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961 | pj | 1 | /* |
2 | * Project: S.Ha.R.K. |
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3 | * |
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4 | * Coordinators: |
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5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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6 | * Paolo Gai <pj@gandalf.sssup.it> |
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7 | * |
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8 | * Authors : |
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9 | * Giacomo Guidi <giacomo@gandalf.sssup.it> |
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10 | * (see the web pages for full authors list) |
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11 | * |
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12 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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13 | * |
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14 | * http://www.sssup.it |
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15 | * http://retis.sssup.it |
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16 | * http://shark.sssup.it |
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17 | */ |
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18 | |||
19 | /* |
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20 | * Copyright (C) 2000,2002 Paolo Gai |
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21 | * |
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22 | * This program is free software; you can redistribute it and/or modify |
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23 | * it under the terms of the GNU General Public License as published by |
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24 | * the Free Software Foundation; either version 2 of the License, or |
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25 | * (at your option) any later version. |
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26 | * |
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27 | * This program is distributed in the hope that it will be useful, |
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28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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30 | * GNU General Public License for more details. |
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31 | * |
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32 | * You should have received a copy of the GNU General Public License |
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33 | * along with this program; if not, write to the Free Software |
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34 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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35 | * |
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36 | */ |
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37 | |||
38 | /* Interrupt Driver Module */ |
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39 | |||
40 | #include <intdrive/intdrive/intdrive.h> |
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1018 | mauro | 41 | #include <intdrive/intdrive/inttask.h> |
961 | pj | 42 | #include <kernel/model.h> |
43 | #include <kernel/descr.h> |
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44 | #include <kernel/var.h> |
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45 | #include <kernel/func.h> |
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46 | #include <tracer.h> |
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47 | |||
48 | #include <ll/i386/64bit.h> |
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49 | |||
50 | /*+ Status used in the level +*/ |
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51 | #define INTDRIVE_READY MODULE_STATUS_BASE /*+ - Ready status +*/ |
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52 | #define INTDRIVE_WCET_VIOLATED MODULE_STATUS_BASE+2 /*+ when wcet is finished +*/ |
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53 | #define INTDRIVE_IDLE MODULE_STATUS_BASE+3 /*+ to wait the replenish +*/ |
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54 | #define INTDRIVE_WAIT MODULE_STATUS_BASE+4 /*+ to wait the activation */ |
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55 | |||
56 | //#define INTDRIVE_DEBUG |
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57 | |||
58 | /*+ the level redefinition for the IntDrive +*/ |
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59 | typedef struct { |
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60 | level_des l; /*+ the standard level descriptor +*/ |
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61 | |||
62 | TIME replenish_period; |
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63 | TIME capacity; |
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64 | TIME q_theta; |
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65 | |||
66 | struct timespec act_time; |
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67 | |||
68 | int avail; |
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69 | int replenish_timer; |
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70 | |||
71 | //struct timespec replenish_expires; |
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72 | //int wcet_timer; |
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73 | |||
74 | int act_number; /*+ the activation number +*/ |
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75 | |||
76 | int flags; /*+ the init flags... +*/ |
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77 | |||
78 | bandwidth_t U; /*+ the used bandwidth +*/ |
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79 | |||
80 | } INTDRIVE_level_des; |
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81 | |||
82 | PID INTDRIVE_task = NIL; |
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83 | |||
84 | /* Replenish the capacity */ |
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85 | static void INTDRIVE_timer(void *arg) |
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86 | { |
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87 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(arg); |
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88 | |||
89 | lev->replenish_timer = NIL; |
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90 | |||
91 | #ifdef INTDRIVE_DEBUG |
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92 | kern_printf("(INTD:TIMER)"); |
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93 | #endif |
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94 | |||
