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511 | giacomo | 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 <modules/intdrive.h> |
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41 | #include <kernel/model.h> |
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42 | #include <kernel/descr.h> |
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43 | #include <kernel/var.h> |
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44 | #include <kernel/func.h> |
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45 | |||
46 | #include <ll/i386/64bit.h> |
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47 | |||
776 | giacomo | 48 | #include <tracer.h> |
49 | |||
511 | giacomo | 50 | /*+ Status used in the level +*/ |
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 | |||
522 | mauro | 65 | struct timespec act_time; |
66 | |||
511 | giacomo | 67 | int avail; |
68 | |||
528 | giacomo | 69 | struct timespec replenish_expires; |
511 | giacomo | 70 | int replenish_timer; |
71 | int wcet_timer; |
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72 | |||
73 | int act_number; /*+ the activation number +*/ |
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74 | |||
75 | int flags; /*+ the init flags... +*/ |
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76 | |||
77 | bandwidth_t U; /*+ the used bandwidth +*/ |
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78 | |||
79 | } INTDRIVE_level_des; |
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80 | |||
81 | PID INTDRIVE_task = NIL; |
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82 | |||
83 | /* Replenish the capacity */ |
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84 | static void INTDRIVE_timer(void *arg) |
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85 | { |
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86 | |||
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->capacity; |
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98 | |||
99 | switch (proc_table[INTDRIVE_task].status) { |
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100 | |||
101 | case INTDRIVE_IDLE: |
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102 | if (lev->act_number) { |
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103 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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104 | event_need_reschedule(); |
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105 | } else { |
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106 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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107 | } |
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108 | break; |
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109 | |||
110 | } |
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111 | |||
112 | } |
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113 | |||
114 | |||
115 | static void INTDRIVE_wcet_timer(void *arg) |
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116 | { |
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117 | |||
118 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(arg); |
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119 | |||
120 | lev->wcet_timer = NIL; |
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121 | |||
122 | kern_raise(XWCET_VIOLATION,INTDRIVE_task); |
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123 | |||
124 | } |
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125 | |||
126 | static PID INTDRIVE_public_scheduler(LEVEL l) |
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127 | { |
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754 | giacomo | 128 | |
129 | if (INTDRIVE_task == NIL) return NIL; |
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511 | giacomo | 130 | |
131 | if (proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
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132 | proc_table[INTDRIVE_task].status == EXE) |
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133 | return INTDRIVE_task; |
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134 | else |
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135 | return NIL; |
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136 | |||
137 | } |
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138 | |||
139 | static int INTDRIVE_public_create(LEVEL l, PID p, TASK_MODEL *m) |
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140 | { |
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141 | |||
142 | HARD_TASK_MODEL *h; |
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143 | |||
144 | if (m->pclass != HARD_PCLASS) return -1; |
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145 | if (m->level != 0 && m->level != l) return -1; |
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146 | h = (HARD_TASK_MODEL *)m; |
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147 | if (!h->wcet && h->periodicity != INTDRIVE) return -1; |
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148 | |||
149 | if (INTDRIVE_task != NIL) return -1; |
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150 | |||
151 | INTDRIVE_task = p; |
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152 | |||
153 | proc_table[INTDRIVE_task].wcet = h->wcet; |
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755 | giacomo | 154 | proc_table[INTDRIVE_task].avail_time = h->wcet; |
511 | giacomo | 155 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
156 | proc_table[INTDRIVE_task].control &= ~CONTROL_CAP; |
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157 | |||
158 | return 0; |
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159 | |||
160 | } |
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161 | |||
162 | static void INTDRIVE_public_dispatch(LEVEL l, PID p, int nostop) |
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163 | { |
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164 | |||
