source: rtems-libbsd/rtemsbsd/powerpc/include/linux/sched.h @ 9789434

55-freebsd-126-freebsd-12
Last change on this file since 9789434 was 28ee86a, checked in by Sebastian Huber <sebastian.huber@…>, on 04/27/16 at 09:58:19

Import DPAA driver snapshot

Imported from Freescale Linux repository

git://git.freescale.com/ppc/upstream/linux.git

commit 2774c204cd8bfc56a200ff4dcdfc9cdf5b6fc161.

Linux compatibility layer is partly from FreeBSD.

  • Property mode set to 100644
File size: 3.7 KB
Line 
1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31#ifndef _LINUX_SCHED_H_
32#define _LINUX_SCHED_H_
33
34#include <sys/param.h>
35#include <sys/lock.h>
36#include <sys/mutex.h>
37#include <sys/systm.h>
38#include <sys/proc.h>
39#include <sys/sched.h>
40#include <sys/sleepqueue.h>
41
42#define MAX_SCHEDULE_TIMEOUT    LONG_MAX
43
44#define TASK_DORMANT            0
45#define TASK_RUNNING            1
46#define TASK_INTERRUPTIBLE      2
47#define TASK_UNINTERRUPTIBLE    4
48#define TASK_DEAD               64
49#define TASK_WAKEKILL           128
50#define TASK_WAKING             256
51
52#define TASK_SHOULD_STOP        1
53#define TASK_STOPPED            2
54
55/*
56 * A task_struct is only provided for those tasks created with kthread.
57 * Using these routines with threads not started via kthread will cause
58 * panics because no task_struct is allocated and td_retval[1] is
59 * overwritten by syscalls which kernel threads will not make use of.
60 */
61struct task_struct {
62        struct  thread *task_thread;
63        int     (*task_fn)(void *data);
64        void    *task_data;
65        int     task_ret;
66        int     state;
67        int     should_stop;
68        struct mtx lock;
69};
70
71#define current                 ((struct task_struct *)curthread->td_retval[1])
72#define task_struct_get(x)      (struct task_struct *)(x)->td_retval[1]
73#define task_struct_set(x, y)   (x)->td_retval[1] = (register_t)(y)
74
75#define set_current_state(x)                                            \
76        atomic_store_rel_int((volatile int *)&current->state, (x))
77#define __set_current_state(x)  current->state = (x)
78
79
80#define schedule()                                                      \
81do {                                                                    \
82        void *c;                                                        \
83                                                                        \
84        if (cold)                                                       \
85                break;                                                  \
86        c = curthread;                                                  \
87        sleepq_lock(c);                                                 \
88        if (current->state == TASK_INTERRUPTIBLE ||                     \
89            current->state == TASK_UNINTERRUPTIBLE) {                   \
90                sleepq_add(c, NULL, "task", SLEEPQ_SLEEP, 0);           \
91                sleepq_wait(c, 0);                                      \
92        } else {                                                        \
93                sleepq_release(c);                                      \
94                sched_relinquish(curthread);                            \
95        }                                                               \
96} while (0)
97
98#define wake_up_process(x)                                              \
99do {                                                                    \
100        int wakeup_swapper;                                             \
101        void *c;                                                        \
102                                                                        \
103        c = (x)->task_thread;                                           \
104        sleepq_lock(c);                                                 \
105        (x)->state = TASK_RUNNING;                                      \
106        wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);          \
107        sleepq_release(c);                                              \
108        if (wakeup_swapper)                                             \
109                kick_proc0();                                           \
110} while (0)
111
112#define cond_resched()  if (!cold)      sched_relinquish(curthread)
113
114static inline long
115schedule_timeout(signed long timeout)
116{
117        if (timeout < 0)
118                return 0;
119
120        pause("lstim", timeout);
121
122        return 0;
123}
124
125#endif  /* _LINUX_SCHED_H_ */
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