| 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 | /** @addtogroup genericproc
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #ifndef KERN_SCHEDULER_H_
|
|---|
| 36 | #define KERN_SCHEDULER_H_
|
|---|
| 37 |
|
|---|
| 38 | #include <synch/spinlock.h>
|
|---|
| 39 | #include <time/clock.h>
|
|---|
| 40 | #include <typedefs.h>
|
|---|
| 41 | #include <atomic.h>
|
|---|
| 42 | #include <adt/list.h>
|
|---|
| 43 |
|
|---|
| 44 | #define RQ_COUNT 16
|
|---|
| 45 | #define NEEDS_RELINK_MAX (HZ)
|
|---|
| 46 |
|
|---|
| 47 | /** Scheduler run queue structure. */
|
|---|
| 48 | typedef struct {
|
|---|
| 49 | IRQ_SPINLOCK_DECLARE(lock);
|
|---|
| 50 | link_t rq_head; /**< List of ready threads. */
|
|---|
| 51 | size_t n; /**< Number of threads in rq_ready. */
|
|---|
| 52 | } runq_t;
|
|---|
| 53 |
|
|---|
| 54 | extern atomic_t nrdy;
|
|---|
| 55 | extern void scheduler_init(void);
|
|---|
| 56 |
|
|---|
| 57 | extern void scheduler_fpu_lazy_request(void);
|
|---|
| 58 | extern void scheduler(void);
|
|---|
| 59 | extern void kcpulb(void *arg);
|
|---|
| 60 |
|
|---|
| 61 | extern void sched_print_list(void);
|
|---|
| 62 |
|
|---|
| 63 | /*
|
|---|
| 64 | * To be defined by architectures.
|
|---|
| 65 | */
|
|---|
| 66 | extern void before_task_runs_arch(void);
|
|---|
| 67 | extern void before_thread_runs_arch(void);
|
|---|
| 68 | extern void after_thread_ran_arch(void);
|
|---|
| 69 |
|
|---|
| 70 | #endif
|
|---|
| 71 |
|
|---|
| 72 | /** @}
|
|---|
| 73 | */
|
|---|
