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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 <main/uinit.h>
  31. #include <config.h>
  32. #include <arch.h>
  33. #include <proc/scheduler.h>
  34. #include <proc/task.h>
  35. #include <proc/thread.h>
  36. #include <panic.h>
  37. #include <func.h>
  38. #include <cpu.h>
  39. #include <arch/asm.h>
  40. #include <mm/page.h>
  41. #include <arch/mm/page.h>
  42. #include <mm/vm.h>
  43. #include <mm/frame.h>
  44. #include <print.h>
  45. #include <memstr.h>
  46. #include <console/console.h>
  47. #include <interrupt.h>
  48. #include <console/kconsole.h>
  49.  
  50. #ifdef CONFIG_SMP
  51. #include <arch/smp/mps.h>
  52. #endif /* CONFIG_SMP */
  53.  
  54. #include <synch/waitq.h>
  55. #include <synch/spinlock.h>
  56.  
  57. #ifdef CONFIG_TEST
  58. #include <test.h>
  59. #endif /* CONFIG_TEST */
  60.  
  61. /** Kernel initialization thread.
  62.  *
  63.  * kinit takes care of higher level kernel
  64.  * initialization (i.e. thread creation,
  65.  * userspace initialization etc.).
  66.  *
  67.  * @param arg Not used.
  68.  */
  69. void kinit(void *arg)
  70. {
  71.     vm_t *m;
  72.     vm_area_t *a;
  73.     task_t *u;
  74.     thread_t *t;
  75.     int i;
  76.  
  77.     interrupts_disable();
  78.  
  79. #ifdef CONFIG_SMP          
  80.     if (config.cpu_count > 1) {
  81.         /*
  82.          * Create the kmp thread and wait for its completion.
  83.          * cpu1 through cpuN-1 will come up consecutively and
  84.          * not mess together with kcpulb threads.
  85.          * Just a beautification.
  86.          */
  87.         if ((t = thread_create(kmp, NULL, TASK, 0))) {
  88.             spinlock_lock(&t->lock);
  89.             t->flags |= X_WIRED;
  90.             t->cpu = &cpus[0];
  91.             spinlock_unlock(&t->lock);
  92.             thread_ready(t);
  93.             waitq_sleep(&kmp_completion_wq);
  94.         }
  95.         else panic("thread_create/kmp\n");
  96.     }
  97. #endif /* CONFIG_SMP */
  98.     /*
  99.      * Now that all CPUs are up, we can report what we've found.
  100.      */
  101.     for (i = 0; i < config.cpu_count; i++) {
  102.         if (cpus[i].active)
  103.             cpu_print_report(&cpus[i]);
  104.         else
  105.             printf("cpu%d: not active\n", i);
  106.     }
  107.  
  108. #ifdef CONFIG_SMP
  109.     if (config.cpu_count > 1) {
  110.         /*
  111.          * For each CPU, create its load balancing thread.
  112.          */
  113.         for (i = 0; i < config.cpu_count; i++) {
  114.  
  115.             if ((t = thread_create(kcpulb, NULL, TASK, 0))) {
  116.                 spinlock_lock(&t->lock);           
  117.                 t->flags |= X_WIRED;
  118.                 t->cpu = &cpus[i];
  119.                 spinlock_unlock(&t->lock);
  120.                 thread_ready(t);
  121.             }
  122.             else panic("thread_create/kcpulb\n");
  123.  
  124.         }
  125.     }
  126. #endif /* CONFIG_SMP */
  127.  
  128.     /*
  129.      * At this point SMP, if present, is configured.
  130.      */
  131.     arch_post_smp_init();
  132.  
  133.     /*
  134.      * Create kernel console.
  135.      */
  136.     if ((t = thread_create(kconsole, "kconsole", TASK, 0)))
  137.         thread_ready(t);
  138.     else panic("thread_create/kconsole\n");
  139.  
  140.     interrupts_enable();
  141.  
  142. #ifdef CONFIG_USERSPACE
  143.     /*
  144.      * Create the first user task.
  145.      */
  146.     m = vm_create(NULL);
  147.     if (!m)
  148.         panic("vm_create\n");
  149.     u = task_create(m);
  150.     if (!u)
  151.         panic("task_create\n");
  152.     t = thread_create(uinit, NULL, u, THREAD_USER_STACK);
  153.     if (!t)
  154.         panic("thread_create\n");
  155.  
  156.     /*
  157.      * Create the text vm_area and copy the userspace code there.
  158.      */
  159.     a = vm_area_create(m, VMA_TEXT, 1, UTEXT_ADDRESS);
  160.     if (!a)
  161.         panic("vm_area_create: vm_text\n");
  162.     vm_area_map(a, m);
  163.     memcpy((void *) PA2KA(a->mapping[0]), (void *) utext, utext_size < PAGE_SIZE ? utext_size : PAGE_SIZE);
  164.  
  165.     /*
  166.      * Create the data vm_area.
  167.      */
  168.     a = vm_area_create(m, VMA_STACK, 1, USTACK_ADDRESS);
  169.     if (!a)
  170.         panic("vm_area_create: vm_stack\n");
  171.     vm_area_map(a, m); 
  172.    
  173.     thread_ready(t);
  174. #endif /* CONFIG_USERSPACE */
  175.  
  176. #ifdef CONFIG_TEST
  177.     test();
  178. #endif /* CONFIG_TEST */
  179.  
  180.     if (!stdin) {
  181.         while (1) {
  182.             thread_sleep(1);
  183.             printf("kinit... ");
  184.         }
  185.     }
  186.  
  187. }
  188.