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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.  
  66. #ifdef CONFIG_SMP
  67. #include <smp/smp.h>
  68. #endif /* CONFIG_SMP */
  69.  
  70. #include <synch/waitq.h>
  71. #include <synch/spinlock.h>
  72.  
  73. /** Kernel initialization thread.
  74.  *
  75.  * kinit takes care of higher level kernel
  76.  * initialization (i.e. thread creation,
  77.  * userspace initialization etc.).
  78.  *
  79.  * @param arg Not used.
  80.  */
  81. void kinit(void *arg)
  82. {
  83.     thread_t *t;
  84.  
  85.     /*
  86.      * Detach kinit as nobody will call thread_join_timeout() on it.
  87.      */
  88.     thread_detach(THREAD);
  89.  
  90.     interrupts_disable();
  91.  
  92. #ifdef CONFIG_SMP          
  93.     if (config.cpu_count > 1) {
  94.         waitq_initialize(&ap_completion_wq);
  95.         /*
  96.          * Create the kmp thread and wait for its completion.
  97.          * cpu1 through cpuN-1 will come up consecutively and
  98.          * not mess together with kcpulb threads.
  99.          * Just a beautification.
  100.          */
  101.         if ((t = thread_create(kmp, NULL, TASK, THREAD_FLAG_WIRED, "kmp"))) {
  102.             spinlock_lock(&t->lock);
  103.             t->cpu = &cpus[0];
  104.             spinlock_unlock(&t->lock);
  105.             thread_ready(t);
  106.         } else
  107.             panic("thread_create/kmp\n");
  108.         thread_join(t);
  109.         thread_detach(t);
  110.     }
  111. #endif /* CONFIG_SMP */
  112.     /*
  113.      * Now that all CPUs are up, we can report what we've found.
  114.      */
  115.     cpu_list();
  116.  
  117. #ifdef CONFIG_SMP
  118.     if (config.cpu_count > 1) {
  119.         int i;
  120.        
  121.         /*
  122.          * For each CPU, create its load balancing thread.
  123.          */
  124.         for (i = 0; i < config.cpu_count; i++) {
  125.  
  126.             if ((t = thread_create(kcpulb, NULL, TASK, THREAD_FLAG_WIRED, "kcpulb"))) {
  127.                 spinlock_lock(&t->lock);           
  128.                 t->cpu = &cpus[i];
  129.                 spinlock_unlock(&t->lock);
  130.                 thread_ready(t);
  131.             } else
  132.                 panic("thread_create/kcpulb\n");
  133.  
  134.         }
  135.     }
  136. #endif /* CONFIG_SMP */
  137.  
  138.     /*
  139.      * At this point SMP, if present, is configured.
  140.      */
  141.     arch_post_smp_init();
  142.  
  143.     /*
  144.      * Create kernel console.
  145.      */
  146.     if ((t = thread_create(kconsole, "kconsole", TASK, 0, "kconsole")))
  147.         thread_ready(t);
  148.     else
  149.         panic("thread_create/kconsole\n");
  150.  
  151.     interrupts_enable();
  152.  
  153.     count_t i;
  154.     for (i = 0; i < init.cnt; i++) {
  155.         /*
  156.          * Run user tasks, load RAM disk images.
  157.          */
  158.        
  159.         if (init.tasks[i].addr % FRAME_SIZE) {
  160.             printf("init[%d].addr is not frame aligned", i);
  161.             continue;
  162.         }
  163.  
  164.         task_t *utask = task_run_program((void *) init.tasks[i].addr, "USPACE");
  165.         if (utask) {
  166.             /*
  167.              * Set capabilities to init userspace tasks.
  168.              */
  169.             cap_set(utask, CAP_CAP | CAP_MEM_MANAGER | CAP_IO_MANAGER | CAP_PREEMPT_CONTROL | CAP_IRQ_REG);
  170.            
  171.             if (!ipc_phone_0)
  172.                 ipc_phone_0 = &utask->answerbox;
  173.         } else {
  174.             int rd = init_rd((rd_header *) init.tasks[i].addr, init.tasks[i].size);
  175.            
  176.             if (rd != RE_OK)
  177.                 printf("Init binary %zd not used.\n", i);
  178.         }
  179.     }
  180.  
  181.  
  182.     if (!stdin) {
  183.         while (1) {
  184.             thread_sleep(1);
  185.             printf("kinit... ");
  186.         }
  187.     }
  188. }
  189.  
  190. /** @}
  191.  */
  192.