FreeCalypso > hg > fc-magnetite

annotate src/cs/services/tty/tty_env.c @ 311:86a89a21078f

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doc/Compiling: update for fc-host-tools-r7
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 03 Nov 2017 20:45:12 +0000
parents 945cf7f506b2
children
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1 /**
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2 * @file tty_env.c
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3 *
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4 * Coding of the Riviera Generic Functions,
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5 * except handle_message and handle_timer, which are
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6 * in tty_handle_message.c and tty_handle_timer.c
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7 *
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8 * @author Frederic Turgis (f-turgis@ti.com) & Gerard Cauvy (g-cauvy@ti.com)
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9 * @version 0.1
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10 */
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11
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12 /*
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13 * History:
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14 *
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15 * Date Modification
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16 * ------------------------------------
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17 * 01/27/2003 Create
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18 *
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19 * (C) Copyright 2003 by Texas Instruments Incorporated, All Rights Reserved
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20 */
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21
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22
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23 #include "tty/tty_i.h"
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24
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25 #include "rvm/rvm_priorities.h"
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26 #include "tty/tty_env.h"
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27 #include <string.h>
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28
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29 /**
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30 * Pointer on the structure gathering all the global variables
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31 * used by TTY instance.
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32 */
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33 T_TTY_ENV_CTRL_BLK *tty_env_ctrl_blk_p = NULL;
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34
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35
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36 /* External declaration */
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37 extern T_RV_RET tty_core(void);
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38
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39 /**
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40 * Called by the RV manager to learn
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41 * tty requirements in terms of memory, SWEs...
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42 *
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43 * @param swe_info Pointer to the structure to fill
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44 * containing infos related to the tty SWE.
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45 *
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46 * @return RVM_OK
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47 */
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48 T_RVM_RETURN tty_get_info(T_RVM_INFO_SWE * swe_info)
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49 {
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50 /* TTY is a Type 4 SWE. */
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51 swe_info->swe_type = RVM_SWE_TYPE_4;
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52
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53 memcpy(swe_info->type_info.type4.swe_name, "TTY", sizeof("TTY"));
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54 swe_info->type_info.type4.swe_use_id = TTY_USE_ID;
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55
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56 /* SWE info */
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57 swe_info->type_info.type4.stack_size = TTY_STACK_SIZE;
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58 swe_info->type_info.type4.priority = RVM_TTY_TASK_PRIORITY;
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59 swe_info->type_info.type4.version = BUILD_VERSION_NUMBER(0,1,0);
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60
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61 /* Memory bank info */
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62 swe_info->type_info.type4.nb_mem_bank = 1;
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63 memcpy(swe_info->type_info.type4.mem_bank[0].bank_name, "TTY_PRIM", sizeof("TTY_PRIM"));
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64 swe_info->type_info.type4.mem_bank[0].initial_params.size = TTY_MB_PRIM_SIZE;
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65 swe_info->type_info.type4.mem_bank[0].initial_params.watermark = TTY_MB_PRIM_WATERMARK;
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66
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67 /*
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68 * Linked SWE info.
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69 */
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70 swe_info->type_info.type4.nb_linked_swe = 0;
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71
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72 /* Set the return path: NOT USED. */
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73 swe_info->type_info.type4.return_path.callback_func = NULL;
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74 swe_info->type_info.type4.return_path.addr_id = 0;
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75
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76 /* Generic functions */
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77 swe_info->type_info.type4.set_info = tty_set_info;
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78 swe_info->type_info.type4.init = tty_init;
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79 swe_info->type_info.type4.core = tty_core;
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80 swe_info->type_info.type4.stop = tty_stop;
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81 swe_info->type_info.type4.kill = tty_kill;
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82
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83 return RVM_OK;
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84 }
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85
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86
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87 /**
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88 * Called by the RV manager to inform the tty SWE about
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89 * addr_id, return path, mb_id and error function.
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90 *
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91 * It is called only once.
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92 *
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93 * @param addr_id Address ID of the TTY SWE.
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94 * Used to send messages to the SWE.
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95 * @param return_path Return path array of the linked SWEs.
