FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/nucleus/ioc.c @ 484:c617a6adcb69
top level README: status update
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Sun, 29 Jun 2014 19:05:52 +0000 |
parents | afceeeb2cba1 |
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rev | line source |
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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 /* ioc.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 /* IO - Input/Output Driver Management */ |
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21 /* */ |
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22 /* DESCRIPTION */ |
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23 /* */ |
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24 /* This file contains the core routines for the I/O Driver */ |
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25 /* Management component. */ |
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26 /* */ |
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27 /* DATA STRUCTURES */ |
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28 /* */ |
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29 /* None */ |
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30 /* */ |
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31 /* FUNCTIONS */ |
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32 /* */ |
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33 /* IOC_Create_Driver Create an I/O driver */ |
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34 /* IOC_Delete_Driver Delete an I/O driver */ |
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35 /* IOC_Request_Driver Make an I/O driver request */ |
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36 /* IOC_Resume_Driver Resume a task suspended in */ |
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37 /* an I/O driver */ |
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38 /* IOC_Suspend_Driver Suspend a task inside an I/O */ |
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39 /* driver */ |
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40 /* */ |
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41 /* DEPENDENCIES */ |
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42 /* */ |
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43 /* cs_extr.h Common Service functions */ |
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44 /* tc_extr.h Thread Control functions */ |
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45 /* io_extr.h I/O driver functions */ |
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46 /* hi_extr.h History functions */ |
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47 /* */ |
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48 /* HISTORY */ |
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49 /* */ |
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50 /* DATE REMARKS */ |
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51 /* */ |
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52 /* 03-01-1993 Created initial version 1.0 */ |
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53 /* 04-19-1993 Verified version 1.0 */ |
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54 /* 08-09-1993 Corrected pointer retrieval */ |
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55 /* loop, resulting in version 1.0a */ |
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56 /* 08-09-1993 Verified version 1.0a */ |
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57 /* 03-01-1994 Moved non-core functions into */ |
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58 /* supplemental files, changed */ |
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59 /* function interfaces to match */ |
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60 /* those in prototype, changed */ |
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61 /* protection logic to reduce */ |
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62 /* overhead, resulting in */ |
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63 /* version 1.1 */ |
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64 /* */ |
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65 /* 03-15-1994 Verified version 1.1 */ |
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66 /* 04-17-1996 updated to version 1.2 */ |
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67 /* 04-23-1996 Corrected SPR121. */ |
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68 /* 03-24-1998 Released version 1.3 */ |
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69 /* 03-26-1999 Released 1.11m (new release */ |
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70 /* numbering scheme) */ |
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71 /* 04-07-1999 Release 1.11mA */ |
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72 /* 04-17-2002 Released version 1.13m */ |
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73 /* 11-07-2002 Released version 1.14 */ |
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74 /*************************************************************************/ |
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75 #define NU_SOURCE_FILE |
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76 |
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77 |
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78 #include "cs_extr.h" /* Common service functions */ |
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79 #include "tc_extr.h" /* Thread control functions */ |
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80 #include "io_extr.h" /* I/O driver functions */ |
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81 #include "hi_extr.h" /* History functions */ |
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82 #include "profiler.h" /* ProView interface */ |
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83 |
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84 /* Define external inner-component global data references. */ |
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85 |
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86 extern CS_NODE *IOD_Created_Drivers_List; |
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87 extern UNSIGNED IOD_Total_Drivers; |
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88 extern TC_PROTECT IOD_List_Protect; |
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89 |
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90 |
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91 |
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92 /*************************************************************************/ |
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93 /* */ |
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94 /* FUNCTION */ |
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95 /* */ |
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96 /* IOC_Create_Driver */ |
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97 /* */ |
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98 /* DESCRIPTION */ |
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99 /* */ |
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100 /* This function creates an I/O driver and places it on the list of */ |
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101 /* created I/O drivers. Note that this function does not actually */ |
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102 /* invoke the driver. */ |
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103 /* */ |
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104 /* CALLED BY */ |
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105 /* */ |
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106 /* Application */ |
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107 /* IOCE_Create_Driver Error checking shell */ |
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108 /* */ |
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109 /* CALLS */ |
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110 /* */ |
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111 /* CSC_Place_On_List Add node to linked-list */ |
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112 /* [HIC_Make_History_Entry] Make entry in history log */ |
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113 /* [TCT_Check_Stack] Stack checking function */ |
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114 /* TCT_Protect Data structure protect */ |
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115 /* TCT_Unprotect Un-protect data structure */ |
