annotate src/g23m-fad/ip/ip_tim.c @ 220:0ed36de51973

ABB semaphore protection overhaul The ABB semaphone protection logic that came with TCS211 from TI was broken in several ways: * Some semaphore-protected functions were called from Application_Initialize() context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with NU_INVALID_SUSPEND in this context, but the return value wasn't checked, and NU_Release_Semaphore() would be called unconditionally at the end. The latter call would increment the semaphore count past 1, making the semaphore no longer binary and thus no longer effective for resource protection. The fix is to check the return value from NU_Obtain_Semaphore() and skip the NU_Release_Semaphore() call if the semaphore wasn't properly obtained. * Some SPI hardware manipulation was being done before entering the semaphore- protected critical section. The fix is to reorder the code: first obtain the semaphore, then do everything else. * In the corner case of L1/DSP recovery, l1_abb_power_on() would call some non-semaphore-protected ABB & SPI init functions. The fix is to skip those calls in the case of recovery. * A few additional corner cases existed, all of which are fixed by making ABB semaphore protection 100% consistent for all ABB functions and code paths. There is still one remaining problem of priority inversion: suppose a low- priority task calls an ABB function, and some medium-priority task just happens to preempt right in the middle of that semaphore-protected ABB operation. Then the high-priority SPI task is locked out for a non-deterministic time until that medium-priority task finishes its work and goes back to sleep. This priority inversion problem remains outstanding for now.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 26 Apr 2021 20:55:25 +0000
parents fa8dc04885d8
children
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1
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1 /*
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2 +-----------------------------------------------------------------------------
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3 | Project : GSM-FaD (8411)
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4 | Modul : IP_TIM
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5 +-----------------------------------------------------------------------------
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6 | Copyright 2002 Texas Instruments Berlin, AG
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7 | All rights reserved.
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8 |
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9 | This file is confidential and a trade secret of Texas
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10 | Instruments Berlin, AG
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11 | The receipt of or possession of this file does not convey
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12 | any rights to reproduce or disclose its contents or to
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13 | manufacture, use, or sell anything it may describe, in
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14 | whole, or in part, without the specific written consent of
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15 | Texas Instruments Berlin, AG.
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16 +-----------------------------------------------------------------------------
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17 | Purpose : This Modul defines the timer handling functions
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18 | for the component
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19 | Radio Link Protocol of the mobile station
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20 +-----------------------------------------------------------------------------
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21 */
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22
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23 #define ENTITY_IP
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24
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25 /*==== INCLUDES ===================================================*/
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26
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27 #include <string.h>
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28 #include "typedefs.h"
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29 #include "pconst.cdg"
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30 #include "vsi.h"
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31 #include "macdef.h"
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32 #include "pconst.cdg"
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33 #include "custom.h"
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34 #include "gsm.h"
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35 #include "cnf_ip.h"
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36 #include "mon_ip.h"
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37 #include "prim.h"
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38 #include "pei.h"
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39 #include "tok.h"
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40 #include "ccdapi.h"
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41
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42 #include "dti.h"
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43 #include "ip.h"
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44 #include "ip_udp.h"
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45
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46 /*==== EXPORT =====================================================*/
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47
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48 /*==== PRIVAT =====================================================*/
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49
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50 /*==== VARIABLES ==================================================*/
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51
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52 /*==== FUNCTIONS ==================================================*/
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53
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54 /*
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55 +--------------------------------------------------------------------+
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56 | PROJECT : GSM-FaD (8411) MODULE : IP_TIM |
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57 | STATE : code ROUTINE : tim_reassembly |
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58 +--------------------------------------------------------------------+
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59
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60 PURPOSE : Timeout of timer T_REASSEMBLY
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61
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62 */
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63
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64 GLOBAL void tim_reassembly (/* USHORT layer, USHORT segm_server*/)
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65 {
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66 /*
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67 * shall be replaced for multiple instances by
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68 *
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69 * UBYTE sel_dl_layer = layer;
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70 * p_dl->pos_server = segm_server;
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71 */
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72 /* T_HILA *p_ul = &(ip_data->hila); */
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73 T_LOLA *p_dl = &(ip_data->lola);
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74 T_KER *p_ker = &(ip_data->ker);
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75
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76
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77 TRACE_FUNCTION ("tim_reassembly()");
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78
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79
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80
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81 switch (GET_STATE (KER))
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82 {
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83
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84 case CONNECTED:
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85 {
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86
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87 build_ip_packet(FALSE, B_ICMP_REASSEMBLE_TIMEOUT);
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88
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89 p_dl->state_reassembly[p_dl->pos_server] = NO_SEGMENTS;