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96 * @param bk_id_table Array of memory bank ids allocated to the SWE.
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97 * @param call_back_error_ft Callback function to call in case of unrecoverable error.
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98 * @return RVM_MEMORY_ERR ou RVM_OK.
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99 */
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100 T_RVM_RETURN tty_set_info ( T_RVF_G_ADDR_ID addr_id,
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101 T_RV_RETURN_PATH return_path[],
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102 T_RVF_MB_ID bk_id_table[],
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103 T_RVM_CB_FUNC call_back_error_ft)
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104 {
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105 /* Memory bank status (red, yellow, green). */
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106 T_RVF_MB_STATUS mb_status;
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107
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108
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109 /* Create instance gathering all the variable used by TTY instance */
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110 mb_status = rvf_get_buf(bk_id_table[0],
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111 sizeof(T_TTY_ENV_CTRL_BLK),
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112 (T_RVF_BUFFER**)&tty_env_ctrl_blk_p);
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113 if (mb_status == RVF_RED)
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114 {
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115 TTY_SEND_TRACE("TTY: Error to get memory ",RV_TRACE_LEVEL_ERROR);
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116 return RVM_MEMORY_ERR;
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117 }
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118 else if (mb_status == RVF_YELLOW)
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119 {
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120 /*
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121 * The flag is yellow, there will soon be not enough memory anymore.
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122 */
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123 TTY_SEND_TRACE("TTY: Getting short on memory ", RV_TRACE_LEVEL_WARNING);
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124 }
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125
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126 /* Store the initial State; default is IDLE. */
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127 tty_env_ctrl_blk_p->state = TTY_IDLE;
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128
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129 /* Store the address ID. */
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130 tty_env_ctrl_blk_p->addr_id = addr_id;
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131
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132 /* Store the pointer to the error function. */
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133 tty_env_ctrl_blk_p->error_ft = call_back_error_ft;
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134
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135 /*
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136 * Store the mem bank id.
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137 * Memory bank ID (mb_id) can be retrieved later using rvf_get_mb_id function.
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138 */
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139 tty_env_ctrl_blk_p->prim_mb_id = bk_id_table[0];
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140
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141 /*
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142 * Array return_path: Return path of linked SWE.
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143 * If the linked SWE have an API based on messages, their return path given
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144 * by the set_info function would be stored and used to communicate with them.
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145 * But since the linked SWE of TTY have an API based on functions, it is not
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146 * necessary to store their return path.
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147 */
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148
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149 return RVM_OK;
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150 }
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151
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152
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153 /**
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154 * Called by the RV manager to initialize the
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155 * tty SWE before creating the task and calling tty_start.
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156 *
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157 * @return RVM_OK
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158 */
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159 T_RVM_RETURN tty_init (void)
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160 {
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161 /*
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162 * TTY Global Initialization.
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163 */
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164
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165 return RVM_OK;
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166 }
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167
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168
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169 /**
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170 * Called by the RV manager to stop the tty SWE.
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171 *
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172 * @return RVM_OK or RVM_INTERNAL_ERR
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173 */
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174 T_RVM_RETURN tty_stop (void)
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175 {
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176 /*
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177 * Here we should stop the activities of the SWE
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178 * It is still possible to send messages to other SWE, to unregister for example.
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179 */
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180 TTY_SEND_TRACE("TTY: stop called", RV_TRACE_LEVEL_DEBUG_LOW);
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181
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182 return RVM_OK;
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183 }
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184
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185
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186 /**
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187 * Called by the RV manager to kill the tty SWE,
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188 * after the tty_stop function has been called.
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189 *
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190 * @return RVM_OK
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191 */
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192 T_RVM_RETURN tty_kill (void)
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193 {
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194 /*
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195 * Here we cannot send messages anymore. We only free the last
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196 * used resources, like the control block buffer.
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197 */
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198 TTY_SEND_TRACE("TTY: kill called", RV_TRACE_LEVEL_DEBUG_LOW);
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199
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200 rvf_free_buf(tty_env_ctrl_blk_p);
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201
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202 return RVM_OK;
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203 }