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116 /* */ |
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117 /* INPUTS */ |
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118 /* */ |
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119 /* driver Driver control block pointer */ |
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120 /* name Driver's logical name */ |
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121 /* driver_entry Driver's point of entry */ |
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122 /* */ |
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123 /* OUTPUTS */ |
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124 /* */ |
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125 /* NU_SUCCESS */ |
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126 /* */ |
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127 /* HISTORY */ |
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128 /* */ |
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129 /* DATE REMARKS */ |
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130 /* */ |
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131 /* 03-01-1993 Created initial version 1.0 */ |
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132 /* 04-19-1993 Verified version 1.0 */ |
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133 /* */ |
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134 /*************************************************************************/ |
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135 STATUS IOC_Create_Driver(NU_DRIVER *driver, CHAR *name, |
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136 VOID (*driver_entry)(NU_DRIVER *, NU_DRIVER_REQUEST *)) |
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137 { |
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138 |
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139 INT i; /* Working index variable */ |
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140 NU_SUPERV_USER_VARIABLES |
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141 |
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142 /* Switch to supervisor mode */ |
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143 NU_SUPERVISOR_MODE(); |
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144 |
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145 #ifdef NU_ENABLE_STACK_CHECK |
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146 |
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147 /* Call stack checking function to check for an overflow condition. */ |
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148 TCT_Check_Stack(); |
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149 |
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150 #endif |
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151 |
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152 #ifdef NU_ENABLE_HISTORY |
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153 |
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154 /* Make an entry that corresponds to this function in the system history |
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155 log. */ |
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156 HIC_Make_History_Entry(NU_CREATE_DRIVER_ID, (UNSIGNED) driver, |
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157 (UNSIGNED) name, (UNSIGNED) driver_entry); |
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158 |
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159 #endif |
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160 |
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161 /* First, clear the driver ID just in case it is an old Driver |
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162 Control Block. */ |
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163 driver -> nu_driver_id = 0; |
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164 |
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165 /* Fill in the driver's name. */ |
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166 for (i = 0; i < NU_MAX_NAME; i++) |
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167 driver -> nu_driver_name[i] = name[i]; |
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168 |
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169 /* Save the driver's entry function in the control block. */ |
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170 driver -> nu_driver_entry = driver_entry; |
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171 |
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172 /* Protect against access to the list of created drivers. */ |
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173 TCT_Protect(&IOD_List_Protect); |
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174 |
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175 /* At this point the driver is completely built. The ID can now be |
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176 set and it can be linked into the created driver list. */ |
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177 driver -> nu_driver_id = IO_DRIVER_ID; |
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178 |
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179 /* Link the driver into the list of created I/O drivers and increment the |
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180 total number of drivers in the system. */ |
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181 CSC_Place_On_List(&IOD_Created_Drivers_List, (CS_NODE *) driver); |
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182 IOD_Total_Drivers++; |
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183 |
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184 #ifdef INCLUDE_PROVIEW |
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185 _RTProf_DumpDriver(RT_PROF_CREATE_DRIVER, driver, RT_PROF_OK); |
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186 #endif /*INCLUDE_PROVIEW*/ |
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187 /* Release protection against access to the list of created I/O drivers. */ |
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188 TCT_Unprotect(); |
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189 |
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190 /* Return to user mode */ |
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191 NU_USER_MODE(); |
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192 |
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193 /* Return successful completion. */ |
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194 return(NU_SUCCESS); |
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195 } |
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196 |
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197 |
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198 /*************************************************************************/ |
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199 /* */ |
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200 /* FUNCTION */ |
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201 /* */ |
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202 /* IOC_Delete_Driver */ |
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203 /* */ |
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204 /* DESCRIPTION */ |
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205 /* */ |
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206 /* This function deletes an I/O driver and removes it from the list */ |
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207 /* of created drivers. Note that this function does not actually */ |
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208 /* invoke the driver. */ |
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209 /* */ |
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210 /* CALLED BY */ |
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211 /* */ |
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212 /* Application */ |
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213 /* IOCE_Delete_Driver Error checking shell */ |
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214 /* */ |
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215 /* CALLS */ |
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216 /* */ |
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217 /* CSC_Remove_From_List Remove node from list */ |
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218 /* [HIC_Make_History_Entry] Make entry in history log */ |
