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annotate src/nucleus/tcd.c @ 5:3b367f330821

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components: pruned import from Selenite
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 15 May 2020 02:20:23 +0000
parents 92470e5d0b9e
children
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1 /*************************************************************************/
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2 /* */
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3 /* Copyright Mentor Graphics Corporation 2002 */
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4 /* All Rights Reserved. */
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5 /* */
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6 /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */
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7 /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */
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8 /* SUBJECT TO LICENSE TERMS. */
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9 /* */
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10 /*************************************************************************/
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11
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12 /*************************************************************************/
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13 /* */
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14 /* FILE NAME VERSION */
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15 /* */
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16 /* tcd.c Nucleus PLUS 1.14 */
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17 /* */
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18 /* COMPONENT */
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19 /* */
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20 /* TC - Thread Control */
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21 /* */
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22 /* DESCRIPTION */
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23 /* */
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24 /* This file contains global data structures for use within this */
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25 /* component. */
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26 /* */
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27 /* DATA STRUCTURES */
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28 /* */
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29 /* TCD_Created_Tasks_List Pointer to the linked-list */
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30 /* of created tasks */
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31 /* TCD_Total_Tasks Total number of created tasks*/
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32 /* TCD_Priority_List Array of pointers to ready */
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33 /* tasks, indexed by priority */
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34 /* TCD_Execute_Task Highest priority task to */
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35 /* execute */
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36 /* TCD_Priority_Groups Bit map of 32 groups of task */
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37 /* priority */
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38 /* TCD_Sub_Priority_Groups An array of 32 sub-priority */
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39 /* groups */
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40 /* TCD_Lowest_Set_Bit Lookup table to find the */
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41 /* lowest bit set in a byte */
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42 /* TCD_Highest_Priority Highest priority ready */
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43 /* TCD_Created_HISRs_List Pointer to the linked-list */
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44 /* of created HISRs */
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45 /* TCD_Total_HISRs Total number of created HISRs*/
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46 /* TCD_Active_HISR_Heads Active HISR list head ptrs */
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47 /* TCD_Active_HISR_Tails Active HISR list tail ptrs */
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48 /* TCD_Execute_HISR Highest priority HISR to */
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49 /* execute */
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50 /* TCD_Current_Thread Pointer to the currently */
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51 /* executing thread */
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52 /* TCD_Registered_LISRs List of registered LISRs */
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53 /* TCD_LISR_Pointers Actual LISR pointers */
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54 /* TCD_Interrupt_Count Count of ISRs in progress */
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55 /* TCD_Stack_Switched Flag indicating that stack */
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56 /* was switched in an ISR */
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57 /* TCD_List_Protect Task list protection */
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58 /* TCD_System_Protect System protection */
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59 /* TCD_System_Stack System stack pointer - top */
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60 /* TCD_LISR_Protect Protect LISR registration */
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61 /* TCD_HISR_Protect Protect the list of created */
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62 /* HISRs */
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63 /* TCD_Interrupt_Level Enable interrupt level */
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64 /* TCD_Unhandled_Interrupt Contains the most recent */
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65 /* unhandled interrupt in */
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66 /* system error conditions */
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67 /* */
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68 /* FUNCTIONS */
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69 /* */
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70 /* None */
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71 /* */
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72 /* DEPENDENCIES */
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73 /* */
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74 /* cs_defs.h Common Service constants */
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75 /* tc_defs.h Thread Control constants */
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76 /* */
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77 /* HISTORY */
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78 /* */
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79 /* DATE REMARKS */
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80 /* */
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81 /* 03-01-1993 Created initial version 1.0 */
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82 /* 04-19-1993 Verified version 1.0 */
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83 /* 01-01-1993 Added variable to save last */
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84 /* unhandled interrupt in system */
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85 /* error conditions, resulting in */
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86 /* version 1.0a */
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87 /* 11-01-1993 Verified version 1.0a */
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88 /* 03-01-1994 Change schedule protection to a */
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89 /* system protection to improve */
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90 /* performance, resulting in */
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91 /* version 1.1 */
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92 /* */
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93 /* 03-18-1994 Verified version 1.1 */
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94 /* 04-17-1996 updated to version 1.2 */
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95 /* 03-24-1998 Released version 1.3. */
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96 /* 03-26-1999 Released 1.11m (new release */
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97 /* numbering scheme) */
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98 /* 04-23-2001 Made TCD_LISR_Pointers array an exclusive count */
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99 /* 04-17-2002 Released version 1.13m */
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100 /* 11-07-2002 Released version 1.14 */
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101 /*************************************************************************/
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102 #define NU_SOURCE_FILE
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103
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104 #include "cs_defs.h" /* Common Service constants */
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105 #include "tc_defs.h" /* Thread Control constants */
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106
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107
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108 /* TCD_Created_Tasks_List is the head pointer of the linked list of
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109 created tasks. If the list is NU_NULL, there are no tasks created. */
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110
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111 CS_NODE *TCD_Created_Tasks_List;
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112
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113
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114 /* TCD_Total_Tasks contains the number of currently created tasks. */
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115
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116 UNSIGNED TCD_Total_Tasks;
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117
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118
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119 /* TCD_Priority_List is an array of TCB pointers. Each element of the array
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120 is effectively the head pointer of the list of tasks ready for execution
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121 at that priority. If the pointer is NULL, there are no tasks ready
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122 for execution at that priority. The array is indexed by priority. */
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123
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124 TC_TCB *TCD_Priority_List[TC_PRIORITIES];
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125
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126
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127 /* TCD_Priority_Groups is a 32-bit unsigned integer that is used as a bit
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128 map. Each bit corresponds to an 8-priority group. For example, if bit 0
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129 is set, at least one task of priority 0 through 8 is ready for execution. */
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130
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131 UNSIGNED TCD_Priority_Groups;
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132
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133
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134 /* TCD_Sub_Priority_Groups is an array of sub-priority groups. These are
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 also used as bit maps. Index 0 of this array corresponds to priorities
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 0 through 8. Bit 0 of this element represents priority 0, while bit 7
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 represents priority 7. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 DATA_ELEMENT TCD_Sub_Priority_Groups[TC_MAX_GROUPS];
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 /* TCD_Lowest_Set_Bit is nothing more than a standard lookup table. The
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 table is indexed by values ranging from 1 to 255. The value at that
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 position in the table indicates the number of the lowest set bit. This is
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 used to determine the highest priority task represented in the previously
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 defined bit maps. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 UNSIGNED_CHAR TCD_Lowest_Set_Bit[] = {0,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 1, 0, 7, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1,
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 0, 2, 0, 1, 0};
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 /* TCD_Highest_Priority contains the highest priority task ready for execution.
