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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. #include <main/kinit.h>
  30. #include <config.h>
  31. #include <arch.h>
  32. #include <proc/scheduler.h>
  33. #include <proc/task.h>
  34. #include <proc/thread.h>
  35. #include <panic.h>
  36. #include <func.h>
  37. #include <cpu.h>
  38. #include <arch/asm.h>
  39. #include <mm/page.h>
  40. #include <arch/mm/page.h>
  41. #include <mm/as.h>
  42. #include <mm/frame.h>
  43. #include <print.h>
  44. #include <memstr.h>
  45. #include <console/console.h>
  46. #include <interrupt.h>
  47. #include <console/kconsole.h>
  48.  
  49. #ifdef CONFIG_SMP
  50. #include <arch/smp/mps.h>
  51. #endif /* CONFIG_SMP */
  52.  
  53. #include <synch/waitq.h>
  54. #include <synch/spinlock.h>
  55.  
  56. #ifdef CONFIG_TEST
  57. #include <test.h>
  58. #endif /* CONFIG_TEST */
  59.  
  60. /** Kernel initialization thread.
  61.  *
  62.  * kinit takes care of higher level kernel
  63.  * initialization (i.e. thread creation,
  64.  * userspace initialization etc.).
  65.  *
  66.  * @param arg Not used.
  67.  */
  68. void kinit(void *arg)
  69. {
  70.     thread_t *t;
  71.     task_t *utask;
  72.  
  73.     interrupts_disable();
  74.  
  75. #ifdef CONFIG_SMP          
  76.     if (config.cpu_count > 1) {
  77.         /*
  78.          * Create the kmp thread and wait for its completion.
  79.          * cpu1 through cpuN-1 will come up consecutively and
  80.          * not mess together with kcpulb threads.
  81.          * Just a beautification.
  82.          */
  83.         if ((t = thread_create(kmp, NULL, TASK, 0))) {
  84.             spinlock_lock(&t->lock);
  85.             t->flags |= X_WIRED;
  86.             t->cpu = &cpus[0];
  87.             spinlock_unlock(&t->lock);
  88.             thread_ready(t);
  89.             waitq_sleep(&kmp_completion_wq);
  90.         }
  91.         else panic("thread_create/kmp\n");
  92.     }
  93. #endif /* CONFIG_SMP */
  94.     /*
  95.      * Now that all CPUs are up, we can report what we've found.
  96.      */
  97.     cpu_list();
  98.  
  99. #ifdef CONFIG_SMP
  100.     if (config.cpu_count > 1) {
  101.         int i;
  102.        
  103.         /*
  104.          * For each CPU, create its load balancing thread.
  105.          */
  106.         for (i = 0; i < config.cpu_count; i++) {
  107.  
  108.             if ((t = thread_create(kcpulb, NULL, TASK, 0))) {
  109.                 spinlock_lock(&t->lock);           
  110.                 t->flags |= X_WIRED;
  111.                 t->cpu = &cpus[i];
  112.                 spinlock_unlock(&t->lock);
  113.                 thread_ready(t);
  114.             }
  115.             else panic("thread_create/kcpulb\n");
  116.  
  117.         }
  118.     }
  119. #endif /* CONFIG_SMP */
  120.  
  121.     /*
  122.      * At this point SMP, if present, is configured.
  123.      */
  124.     arch_post_smp_init();
  125.  
  126.     /*
  127.      * Create kernel console.
  128.      */
  129.     if ((t = thread_create(kconsole, "kconsole", TASK, 0)))
  130.         thread_ready(t);
  131.     else
  132.         panic("thread_create/kconsole\n");
  133.  
  134.     interrupts_enable();
  135.  
  136.     if (config.init_size > 0) {
  137.         /*
  138.          * Create the first user task.
  139.          */
  140.        
  141.         if (config.init_addr % FRAME_SIZE)
  142.             panic("config.init_addr is not frame aligned");
  143.  
  144.         utask = task_run_program((void *)config.init_addr);
  145.         if (utask)
  146.             ipc_phone_0 = &utask->answerbox;
  147.         else
  148.             printf("Userspace not started.\n");
  149.     }
  150.  
  151. #ifdef CONFIG_TEST
  152.     test();
  153. #endif /* CONFIG_TEST */
  154.  
  155.     if (!stdin) {
  156.         while (1) {
  157.             thread_sleep(1);
  158.             printf("kinit... ");
  159.         }
  160.     }
  161.  
  162. }
  163.