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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 <config.h>
  30. #include <arch.h>
  31. #include <main/kinit.h>
  32. #include <main/uinit.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 <print.h>
  44. #include <memstr.h>
  45.  
  46. #ifdef CONFIG_SMP
  47. #include <arch/smp/mps.h>
  48. #endif /* CONFIG_SMP */
  49.  
  50. #include <synch/waitq.h>
  51. #include <synch/spinlock.h>
  52.  
  53. #ifdef CONFIG_TEST
  54. #include <test.h>
  55. #endif /* CONFIG_TEST */
  56.  
  57. #include <mm/frame.h>
  58.  
  59. void kinit(void *arg)
  60. {
  61.     vm_t *m;
  62.     vm_area_t *a;
  63.     task_t *u;
  64.     thread_t *t;
  65.     int i;
  66.  
  67.     interrupts_disable();
  68.  
  69. #ifdef CONFIG_SMP          
  70.     if (config.cpu_count > 1) {
  71.         /*
  72.          * Create the kmp thread and wait for its completion.
  73.          * cpu1 through cpuN-1 will come up consecutively and
  74.          * not mess together with kcpulb threads.
  75.          * Just a beautification.
  76.          */
  77.         if (t = thread_create(kmp, NULL, TASK, 0)) {
  78.             spinlock_lock(&t->lock);
  79.             t->flags |= X_WIRED;
  80.             t->cpu = &cpus[0];
  81.             spinlock_unlock(&t->lock);
  82.             thread_ready(t);
  83.             waitq_sleep(&kmp_completion_wq);
  84.         }
  85.         else panic("thread_create/kmp");
  86.     }
  87. #endif /* CONFIG_SMP */
  88.     /*
  89.      * Now that all CPUs are up, we can report what we've found.
  90.      */
  91.     for (i = 0; i < config.cpu_count; i++) {
  92.         if (cpus[i].active)
  93.             cpu_print_report(&cpus[i]);
  94.         else
  95.             printf("cpu%d: not active\n", i);
  96.     }
  97.  
  98. #ifdef CONFIG_SMP
  99.     if (config.cpu_count > 1) {
  100.         /*
  101.          * For each CPU, create its load balancing thread.
  102.          */
  103.         for (i = 0; i < config.cpu_count; i++) {
  104.  
  105.             if (t = thread_create(kcpulb, NULL, TASK, 0)) {
  106.                 spinlock_lock(&t->lock);           
  107.                 t->flags |= X_WIRED;
  108.                 t->cpu = &cpus[i];
  109.                 spinlock_unlock(&t->lock);
  110.                 thread_ready(t);
  111.             }
  112.             else panic("thread_create/kcpulb");
  113.  
  114.         }
  115.     }
  116. #endif /* CONFIG_SMP */
  117.  
  118.     interrupts_enable();
  119.  
  120. #ifdef CONFIG_USERSPACE
  121.     /*
  122.      * Create the first user task.
  123.      */
  124.     m = vm_create(NULL);
  125.     if (!m)
  126.         panic("vm_create");
  127.     u = task_create(m);
  128.     if (!u)
  129.         panic("task_create");
  130.     t = thread_create(uinit, NULL, u, THREAD_USER_STACK);
  131.     if (!t)
  132.         panic("thread_create");
  133.  
  134.     /*
  135.      * Create the text vm_area and copy the userspace code there.
  136.      */
  137.     a = vm_area_create(m, VMA_TEXT, 1, UTEXT_ADDRESS);
  138.     if (!a)
  139.         panic("vm_area_create: vm_text");
  140.     vm_area_map(a, m);
  141.     memcpy((void *) PA2KA(a->mapping[0]), (void *) utext, utext_size < PAGE_SIZE ? utext_size : PAGE_SIZE);
  142.  
  143.     /*
  144.      * Create the data vm_area.
  145.      */
  146.     a = vm_area_create(m, VMA_STACK, 1, USTACK_ADDRESS);
  147.     if (!a)
  148.         panic("vm_area_create: vm_stack");
  149.     vm_area_map(a, m); 
  150.    
  151.     thread_ready(t);
  152. #endif /* CONFIG_USERSPACE */
  153.  
  154. #ifdef CONFIG_TEST
  155.     test();
  156. #endif /* CONFIG_TEST */
  157.  
  158.  
  159.     while (1) {
  160.         thread_usleep(1000000);
  161.         printf("kinit... ");
  162.     }
  163.  
  164. }
  165.