1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @brief Simple SMP Scheduler Implementation |
---|
5 | * |
---|
6 | * @ingroup ScoreSchedulerSMPSimple |
---|
7 | */ |
---|
8 | |
---|
9 | /* |
---|
10 | * Copyright (c) 2013, 2016 embedded brains GmbH. |
---|
11 | * |
---|
12 | * The license and distribution terms for this file may be |
---|
13 | * found in the file LICENSE in this distribution or at |
---|
14 | * http://www.rtems.org/license/LICENSE. |
---|
15 | */ |
---|
16 | |
---|
17 | #if HAVE_CONFIG_H |
---|
18 | #include "config.h" |
---|
19 | #endif |
---|
20 | |
---|
21 | #include <rtems/score/schedulersimplesmp.h> |
---|
22 | #include <rtems/score/schedulersmpimpl.h> |
---|
23 | |
---|
24 | static Scheduler_simple_SMP_Context * |
---|
25 | _Scheduler_simple_SMP_Get_context( const Scheduler_Control *scheduler ) |
---|
26 | { |
---|
27 | return (Scheduler_simple_SMP_Context *) _Scheduler_Get_context( scheduler ); |
---|
28 | } |
---|
29 | |
---|
30 | static Scheduler_simple_SMP_Context * |
---|
31 | _Scheduler_simple_SMP_Get_self( Scheduler_Context *context ) |
---|
32 | { |
---|
33 | return (Scheduler_simple_SMP_Context *) context; |
---|
34 | } |
---|
35 | |
---|
36 | void _Scheduler_simple_SMP_Initialize( const Scheduler_Control *scheduler ) |
---|
37 | { |
---|
38 | Scheduler_simple_SMP_Context *self = |
---|
39 | _Scheduler_simple_SMP_Get_context( scheduler ); |
---|
40 | |
---|
41 | _Scheduler_SMP_Initialize( &self->Base ); |
---|
42 | _Chain_Initialize_empty( &self->Ready ); |
---|
43 | } |
---|
44 | |
---|
45 | void _Scheduler_simple_SMP_Node_initialize( |
---|
46 | const Scheduler_Control *scheduler, |
---|
47 | Scheduler_Node *node, |
---|
48 | Thread_Control *the_thread, |
---|
49 | Priority_Control priority |
---|
50 | ) |
---|
51 | { |
---|
52 | Scheduler_SMP_Node *smp_node; |
---|
53 | |
---|
54 | smp_node = _Scheduler_SMP_Node_downcast( node ); |
---|
55 | _Scheduler_SMP_Node_initialize( scheduler, smp_node, the_thread, priority ); |
---|
56 | } |
---|
57 | |
---|
58 | static void _Scheduler_simple_SMP_Do_update( |
---|
59 | Scheduler_Context *context, |
---|
60 | Scheduler_Node *node, |
---|
61 | Priority_Control new_priority |
---|
62 | ) |
---|
63 | { |
---|
64 | Scheduler_SMP_Node *smp_node; |
---|
65 | |
---|
66 | (void) context; |
---|
67 | |
---|
68 | smp_node = _Scheduler_SMP_Node_downcast( node ); |
---|
69 | _Scheduler_SMP_Node_update_priority( smp_node, new_priority ); |
---|
70 | } |
---|
71 | |
---|
72 | static bool _Scheduler_simple_SMP_Has_ready( Scheduler_Context *context ) |
---|
73 | { |
---|
74 | Scheduler_simple_SMP_Context *self = |
---|
75 | _Scheduler_simple_SMP_Get_self( context ); |
---|
76 | |
---|
77 | return !_Chain_Is_empty( &self->Ready ); |
---|
78 | } |
---|
79 | |
---|
80 | static Scheduler_Node *_Scheduler_simple_SMP_Get_highest_ready( |
---|
81 | Scheduler_Context *context, |
---|
82 | Scheduler_Node *node |
---|
83 | ) |
---|
84 | { |
---|
85 | Scheduler_simple_SMP_Context *self = |
---|
86 | _Scheduler_simple_SMP_Get_self( context ); |