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219 /* [TCT_Check_Stack] Stack checking function */ |
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220 /* TCT_Protect Protect created list */ |
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221 /* TCT_Unprotect Release protection */ |
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222 /* */ |
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223 /* INPUTS */ |
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224 /* */ |
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225 /* driver Driver control block pointer */ |
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226 /* */ |
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227 /* OUTPUTS */ |
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228 /* */ |
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229 /* NU_SUCCESS */ |
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230 /* */ |
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231 /* HISTORY */ |
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232 /* */ |
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233 /* DATE REMARKS */ |
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234 /* */ |
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235 /* 03-01-1993 Created initial version 1.0 */ |
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236 /* 04-19-1993 Verified version 1.0 */ |
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237 /* */ |
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238 /*************************************************************************/ |
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239 STATUS IOC_Delete_Driver(NU_DRIVER *driver) |
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240 { |
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241 NU_SUPERV_USER_VARIABLES |
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242 |
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243 /* Switch to supervisor mode */ |
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244 NU_SUPERVISOR_MODE(); |
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245 |
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246 #ifdef NU_ENABLE_STACK_CHECK |
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247 |
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248 /* Call stack checking function to check for an overflow condition. */ |
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249 TCT_Check_Stack(); |
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250 |
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251 #endif |
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252 |
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253 #ifdef NU_ENABLE_HISTORY |
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254 |
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255 /* Make an entry that corresponds to this function in the system history |
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256 log. */ |
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257 HIC_Make_History_Entry(NU_DELETE_DRIVER_ID, (UNSIGNED) driver , |
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258 (UNSIGNED) 0, (UNSIGNED) 0); |
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259 |
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260 #endif |
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261 |
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262 /* Protect against access to the list of created I/O drivers. */ |
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263 TCT_Protect(&IOD_List_Protect); |
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264 |
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265 #ifdef INCLUDE_PROVIEW |
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266 _RTProf_DumpDriver(RT_PROF_DELETE_DRIVER, driver, RT_PROF_OK); |
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267 #endif /*INCLUDE_PROVIEW*/ |
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268 /* Set the driver ID to 0. */ |
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269 driver -> nu_driver_id = 0; |
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270 |
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271 /* Remove the driver from the list of created I/O drivers. */ |
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272 CSC_Remove_From_List(&IOD_Created_Drivers_List, (CS_NODE *) driver); |
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273 |
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274 /* Decrement the total number of created I/O drivers. */ |
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275 IOD_Total_Drivers--; |
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276 |
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277 /* Release protection against access to the list of created I/O drivers. */ |
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278 TCT_Unprotect(); |
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279 |
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280 /* Return to user mode */ |
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281 NU_USER_MODE(); |
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282 |
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283 /* Return a successful completion. */ |
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284 return(NU_SUCCESS); |
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285 } |
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286 |
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287 |
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288 /*************************************************************************/ |
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289 /* */ |
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290 /* FUNCTION */ |
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291 /* */ |
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292 /* IOC_Request_Driver */ |
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293 /* */ |
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294 /* DESCRIPTION */ |
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295 /* */ |
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296 /* This function sends a user request to the specified I/O driver. */ |
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297 /* */ |
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298 /* CALLED BY */ |
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299 /* */ |
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300 /* Application */ |
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301 /* IOCE_Request_Driver Error checking shell */ |
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302 /* */ |
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303 /* CALLS */ |
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304 /* */ |
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305 /* [HIC_Make_History_Entry] Make entry in history log */ |
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306 /* [TCT_Check_Stack] Stack checking function */ |
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307 /* */ |
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308 /* INPUTS */ |
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309 /* */ |
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310 /* driver Driver control block pointer */ |
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311 /* request User's I/O request */ |
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312 /* */ |
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313 /* OUTPUTS */ |
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314 /* */ |
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315 /* NU_SUCCESS If service is successful */ |
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316 /* */ |
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317 /* HISTORY */ |
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318 /* */ |
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319 /* DATE REMARKS */ |
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320 /* */ |
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321 /* 03-01-1993 Created initial version 1.0 */ |
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322 /* 04-19-1993 Verified version 1.0 */ |
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323 /* */ |
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324 /*************************************************************************/ |
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325 STATUS IOC_Request_Driver(NU_DRIVER *driver , NU_DRIVER_REQUEST *request) |
