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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 | |||
48 | /*+ Status used in the level +*/ |
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49 | #define INTDRIVE_READY MODULE_STATUS_BASE /*+ - Ready status +*/ |
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50 | #define INTDRIVE_WCET_VIOLATED MODULE_STATUS_BASE+2 /*+ when wcet is finished +*/ |
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51 | #define INTDRIVE_IDLE MODULE_STATUS_BASE+3 /*+ to wait the replenish +*/ |
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52 | #define INTDRIVE_WAIT MODULE_STATUS_BASE+4 /*+ to wait the activation */ |
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53 | |||
54 | //#define INTDRIVE_DEBUG |
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55 | |||
56 | /*+ the level redefinition for the IntDrive +*/ |
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57 | typedef struct { |
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58 | level_des l; /*+ the standard level descriptor +*/ |
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59 | |||
60 | TIME replenish_period; |
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61 | TIME capacity; |
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62 | |||
522 | mauro | 63 | struct timespec act_time; |
64 | |||
511 | giacomo | 65 | int avail; |
66 | |||
528 | giacomo | 67 | struct timespec replenish_expires; |
511 | giacomo | 68 | int replenish_timer; |
69 | int wcet_timer; |
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70 | |||
71 | int act_number; /*+ the activation number +*/ |
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72 | |||
73 | int flags; /*+ the init flags... +*/ |
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74 | |||
75 | bandwidth_t U; /*+ the used bandwidth +*/ |
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76 | |||
77 | } INTDRIVE_level_des; |
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78 | |||
79 | PID INTDRIVE_task = NIL; |
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80 | |||
81 | /* Replenish the capacity */ |
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82 | static void INTDRIVE_timer(void *arg) |
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83 | { |
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84 | |||
85 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(arg); |
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86 | |||
87 | lev->replenish_timer = NIL; |
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88 | |||
89 | #ifdef INTDRIVE_DEBUG |
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90 | kern_printf("(INTD:TIMER)"); |
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91 | #endif |
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92 | |||
93 | if (INTDRIVE_task == NIL) return; |
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94 | |||
95 | lev->avail = lev->capacity; |
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96 | |||
97 | switch (proc_table[INTDRIVE_task].status) { |
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98 | |||
99 | case INTDRIVE_IDLE: |
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100 | if (lev->act_number) { |
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101 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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102 | event_need_reschedule(); |
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103 | } else { |
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104 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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105 | } |
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106 | break; |
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107 | |||
108 | } |
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109 | |||
110 | } |
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111 | |||
112 | |||
113 | static void INTDRIVE_wcet_timer(void *arg) |
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114 | { |
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115 | |||
116 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(arg); |
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117 | |||
118 | lev->wcet_timer = NIL; |
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119 | |||
120 | kern_raise(XWCET_VIOLATION,INTDRIVE_task); |
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121 | |||
122 | } |
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123 | |||
124 | static PID INTDRIVE_public_scheduler(LEVEL l) |
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125 | { |
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126 | |||
127 | if (proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
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128 | proc_table[INTDRIVE_task].status == EXE) |
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129 | return INTDRIVE_task; |
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130 | else |
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131 | return NIL; |
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132 | |||
133 | } |
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134 | |||
135 | static int INTDRIVE_public_create(LEVEL l, PID p, TASK_MODEL *m) |
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136 | { |
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137 | |||
138 | HARD_TASK_MODEL *h; |
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139 | |||
140 | if (m->pclass != HARD_PCLASS) return -1; |
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141 | if (m->level != 0 && m->level != l) return -1; |
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142 | h = (HARD_TASK_MODEL *)m; |
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143 | if (!h->wcet && h->periodicity != INTDRIVE) return -1; |
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144 | |||
145 | if (INTDRIVE_task != NIL) return -1; |
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146 | |||
147 | INTDRIVE_task = p; |
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148 | |||
149 | proc_table[INTDRIVE_task].wcet = h->wcet; |
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150 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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151 | proc_table[INTDRIVE_task].control &= ~CONTROL_CAP; |
