5
Last change
on this file since fce900b5 was
9a1bab2,
checked in by Sebastian Huber <sebastian.huber@…>, on 06/05/14 at 09:19:32
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score: _Per_CPU_State_wait_for_non_initial_state()
Replace _Per_CPU_State_wait_for_ready_to_start_multitasking() with
_Per_CPU_State_wait_for_non_initial_state(). Implement this function.
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-
Property mode set to
100644
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File size:
1.3 KB
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1 | /* |
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2 | * Copyright (c) 2014 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Dornierstr. 4 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <rtems@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.org/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #if HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems/score/percpu.h> |
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20 | #include <rtems/counter.h> |
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21 | |
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22 | bool _Per_CPU_State_wait_for_non_initial_state( |
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23 | uint32_t cpu_index, |
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24 | uint32_t timeout_in_ns |
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25 | ) |
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26 | { |
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27 | const Per_CPU_Control *cpu = _Per_CPU_Get_by_index( cpu_index ); |
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28 | Per_CPU_State state = cpu->state; |
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29 | |
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30 | if ( timeout_in_ns > 0 ) { |
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31 | rtems_counter_ticks ticks = |
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32 | rtems_counter_nanoseconds_to_ticks( timeout_in_ns ); |
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33 | rtems_counter_ticks a = rtems_counter_read(); |
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34 | rtems_counter_ticks delta = 0; |
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35 | |
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36 | while ( ticks > delta && state == PER_CPU_STATE_INITIAL ) { |
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37 | rtems_counter_ticks b; |
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38 | |
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39 | _CPU_SMP_Processor_event_receive(); |
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40 | state = cpu->state; |
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41 | |
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42 | ticks -= delta; |
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43 | |
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44 | b = rtems_counter_read(); |
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45 | delta = rtems_counter_difference( b, a ); |
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46 | a = b; |
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47 | } |
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48 | } else { |
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49 | while ( state == PER_CPU_STATE_INITIAL ) { |
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50 | _CPU_SMP_Processor_event_receive(); |
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51 | state = cpu->state; |
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52 | } |
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53 | } |
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54 | |
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55 | return state != PER_CPU_STATE_INITIAL; |
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56 | } |
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