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326 { |
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327 NU_SUPERV_USER_VARIABLES |
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328 |
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329 /* Switch to supervisor mode */ |
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330 NU_SUPERVISOR_MODE(); |
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331 |
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332 #ifdef NU_ENABLE_STACK_CHECK |
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333 |
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334 /* Call stack checking function to check for an overflow condition. */ |
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335 TCT_Check_Stack(); |
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336 |
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337 #endif |
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338 |
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339 #ifdef NU_ENABLE_HISTORY |
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340 |
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341 /* Make an entry that corresponds to this function in the system history |
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342 log. */ |
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343 HIC_Make_History_Entry(NU_REQUEST_DRIVER_ID, (UNSIGNED) driver, |
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344 (UNSIGNED) request, (UNSIGNED) 0); |
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345 |
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346 #endif |
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347 |
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348 #ifdef INCLUDE_PROVIEW |
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349 _RTProf_DumpDriver(RT_PROF_REQUEST_DRIVER, driver, RT_PROF_OK); |
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350 #endif /*INCLUDE_PROVIEW*/ |
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351 /* Call the specified I/O Driver. */ |
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352 (*(driver -> nu_driver_entry)) (driver, request); |
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353 |
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354 /* Return to user mode */ |
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355 NU_USER_MODE(); |
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356 |
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357 /* Return the completion status. */ |
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358 return(NU_SUCCESS); |
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359 } |
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360 |
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361 |
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362 /*************************************************************************/ |
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363 /* */ |
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364 /* FUNCTION */ |
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365 /* */ |
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366 /* IOC_Resume_Driver */ |
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367 /* */ |
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368 /* DESCRIPTION */ |
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369 /* */ |
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370 /* This function resumes a task previously suspended inside of an */ |
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371 /* I/O driver. Typically, this function is called from within an */ |
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372 /* I/O driver. */ |
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373 /* */ |
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374 /* CALLED BY */ |
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375 /* */ |
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376 /* Application */ |
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377 /* IOCE_Resume_Driver Error checking shell */ |
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378 /* */ |
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379 /* CALLS */ |
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380 /* */ |
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381 /* [HIC_Make_History_Entry] Make entry in history log */ |
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382 /* TCC_Resume_Task Resume a suspended task */ |
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383 /* TCT_Control_To_System Transfer control to higher */ |
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|
384 /* priority task */ |
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|
385 /* [TCT_Check_Stack] Stack checking function */ |
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|
386 /* TCT_Get_Current_Protect Pickup current protection */ |
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|
387 /* TCT_Set_Current_Protect Set current protection */ |
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|
388 /* TCT_System_Protect Protect against system access*/ |
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|
389 /* TCT_System_Unprotect Release system protection */ |
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|
390 /* TCT_Unprotect Release system protection */ |
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|
391 /* TCT_Unprotect_Specific Release specific protection */ |
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|
392 /* */ |
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parents:
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|
393 /* INPUTS */ |
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|
394 /* */ |
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|
395 /* task Pointer of task to resume */ |
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|
396 /* */ |
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|
397 /* OUTPUTS */ |
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|
398 /* */ |
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|
399 /* NU_SUCCESS If service is successful */ |
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|
400 /* */ |
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parents:
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|
401 /* HISTORY */ |
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parents:
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|
402 /* */ |
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parents:
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|
403 /* DATE REMARKS */ |
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parents:
diff
changeset
|
404 /* */ |
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parents:
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|
405 /* 03-01-1993 Created initial version 1.0 */ |
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|
406 /* 04-19-1993 Verified version 1.0 */ |
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|
407 /* 03-01-1994 Changed function interfaces to */ |
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parents:
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|
408 /* match prototype, changed */ |
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parents:
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|
409 /* protection logic, resulting in */ |
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parents:
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|
410 /* version 1.1 */ |
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parents:
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|
411 /* */ |
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|
412 /* 03-18-1994 Verified version 1.1 */ |
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parents:
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|
413 /* 04-23-1996 Corrected SPR121 */ |
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parents:
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|
414 /* */ |
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|
415 /*************************************************************************/ |
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|
416 STATUS IOC_Resume_Driver(NU_TASK *task) |
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|
417 { |
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|
418 |
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|
419 TC_PROTECT *save_protect; /* Saved protect pointer */ |