165 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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166 | struct timespec time; |
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522 | mauro | 167 | |
168 | kern_gettime(&(lev->act_time)); |
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169 | TIMESPEC_ASSIGN(&time,&(lev->act_time)); |
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511 | giacomo | 170 | ADDUSEC2TIMESPEC(proc_table[INTDRIVE_task].wcet,&time); |
171 | |||
699 | giacomo | 172 | if (lev->flags == INTDRIVE_CHECK_WCET) |
173 | lev->wcet_timer = kern_event_post(&time,INTDRIVE_wcet_timer,(void *)lev); |
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174 | |||
511 | giacomo | 175 | } |
176 | |||
177 | static void INTDRIVE_public_epilogue(LEVEL l, PID p) |
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178 | { |
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179 | |||
699 | giacomo | 180 | struct timespec time; |
511 | giacomo | 181 | |
182 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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183 | |||
184 | if (lev->wcet_timer != NIL) |
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185 | kern_event_delete(lev->wcet_timer); |
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186 | |||
699 | giacomo | 187 | SUBTIMESPEC(&schedule_time, &(lev->act_time), &time); |
528 | giacomo | 188 | lev->avail -= TIMESPEC2USEC(&time); |
511 | giacomo | 189 | |
190 | } |
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191 | |||
657 | anton | 192 | static void INTDRIVE_public_activate(LEVEL l, PID p, struct timespec *t) |
511 | giacomo | 193 | { |
194 | |||
195 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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196 | |||
197 | if (proc_table[INTDRIVE_task].status == INTDRIVE_WAIT) { |
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543 | giacomo | 198 | |
511 | giacomo | 199 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
543 | giacomo | 200 | |
201 | lev->act_number++; |
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202 | |||
511 | giacomo | 203 | } else { |
204 | |||
205 | if (proc_table[INTDRIVE_task].status == INTDRIVE_IDLE || |
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543 | giacomo | 206 | proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
207 | proc_table[INTDRIVE_task].status == EXE) { |
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511 | giacomo | 208 | |
209 | #ifdef INTDRIVE_DEBUG |
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210 | kern_printf("(INTD:WAIT_REC)"); |
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211 | #endif |
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212 | |||
213 | lev->act_number++; |
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214 | |||
215 | } |
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216 | |||
217 | } |
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218 | |||
219 | if (lev->replenish_timer == NIL) { |
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524 | giacomo | 220 | |
528 | giacomo | 221 | kern_gettime(&(lev->replenish_expires)); |
222 | ADDUSEC2TIMESPEC(lev->replenish_period,&(lev->replenish_expires)); |
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223 | lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev); |
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524 | giacomo | 224 | |
511 | giacomo | 225 | } |
226 | |||
227 | } |
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228 | |||
229 | static void INTDRIVE_public_unblock(LEVEL l, PID p) |
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230 | { |
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231 | /* Insert task in the correct position */ |
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232 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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233 | |||
234 | } |
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235 | |||
236 | static void INTDRIVE_public_block(LEVEL l, PID p) |
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237 | { |
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238 | |||
239 | } |
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240 | |||
241 | static int INTDRIVE_public_message(LEVEL l, PID p, void *m) |
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242 | { |
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243 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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698 | giacomo | 244 | struct timespec time, acttime; |
528 | giacomo | 245 | int temp,delta_time;; |
511 | giacomo | 246 | |
543 | giacomo | 247 | lev->act_number--; |
248 | |||
511 | giacomo | 249 | if (lev->wcet_timer != NIL) |
250 | kern_event_delete(lev->wcet_timer); |
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251 | |||
698 | giacomo | 252 | kern_gettime(&acttime); |
253 | SUBTIMESPEC(&acttime, &(lev->act_time), &time); |
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528 | giacomo | 254 | lev->avail -= TIMESPEC2USEC(&time); |
511 | giacomo | 255 | |
256 | #ifdef INTDRIVE_DEBUG |
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257 | kern_printf("(INTD:AV:%d)",(int)(lev->avail)); |
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258 | #endif |
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259 | |||
260 | if (lev->avail < 0) { |
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261 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
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528 | giacomo | 262 | temp = -lev->avail; |
263 | mul32div32to32(temp,lev->replenish_period,lev->capacity,delta_time); |
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511 | giacomo | 264 | |
265 | if (lev->replenish_timer != NIL) |
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266 | kern_event_delete(lev->replenish_timer); |
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267 | |||