---|
87 | Scheduler_Node *first = (Scheduler_Node *) _Chain_First( &self->Ready ); |
---|
88 | |
---|
89 | (void) node; |
---|
90 | |
---|
91 | _Assert( &first->Node.Chain != _Chain_Tail( &self->Ready ) ); |
---|
92 | |
---|
93 | return first; |
---|
94 | } |
---|
95 | |
---|
96 | static void _Scheduler_simple_SMP_Move_from_scheduled_to_ready( |
---|
97 | Scheduler_Context *context, |
---|
98 | Scheduler_Node *scheduled_to_ready |
---|
99 | ) |
---|
100 | { |
---|
101 | Scheduler_simple_SMP_Context *self = |
---|
102 | _Scheduler_simple_SMP_Get_self( context ); |
---|
103 | |
---|
104 | _Chain_Extract_unprotected( &scheduled_to_ready->Node.Chain ); |
---|
105 | _Chain_Insert_ordered_unprotected( |
---|
106 | &self->Ready, |
---|
107 | &scheduled_to_ready->Node.Chain, |
---|
108 | _Scheduler_SMP_Insert_priority_lifo_order |
---|
109 | ); |
---|
110 | } |
---|
111 | |
---|
112 | static void _Scheduler_simple_SMP_Move_from_ready_to_scheduled( |
---|
113 | Scheduler_Context *context, |
---|
114 | Scheduler_Node *ready_to_scheduled |
---|
115 | ) |
---|
116 | { |
---|
117 | Scheduler_simple_SMP_Context *self = |
---|
118 | _Scheduler_simple_SMP_Get_self( context ); |
---|
119 | |
---|
120 | _Chain_Extract_unprotected( &ready_to_scheduled->Node.Chain ); |
---|
121 | _Chain_Insert_ordered_unprotected( |
---|
122 | &self->Base.Scheduled, |
---|
123 | &ready_to_scheduled->Node.Chain, |
---|
124 | _Scheduler_SMP_Insert_priority_fifo_order |
---|
125 | ); |
---|
126 | } |
---|
127 | |
---|
128 | static void _Scheduler_simple_SMP_Insert_ready_lifo( |
---|
129 | Scheduler_Context *context, |
---|
130 | Scheduler_Node *node_to_insert |
---|
131 | ) |
---|
132 | { |
---|
133 | Scheduler_simple_SMP_Context *self = |
---|
134 | _Scheduler_simple_SMP_Get_self( context ); |
---|
135 | |
---|
136 | _Chain_Insert_ordered_unprotected( |
---|
137 | &self->Ready, |
---|
138 | &node_to_insert->Node.Chain, |
---|
139 | _Scheduler_SMP_Insert_priority_lifo_order |
---|
140 | ); |
---|
141 | } |
---|
142 | |
---|
143 | static void _Scheduler_simple_SMP_Insert_ready_fifo( |
---|
144 | Scheduler_Context *context, |
---|
145 | Scheduler_Node *node_to_insert |
---|
146 | ) |
---|
147 | { |
---|
148 | Scheduler_simple_SMP_Context *self = |
---|
149 | _Scheduler_simple_SMP_Get_self( context ); |
---|
150 | |
---|
151 | _Chain_Insert_ordered_unprotected( |
---|
152 | &self->Ready, |
---|
153 | &node_to_insert->Node.Chain, |
---|
154 | _Scheduler_SMP_Insert_priority_fifo_order |
---|
155 | ); |
---|
156 | } |
---|
157 | |
---|
158 | static void _Scheduler_simple_SMP_Extract_from_ready( |
---|
159 | Scheduler_Context *context, |
---|
160 | Scheduler_Node *node_to_extract |
---|
161 | ) |
---|
162 | { |
---|
163 | (void) context; |
---|
164 | |
---|
165 | _Chain_Extract_unprotected( &node_to_extract->Node.Chain ); |
---|
166 | } |
---|
167 | |
---|
168 | void _Scheduler_simple_SMP_Block( |
---|
169 | const Scheduler_Control *scheduler, |
---|
170 | Thread_Control *thread, |
---|