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|
420 NU_SUPERV_USER_VARIABLES |
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|
421 |
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|
422 |
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parents:
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|
423 /* Switch to supervisor mode */ |
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|
424 NU_SUPERVISOR_MODE(); |
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|
425 |
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parents:
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|
426 #ifdef NU_ENABLE_STACK_CHECK |
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|
427 |
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parents:
diff
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|
428 /* Call stack checking function to check for an overflow condition. */ |
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parents:
diff
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|
429 TCT_Check_Stack(); |
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parents:
diff
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|
430 |
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parents:
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|
431 #endif |
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|
432 |
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|
433 #ifdef NU_ENABLE_HISTORY |
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|
434 |
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parents:
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|
435 /* Make an entry that corresponds to this function in the system history |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
436 log. */ |
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parents:
diff
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|
437 HIC_Make_History_Entry(NU_RESUME_DRIVER_ID, (UNSIGNED) task, |
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|
438 (UNSIGNED) 0, (UNSIGNED) 0); |
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parents:
diff
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|
439 |
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parents:
diff
changeset
|
440 #endif |
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parents:
diff
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|
441 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
442 /* Pickup current protection. */ |
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|
443 save_protect = TCT_Get_Current_Protect(); |
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parents:
diff
changeset
|
444 |
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parents:
diff
changeset
|
445 /* Protect against system access. */ |
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parents:
diff
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|
446 TCT_System_Protect(); |
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diff
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|
447 |
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parents:
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|
448 #ifdef INCLUDE_PROVIEW |
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|
449 _RTProf_DumpDriver(RT_PROF_RESUME_DRIVER, 0 , RT_PROF_OK); |
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parents:
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|
450 #endif /*INCLUDE_PROVIEW*/ |
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parents:
diff
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|
451 /* Resume the specified task. */ |
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parents:
diff
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|
452 if (TCC_Resume_Task(task, NU_DRIVER_SUSPEND)) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
453 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
454 /* Only unprotect if there is protection in place. */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
455 if (save_protect) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
456 { |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
457 /* Release protection caller had. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
458 TCT_Unprotect_Specific(save_protect); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
459 } |
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parents:
diff
changeset
|
460 |
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parents:
diff
changeset
|
461 /* Transfer control to the system if the resumed task function |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
462 detects a preemption condition. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
463 TCT_Control_To_System(); |
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parents:
diff
changeset
|
464 } |
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parents:
diff
changeset
|
465 else |
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parents:
diff
changeset
|
466 { |
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parents:
diff
changeset
|
467 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
468 /* Determine if there was protection previously in force. */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
469 if (save_protect) |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
470 { |
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parents:
diff
changeset
|
471 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
472 /* Switch to original protection. */ |
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parents:
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|
473 TCT_Set_Current_Protect(save_protect); |
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parents:
diff
changeset
|
474 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
475 /* Release system protection. */ |
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parents:
diff
changeset
|
476 TCT_System_Unprotect(); |
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parents:
diff
changeset
|
477 } |
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parents:
diff
changeset
|
478 else |
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parents:
diff
changeset
|
479 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
480 /* Release system protection. */ |
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parents:
diff
changeset
|
481 TCT_Unprotect(); |
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parents:
diff
changeset
|
482 } |
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parents:
diff
changeset
|
483 |
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parents:
diff
changeset
|
484 /* Return to user mode */ |
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parents:
diff
changeset
|
485 NU_USER_MODE(); |
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parents:
diff
changeset
|
486 |
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parents:
diff
changeset
|
487 /* Return the completion status. */ |
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parents:
diff
changeset
|
488 return(NU_SUCCESS); |
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parents:
diff
changeset
|
489 } |
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parents:
diff
changeset
|
490 |
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parents:
diff
changeset
|
491 |
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parents:
diff
changeset
|
492 |
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parents:
diff
changeset
|
493 /*************************************************************************/ |
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parents:
diff
changeset
|
494 /* */ |
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parents:
diff
changeset
|
495 /* FUNCTION */ |
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parents:
diff
changeset
|
496 /* */ |
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parents:
diff
changeset
|
497 /* IOC_Suspend_Driver */ |
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parents:
diff
changeset
|
498 /* */ |
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parents:
diff
changeset
|
499 /* DESCRIPTION */ |
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parents:
diff
changeset
|
500 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
501 /* This function suspends a task inside of an I/O driver. It is */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
502 /* the responsibility of the I/O driver to keep track of tasks */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
503 /* waiting inside of an I/O driver. */ |