528 | giacomo | 268 | ADDUSEC2TIMESPEC(delta_time,&(lev->replenish_expires)); lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev); |
511 | giacomo | 269 | |
270 | #ifdef INTDRIVE_DEBUG |
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528 | giacomo | 271 | kern_printf("(INTD:IDLE:%d)",delta_time); |
511 | giacomo | 272 | #endif |
273 | |||
274 | } else { |
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275 | if (lev->act_number) { |
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276 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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277 | |||
278 | #ifdef INTDRIVE_DEBUG |
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279 | kern_printf("(INTD:NEXT_ACT)"); |
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280 | #endif |
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281 | |||
282 | } else { |
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283 | |||
284 | #ifdef INTDRIVE_DEBUG |
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285 | kern_printf("(INTD:WAIT_ACT)"); |
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286 | #endif |
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287 | |||
288 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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289 | |||
290 | } |
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291 | } |
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292 | |||
776 | giacomo | 293 | TRACER_LOGEVENT(FTrace_EVT_task_end_cycle, |
294 | (unsigned short int)proc_table[INTDRIVE_task].context,(unsigned int)l); |
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295 | |||
511 | giacomo | 296 | return 0; |
522 | mauro | 297 | |
511 | giacomo | 298 | } |
299 | |||
300 | static void INTDRIVE_public_end(LEVEL l, PID p) |
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301 | { |
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302 | |||
303 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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304 | |||
305 | if (lev->replenish_timer != NIL) |
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306 | kern_event_delete(lev->replenish_timer); |
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307 | |||
524 | giacomo | 308 | if (lev->wcet_timer != NIL) |
309 | kern_event_delete(lev->wcet_timer); |
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310 | |||
511 | giacomo | 311 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
312 | |||
313 | } |
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314 | |||
315 | /* Registration functions */ |
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316 | |||
317 | /*+ Registration function: +*/ |
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318 | LEVEL INTDRIVE_register_level(TIME capacity, TIME replenish_period, int flags) |
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319 | { |
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320 | LEVEL l; /* the level that we register */ |
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321 | INTDRIVE_level_des *lev; |
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322 | |||
323 | printk("INTDRIVE_register_level\n"); |
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324 | |||
325 | /* request an entry in the level_table */ |
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326 | l = level_alloc_descriptor(sizeof(INTDRIVE_level_des)); |
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327 | |||
328 | lev = (INTDRIVE_level_des *)level_table[l]; |
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329 | |||
330 | lev->l.public_scheduler = INTDRIVE_public_scheduler; |
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331 | lev->l.public_guarantee = NULL; |
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332 | lev->l.public_create = INTDRIVE_public_create; |
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333 | lev->l.public_end = INTDRIVE_public_end; |
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334 | lev->l.public_dispatch = INTDRIVE_public_dispatch; |
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335 | lev->l.public_epilogue = INTDRIVE_public_epilogue; |
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336 | lev->l.public_activate = INTDRIVE_public_activate; |
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337 | lev->l.public_unblock = INTDRIVE_public_unblock; |
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338 | lev->l.public_block = INTDRIVE_public_block; |
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339 | lev->l.public_message = INTDRIVE_public_message; |
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340 | |||
522 | mauro | 341 | NULL_TIMESPEC(&(lev->act_time)); |
342 | |||
511 | giacomo | 343 | lev->capacity = capacity; |
344 | lev->replenish_period = replenish_period; |
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345 | lev->replenish_timer = NIL; |
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346 | lev->wcet_timer = NIL; |
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347 | lev->flags = flags; |
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348 | lev->act_number = 0; |
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522 | mauro | 349 | lev->avail = capacity; |
511 | giacomo | 350 | mul32div32to32(MAX_BANDWIDTH,lev->capacity,lev->replenish_period,lev->U); |
351 | |||
352 | return l; |
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353 | } |
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354 | |||
355 | bandwidth_t INTDRIVE_usedbandwidth(LEVEL l) |
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356 | { |
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357 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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358 | |||
359 | return lev->U; |
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360 | } |
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361 |