it.
  98.      */
  99.     thread_detach(THREAD);
  100.  
  101.     interrupts_disable();
  102.  
  103. #ifdef CONFIG_SMP          
  104.     if (config.cpu_count > 1) {
  105.         waitq_initialize(&ap_completion_wq);
  106.         /*
  107.          * Create the kmp thread and wait for its completion.
  108.          * cpu1 through cpuN-1 will come up consecutively and
  109.          * not mess together with kcpulb threads.
  110.          * Just a beautification.
  111.          */
  112.         thread = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED, "kmp", true);
  113.         if (thread != NULL) {
  114.             spinlock_lock(&thread->lock);
  115.             thread->cpu = &cpus[0];
  116.             spinlock_unlock(&thread->lock);
  117.             thread_ready(thread);
  118.         } else
  119.             panic("Unable to create kmp thread.");
  120.         thread_join(thread);
  121.         thread_detach(thread);
  122.     }
  123. #endif /* CONFIG_SMP */
  124.    
  125. #ifdef CONFIG_SMP
  126.     if (config.cpu_count > 1) {
  127.         count_t i;
  128.        
  129.         /*
  130.          * For each CPU, create its load balancing thread.
  131.          */
  132.         for (i = 0; i < config.cpu_count; i++) {
  133.             thread = thread_create(kcpulb, NULL, TASK, THREAD_FLAG_WIRED, "kcpulb", true);
  134.             if (thread != NULL) {
  135.                 spinlock_lock(&thread->lock);
  136.                 thread->cpu = &cpus[i];
  137.                 spinlock_unlock(&thread->lock);
  138.                 thread_ready(thread);
  139.             } else
  140.                 printf("Unable to create kcpulb thread for cpu" PRIc "\n", i);
  141.  
  142.         }
  143.     }
  144. #endif /* CONFIG_SMP */
  145.    
  146.     /*
  147.      * At this point SMP, if present, is configured.
  148.      */
  149.     arch_post_smp_init();
  150.  
  151. #ifdef CONFIG_KCONSOLE
  152.     if (stdin) {
  153.         /*
  154.          * Create kernel console.
  155.          */
  156.         thread = thread_create(kconsole_thread, NULL, TASK, 0, "kconsole", false);
  157.         if (thread != NULL)
  158.             thread_ready(thread);
  159.         else
  160.             printf("Unable to create kconsole thread\n");
  161.     }
  162. #endif /* CONFIG_KCONSOLE */
  163.    
  164.     interrupts_enable();
  165.    
  166.     /*
  167.      * Create user tasks, load RAM disk images.
  168.      */
  169.     count_t i;
  170.     program_t programs[CONFIG_INIT_TASKS];
  171.    
  172.     for (i = 0; i < init.cnt; i++) {
  173.         if (init.tasks[i].addr % FRAME_SIZE) {
  174.             printf("init[%" PRIc "].addr is not frame aligned\n", i);
  175.             continue;
  176.         }
  177.  
  178.         char *name = init.tasks[i].name;
  179.         if (name[0] == '\0') name = "init-bin";
  180.        
  181.         int rc = program_create_from_image((void *) init.tasks[i].addr,
  182.             name, &programs[i]);
  183.        
  184.         if ((rc == 0) && (programs[i].task != NULL)) {
  185.             /*
  186.              * Set capabilities to init userspace tasks.
  187.              */
  188.             cap_set(programs[i].task, CAP_CAP | CAP_MEM_MANAGER |
  189.                 CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
  190.            
  191.             if (!ipc_phone_0)
  192.                 ipc_phone_0 = &programs[i].task->answerbox;
  193.         } else if (rc == 0) {
  194.             /* It was the program loader and was registered */
  195.         } else {
  196.             /* RAM disk image */
  197.             int rd = init_rd((rd_header_t *) init.tasks[i].addr, init.tasks[i].size);
  198.            
  199.             if (rd != RE_OK)
  200.                 printf("Init binary %" PRIc " not used (error %d)\n", i, rd);
  201.         }
  202.     }
  203.    
  204.     /*
  205.      * Run user tasks with small delays
  206.      * to avoid intermixed klog output.
  207.      *
  208.      * TODO: This certainly does not guarantee
  209.      *       anything, it just works in most of the
  210.      *       cases. Some better way how to achieve
  211.      *       nice klog output should be found.
  212.      */
  213.     for (i = 0; i < init.cnt; i++) {
  214.         if (programs[i].task != NULL) {
  215.             program_ready(&programs[i]);
  216.             thread_usleep(10000);
  217.         }
  218.     }
  219.  
  220. #ifdef CONFIG_KCONSOLE
  221.     if (!stdin) {
  222.         thread_sleep(10);
  223.         printf("kinit: No stdin\nKernel alive: .");
  224.        
  225.         unsigned int i = 0;
  226.         while (true) {
  227.             printf("\b%c", alive[i % ALIVE_CHARS]);
  228.             thread_sleep(1);
  229.             i++;
  230.         }
  231.     }
  232. #endif /* CONFIG_KCONSOLE */
  233. }
  234.  
  235. /** @}
  236.  */
  237.