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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. #include <debug.h>
  68. #include <string.h>
  69.  
  70. #ifdef CONFIG_SMP
  71. #include <smp/smp.h>
  72. #endif /* CONFIG_SMP */
  73.  
  74. #include <synch/waitq.h>
  75. #include <synch/spinlock.h>
  76.  
  77. #define ALIVE_CHARS  4
  78.  
  79. #ifdef CONFIG_KCONSOLE
  80. static char alive[ALIVE_CHARS] = "-\\|/";
  81. #endif
  82.  
  83. #define INIT_PREFIX      "init:"
  84. #define INIT_PREFIX_LEN  5
  85.  
  86. /** Kernel initialization thread.
  87.  *
  88.  * kinit takes care of higher level kernel
  89.  * initialization (i.e. thread creation,
  90.  * userspace initialization etc.).
  91.  *
  92.  * @param arg Not used.
  93.  */
  94. void kinit(void *arg)
  95. {
  96.  
  97. #if defined(CONFIG_SMP) || defined(CONFIG_KCONSOLE)
  98.     thread_t *thread;
  99. #endif
  100.    
  101.     /*
  102.      * Detach kinit as nobody will call thread_join_timeout() on it.
  103.      */
  104.     thread_detach(THREAD);
  105.    
  106.     interrupts_disable();
  107.    
  108. #ifdef CONFIG_SMP
  109.     if (config.cpu_count > 1) {
  110.         waitq_initialize(&ap_completion_wq);
  111.         /*
  112.          * Create the kmp thread and wait for its completion.
  113.          * cpu1 through cpuN-1 will come up consecutively and
  114.          * not mess together with kcpulb threads.
  115.          * Just a beautification.
  116.          */
  117.         thread = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED, "kmp", true);
  118.         if (thread != NULL) {
  119.             spinlock_lock(&thread->lock);
  120.             thread->cpu = &cpus[0];
  121.             spinlock_unlock(&thread->lock);
  122.             thread_ready(thread);
  123.         } else
  124.             panic("Unable to create kmp thread.");
  125.         thread_join(thread);
  126.         thread_detach(thread);
  127.     }
  128.    
  129.     if (config.cpu_count > 1) {
  130.         count_t i;
  131.        
  132.         /*
  133.          * For each CPU, create its load balancing thread.
  134.          */
  135.         for (i = 0; i < config.cpu_count; i++) {
  136.             thread = thread_create(kcpulb, NULL, TASK, THREAD_FLAG_WIRED, "kcpulb", true);
  137.             if (thread != NULL) {
  138.                 spinlock_lock(&thread->lock);
  139.                 thread->cpu = &cpus[i];
  140.                 spinlock_unlock(&thread->lock);
  141.                 thread_ready(thread);
  142.             } else
  143.                 printf("Unable to create kcpulb thread for cpu" PRIc "\n", i);
  144.         }
  145.     }
  146. #endif /* CONFIG_SMP */
  147.    
  148.     /*
  149.      * At this point SMP, if present, is configured.
  150.      */
  151.     arch_post_smp_init();
  152.    
  153. #ifdef CONFIG_KCONSOLE
  154.     if (stdin) {
  155.         /*
  156.          * Create kernel console.
  157.          */
  158.         thread = thread_create(kconsole_thread, NULL, TASK, 0, "kconsole", false);
  159.         if (thread != NULL)
  160.             thread_ready(thread);
  161.         else
  162.             printf("Unable to create kconsole thread\n");
  163.     }
  164. #endif /* CONFIG_KCONSOLE */
  165.    
  166.     interrupts_enable();
  167.    
  168.     /*
  169.      * Create user tasks, load RAM disk images.
  170.      */
  171.     count_t i;
  172.     program_t programs[CONFIG_INIT_TASKS];
  173.    
  174.     for (i = 0; i < init.cnt; i++) {
  175.         if (init.tasks[i].addr % FRAME_SIZE) {
  176.             printf("init[%" PRIc "].addr is not frame aligned\n", i);
  177.             continue;
  178.         }
  179.        
  180.         /*
  181.          * Construct task name from the 'init:' prefix and the
  182.          * name stored in the init structure (if any).
  183.          */
  184.        
  185.         char namebuf[TASK_NAME_BUFLEN];
  186.         char *name;
  187.        
  188.         name = init.tasks[i].name;
  189.         if (name[0] == '\0')
  190.             name = "<unknown>";
  191.        
  192.         ASSERT(TASK_NAME_BUFLEN >= INIT_PREFIX_LEN);
  193.         strncpy(namebuf, INIT_PREFIX, TASK_NAME_BUFLEN);
  194.         strncpy(namebuf + INIT_PREFIX_LEN, name,
  195.             TASK_NAME_BUFLEN - INIT_PREFIX_LEN);
  196.        
  197.         int rc = program_create_from_image((void *) init.tasks[i].addr,
  198.             namebuf, &programs[i]);
  199.        
  200.         if ((rc == 0) && (programs[i].task != NULL)) {
  201.             /*
  202.              * Set capabilities to init userspace tasks.
  203.              */
  204.             cap_set(programs[i].task, CAP_CAP | CAP_MEM_MANAGER |
  205.                 CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
  206.            
  207.             if (!ipc_phone_0)
  208.                 ipc_phone_0 = &programs[i].task->answerbox;
  209.         } else if (rc == 0) {
  210.             /* It was the program loader and was registered */
  211.         } else {
  212.             /* RAM disk image */
  213.             int rd = init_rd((rd_header_t *) init.tasks[i].addr, init.tasks[i].size);
  214.            
  215.             if (rd != RE_OK)
  216.                 printf("Init binary %" PRIc " not used (error %d)\n", i, rd);
  217.         }
  218.     }
  219.    
  220.     /*
  221.      * Run user tasks with small delays
  222.      * to avoid intermixed klog output.
  223.      *
  224.      * TODO: This certainly does not guarantee
  225.      *       anything, it just works in most of the
  226.      *       cases. Some better way how to achieve
  227.      *       nice klog output should be found.
  228.      */
  229.     for (i = 0; i < init.cnt; i++) {
  230.         if (programs[i].task != NULL) {
  231.             program_ready(&programs[i]);
  232.             thread_usleep(10000);
  233.         }
  234.     }
  235.    
  236. #ifdef CONFIG_KCONSOLE
  237.     if (!stdin) {
  238.         thread_sleep(10);
  239.         printf("kinit: No stdin\nKernel alive: .");
  240.        
  241.         unsigned int i = 0;
  242.         while (true) {
  243.             printf("\b%c", alive[i % ALIVE_CHARS]);
  244.             thread_sleep(1);
  245.             i++;
  246.         }
  247.     }
  248. #endif /* CONFIG_KCONSOLE */
  249. }
  250.  
  251. /** @}
  252.  */
  253.