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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.     thread_t *t;
  86.  
  87.     /*
  88.      * Detach kinit as nobody will call thread_join_timeout() on it.
  89.      */
  90.     thread_detach(THREAD);
  91.  
  92.     interrupts_disable();
  93.  
  94. #ifdef CONFIG_SMP          
  95.     if (config.cpu_count > 1) {
  96.         waitq_initialize(&ap_completion_wq);
  97.         /*
  98.          * Create the kmp thread and wait for its completion.
  99.          * cpu1 through cpuN-1 will come up consecutively and
  100.          * not mess together with kcpulb threads.
  101.          * Just a beautification.
  102.          */
  103.         if ((t = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED,
  104.             "kmp", true))) {
  105.             spinlock_lock(&t->lock);
  106.             t->cpu = &cpus[0];
  107.             spinlock_unlock(&t->lock);
  108.             thread_ready(t);
  109.         } else
  110.             panic("thread_create/kmp\n");
  111.         thread_join(t);
  112.         thread_detach(t);
  113.     }
  114. #endif /* CONFIG_SMP */
  115.     /*
  116.      * Now that all CPUs are up, we can report what we've found.
  117.      */
  118.     cpu_list();
  119.  
  120. #ifdef CONFIG_SMP
  121.     if (config.cpu_count > 1) {
  122.         count_t i;
  123.        
  124.         /*
  125.          * For each CPU, create its load balancing thread.
  126.          */
  127.         for (i = 0; i < config.cpu_count; i++) {
  128.  
  129.             if ((t = thread_create(kcpulb, NULL, TASK,
  130.                 THREAD_FLAG_WIRED, "kcpulb", true))) {
  131.                 spinlock_lock(&t->lock);           
  132.                 t->cpu = &cpus[i];
  133.                 spinlock_unlock(&t->lock);
  134.                 thread_ready(t);
  135.             } else
  136.                 panic("thread_create/kcpulb\n");
  137.  
  138.         }
  139.     }
  140. #endif /* CONFIG_SMP */
  141.  
  142.     /*
  143.      * At this point SMP, if present, is configured.
  144.      */
  145.     arch_post_smp_init();
  146.  
  147.     /*
  148.      * Create kernel console.
  149.      */
  150.     t = thread_create(kconsole, (void *) "kconsole", TASK, 0, "kconsole",
  151.         false);
  152.     if (t)
  153.         thread_ready(t);
  154.     else
  155.         panic("thread_create/kconsole\n");
  156.  
  157.     interrupts_enable();
  158.    
  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", i);
  168.             continue;
  169.         }
  170.  
  171.         int rc = program_create_from_image((void *) init.tasks[i].addr,
  172.             &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,
  188.                 init.tasks[i].size);
  189.            
  190.             if (rd != RE_OK)
  191.                 printf("Init binary %" PRIc " not used, error "
  192.                     "code %d.\n", i, rd);
  193.         }
  194.     }
  195.    
  196.     /*
  197.      * Run user tasks with reasonable delays
  198.      */
  199.     for (i = 0; i < init.cnt; i++) {
  200.         if (programs[i].task != NULL) {
  201.             thread_usleep(50000);
  202.             program_ready(&programs[i]);
  203.         }
  204.     }
  205.  
  206.     if (!stdin) {
  207.         while (1) {
  208.             thread_sleep(1);
  209.             printf("kinit... ");
  210.         }
  211.     }
  212. }
  213.  
  214. /** @}
  215.  */
  216.