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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/uinit.h>
  30. #include <proc/thread.h>
  31. #include <proc/task.h>
  32. #include <proc/uarg.h>
  33. #include <mm/as.h>
  34. #include <mm/slab.h>
  35. #include <synch/spinlock.h>
  36. #include <arch.h>
  37. #include <panic.h>
  38. #include <adt/btree.h>
  39. #include <adt/list.h>
  40. #include <ipc/ipc.h>
  41. #include <memstr.h>
  42. #include <print.h>
  43. #include <elf.h>
  44.  
  45.  
  46. #define LOADED_PROG_STACK_PAGES_NO 2
  47.  
  48. SPINLOCK_INITIALIZE(tasks_lock);
  49. btree_t tasks_btree;
  50. static task_id_t task_counter = 0;
  51.  
  52. /** Initialize tasks
  53.  *
  54.  * Initialize kernel tasks support.
  55.  *
  56.  */
  57. void task_init(void)
  58. {
  59.     TASK = NULL;
  60.     btree_create(&tasks_btree);
  61. }
  62.  
  63.  
  64. /** Create new task
  65.  *
  66.  * Create new task with no threads.
  67.  *
  68.  * @param as Task's address space.
  69.  * @param name Symbolic name.
  70.  *
  71.  * @return New task's structure
  72.  *
  73.  */
  74. task_t *task_create(as_t *as, char *name)
  75. {
  76.     ipl_t ipl;
  77.     task_t *ta;
  78.     int i;
  79.    
  80.     ta = (task_t *) malloc(sizeof(task_t), 0);
  81.  
  82.     spinlock_initialize(&ta->lock, "task_ta_lock");
  83.     list_initialize(&ta->th_head);
  84.     ta->as = as;
  85.     ta->name = name;
  86.  
  87.    
  88.     ipc_answerbox_init(&ta->answerbox);
  89.     for (i=0; i < IPC_MAX_PHONES;i++)
  90.         ipc_phone_init(&ta->phones[i]);
  91.     if (ipc_phone_0)
  92.         ipc_phone_connect(&ta->phones[0], ipc_phone_0);
  93.     atomic_set(&ta->active_calls, 0);
  94.    
  95.     ipl = interrupts_disable();
  96.     spinlock_lock(&tasks_lock);
  97.  
  98.     ta->taskid = ++task_counter;
  99.     btree_insert(&tasks_btree, (__native) ta, (void *) ta, NULL);
  100.  
  101.     spinlock_unlock(&tasks_lock);
  102.     interrupts_restore(ipl);
  103.  
  104.     return ta;
  105. }
  106.  
  107. /** Create new task with 1 thread and run it
  108.  *
  109.  * @param programe_addr Address of program executable image.
  110.  * @param name Program name.
  111.  *
  112.  * @return Task of the running program or NULL on error
  113.  */
  114. task_t * task_run_program(void *program_addr, char *name)
  115. {
  116.     as_t *as;
  117.     as_area_t *a;
  118.     int rc;
  119.     thread_t *t;
  120.     task_t *task;
  121.     uspace_arg_t *kernel_uarg;
  122.  
  123.     as = as_create(0);
  124.     ASSERT(as);
  125.  
  126.     rc = elf_load((elf_header_t *) program_addr, as);
  127.     if (rc != EE_OK) {
  128.         as_free(as);
  129.         return NULL;
  130.     }
  131.    
  132.     kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0);
  133.     kernel_uarg->uspace_entry = (void *) ((elf_header_t *) program_addr)->e_entry;
  134.     kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS;
  135.     kernel_uarg->uspace_thread_function = NULL;
  136.     kernel_uarg->uspace_thread_arg = NULL;
  137.     kernel_uarg->uspace_uarg = NULL;
  138.    
  139.     task = task_create(as, name);
  140.     ASSERT(task);
  141.  
  142.     /*
  143.      * Create the data as_area.
  144.      */
  145.     a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE, LOADED_PROG_STACK_PAGES_NO*PAGE_SIZE, USTACK_ADDRESS);
  146.  
  147.     t = thread_create(uinit, kernel_uarg, task, 0, "uinit");
  148.     ASSERT(t);
  149.     thread_ready(t);
  150.    
  151.     return task;
  152. }
  153.  
  154. /** Print task list */
  155. void task_print_list(void)
  156. {
  157.     link_t *cur;
  158.     ipl_t ipl;
  159.    
  160.     /* Messing with thread structures, avoid deadlock */
  161.     ipl = interrupts_disable();
  162.     spinlock_lock(&tasks_lock);
  163.  
  164.     for (cur = tasks_btree.leaf_head.next; cur != &tasks_btree.leaf_head; cur = cur->next) {
  165.         btree_node_t *node;
  166.         int i;
  167.        
  168.         node = list_get_instance(cur, btree_node_t, leaf_link);
  169.         for (i = 0; i < node->keys; i++) {
  170.             task_t *t;
  171.             int j;
  172.  
  173.             t = (task_t *) node->value[i];
  174.        
  175.             spinlock_lock(&t->lock);
  176.             printf("%s: address=%P, taskid=%Q, as=%P, ActiveCalls: %d",
  177.                 t->name, t, t->taskid, t->as, atomic_get(&t->active_calls));
  178.             for (j=0; j < IPC_MAX_PHONES; j++) {
  179.                 if (t->phones[j].callee)
  180.                     printf(" Ph(%d): %P ", j, t->phones[j].callee);
  181.             }
  182.             printf("\n");
  183.             spinlock_unlock(&t->lock);
  184.         }
  185.     }
  186.  
  187.     spinlock_unlock(&tasks_lock);
  188.     interrupts_restore(ipl);
  189.    
  190. }
  191.