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