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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __SCHEDULER_H__ |
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| 30 | #define __SCHEDULER_H__ |
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| 31 | |||
| 32 | #include <synch/spinlock.h> |
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| 33 | #include <time/clock.h> /* HZ */ |
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| 34 | #include <typedefs.h> |
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| 1104 | jermar | 35 | #include <atomic.h> |
| 788 | jermar | 36 | #include <adt/list.h> |
| 1 | jermar | 37 | |
| 38 | #define RQ_COUNT 16 |
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| 39 | #define NEEDS_RELINK_MAX (HZ) |
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| 40 | |||
| 483 | jermar | 41 | /** Scheduler run queue structure. */ |
| 1 | jermar | 42 | struct runq { |
| 623 | jermar | 43 | SPINLOCK_DECLARE(lock); |
| 410 | jermar | 44 | link_t rq_head; /**< List of ready threads. */ |
| 483 | jermar | 45 | count_t n; /**< Number of threads in rq_ready. */ |
| 1 | jermar | 46 | }; |
| 47 | |||
| 475 | jermar | 48 | extern atomic_t nrdy; |
| 1 | jermar | 49 | extern void scheduler_init(void); |
| 50 | |||
| 309 | palkovsky | 51 | extern void scheduler_fpu_lazy_request(void); |
| 1 | jermar | 52 | extern void scheduler(void); |
| 53 | extern void kcpulb(void *arg); |
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| 54 | |||
| 775 | palkovsky | 55 | extern void sched_print_list(void); |
| 897 | jermar | 56 | |
| 22 | jermar | 57 | /* |
| 58 | * To be defined by architectures: |
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| 59 | */ |
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| 1187 | jermar | 60 | extern void before_task_runs_arch(void); |
| 52 | vana | 61 | extern void before_thread_runs_arch(void); |
| 897 | jermar | 62 | extern void after_thread_ran_arch(void); |
| 22 | jermar | 63 | |
| 1 | jermar | 64 | #endif |