95 | if (INTDRIVE_task == NIL) return; |
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96 | |||
97 | lev->avail = lev->q_theta; |
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98 | |||
99 | TRACER_LOGEVENT(FTrace_EVT_user_event_0, 0, lev->avail + INT_MAX); |
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100 | |||
101 | switch (proc_table[INTDRIVE_task].status) { |
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102 | |||
103 | case INTDRIVE_IDLE: |
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104 | if (lev->act_number) { |
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105 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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106 | event_need_reschedule(); |
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107 | } else { |
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108 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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109 | } |
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110 | break; |
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111 | } |
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112 | } |
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113 | |||
114 | /*static void INTDRIVE_wcet_timer(void *arg) |
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115 | { |
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116 | |||
117 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(arg); |
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118 | |||
119 | lev->wcet_timer = NIL; |
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120 | |||
121 | kern_raise(XWCET_VIOLATION,INTDRIVE_task); |
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122 | |||
123 | }*/ |
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124 | |||
125 | static PID INTDRIVE_public_scheduler(LEVEL l) |
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126 | { |
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127 | |||
128 | if (INTDRIVE_task == NIL) return NIL; |
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129 | |||
130 | if (proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
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131 | proc_table[INTDRIVE_task].status == EXE) |
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132 | return INTDRIVE_task; |
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133 | else |
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134 | return NIL; |
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135 | |||
136 | } |
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137 | |||
138 | static int INTDRIVE_public_create(LEVEL l, PID p, TASK_MODEL *m) |
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139 | { |
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140 | |||
141 | HARD_TASK_MODEL *h; |
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142 | |||
143 | if (m->pclass != HARD_PCLASS) return -1; |
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144 | if (m->level != 0 && m->level != l) return -1; |
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145 | h = (HARD_TASK_MODEL *)m; |
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146 | if (!h->wcet && h->periodicity != INTDRIVE) return -1; |
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147 | |||
148 | if (INTDRIVE_task != NIL) return -1; |
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149 | |||
150 | INTDRIVE_task = p; |
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151 | |||
152 | proc_table[INTDRIVE_task].wcet = h->wcet; |
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153 | proc_table[INTDRIVE_task].avail_time = h->wcet; |
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154 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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155 | proc_table[INTDRIVE_task].control &= ~CONTROL_CAP; |
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156 | |||
157 | return 0; |
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158 | |||
159 | } |
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160 | |||
161 | static void INTDRIVE_public_dispatch(LEVEL l, PID p, int nostop) |
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162 | { |
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163 | |||
164 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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165 | //struct timespec time; |
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166 | |||
167 | kern_gettime(&(lev->act_time)); |
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168 | |||
169 | /*TIMESPEC_ASSIGN(&time,&(lev->act_time)); |
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170 | ADDUSEC2TIMESPEC(proc_table[INTDRIVE_task].wcet,&time); |
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171 | |||
172 | if (lev->flags == INTDRIVE_CHECK_WCET) |
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173 | lev->wcet_timer = kern_event_post(&time,INTDRIVE_wcet_timer,(void *)lev);*/ |
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174 | } |
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175 | |||
176 | static void INTDRIVE_public_epilogue(LEVEL l, PID p) |
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177 | { |
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178 | |||
179 | struct timespec time; |
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180 | |||
181 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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182 | |||
183 | /*if (lev->wcet_timer != NIL) |
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184 | kern_event_delete(lev->wcet_timer);*/ |
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185 | |||
186 | SUBTIMESPEC(&schedule_time, &(lev->act_time), &time); |
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187 | lev->avail -= TIMESPEC2USEC(&time); |
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188 | TRACER_LOGEVENT(FTrace_EVT_user_event_0, 0, lev->avail + INT_MAX); |
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189 | |||
190 | if (proc_table[INTDRIVE_task].wcet < TIMESPEC2USEC(&time)) { |
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191 | kern_raise(XWCET_VIOLATION,INTDRIVE_task); |
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1018 | mauro | 192 | } |
961 | pj | 193 | } |
194 | |||
195 | static void INTDRIVE_public_activate(LEVEL l, PID p, struct timespec *t) |
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196 | { |
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197 | struct timespec acttime; |
