1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreSchedulerSMP
*
* @brief This header file provides interfaces of the
* @ref RTEMSScoreSchedulerSMP which are used by the implementation and the
* @ref RTEMSImplApplConfig.
*/
/*
* Copyright (c) 2013-2014 embedded brains GmbH. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTEMS_SCORE_SCHEDULERSMP_H
#define _RTEMS_SCORE_SCHEDULERSMP_H
#include <rtems/score/chain.h>
#include <rtems/score/scheduler.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup RTEMSScoreSchedulerSMP SMP Scheduler
*
* @ingroup RTEMSScoreScheduler
*
* @brief This group contains the SMP Scheduler implementation.
*
* @{
*/
/**
* @brief Scheduler context specialization for SMP schedulers.
*/
typedef struct {
/**
* @brief Basic scheduler context.
*/
Scheduler_Context Base;
/**
* @brief The chain of scheduled nodes.
*/
Chain_Control Scheduled;
} Scheduler_SMP_Context;
/**
* @brief SMP scheduler node states.
*/
typedef enum {
/**
* @brief This scheduler node is blocked.
*
* A scheduler node is blocked if the corresponding thread is not ready.
*/
SCHEDULER_SMP_NODE_BLOCKED,
/**
* @brief The scheduler node is scheduled.
*
* A scheduler node is scheduled if the corresponding thread is ready and the
* scheduler allocated a processor for it. A scheduled node is assigned to
* exactly one processor. The count of scheduled nodes in this scheduler
* instance equals the processor count owned by the scheduler instance.
*/
SCHEDULER_SMP_NODE_SCHEDULED,
/**
* @brief This scheduler node is ready.
*
* A scheduler node is ready if the corresponding thread is ready and the
* scheduler did not allocate a processor for it.
*/
SCHEDULER_SMP_NODE_READY
} Scheduler_SMP_Node_state;
/**
* @brief Scheduler node specialization for SMP schedulers.
*/
typedef struct {
/**
* @brief Basic scheduler node.
*/
Scheduler_Node Base;
/**
* @brief The state of this node.
*/
Scheduler_SMP_Node_state state;
/**
* @brief The current priority of thread owning this node.
*/
Priority_Control priority;
} Scheduler_SMP_Node;
/**
* @brief Starts an idle thread on the specified cpu.
*
* @param scheduler The scheduler instance.
* @param[in, out] idle The idle thread to schedule.
* @param[out] cpu The cpu to run the idle thread on.
*/
void _Scheduler_SMP_Start_idle(
const Scheduler_Control *scheduler,
Thread_Control *idle,
struct Per_CPU_Control *cpu
);
/** @} */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _RTEMS_SCORE_SCHEDULERSMP_H */
|