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 Note that this does not necessarily represent the priority of the currently
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 executing task. This is true if the currently executing task has preemption
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 disabled. If no tasks are executing, this variable is set to the maximum
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 priority. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 INT TCD_Highest_Priority;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 /* TCD_Execute_Task is a pointer to the task to execute. Note that this
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 pointer does not necessarily point to the currently executing task. There
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 are several points in the system where this is true. One situation is
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 when preemption is about to take place. Another situation can result from
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 a internal protection conflict. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 TC_TCB *TCD_Execute_Task;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 /* TCD_Created_HISRs_List is the head pointer of the list of created High-
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 Level Interrupt Service Routines (HISR). If this pointer is NU_NULL, there
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 are no HISRs currently created. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 CS_NODE *TCD_Created_HISRs_List;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 /* TCD_Total_HISRs contains the number of currently created HISRs. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 UNSIGNED TCD_Total_HISRs;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 /* TCD_Active_HISR_Heads is an array of active HISR list head pointers.
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 There are three HISR priorities available. The HISR priority is an index
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 into this table. Priority/index 0 represents the highest priority. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 TC_HCB *TCD_Active_HISR_Heads[TC_HISR_PRIORITIES];
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 /* TCD_Active_HISR_Tails is an array of active HISR list tail pointers.
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 There are three HISR priorities available. The HISR priority is an index
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 into this table. Priority/index 0 represents the highest priority. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 TC_HCB *TCD_Active_HISR_Tails[TC_HISR_PRIORITIES];
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 /* TCD_Execute_HISR contains a pointer to the highest priority HISR to execute.
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 If this pointer is NU_NULL, no HISRs are currently activated. Note that
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 the current thread pointer is not always equal to this pointer. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 TC_HCB *TCD_Execute_HISR;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 /* TCD_Current_Thread points to the control block of the currently executing
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 thread of execution. Therefore, this variable points at either a TC_TCB
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 or a TC_HCB structure. Except for initialization, this variable is set
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 and cleared in the target dependent portion of this component. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 VOID *TCD_Current_Thread;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 /* TCD_System_Stack contains the system stack base pointer. When the system
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 is idle or in interrupt processing the system stack pointer is used. This
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 variable is usually setup during target dependent initialization. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 VOID *TCD_System_Stack;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 /* TCD_Registered_LISRs is a list that specifies whether or not a
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 LISR is registered for a given interrupt vector. If the value in the
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 list indexed by the vector is non-zero, then that value can be used
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 as the index into the list of LISR pointers to find the actual registered
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 LISR. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 UNSIGNED_CHAR TCD_Registered_LISRs[NU_MAX_VECTORS+1];
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 /* TCD_LISR_Pointers is a list of LISR pointers that indicate the LISR function
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 to call when the interrupt occurs. If the entry is NULL, it is
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 available. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 VOID (*TCD_LISR_Pointers[NU_MAX_LISRS+1])(INT vector);
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 /* TCD_Interrupt_Count contains the number of Interrupt Service Routines (ISRs)
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 currently in progress. If the contents of this variable is zero, then no
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 interrupts are in progress. If the contents are greater than 1, nested
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 interrupts are being processed. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 INT TCD_Interrupt_Count;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 /* TCD_Stack_Switched contains a flag indicating that the system stack was
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 switched to after the thread's context was saved. This variable is not
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 used in all ports. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 INT TCD_Stack_Switched;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 /* TCD_List_Protect is a structure that is used to protect against multiple
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 access to the list of established tasks. */
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 TC_PROTECT TCD_List_Protect;
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263
92470e5d0b9e src: partial import from FC Selenite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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264
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265 /* TCD_System_Protect is a structure that is used to provide protection
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266 against multiple threads accessing the same system structures at the
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267 same time. */
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268
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269 TC_PROTECT TCD_System_Protect;
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270
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271
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272 /* TCD_LISR_Protect is a structure that is used to provide protection against
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273 multiple threads accessing the LISR registration structures at the same
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274 time. */
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275
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276 TC_PROTECT TCD_LISR_Protect;
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277
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278
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279 /* TCD_HISR_Protect is a structure that is used to provide protection against
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280 multiple threads accessing the created HISR linked-list at the same time. */
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281
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282 TC_PROTECT TCD_HISR_Protect;
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283
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284
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285 /* TCD_Interrupt_Level is a variable that contains the enabled interrupt
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286 level. If the target processor does not have multiple enable interrupt
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287 levels, this variable is a boolean. */
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288
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289 INT TCD_Interrupt_Level;
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290
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291
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292 /* TCD_Unhandled_Interrupt is a variable that contains the last unhandled
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293 interrupt in system error conditions. */
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294
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295 INT TCD_Unhandled_Interrupt;
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296
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297
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298
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299
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300