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198 | TIME time, delta_capacity; |
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199 | |||
200 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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201 | |||
202 | if (proc_table[INTDRIVE_task].status == INTDRIVE_WAIT) { |
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203 | |||
204 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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205 | |||
206 | lev->act_number++; |
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207 | |||
208 | } else { |
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209 | |||
210 | if (proc_table[INTDRIVE_task].status == INTDRIVE_IDLE || |
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211 | proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
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212 | proc_table[INTDRIVE_task].status == EXE) { |
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213 | |||
214 | #ifdef INTDRIVE_DEBUG |
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215 | kern_printf("(INTD:WAIT_REC)"); |
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216 | #endif |
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217 | |||
218 | lev->act_number++; |
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219 | |||
220 | } |
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221 | |||
222 | } |
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223 | |||
224 | if (lev->replenish_timer == NIL) { |
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225 | |||
226 | delta_capacity = lev->q_theta - lev->avail; |
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227 | mul32div32to32(delta_capacity, MAX_BANDWIDTH, lev->U, time); |
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228 | kern_gettime(&acttime); |
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229 | ADDUSEC2TIMESPEC(time,&acttime); |
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230 | lev->replenish_timer = kern_event_post(&acttime,INTDRIVE_timer,(void *)lev); |
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231 | |||
232 | /*kern_gettime(&(lev->replenish_expires)); |
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233 | ADDUSEC2TIMESPEC(lev->replenish_period,&(lev->replenish_expires)); |
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234 | lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev);*/ |
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235 | } |
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236 | |||
237 | } |
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238 | |||
239 | static void INTDRIVE_public_unblock(LEVEL l, PID p) |
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240 | { |
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241 | /* Insert task in the correct position */ |
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242 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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243 | |||
244 | } |
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245 | |||
246 | static void INTDRIVE_public_block(LEVEL l, PID p) |
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247 | { |
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248 | |||
249 | } |
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250 | |||
251 | static int INTDRIVE_public_message(LEVEL l, PID p, void *m) |
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252 | { |
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253 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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254 | struct timespec time, acttime; |
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255 | //int delta_time; |
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256 | TIME delta_capacity, delta_time; |
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257 | |||
258 | lev->act_number--; |
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259 | |||
260 | /*if (lev->wcet_timer != NIL) |
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261 | kern_event_delete(lev->wcet_timer);*/ |
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262 | |||
263 | kern_gettime(&acttime); |
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264 | SUBTIMESPEC(&acttime, &(lev->act_time), &time); |
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265 | delta_time = TIMESPEC2USEC(&time); |
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1004 | mauro | 266 | mul32div32to32(delta_time, (MAX_BANDWIDTH-lev->U), MAX_BANDWIDTH, delta_capacity); |
961 | pj | 267 | lev->avail -= delta_capacity; |
268 | |||
269 | //lev->avail -= TIMESPEC2USEC(&time); |
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270 | |||
271 | TRACER_LOGEVENT(FTrace_EVT_user_event_0, 0, lev->avail + INT_MAX); |
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1018 | mauro | 272 | |
961 | pj | 273 | #ifdef INTDRIVE_DEBUG |
274 | kern_printf("(INTD:AV:%d)",(int)(lev->avail)); |
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275 | #endif |
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276 | |||
277 | if (lev->avail < 0) { |
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278 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
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279 | |||
280 | if (lev->replenish_timer != NIL) |
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281 | kern_event_delete(lev->replenish_timer); |
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282 | |||
283 | delta_capacity = lev->q_theta - lev->avail; |
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284 | mul32div32to32(delta_capacity, MAX_BANDWIDTH, lev->U, delta_time); |
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285 | kern_gettime(&acttime); |
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286 | ADDUSEC2TIMESPEC(delta_time,&acttime); |
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287 | lev->replenish_timer = kern_event_post(&acttime,INTDRIVE_timer,(void *)lev); |
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288 | |||
289 | /*temp = -lev->avail; |
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290 | mul32div32to32(temp,lev->replenish_period,lev->capacity,delta_time) |
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291 | ADDUSEC2TIMESPEC(delta_time,&(lev->replenish_expires)); |
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292 | lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev);*/ |
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293 | |||
294 | #ifdef INTDRIVE_DEBUG |
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295 | kern_printf("(INTD:IDLE:%d)",delta_time); |
