[ac7d5ef0] | 1 | /* |
---|
| 2 | * Clock Manager |
---|
| 3 | * |
---|
[03f2154e] | 4 | * COPYRIGHT (c) 1989-1997. |
---|
[ac7d5ef0] | 5 | * On-Line Applications Research Corporation (OAR). |
---|
[03f2154e] | 6 | * Copyright assigned to U.S. Government, 1994. |
---|
[ac7d5ef0] | 7 | * |
---|
[03f2154e] | 8 | * The license and distribution terms for this file may in |
---|
| 9 | * the file LICENSE in this distribution or at |
---|
| 10 | * http://www.OARcorp.com/rtems/license.html. |
---|
[ac7d5ef0] | 11 | * |
---|
| 12 | * $Id$ |
---|
| 13 | */ |
---|
| 14 | |
---|
| 15 | #include <rtems/system.h> |
---|
[3a4ae6c] | 16 | #include <rtems/rtems/status.h> |
---|
| 17 | #include <rtems/rtems/clock.h> |
---|
[5e9b32b] | 18 | #include <rtems/score/isr.h> |
---|
| 19 | #include <rtems/score/thread.h> |
---|
| 20 | #include <rtems/score/tod.h> |
---|
| 21 | #include <rtems/score/watchdog.h> |
---|
[ac7d5ef0] | 22 | |
---|
| 23 | /*PAGE |
---|
| 24 | * |
---|
| 25 | * rtems_clock_get |
---|
| 26 | * |
---|
| 27 | * This directive returns the current date and time. If the time has |
---|
| 28 | * not been set by a tm_set then an error is returned. |
---|
| 29 | * |
---|
| 30 | * Input parameters: |
---|
| 31 | * option - which value to return |
---|
| 32 | * time_buffer - pointer to output buffer (a time and date structure |
---|
| 33 | * or an interval) |
---|
| 34 | * |
---|
| 35 | * Output parameters: |
---|
| 36 | * time_buffer - output filled in |
---|
| 37 | * RTEMS_SUCCESSFUL - if successful |
---|
| 38 | * error code - if unsuccessful |
---|
| 39 | */ |
---|
| 40 | |
---|
| 41 | rtems_status_code rtems_clock_get( |
---|
| 42 | rtems_clock_get_options option, |
---|
| 43 | void *time_buffer |
---|
| 44 | ) |
---|
| 45 | { |
---|
| 46 | ISR_Level level; |
---|
| 47 | rtems_interval tmp; |
---|
| 48 | |
---|
| 49 | switch ( option ) { |
---|
| 50 | case RTEMS_CLOCK_GET_TOD: |
---|
[7fea679b] | 51 | if ( !_TOD_Is_set ) |
---|
[3a4ae6c] | 52 | return RTEMS_NOT_DEFINED; |
---|
[ac7d5ef0] | 53 | |
---|
| 54 | *(rtems_time_of_day *)time_buffer = _TOD_Current; |
---|
[3a4ae6c] | 55 | return RTEMS_SUCCESSFUL; |
---|
[ac7d5ef0] | 56 | |
---|
| 57 | case RTEMS_CLOCK_GET_SECONDS_SINCE_EPOCH: |
---|
[7fea679b] | 58 | if ( !_TOD_Is_set ) |
---|
[3a4ae6c] | 59 | return RTEMS_NOT_DEFINED; |
---|
[ac7d5ef0] | 60 | |
---|
| 61 | *(rtems_interval *)time_buffer = _TOD_Seconds_since_epoch; |
---|
[3a4ae6c] | 62 | return RTEMS_SUCCESSFUL; |
---|
[ac7d5ef0] | 63 | |
---|
| 64 | case RTEMS_CLOCK_GET_TICKS_SINCE_BOOT: |
---|
[5e7b6272] | 65 | *(rtems_interval *)time_buffer = _Watchdog_Ticks_since_boot; |
---|
[3a4ae6c] | 66 | return RTEMS_SUCCESSFUL; |
---|
[ac7d5ef0] | 67 | |
---|
| 68 | case RTEMS_CLOCK_GET_TICKS_PER_SECOND: |
---|
| 69 | *(rtems_interval *)time_buffer = _TOD_Ticks_per_second; |
---|
[3a4ae6c] | 70 | return RTEMS_SUCCESSFUL; |
---|
[ac7d5ef0] | 71 | |
---|
| 72 | case RTEMS_CLOCK_GET_TIME_VALUE: |
