FreeCalypso > hg > freecalypso-citrine

annotate gpf/osl/os_pro_ir.c @ 26:51e1a3b213a3

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started re-adding documentation
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Jun 2016 07:01:34 +0000
parents 75a11d740a02
children
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Mychaela Falconia <falcon@freecalypso.org>
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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_pro.obj in frame_na7_db_ir.lib from the Leonardo package.
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4 */
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5
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6 /* set of included headers from COFF symtab: */
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7 #include <stdio.h>
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8 #include <string.h>
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9 #include "gpfconf.h" /* FreeCalypso addition */
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10 #include "../../nucleus/nucleus.h"
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11 #include "typedefs.h"
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12 #include "os.h"
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13 #include "gdi.h"
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14 #include "os_types.h"
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15 #include "os_glob.h"
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16
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17 extern VOID *TCD_Current_Thread;
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18 extern T_OS_TASK_TABLE_ENTRY TaskTable[];
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19 extern unsigned os_time_to_tick_multiplier;
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20
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21 #define OS_NU_TASK_MAGIC 0xdeafbeef
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22
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23 VOID
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24 os_TaskEntry(UNSIGNED TaskHandle, VOID *argv)
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25 {
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26 TaskTable[TaskHandle].TaskEntry(TaskHandle, 0);
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27 }
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28
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29 GLOBAL LONG
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30 os_SuspendTask(OS_HANDLE Caller, ULONG Time)
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31 {
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32 UNSIGNED SuspendTicks;
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33
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34 SuspendTicks = TIME_TO_SYSTEM_TICKS(Time);
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35 if (!SuspendTicks)
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36 SuspendTicks = 1;
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37 NU_Sleep(SuspendTicks);
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38 return (OS_OK);
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39 }
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40
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41 GLOBAL LONG
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42 os_ResumeTask(OS_HANDLE task_handle)
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43 {
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44 if (NU_Resume_Task(&TaskTable[task_handle].TaskCB.TCB) == NU_SUCCESS)
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45 return(OS_OK);
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46 else
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47 return(OS_ERROR);
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48 }
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49
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50 GLOBAL LONG
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51 os_Relinquish(void)
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52 {
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53 NU_Relinquish();
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54 return(OS_OK);
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55 }
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56
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57 GLOBAL OS_HANDLE
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58 os_MyHandle(void)
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59 {
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60 OS_NU_TASK *os_nu_task = (OS_NU_TASK *) TCD_Current_Thread;
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61
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62 if (os_nu_task && os_nu_task->magic_nr == OS_NU_TASK_MAGIC)
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63 return(os_nu_task->handle);
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64 else
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65 return(OS_NOTASK);
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66 }
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67
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68 GLOBAL LONG
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69 os_GetTaskName(OS_HANDLE Caller, OS_HANDLE TaskHandle, char *Name)
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70 {
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71 if (TaskHandle) {
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72 if (TaskHandle > MaxTasks || !TaskTable[TaskHandle].Name[0])
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73 return(OS_ERROR);
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74 strcpy(Name, TaskTable[TaskHandle].Name);
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75 } else if (TCD_Current_Thread) {
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76 NU_TASK *curtask = TCD_Current_Thread;
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77 strcpy(Name, curtask->tc_name);
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78 } else
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79 strcpy(Name, "ROOT");
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80 return(OS_OK);
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81 }
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82
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83 GLOBAL LONG
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84 os_DeferTask(OS_HANDLE task_handle, OS_TIME time)
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85 {
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86 if (NU_Suspend_Task(&TaskTable[task_handle].TaskCB.TCB) == NU_SUCCESS)
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87 return(OS_OK);
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88 else
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89 return(OS_ERROR);
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90 }
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91
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92 GLOBAL LONG
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93 os_CheckTaskStack(OS_HANDLE Handle)
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94 {
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95 register void *sp asm("sp");
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96
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97 if (*TaskTable[Handle].Stack != GUARD_PATTERN)
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98 return(OS_ERROR);
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99 if (TCD_Current_Thread) {
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100 NU_TASK *curtask = TCD_Current_Thread;
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101 if (sp < curtask->tc_stack_start)
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102 return(OS_ERROR);
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103 }
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104 return(OS_OK);
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105 }