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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <proc/thread.h> |
29 | #include <proc/thread.h> |
30 | #include <proc/task.h> |
30 | #include <proc/task.h> |
31 | #include <mm/vm.h> |
31 | #include <mm/vm.h> |
32 | #include <mm/heap.h> |
32 | #include <mm/heap.h> |
33 | 33 | ||
34 | #include <synch/spinlock.h> |
34 | #include <synch/spinlock.h> |
35 | #include <arch.h> |
35 | #include <arch.h> |
36 | #include <panic.h> |
36 | #include <panic.h> |
37 | #include <list.h> |
37 | #include <list.h> |
38 | 38 | ||
39 | spinlock_t tasks_lock; |
39 | spinlock_t tasks_lock; |
40 | link_t tasks_head; |
40 | link_t tasks_head; |
41 | 41 | ||
42 | 42 | ||
43 | /** Initialize tasks |
43 | /** Initialize tasks |
44 | * |
44 | * |
45 | * Initialize kernel tasks support. |
45 | * Initialize kernel tasks support. |
46 | * |
46 | * |
47 | */ |
47 | */ |
48 | void task_init(void) |
48 | void task_init(void) |
49 | { |
49 | { |
50 | TASK = NULL; |
50 | TASK = NULL; |
51 | spinlock_initialize(&tasks_lock); |
51 | spinlock_initialize(&tasks_lock, "tasks_lock"); |
52 | list_initialize(&tasks_head); |
52 | list_initialize(&tasks_head); |
53 | } |
53 | } |
54 | 54 | ||
55 | 55 | ||
56 | /** Create new task |
56 | /** Create new task |
57 | * |
57 | * |
58 | * Create new task with no threads. |
58 | * Create new task with no threads. |
59 | * |
59 | * |
60 | * @param m Task's virtual memory structure. |
60 | * @param m Task's virtual memory structure. |
61 | * |
61 | * |
62 | * @return New task's structure on success, NULL on failure. |
62 | * @return New task's structure on success, NULL on failure. |
63 | * |
63 | * |
64 | */ |
64 | */ |
65 | task_t *task_create(vm_t *m) |
65 | task_t *task_create(vm_t *m) |
66 | { |
66 | { |
67 | ipl_t ipl; |
67 | ipl_t ipl; |
68 | task_t *ta; |
68 | task_t *ta; |
69 | 69 | ||
70 | ta = (task_t *) malloc(sizeof(task_t)); |
70 | ta = (task_t *) malloc(sizeof(task_t)); |
71 | if (ta) { |
71 | if (ta) { |
72 | spinlock_initialize(&ta->lock); |
72 | spinlock_initialize(&ta->lock, "task_ta_lock"); |
73 | list_initialize(&ta->th_head); |
73 | list_initialize(&ta->th_head); |
74 | list_initialize(&ta->tasks_link); |
74 | list_initialize(&ta->tasks_link); |
75 | ta->vm = m; |
75 | ta->vm = m; |
76 | 76 | ||
77 | ipl = interrupts_disable(); |
77 | ipl = interrupts_disable(); |
78 | spinlock_lock(&tasks_lock); |
78 | spinlock_lock(&tasks_lock); |
79 | list_append(&ta->tasks_link, &tasks_head); |
79 | list_append(&ta->tasks_link, &tasks_head); |
80 | spinlock_unlock(&tasks_lock); |
80 | spinlock_unlock(&tasks_lock); |
81 | interrupts_restore(ipl); |
81 | interrupts_restore(ipl); |
82 | } |
82 | } |
83 | return ta; |
83 | return ta; |
84 | } |
84 | } |
85 | 85 | ||
86 | 86 |