1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup ScoreCpuset |
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5 | * |
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6 | * @brief Routines to Control a CPU Set. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * COPYRIGHT (c) 2014. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.org/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #if HAVE_CONFIG_H |
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19 | #include "config.h" |
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20 | #endif |
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21 | |
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22 | #ifdef __RTEMS_HAVE_SYS_CPUSET_H__ |
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23 | #include <sys/cpuset.h> |
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24 | #include <rtems/score/cpusetimpl.h> |
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25 | #include <rtems/score/assert.h> |
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26 | #include <rtems/score/percpu.h> |
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27 | |
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28 | static CPU_set_Control cpuset_default; |
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29 | |
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30 | /* |
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31 | * _CPU_set_Handler_initialization |
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32 | */ |
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33 | void _CPU_set_Handler_initialization() |
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34 | { |
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35 | int i; |
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36 | int max_cpus; |
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37 | |
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38 | /* We do not support a cpu count over CPU_SETSIZE */ |
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39 | max_cpus = _SMP_Get_processor_count(); |
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40 | |
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41 | /* This should never happen */ |
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42 | _Assert( max_cpus <= CPU_SETSIZE ); |
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43 | |
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44 | /* Initialize the affinity to be the set of all available CPU's */ |
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45 | cpuset_default.set = &cpuset_default.preallocated; |
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46 | cpuset_default.setsize = sizeof( *cpuset_default.set ); |
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47 | CPU_ZERO_S( cpuset_default.setsize, &cpuset_default.preallocated ); |
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48 | |
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49 | for (i=0; i<max_cpus; i++) |
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50 | CPU_SET_S(i, cpuset_default.setsize, cpuset_default.set ); |
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51 | } |
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52 | |
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53 | /** |
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54 | * _CPU_set_Is_valid |
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55 | * |
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56 | * This routine validates a cpuset size corresponds to |
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57 | * the system correct size, that at least one |
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58 | * valid cpu is set and that no invalid cpus are set. |
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59 | */ |
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60 | int _CPU_set_Is_valid( const cpu_set_t *cpuset, size_t setsize ) |
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61 | { |
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62 | cpu_set_t temp; |
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63 | |
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64 | if ( !cpuset ) |
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65 | return -1; |
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66 | |
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67 | if (setsize != cpuset_default.setsize ) |
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68 | return -1; |
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69 | |
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70 | /* Validate at least 1 valid cpu is set in cpuset */ |
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71 | CPU_AND_S( cpuset_default.setsize, &temp, cpuset, cpuset_default.set ); |
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72 | |
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73 | if ( CPU_COUNT_S( setsize, &temp ) == 0 ) |
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74 | return -1; |
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75 | |
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76 | /* Validate that no invalid cpu's are set in cpuset */ |
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77 | if ( !CPU_EQUAL_S( setsize, &temp, cpuset ) ) |
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78 | return -1; |
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79 | |
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80 | return 0; |
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81 | } |
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82 | |
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83 | /** |
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84 | * _CPU_set_Default |
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85 | * |
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86 | * This routine returns the default cpuset. |
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87 | */ |
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88 | const CPU_set_Control *_CPU_set_Default() |
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89 | { |
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90 | return &cpuset_default; |
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91 | } |
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92 | #endif |
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93 | |
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94 | |
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