171 | Scheduler_Node *node |
---|
172 | ) |
---|
173 | { |
---|
174 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
175 | |
---|
176 | _Scheduler_SMP_Block( |
---|
177 | context, |
---|
178 | thread, |
---|
179 | node, |
---|
180 | _Scheduler_simple_SMP_Extract_from_ready, |
---|
181 | _Scheduler_simple_SMP_Get_highest_ready, |
---|
182 | _Scheduler_simple_SMP_Move_from_ready_to_scheduled, |
---|
183 | _Scheduler_SMP_Allocate_processor_lazy |
---|
184 | ); |
---|
185 | } |
---|
186 | |
---|
187 | static bool _Scheduler_simple_SMP_Enqueue_ordered( |
---|
188 | Scheduler_Context *context, |
---|
189 | Scheduler_Node *node, |
---|
190 | Chain_Node_order order, |
---|
191 | Scheduler_SMP_Insert insert_ready, |
---|
192 | Scheduler_SMP_Insert insert_scheduled |
---|
193 | ) |
---|
194 | { |
---|
195 | return _Scheduler_SMP_Enqueue_ordered( |
---|
196 | context, |
---|
197 | node, |
---|
198 | order, |
---|
199 | insert_ready, |
---|
200 | insert_scheduled, |
---|
201 | _Scheduler_simple_SMP_Move_from_scheduled_to_ready, |
---|
202 | _Scheduler_SMP_Get_lowest_scheduled, |
---|
203 | _Scheduler_SMP_Allocate_processor_lazy |
---|
204 | ); |
---|
205 | } |
---|
206 | |
---|
207 | static bool _Scheduler_simple_SMP_Enqueue_lifo( |
---|
208 | Scheduler_Context *context, |
---|
209 | Scheduler_Node *node |
---|
210 | ) |
---|
211 | { |
---|
212 | return _Scheduler_simple_SMP_Enqueue_ordered( |
---|
213 | context, |
---|
214 | node, |
---|
215 | _Scheduler_SMP_Insert_priority_lifo_order, |
---|
216 | _Scheduler_simple_SMP_Insert_ready_lifo, |
---|
217 | _Scheduler_SMP_Insert_scheduled_lifo |
---|
218 | ); |
---|
219 | } |
---|
220 | |
---|
221 | static bool _Scheduler_simple_SMP_Enqueue_fifo( |
---|
222 | Scheduler_Context *context, |
---|
223 | Scheduler_Node *node |
---|
224 | ) |
---|
225 | { |
---|
226 | return _Scheduler_simple_SMP_Enqueue_ordered( |
---|
227 | context, |
---|
228 | node, |
---|
229 | _Scheduler_SMP_Insert_priority_fifo_order, |
---|
230 | _Scheduler_simple_SMP_Insert_ready_fifo, |
---|
231 | _Scheduler_SMP_Insert_scheduled_fifo |
---|
232 | ); |
---|
233 | } |
---|
234 | |
---|
235 | static bool _Scheduler_simple_SMP_Enqueue_scheduled_ordered( |
---|
236 | Scheduler_Context *context, |
---|
237 | Scheduler_Node *node, |
---|
238 | Chain_Node_order order, |
---|
239 | Scheduler_SMP_Insert insert_ready, |
---|
240 | Scheduler_SMP_Insert insert_scheduled |
---|
241 | ) |
---|
242 | { |
---|
243 | return _Scheduler_SMP_Enqueue_scheduled_ordered( |
---|
244 | context, |
---|
245 | node, |
---|
246 | order, |
---|
247 | _Scheduler_simple_SMP_Extract_from_ready, |
---|
248 | _Scheduler_simple_SMP_Get_highest_ready, |
---|
249 | insert_ready, |
---|
250 | insert_scheduled, |
---|
251 | _Scheduler_simple_SMP_Move_from_ready_to_scheduled, |
---|
252 | _Scheduler_SMP_Allocate_processor_lazy |
---|
253 | ); |
---|
254 | } |
---|
255 | |
---|
256 | static bool _Scheduler_simple_SMP_Enqueue_scheduled_lifo( |
---|
257 | Scheduler_Context *context, |
---|
258 | Scheduler_Node *node |
---|
