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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. #include <elf.h>
  50.  
  51. #ifdef CONFIG_SMP
  52. #include <arch/smp/mps.h>
  53. #endif /* CONFIG_SMP */
  54.  
  55. #include <synch/waitq.h>
  56. #include <synch/spinlock.h>
  57.  
  58. #ifdef CONFIG_TEST
  59. #include <test.h>
  60. #endif /* CONFIG_TEST */
  61.  
  62. /** Kernel initialization thread.
  63.  *
  64.  * kinit takes care of higher level kernel
  65.  * initialization (i.e. thread creation,
  66.  * userspace initialization etc.).
  67.  *
  68.  * @param arg Not used.
  69.  */
  70. void kinit(void *arg)
  71. {
  72.     thread_t *t;
  73.     as_t *as;
  74.     as_area_t *a;
  75.     int rc;
  76.     task_t *u;
  77.  
  78.     interrupts_disable();
  79.  
  80. #ifdef CONFIG_SMP          
  81.     if (config.cpu_count > 1) {
  82.         /*
  83.          * Create the kmp thread and wait for its completion.
  84.          * cpu1 through cpuN-1 will come up consecutively and
  85.          * not mess together with kcpulb threads.
  86.          * Just a beautification.
  87.          */
  88.         if ((t = thread_create(kmp, NULL, TASK, 0))) {
  89.             spinlock_lock(&t->lock);
  90.             t->flags |= X_WIRED;
  91.             t->cpu = &cpus[0];
  92.             spinlock_unlock(&t->lock);
  93.             thread_ready(t);
  94.             waitq_sleep(&kmp_completion_wq);
  95.         }
  96.         else panic("thread_create/kmp\n");
  97.     }
  98. #endif /* CONFIG_SMP */
  99.     /*
  100.      * Now that all CPUs are up, we can report what we've found.
  101.      */
  102.     cpu_list();
  103.  
  104. #ifdef CONFIG_SMP
  105.     if (config.cpu_count > 1) {
  106.         int i;
  107.        
  108.         /*
  109.          * For each CPU, create its load balancing thread.
  110.          */
  111.         for (i = 0; i < config.cpu_count; i++) {
  112.  
  113.             if ((t = thread_create(kcpulb, NULL, TASK, 0))) {
  114.                 spinlock_lock(&t->lock);           
  115.                 t->flags |= X_WIRED;
  116.                 t->cpu = &cpus[i];
  117.                 spinlock_unlock(&t->lock);
  118.                 thread_ready(t);
  119.             }
  120.             else panic("thread_create/kcpulb\n");
  121.  
  122.         }
  123.     }
  124. #endif /* CONFIG_SMP */
  125.  
  126.     /*
  127.      * At this point SMP, if present, is configured.
  128.      */
  129.     arch_post_smp_init();
  130.  
  131.     /*
  132.      * Create kernel console.
  133.      */
  134.     if ((t = thread_create(kconsole, "kconsole", TASK, 0)))
  135.         thread_ready(t);
  136.     else
  137.         panic("thread_create/kconsole\n");
  138.  
  139.     interrupts_enable();
  140.  
  141.     ipc_create_phonecompany();
  142.  
  143.     if (config.init_size > 0) {
  144.         /*
  145.          * Create the first user task.
  146.          */
  147.        
  148.         if (config.init_addr % FRAME_SIZE)
  149.             panic("config.init_addr is not frame aligned");
  150.        
  151.         as = as_create(0);
  152.         if (!as)
  153.             panic("as_create\n");
  154.  
  155.         rc = elf_load((elf_header_t *) config.init_addr, as);
  156.         if (rc != EE_OK) {
  157.             printf("elf_load failed: %s\n", elf_error(rc));
  158.         } else {
  159.             u = task_create(as);
  160.             if (!u)
  161.                 panic("task_create\n");
  162.             t = thread_create(uinit, (void *)((elf_header_t *) config.init_addr)->e_entry, u, THREAD_USER_STACK);
  163.             if (!t)
  164.                 panic("thread_create\n");
  165.        
  166.             /*
  167.              * Create the data as_area.
  168.              */
  169.             a = as_area_create(as, AS_AREA_STACK, 1, USTACK_ADDRESS);
  170.             if (!a)
  171.                 panic("as_area_create: stack\n");
  172.  
  173.             thread_ready(t);
  174.         }
  175.     }
  176.  
  177. #ifdef CONFIG_TEST
  178.     test();
  179. #endif /* CONFIG_TEST */
  180.  
  181.     if (!stdin) {
  182.         while (1) {
  183.             thread_sleep(1);
  184.             printf("kinit... ");
  185.         }
  186.     }
  187.  
  188. }
  189.