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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.     thread_t *t;
  72.     int i;
  73. #ifdef CONFIG_USERSPACE
  74.     vm_t *m;
  75.     vm_area_t *a;
  76.     task_t *u;
  77. #endif
  78.  
  79.     interrupts_disable();
  80.  
  81. #ifdef CONFIG_SMP          
  82.     if (config.cpu_count > 1) {
  83.         /*
  84.          * Create the kmp thread and wait for its completion.
  85.          * cpu1 through cpuN-1 will come up consecutively and
  86.          * not mess together with kcpulb threads.
  87.          * Just a beautification.
  88.          */
  89.         if ((t = thread_create(kmp, NULL, TASK, 0))) {
  90.             spinlock_lock(&t->lock);
  91.             t->flags |= X_WIRED;
  92.             t->cpu = &cpus[0];
  93.             spinlock_unlock(&t->lock);
  94.             thread_ready(t);
  95.             waitq_sleep(&kmp_completion_wq);
  96.         }
  97.         else panic("thread_create/kmp\n");
  98.     }
  99. #endif /* CONFIG_SMP */
  100.     /*
  101.      * Now that all CPUs are up, we can report what we've found.
  102.      */
  103.     for (i = 0; i < config.cpu_count; i++) {
  104.         if (cpus[i].active)
  105.             cpu_print_report(&cpus[i]);
  106.         else
  107.             printf("cpu%d: not active\n", i);
  108.     }
  109.  
  110. #ifdef CONFIG_SMP
  111.     if (config.cpu_count > 1) {
  112.         /*
  113.          * For each CPU, create its load balancing thread.
  114.          */
  115.         for (i = 0; i < config.cpu_count; i++) {
  116.  
  117.             if ((t = thread_create(kcpulb, NULL, TASK, 0))) {
  118.                 spinlock_lock(&t->lock);           
  119.                 t->flags |= X_WIRED;
  120.                 t->cpu = &cpus[i];
  121.                 spinlock_unlock(&t->lock);
  122.                 thread_ready(t);
  123.             }
  124.             else panic("thread_create/kcpulb\n");
  125.  
  126.         }
  127.     }
  128. #endif /* CONFIG_SMP */
  129.  
  130.     /*
  131.      * At this point SMP, if present, is configured.
  132.      */
  133.     arch_post_smp_init();
  134.  
  135.     /*
  136.      * Create kernel console.
  137.      */
  138.     if ((t = thread_create(kconsole, "kconsole", TASK, 0)))
  139.         thread_ready(t);
  140.     else panic("thread_create/kconsole\n");
  141.  
  142.     interrupts_enable();
  143.  
  144. #ifdef CONFIG_USERSPACE
  145.     /*
  146.      * Create the first user task.
  147.      */
  148.     m = vm_create(NULL);
  149.     if (!m)
  150.         panic("vm_create\n");
  151.     u = task_create(m);
  152.     if (!u)
  153.         panic("task_create\n");
  154.     t = thread_create(uinit, NULL, u, THREAD_USER_STACK);
  155.     if (!t)
  156.         panic("thread_create\n");
  157.  
  158.     /*
  159.      * Create the text vm_area and copy the userspace code there.
  160.      */
  161.     a = vm_area_create(m, VMA_TEXT, 1, UTEXT_ADDRESS);
  162.     if (!a)
  163.         panic("vm_area_create: vm_text\n");
  164.     vm_area_map(a, m);
  165.     if (config.init_size > 0)
  166.         memcpy((void *) PA2KA(a->mapping[0]), (void *) config.init_addr, config.init_size < PAGE_SIZE ? config.init_size : PAGE_SIZE);
  167.     else
  168.         memcpy((void *) PA2KA(a->mapping[0]), (void *) utext, utext_size < PAGE_SIZE ? utext_size : PAGE_SIZE);
  169.  
  170.     /*
  171.      * Create the data vm_area.
  172.      */
  173.     a = vm_area_create(m, VMA_STACK, 1, USTACK_ADDRESS);
  174.     if (!a)
  175.         panic("vm_area_create: vm_stack\n");
  176.     vm_area_map(a, m); 
  177.    
  178.     thread_ready(t);
  179. #endif /* CONFIG_USERSPACE */
  180.  
  181. #ifdef CONFIG_TEST
  182.     test();
  183. #endif /* CONFIG_TEST */
  184.  
  185.     if (!stdin) {
  186.         while (1) {
  187.             thread_sleep(1);
  188.             printf("kinit... ");
  189.         }
  190.     }
  191.  
  192. }
  193.