259 | ) |
---|
260 | { |
---|
261 | return _Scheduler_simple_SMP_Enqueue_scheduled_ordered( |
---|
262 | context, |
---|
263 | node, |
---|
264 | _Scheduler_SMP_Insert_priority_lifo_order, |
---|
265 | _Scheduler_simple_SMP_Insert_ready_lifo, |
---|
266 | _Scheduler_SMP_Insert_scheduled_lifo |
---|
267 | ); |
---|
268 | } |
---|
269 | |
---|
270 | static bool _Scheduler_simple_SMP_Enqueue_scheduled_fifo( |
---|
271 | Scheduler_Context *context, |
---|
272 | Scheduler_Node *node |
---|
273 | ) |
---|
274 | { |
---|
275 | return _Scheduler_simple_SMP_Enqueue_scheduled_ordered( |
---|
276 | context, |
---|
277 | node, |
---|
278 | _Scheduler_SMP_Insert_priority_fifo_order, |
---|
279 | _Scheduler_simple_SMP_Insert_ready_fifo, |
---|
280 | _Scheduler_SMP_Insert_scheduled_fifo |
---|
281 | ); |
---|
282 | } |
---|
283 | |
---|
284 | void _Scheduler_simple_SMP_Unblock( |
---|
285 | const Scheduler_Control *scheduler, |
---|
286 | Thread_Control *thread, |
---|
287 | Scheduler_Node *node |
---|
288 | ) |
---|
289 | { |
---|
290 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
291 | |
---|
292 | _Scheduler_SMP_Unblock( |
---|
293 | context, |
---|
294 | thread, |
---|
295 | node, |
---|
296 | _Scheduler_simple_SMP_Do_update, |
---|
297 | _Scheduler_simple_SMP_Enqueue_fifo |
---|
298 | ); |
---|
299 | } |
---|
300 | |
---|
301 | static bool _Scheduler_simple_SMP_Do_ask_for_help( |
---|
302 | Scheduler_Context *context, |
---|
303 | Thread_Control *the_thread, |
---|
304 | Scheduler_Node *node |
---|
305 | ) |
---|
306 | { |
---|
307 | return _Scheduler_SMP_Ask_for_help( |
---|
308 | context, |
---|
309 | the_thread, |
---|
310 | node, |
---|
311 | _Scheduler_SMP_Insert_priority_lifo_order, |
---|
312 | _Scheduler_simple_SMP_Insert_ready_lifo, |
---|
313 | _Scheduler_SMP_Insert_scheduled_lifo, |
---|
314 | _Scheduler_simple_SMP_Move_from_scheduled_to_ready, |
---|
315 | _Scheduler_SMP_Get_lowest_scheduled, |
---|
316 | _Scheduler_SMP_Allocate_processor_lazy |
---|
317 | ); |
---|
318 | } |
---|
319 | |
---|
320 | void _Scheduler_simple_SMP_Update_priority( |
---|
321 | const Scheduler_Control *scheduler, |
---|
322 | Thread_Control *thread, |
---|
323 | Scheduler_Node *node |
---|
324 | ) |
---|
325 | { |
---|
326 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
327 | |
---|
328 | _Scheduler_SMP_Update_priority( |
---|
329 | context, |
---|
330 | thread, |
---|
331 | node, |
---|
332 | _Scheduler_simple_SMP_Extract_from_ready, |
---|
333 | _Scheduler_simple_SMP_Do_update, |
---|
334 | _Scheduler_simple_SMP_Enqueue_fifo, |
---|
335 | _Scheduler_simple_SMP_Enqueue_lifo, |
---|
336 | _Scheduler_simple_SMP_Enqueue_scheduled_fifo, |
---|
337 | _Scheduler_simple_SMP_Enqueue_scheduled_lifo, |
---|
338 | _Scheduler_simple_SMP_Do_ask_for_help |
---|
339 | ); |
---|
340 | } |
---|
341 | |
---|
342 | bool _Scheduler_simple_SMP_Ask_for_help( |
---|
343 | const Scheduler_Control *scheduler, |
---|
344 | Thread_Control *the_thread, |
---|
345 | Scheduler_Node *node |
---|
346 | ) |
---|
347 | { |
