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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 <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.     vm_t *m;
  71.     vm_area_t *a;
  72.     task_t *u;
  73.     thread_t *t;
  74.     int i;
  75.  
  76.     interrupts_disable();
  77.  
  78. #ifdef CONFIG_SMP          
  79.     if (config.cpu_count > 1) {
  80.         /*
  81.          * Create the kmp thread and wait for its completion.
  82.          * cpu1 through cpuN-1 will come up consecutively and
  83.          * not mess together with kcpulb threads.
  84.          * Just a beautification.
  85.          */
  86.         if (t = thread_create(kmp, NULL, TASK, 0)) {
  87.             spinlock_lock(&t->lock);
  88.             t->flags |= X_WIRED;
  89.             t->cpu = &cpus[0];
  90.             spinlock_unlock(&t->lock);
  91.             thread_ready(t);
  92.             waitq_sleep(&kmp_completion_wq);
  93.         }
  94.         else panic("thread_create/kmp\n");
  95.     }
  96. #endif /* CONFIG_SMP */
  97.     /*
  98.      * Now that all CPUs are up, we can report what we've found.
  99.      */
  100.     for (i = 0; i < config.cpu_count; i++) {
  101.         if (cpus[i].active)
  102.             cpu_print_report(&cpus[i]);
  103.         else
  104.             printf("cpu%d: not active\n", i);
  105.     }
  106.  
  107. #ifdef CONFIG_SMP
  108.     if (config.cpu_count > 1) {
  109.         /*
  110.          * For each CPU, create its load balancing thread.
  111.          */
  112.         for (i = 0; i < config.cpu_count; i++) {
  113.  
  114.             if (t = thread_create(kcpulb, NULL, TASK, 0)) {
  115.                 spinlock_lock(&t->lock);           
  116.                 t->flags |= X_WIRED;
  117.                 t->cpu = &cpus[i];
  118.                 spinlock_unlock(&t->lock);
  119.                 thread_ready(t);
  120.             }
  121.             else panic("thread_create/kcpulb\n");
  122.  
  123.         }
  124.     }
  125. #endif /* CONFIG_SMP */
  126.  
  127.     /*
  128.      * At this point SMP, if present, is configured.
  129.      */
  130.     arch_post_smp_init();
  131.  
  132.     /*
  133.      * Create kernel console.
  134.      */
  135.     if (t = thread_create(kconsole, NULL, TASK, 0))
  136.         thread_ready(t);
  137.     else panic("thread_create/kconsole\n");
  138.  
  139.     interrupts_enable();
  140.  
  141. #ifdef CONFIG_USERSPACE
  142.     /*
  143.      * Create the first user task.
  144.      */
  145.     m = vm_create(NULL);
  146.     if (!m)
  147.         panic("vm_create\n");
  148.     u = task_create(m);
  149.     if (!u)
  150.         panic("task_create\n");
  151.     t = thread_create(uinit, NULL, u, THREAD_USER_STACK);
  152.     if (!t)
  153.         panic("thread_create\n");
  154.  
  155.     /*
  156.      * Create the text vm_area and copy the userspace code there.
  157.      */
  158.     a = vm_area_create(m, VMA_TEXT, 1, UTEXT_ADDRESS);
  159.     if (!a)
  160.         panic("vm_area_create: vm_text\n");
  161.     vm_area_map(a, m);
  162.     memcpy((void *) PA2KA(a->mapping[0]), (void *) utext, utext_size < PAGE_SIZE ? utext_size : PAGE_SIZE);
  163.  
  164.     /*
  165.      * Create the data vm_area.
  166.      */
  167.     a = vm_area_create(m, VMA_STACK, 1, USTACK_ADDRESS);
  168.     if (!a)
  169.         panic("vm_area_create: vm_stack\n");
  170.     vm_area_map(a, m); 
  171.    
  172.     thread_ready(t);
  173. #endif /* CONFIG_USERSPACE */
  174.  
  175. #ifdef CONFIG_TEST
  176.     test();
  177. #endif /* CONFIG_TEST */
  178.  
  179.     if (!stdin) {
  180.         while (1) {
  181.             thread_sleep(1);
  182.             printf("kinit... ");
  183.         }
  184.     }
  185.  
  186. }
  187.