---|
[7fea679b] | 73 | if ( !_TOD_Is_set ) |
---|
[3a4ae6c] | 74 | return RTEMS_NOT_DEFINED; |
---|
[ac7d5ef0] | 75 | |
---|
| 76 | _ISR_Disable( level ); |
---|
| 77 | ((rtems_clock_time_value *)time_buffer)->seconds = |
---|
| 78 | _TOD_Seconds_since_epoch; |
---|
| 79 | tmp = _TOD_Current.ticks; |
---|
| 80 | _ISR_Enable( level ); |
---|
| 81 | |
---|
[3a4ae6c] | 82 | tmp *= _TOD_Microseconds_per_tick; |
---|
[ac7d5ef0] | 83 | ((rtems_clock_time_value *)time_buffer)->microseconds = tmp; |
---|
| 84 | |
---|
[3a4ae6c] | 85 | return RTEMS_SUCCESSFUL; |
---|
[ac7d5ef0] | 86 | } |
---|
| 87 | |
---|
[3a4ae6c] | 88 | return RTEMS_INTERNAL_ERROR; /* should never get here */ |
---|
[ac7d5ef0] | 89 | |
---|
| 90 | } |
---|
| 91 | |
---|
| 92 | /*PAGE |
---|
| 93 | * |
---|
| 94 | * rtems_clock_set |
---|
| 95 | * |
---|
| 96 | * This directive sets the date and time for this node. |
---|
| 97 | * |
---|
| 98 | * Input parameters: |
---|
| 99 | * time_buffer - pointer to the time and date structure |
---|
| 100 | * |
---|
| 101 | * Output parameters: |
---|
| 102 | * RTEMS_SUCCESSFUL - if successful |
---|
| 103 | * error code - if unsuccessful |
---|
| 104 | */ |
---|
| 105 | |
---|
| 106 | rtems_status_code rtems_clock_set( |
---|
| 107 | rtems_time_of_day *time_buffer |
---|
| 108 | ) |
---|
| 109 | { |
---|
[3a4ae6c] | 110 | rtems_interval seconds; |
---|
[ac7d5ef0] | 111 | |
---|
[3a4ae6c] | 112 | if ( _TOD_Validate( time_buffer ) ) { |
---|
[ac7d5ef0] | 113 | seconds = _TOD_To_seconds( time_buffer ); |
---|
| 114 | _Thread_Disable_dispatch(); |
---|
| 115 | _TOD_Set( time_buffer, seconds ); |
---|
| 116 | _Thread_Enable_dispatch(); |
---|
[3a4ae6c] | 117 | return RTEMS_SUCCESSFUL; |
---|
[ac7d5ef0] | 118 | } |
---|
[3a4ae6c] | 119 | return RTEMS_INVALID_CLOCK; |
---|
[ac7d5ef0] | 120 | } |
---|
| 121 | |
---|
| 122 | /*PAGE |
---|
| 123 | * |
---|
| 124 | * rtems_clock_tick |
---|
| 125 | * |
---|
| 126 | * This directive notifies the executve that a tick has occurred. |
---|
| 127 | * When the tick occurs the time manager updates and maintains |
---|
| 128 | * the calendar time, timeslicing, and any timeout delays. |
---|
| 129 | * |
---|
| 130 | * Input parameters: NONE |
---|
| 131 | * |
---|
| 132 | * Output parameters: |
---|
| 133 | * RTEMS_SUCCESSFUL - always succeeds |
---|
| 134 | * |
---|
| 135 | * NOTE: This routine only works for leap-years through 2099. |
---|
| 136 | */ |
---|
| 137 | |
---|
| 138 | rtems_status_code rtems_clock_tick( void ) |
---|
| 139 | { |
---|
| 140 | _TOD_Tickle_ticks(); |
---|
| 141 | |
---|
| 142 | _Watchdog_Tickle_ticks(); |
---|
| 143 | |
---|
| 144 | _Thread_Tickle_timeslice(); |
---|
| 145 | |
---|
| 146 | if ( _Thread_Is_context_switch_necessary() && |
---|
| 147 | _Thread_Is_dispatching_enabled() ) |
---|
| 148 | _Thread_Dispatch(); |
---|
| 149 | |
---|
[3a4ae6c] | 150 | return RTEMS_SUCCESSFUL; |
---|
[ac7d5ef0] | 151 | } |
---|