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annotate src/gpf/osl/os_tim_fl.c @ 203:ba3693cbd40e

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src/cs: sync with Magnetite
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 29 Jun 2020 00:27:13 +0000
parents 8b2a9a374324
children
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6
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1 /*
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2 * This C module is a reconstruction based on the disassembly of
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3 * os_tim.obj in frame_na7_db_fl.lib from the Leonardo package,
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4 * subsequently reworked by Space Falcon.
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5 */
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6
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7 /* set of included headers from COFF symtab: */
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8 #include <stdio.h>
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9 #include "nucleus.h"
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10 #include "typedefs.h"
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11 #include "os.h"
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12 #include "gdi.h"
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13 #include "os_types.h"
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14 #include "os_glob.h"
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15
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16 extern UNSIGNED TMD_Timer;
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17 extern INT TMD_Timer_State;
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18
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19 extern T_OS_TIMER_ENTRY TimerTable[];
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20 extern T_OS_TIMER_TABLE_ENTRY *p_list[];
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21
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22 extern void os_Timeout(UNSIGNED t_handle);
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23 extern void timer_error(int err);
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24
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25 unsigned os_time_to_tick_multiplier = TIME_TO_TICK_TDMA_FRAME_MULTIPLIER;
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26 unsigned os_tick_to_time_multiplier = TICK_TO_TIME_TDMA_FRAME_MULTIPLIER;
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27
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28 unsigned volatile t_start_ticks;
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29 T_OS_TIMER_TABLE_ENTRY *t_running;
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30 int used_timers;
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31 int next_t_handle;
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32 int volatile t_list_access;
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33 int max_used_timers;
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34 NU_SEMAPHORE TimSemCB;
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35 NU_TIMER os_timer_cb;
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36
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37 #ifdef __GNUC__
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38 #define BARRIER asm volatile ("": : :"memory")
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39 #else
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40 #define BARRIER /* prayer */
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41 #endif
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42
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43 GLOBAL LONG
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44 os_set_tick(int os_system_tick)
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45 {
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46 switch (os_system_tick) {
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47 case SYSTEM_TICK_TDMA_FRAME:
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48 os_time_to_tick_multiplier = TIME_TO_TICK_TDMA_FRAME_MULTIPLIER;
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49 os_tick_to_time_multiplier = TICK_TO_TIME_TDMA_FRAME_MULTIPLIER;
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50 return(OS_OK);
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51 case SYSTEM_TICK_10_MS:
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52 os_time_to_tick_multiplier = TIME_TO_TICK_10MS_MULTIPLIER;
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53 os_tick_to_time_multiplier = TICK_TO_TIME_10MS_MULTIPLIER;
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54 return(OS_OK);
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55 default:
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56 return(OS_ERROR);
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57 }
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58 }
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59
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60 GLOBAL LONG
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61 os_TimerInformation(USHORT Index, char *Buffer)
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62 {
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63 static int t_info_read;
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64
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65 if (t_info_read) {
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66 t_info_read = 0;
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67 return(OS_ERROR);
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68 }
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69 sprintf(Buffer, "Maximum %d of %d available timers running",
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70 max_used_timers, MaxSimultaneousTimer);
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71 t_info_read = 1;
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72 return(OS_OK);
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73 }
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74
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75 GLOBAL LONG
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76 os_TimInit(void)
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77 {
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78 int i;
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79
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80 if (NU_Create_Semaphore(&TimSemCB, "TIMSEM", 1, NU_PRIORITY)
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81 != NU_SUCCESS)
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82 return(OS_ERROR);
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83 if (NU_Create_Timer(&os_timer_cb, "OS_TIMER", os_Timeout, 0, 1, 0,
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84 NU_DISABLE_TIMER) != NU_SUCCESS)
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85 return(OS_ERROR);
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86 used_timers = 0;
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87 max_used_timers = 0;
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88 next_t_handle = 1;
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89 t_list_access = 0;
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90 t_start_ticks = 0;
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91 p_list[0] = 0;
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92 for (i = 1; i < MaxSimultaneousTimer; i++) {
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93 TimerTable[i].entry.status = TMR_FREE;
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94 TimerTable[i].entry.next = 0;
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95 TimerTable[i].entry.prev = 0;
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96 TimerTable[i].next_t_handle = i + 1;
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97 p_list[i] = 0;
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98 }
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99 TimerTable[MaxSimultaneousTimer].entry.status = TMR_FREE;
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100 TimerTable[MaxSimultaneousTimer].next_t_handle = 0;
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101 t_running = 0;
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102 return(OS_OK);
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103 }
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104
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105 GLOBAL LONG
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106 os_RecoverTick(OS_TICK ticks)
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107 {
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108 UNSIGNED current_system_clock;
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109
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110 current_system_clock = NU_Retrieve_Clock();
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111 NU_Set_Clock(current_system_clock + ticks);
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112 if (TMD_Timer_State == TM_ACTIVE) {
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113 if (TMD_Timer <= ticks) {
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114 TMD_Timer_State = TM_EXPIRED;
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115 TMD_Timer = 0;
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116 } else
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117 TMD_Timer -= ticks;
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118 }
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119 return(OS_OK);
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120 }
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121
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122 GLOBAL LONG
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123 os_QueryTimer(OS_HANDLE TaskHandle, OS_HANDLE TimerHandle,
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124 OS_TIME *RemainingTime)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 {
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 T_OS_TIMER_TABLE_ENTRY *timer, *t_iter;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 OS_TICK c_ticks, r_ticks, e_ticks;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 STATUS sts;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 if (TimerHandle > MaxSimultaneousTimer)
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 return(OS_ERROR);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 sts = NU_Obtain_Semaphore(&TimSemCB, NU_SUSPEND);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 timer = &TimerTable[TimerHandle].entry;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 if (timer->status == TMR_FREE) {
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 if (sts == NU_SUCCESS)
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 NU_Release_Semaphore(&TimSemCB);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 return(OS_ERROR);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 }
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 t_list_access = 1;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 BARRIER;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 if (!t_running) {
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 r_ticks = 0;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 goto out;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 }
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 c_ticks = NU_Retrieve_Clock();
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 e_ticks = c_ticks - t_start_ticks;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 t_iter = t_running;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 if (t_iter->r_ticks >= e_ticks)
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 r_ticks = t_iter->r_ticks - e_ticks;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 else
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 r_ticks = 0;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 while (t_iter != timer) {
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 t_iter = t_iter->next;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 if (t_iter == t_running) {
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 r_ticks = 0;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 goto out;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 }
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 r_ticks += t_iter->r_ticks;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 }
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 out: BARRIER;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 t_list_access = 0;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 if (sts == NU_SUCCESS)
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 NU_Release_Semaphore(&TimSemCB);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 *RemainingTime = SYSTEM_TICKS_TO_TIME(r_ticks);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 return(OS_OK);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 }
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 GLOBAL LONG
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 os_InactivityTicks(int *next_event, OS_TICK *next_event_ticks)
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 {
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 *next_event = 1;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 switch (TMD_Timer_State) {
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 case TM_ACTIVE:
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 *next_event_ticks = TMD_Timer;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 return(OS_OK);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 case TM_NOT_ACTIVE:
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 *next_event_ticks = 0;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 *next_event = 0;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 return(OS_OK);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 default:
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 *next_event_ticks = 0;
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 return(OS_OK);
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 }
8b2a9a374324 src/gpf: addition of Magnetite src/gpf2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 }