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90
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91 /*
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92 * If ready indication is received - send data_req at once
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93 */
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94
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95 if(GET_STATE(HILA) EQ WAIT)
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96 {
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97 T_DTI2_DATA_REQ *dti_data_req;
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98
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99 p_ker->send_icmp = FALSE;
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100
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101 dti_data_req = p_ker->icmp_dti_data_req;
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102
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103 dti_data_req = p_ker->icmp_dti_data_req;
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104 dti_data_req->parameters.p_id = DTI_PID_IP;
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105 dti_data_req->parameters.st_lines.st_flow = DTI_FLOW_ON;
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106 dti_data_req->parameters.st_lines.st_line_sa = DTI_SA_ON;
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107 dti_data_req->parameters.st_lines.st_line_sb = DTI_SB_ON;
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108 dti_data_req->parameters.st_lines.st_break_len = DTI_BREAK_OFF;
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109
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110 PACCESS (dti_data_req);
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111 {
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112 PPASS(dti_data_req, dti_data_ind, DTI2_DATA_IND);
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113 dti_send_data(ip_hDTI, IP_DTI_DEF_INSTANCE, IP_DTI_LL_INTERFACE,
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114 IP_DTI_DEF_CHANNEL, dti_data_ind);
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115 }
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116 dti_start(ip_hDTI, IP_DTI_DEF_INSTANCE, IP_DTI_LL_INTERFACE,
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117 IP_DTI_DEF_CHANNEL);
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118 SET_STATE(HILA, IDLE);
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119 }
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120 else
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121
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122 /*
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123 * Send the ICMP-Message later on after ready indication
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124 */
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125
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126 p_ker->send_icmp = TRUE;
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127 }
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128 break;
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129
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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130 default:
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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131 break;
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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132 }
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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133
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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134 /*
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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135 * Free and stop the timer
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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136 */
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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137 p_dl->timer_reass_running[p_dl->pos_server] = FALSE;
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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138 }
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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139
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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140 /*
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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141 +--------------------------------------------------------------------+
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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142 | PROJECT : GSM-FaD (8411) MODULE : IP_TIM |
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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143 | STATE : code ROUTINE : tim_init_timer |
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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144 +--------------------------------------------------------------------+
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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145
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 PURPOSE : Initialise Time-out FIFO and configuration data.
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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147
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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148 */
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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149
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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150 GLOBAL BOOL tim_init_timer (void)
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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151 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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152 return TRUE;
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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153 }
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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154
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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155 /*
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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156 +--------------------------------------------------------------------+
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 | PROJECT : GSM-FaD (8411) MODULE : IP_TIM |
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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158 | STATE : code ROUTINE : tim_set_timeout_flag |
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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159 +--------------------------------------------------------------------+
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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160
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 PURPOSE : Set timeout flag according to timer handle
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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162
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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163 */
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 /*
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 +--------------------------------------------------------------------+
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 | PROJECT : GSM-FaD (8411) MODULE : IP_TIM |
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 | STATE : code ROUTINE : tim_flush_fifo |
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 +--------------------------------------------------------------------+
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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169
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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170 PURPOSE : Flush timer fifo for timer handle
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 */
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 /*
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 +--------------------------------------------------------------------+
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 | PROJECT : GSM-FaD (8411) MODULE : IP_TIM |
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 | STATE : code ROUTINE : tim_handle_timeout |
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 +--------------------------------------------------------------------+
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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178
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
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179 PURPOSE : execute timeout function depending on t_flag
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 */
fa8dc04885d8 src/g23m-*: import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182