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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 | #ifndef __SCHEDULER_H__ |
29 | #ifndef __SCHEDULER_H__ |
30 | #define __SCHEDULER_H__ |
30 | #define __SCHEDULER_H__ |
31 | 31 | ||
32 | #include <synch/spinlock.h> |
32 | #include <synch/spinlock.h> |
33 | #include <time/clock.h> /* HZ */ |
33 | #include <time/clock.h> /* HZ */ |
34 | #include <typedefs.h> |
34 | #include <typedefs.h> |
35 | #include <list.h> |
35 | #include <list.h> |
36 | 36 | ||
37 | #define RQ_COUNT 16 |
37 | #define RQ_COUNT 16 |
38 | #define NEEDS_RELINK_MAX (HZ) |
38 | #define NEEDS_RELINK_MAX (HZ) |
39 | 39 | ||
40 | struct runq { |
40 | struct runq { |
41 | spinlock_t lock; |
41 | spinlock_t lock; |
42 | link_t rq_head; |
42 | link_t rq_head; |
43 | int n; |
43 | int n; |
44 | }; |
44 | }; |
45 | 45 | ||
46 | extern spinlock_t nrdylock; |
- | |
47 | extern volatile int nrdy; |
46 | extern volatile int nrdy; |
48 | 47 | ||
49 | static thread_t *find_best_thread(void); |
48 | static thread_t *find_best_thread(void); |
50 | static void relink_rq(int start); |
49 | static void relink_rq(int start); |
51 | static void scheduler_separated_stack(void); |
50 | static void scheduler_separated_stack(void); |
52 | 51 | ||
53 | extern void scheduler_init(void); |
52 | extern void scheduler_init(void); |
54 | 53 | ||
55 | extern void scheduler(void); |
54 | extern void scheduler(void); |
56 | extern void kcpulb(void *arg); |
55 | extern void kcpulb(void *arg); |
57 | 56 | ||
58 | /* |
57 | /* |
59 | * To be defined by architectures: |
58 | * To be defined by architectures: |
60 | */ |
59 | */ |
61 | 60 | ||
62 | extern void before_thread_runs(void); |
61 | extern void before_thread_runs(void); |
63 | extern void before_thread_runs_arch(void); |
62 | extern void before_thread_runs_arch(void); |
64 | 63 | ||
65 | #endif |
64 | #endif |
66 | 65 |