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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/as.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.     as_t *as;
  73.     as_area_t *a;
  74.     __address frame;
  75.     count_t frames;
  76.     int i;
  77.     task_t *u;
  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.     cpu_list();
  104.  
  105. #ifdef CONFIG_SMP
  106.     if (config.cpu_count > 1) {
  107.         int i;
  108.        
  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, "kconsole", TASK, 0)))
  136.         thread_ready(t);
  137.     else
  138.         panic("thread_create/kconsole\n");
  139.  
  140.     interrupts_enable();
  141.  
  142.     if (config.init_size > 0) {
  143.         /*
  144.          * Create the first user task.
  145.          */
  146.        
  147.         if (config.init_addr % FRAME_SIZE)
  148.             panic("config.init_addr is not frame aligned");
  149.        
  150.         as = as_create(0);
  151.         if (!as)
  152.             panic("as_create\n");
  153.         u = task_create(as);
  154.         if (!u)
  155.             panic("task_create\n");
  156.         t = thread_create(uinit, NULL, u, THREAD_USER_STACK);
  157.         if (!t)
  158.             panic("thread_create\n");
  159.        
  160.         /*
  161.          * Create the text as_area and initialize its mapping.
  162.          */
  163.        
  164.         frame = config.init_addr;
  165.         if (IS_KA(frame))
  166.             frame = KA2PA(frame);
  167.  
  168.         frames = config.init_size / FRAME_SIZE;
  169.         if (config.init_size % FRAME_SIZE > 0)
  170.             frames++;
  171.        
  172.         a = as_area_create(as, AS_AREA_TEXT, frames, UTEXT_ADDRESS);
  173.         if (!a)
  174.             panic("as_area_create: text\n");
  175.  
  176.         for (i = 0; i < frames; i++)
  177.             as_set_mapping(as, UTEXT_ADDRESS + i * PAGE_SIZE, frame + i * FRAME_SIZE);
  178.  
  179.         /*
  180.          * Create the data as_area.
  181.          */
  182.         a = as_area_create(as, AS_AREA_STACK, 1, USTACK_ADDRESS);
  183.         if (!a)
  184.             panic("as_area_create: stack\n");
  185.  
  186.         thread_ready(t);
  187.     }
  188.  
  189. #ifdef CONFIG_TEST
  190.     test();
  191. #endif /* CONFIG_TEST */
  192.  
  193.     if (!stdin) {
  194.         while (1) {
  195.             thread_sleep(1);
  196.             printf("kinit... ");
  197.         }
  198.     }
  199.  
  200. }
  201.