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