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parents:
diff
changeset
|
504 /* */ |
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parents:
diff
changeset
|
505 /* CALLED BY */ |
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parents:
diff
changeset
|
506 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
507 /* Application */ |
947b1f473960
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parents:
diff
changeset
|
508 /* IOCE_Suspend_Driver Error checking shell */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
509 /* */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
510 /* CALLS */ |
947b1f473960
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parents:
diff
changeset
|
511 /* */ |
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512 /* [HIC_Make_History_Entry] Make entry in history log */ |
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513 /* TCC_Suspend_Task Suspend calling task */ |
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514 /* TCT_Current_Thread Current task thread */ |
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515 /* [TCT_Check_Stack] Stack checking function */ |
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516 /* TCT_Get_Current_Protect Pickup current protect ptr */ |
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517 /* TCT_Set_Suspend_Protect Setup suspend protect field */ |
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518 /* TCT_System_Protect Protect against system access*/ |
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519 /* TCT_Unprotect_Specific Release user protection */ |
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520 /* */ |
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521 /* INPUTS */ |
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522 /* */ |
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523 /* terminate_routine Termination/Timeout cleanup */ |
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524 /* routine */ |
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525 /* information Information pointer of the */ |
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526 /* cleanup routine */ |
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527 /* timeout Suspension timeout request */ |
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528 /* */ |
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529 /* OUTPUTS */ |
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530 /* */ |
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531 /* NU_SUCCESS If service is successful */ |
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532 /* */ |
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533 /* HISTORY */ |
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534 /* */ |
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535 /* DATE REMARKS */ |
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536 /* */ |
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537 /* 03-01-1993 Created initial version 1.0 */ |
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538 /* 04-19-1993 Verified version 1.0 */ |
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539 /* 03-01-1994 Changed protection logic, */ |
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540 /* resulting in version 1.1 */ |
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541 /* */ |
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542 /* 03-18-1994 Verified version 1.1 */ |
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543 /* 04-23-1996 Corrected SPR121. */ |
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544 /* */ |
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545 /*************************************************************************/ |
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546 STATUS IOC_Suspend_Driver(VOID (*terminate_routine)(VOID *), |
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547 VOID *information, UNSIGNED timeout) |
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548 { |
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549 |
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550 TC_PROTECT *suspend_protect; /* Current protection */ |
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551 NU_SUPERV_USER_VARIABLES |
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552 |
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553 /* Switch to supervisor mode */ |
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554 NU_SUPERVISOR_MODE(); |
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555 |
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556 #ifdef NU_ENABLE_STACK_CHECK |
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557 |
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558 /* Call stack checking function to check for an overflow condition. */ |
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559 TCT_Check_Stack(); |
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560 |
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561 #endif |
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562 |
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563 #ifdef NU_ENABLE_HISTORY |
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564 |
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565 /* Make an entry that corresponds to this function in the system history |
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566 log. */ |
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567 HIC_Make_History_Entry(NU_SUSPEND_DRIVER_ID, (UNSIGNED) terminate_routine, |
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568 (UNSIGNED) information, (UNSIGNED) timeout); |
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569 |
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570 #endif |
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571 |
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572 |
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573 /* Pickup current protect. */ |
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574 suspend_protect = TCT_Get_Current_Protect(); |
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575 |
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576 /* Setup system protection. */ |
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577 TCT_System_Protect(); |
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578 |
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579 #ifdef INCLUDE_PROVIEW |
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580 _RTProf_DumpDriver(RT_PROF_SUSPEND_DRIVER, 0 , RT_PROF_OK); |
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581 #endif /*INCLUDE_PROVIEW*/ |
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582 /* If no protection exists, don't unprotect. */ |
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583 if (suspend_protect) |
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584 { |
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585 /* Release initial protection. */ |
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586 TCT_Unprotect_Specific(suspend_protect); |
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587 |
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588 /* Save suspend protect for timeout and terminate. */ |
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589 TCT_Set_Suspend_Protect(suspend_protect); |
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590 } |
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591 |
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592 /* Suspend the calling task. */ |
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593 TCC_Suspend_Task((NU_TASK *) TCT_Current_Thread(), NU_DRIVER_SUSPEND, |
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594 terminate_routine, information, timeout); |
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595 |
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596 /* Return to user mode */ |
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597 NU_USER_MODE(); |
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|
598 |
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599 /* Return the completion status. */ |
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600 return(NU_SUCCESS); |
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|
601 } |
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|
602 |
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|
603 |
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|
604 |
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605 |
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606 |