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296 | #endif |
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297 | |||
298 | } else { |
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299 | if (lev->act_number) { |
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300 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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301 | |||
302 | #ifdef INTDRIVE_DEBUG |
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303 | kern_printf("(INTD:NEXT_ACT)"); |
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304 | #endif |
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305 | |||
306 | } else { |
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307 | |||
308 | #ifdef INTDRIVE_DEBUG |
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309 | kern_printf("(INTD:WAIT_ACT)"); |
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310 | #endif |
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311 | |||
312 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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313 | |||
314 | } |
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315 | } |
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316 | |||
317 | TRACER_LOGEVENT(FTrace_EVT_task_end_cycle, |
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318 | (unsigned short int)proc_table[INTDRIVE_task].context,(unsigned int)l); |
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319 | |||
320 | return 0; |
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321 | } |
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322 | |||
323 | static void INTDRIVE_public_end(LEVEL l, PID p) |
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324 | { |
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325 | |||
326 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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327 | |||
328 | if (lev->replenish_timer != NIL) |
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329 | kern_event_delete(lev->replenish_timer); |
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330 | |||
331 | /*if (lev->wcet_timer != NIL) |
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332 | kern_event_delete(lev->wcet_timer);*/ |
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333 | |||
334 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
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335 | |||
336 | } |
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337 | |||
338 | /* Registration functions */ |
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339 | |||
340 | /*+ Registration function: +*/ |
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1004 | mauro | 341 | LEVEL INTDRIVE_register_level(TIME capacity, TIME q_theta, int U, int flags) |
961 | pj | 342 | { |
343 | LEVEL l; /* the level that we register */ |
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344 | INTDRIVE_level_des *lev; |
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345 | |||
346 | printk("INTDRIVE_register_level\n"); |
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347 | |||
348 | /* request an entry in the level_table */ |
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349 | l = level_alloc_descriptor(sizeof(INTDRIVE_level_des)); |
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350 | |||
351 | lev = (INTDRIVE_level_des *)level_table[l]; |
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352 | |||
353 | lev->l.public_scheduler = INTDRIVE_public_scheduler; |
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354 | lev->l.public_guarantee = NULL; |
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355 | lev->l.public_create = INTDRIVE_public_create; |
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356 | lev->l.public_end = INTDRIVE_public_end; |
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357 | lev->l.public_dispatch = INTDRIVE_public_dispatch; |
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358 | lev->l.public_epilogue = INTDRIVE_public_epilogue; |
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359 | lev->l.public_activate = INTDRIVE_public_activate; |
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360 | lev->l.public_unblock = INTDRIVE_public_unblock; |
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361 | lev->l.public_block = INTDRIVE_public_block; |
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362 | lev->l.public_message = INTDRIVE_public_message; |
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363 | |||
364 | NULL_TIMESPEC(&(lev->act_time)); |
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365 | |||
366 | lev->capacity = capacity; |
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367 | lev->replenish_timer = NIL; |
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368 | lev->flags = flags; |
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369 | lev->act_number = 0; |
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370 | lev->avail = 0; |
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1004 | mauro | 371 | lev->q_theta = q_theta; |
372 | mul32div32to32(MAX_BANDWIDTH,U,10000,lev->U); |
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1018 | mauro | 373 | |
1004 | mauro | 374 | //!!!calcolare parametro |
1018 | mauro | 375 | intdrive_taskinit(l, 10000); |
961 | pj | 376 | |
377 | return l; |
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378 | } |
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379 | |||
380 | bandwidth_t INTDRIVE_usedbandwidth(LEVEL l) |
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381 | { |
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382 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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383 | |||
384 | return lev->U; |
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385 | } |
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386 | |||
387 | TIME INTDRIVE_set_q_theta(LEVEL l, TIME new_q_theta) |
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388 | { |
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389 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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390 | |||
391 | lev->q_theta = new_q_theta; |
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392 | if (lev->q_theta < 0) lev->q_theta = 0; |
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393 | if (lev->q_theta > lev->capacity) lev->q_theta = lev->capacity; |
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394 | |||
395 | return lev->q_theta; |
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396 | } |