---|
348 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
349 | |
---|
350 | return _Scheduler_simple_SMP_Do_ask_for_help( context, the_thread, node ); |
---|
351 | } |
---|
352 | |
---|
353 | void _Scheduler_simple_SMP_Reconsider_help_request( |
---|
354 | const Scheduler_Control *scheduler, |
---|
355 | Thread_Control *the_thread, |
---|
356 | Scheduler_Node *node |
---|
357 | ) |
---|
358 | { |
---|
359 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
360 | |
---|
361 | _Scheduler_SMP_Reconsider_help_request( |
---|
362 | context, |
---|
363 | the_thread, |
---|
364 | node, |
---|
365 | _Scheduler_simple_SMP_Extract_from_ready |
---|
366 | ); |
---|
367 | } |
---|
368 | |
---|
369 | void _Scheduler_simple_SMP_Withdraw_node( |
---|
370 | const Scheduler_Control *scheduler, |
---|
371 | Thread_Control *the_thread, |
---|
372 | Scheduler_Node *node, |
---|
373 | Thread_Scheduler_state next_state |
---|
374 | ) |
---|
375 | { |
---|
376 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
377 | |
---|
378 | _Scheduler_SMP_Withdraw_node( |
---|
379 | context, |
---|
380 | the_thread, |
---|
381 | node, |
---|
382 | next_state, |
---|
383 | _Scheduler_simple_SMP_Extract_from_ready, |
---|
384 | _Scheduler_simple_SMP_Get_highest_ready, |
---|
385 | _Scheduler_simple_SMP_Move_from_ready_to_scheduled, |
---|
386 | _Scheduler_SMP_Allocate_processor_lazy |
---|
387 | ); |
---|
388 | } |
---|
389 | |
---|
390 | void _Scheduler_simple_SMP_Add_processor( |
---|
391 | const Scheduler_Control *scheduler, |
---|
392 | Thread_Control *idle |
---|
393 | ) |
---|
394 | { |
---|
395 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
396 | |
---|
397 | _Scheduler_SMP_Add_processor( |
---|
398 | context, |
---|
399 | idle, |
---|
400 | _Scheduler_simple_SMP_Has_ready, |
---|
401 | _Scheduler_simple_SMP_Enqueue_scheduled_fifo, |
---|
402 | _Scheduler_SMP_Do_nothing_register_idle |
---|
403 | ); |
---|
404 | } |
---|
405 | |
---|
406 | Thread_Control *_Scheduler_simple_SMP_Remove_processor( |
---|
407 | const Scheduler_Control *scheduler, |
---|
408 | Per_CPU_Control *cpu |
---|
409 | ) |
---|
410 | { |
---|
411 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
412 | |
---|
413 | return _Scheduler_SMP_Remove_processor( |
---|
414 | context, |
---|
415 | cpu, |
---|
416 | _Scheduler_simple_SMP_Extract_from_ready, |
---|
417 | _Scheduler_simple_SMP_Enqueue_fifo |
---|
418 | ); |
---|
419 | } |
---|
420 | |
---|
421 | void _Scheduler_simple_SMP_Yield( |
---|
422 | const Scheduler_Control *scheduler, |
---|
423 | Thread_Control *thread, |
---|
424 | Scheduler_Node *node |
---|
425 | ) |
---|
426 | { |
---|
427 | Scheduler_Context *context = _Scheduler_Get_context( scheduler ); |
---|
428 | |
---|
429 | _Scheduler_SMP_Yield( |
---|
430 | context, |
---|
431 | thread, |
---|
432 | node, |
---|
433 | _Scheduler_simple_SMP_Extract_from_ready, |
---|
434 | _Scheduler_simple_SMP_Enqueue_fifo, |
---|
435 | _Scheduler_simple_SMP_Enqueue_scheduled_fifo |
---|
436 | ); |
---|
437 | } |
---|