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152 | |||
153 | return 0; |
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154 | |||
155 | } |
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156 | |||
157 | static void INTDRIVE_public_dispatch(LEVEL l, PID p, int nostop) |
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158 | { |
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159 | |||
160 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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161 | struct timespec time; |
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522 | mauro | 162 | |
163 | kern_gettime(&(lev->act_time)); |
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164 | TIMESPEC_ASSIGN(&time,&(lev->act_time)); |
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511 | giacomo | 165 | ADDUSEC2TIMESPEC(proc_table[INTDRIVE_task].wcet,&time); |
166 | |||
167 | lev->wcet_timer = kern_event_post(&time,INTDRIVE_wcet_timer,(void *)lev); |
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168 | |||
169 | } |
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170 | |||
171 | static void INTDRIVE_public_epilogue(LEVEL l, PID p) |
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172 | { |
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173 | |||
174 | struct timespec time; |
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175 | |||
176 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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177 | |||
178 | if (lev->wcet_timer != NIL) |
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179 | kern_event_delete(lev->wcet_timer); |
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180 | |||
522 | mauro | 181 | SUBTIMESPEC(&schedule_time, &(lev->act_time), &time); |
528 | giacomo | 182 | lev->avail -= TIMESPEC2USEC(&time); |
511 | giacomo | 183 | |
184 | } |
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185 | |||
657 | anton | 186 | static void INTDRIVE_public_activate(LEVEL l, PID p, struct timespec *t) |
511 | giacomo | 187 | { |
188 | |||
189 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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190 | |||
191 | if (proc_table[INTDRIVE_task].status == INTDRIVE_WAIT) { |
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543 | giacomo | 192 | |
511 | giacomo | 193 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
543 | giacomo | 194 | |
195 | lev->act_number++; |
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196 | |||
511 | giacomo | 197 | } else { |
198 | |||
199 | if (proc_table[INTDRIVE_task].status == INTDRIVE_IDLE || |
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543 | giacomo | 200 | proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
201 | proc_table[INTDRIVE_task].status == EXE) { |
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511 | giacomo | 202 | |
203 | #ifdef INTDRIVE_DEBUG |
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204 | kern_printf("(INTD:WAIT_REC)"); |
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205 | #endif |
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206 | |||
207 | lev->act_number++; |
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208 | |||
209 | } |
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210 | |||
211 | } |
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212 | |||
213 | if (lev->replenish_timer == NIL) { |
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524 | giacomo | 214 | |
528 | giacomo | 215 | kern_gettime(&(lev->replenish_expires)); |
216 | ADDUSEC2TIMESPEC(lev->replenish_period,&(lev->replenish_expires)); |
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217 | lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev); |
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524 | giacomo | 218 | |
511 | giacomo | 219 | } |
220 | |||
221 | } |
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222 | |||
223 | static void INTDRIVE_public_unblock(LEVEL l, PID p) |
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224 | { |
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225 | /* Insert task in the correct position */ |
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226 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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227 | |||
228 | } |
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229 | |||
230 | static void INTDRIVE_public_block(LEVEL l, PID p) |
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231 | { |
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232 | |||
233 | } |
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234 | |||
235 | static int INTDRIVE_public_message(LEVEL l, PID p, void *m) |
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236 | { |
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237 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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238 | struct timespec time; |
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528 | giacomo | 239 | int temp,delta_time;; |
511 | giacomo | 240 | |
543 | giacomo | 241 | lev->act_number--; |
242 | |||
511 | giacomo | 243 | if (lev->wcet_timer != NIL) |
244 | kern_event_delete(lev->wcet_timer); |
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245 | |||
522 | mauro | 246 | SUBTIMESPEC(&schedule_time, &(lev->act_time), &time); |
528 | giacomo | 247 | lev->avail -= TIMESPEC2USEC(&time); |
511 | giacomo | 248 | |
249 | #ifdef INTDRIVE_DEBUG |
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250 | kern_printf("(INTD:AV:%d)",(int)(lev->avail)); |
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251 | #endif |
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252 | |||
253 | if (lev->avail < 0) { |
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254 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
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528 | giacomo | 255 | temp = -lev->avail; |
256 | mul32div32to32(temp,lev->replenish_period,lev->capacity,delta_time); |
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511 | giacomo | 257 | |
258 | if (lev->replenish_timer != NIL) |
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259 | kern_event_delete(lev->replenish_timer); |
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260 | |||
528 | giacomo | 261 | ADDUSEC2TIMESPEC(delta_time,&(lev->replenish_expires)); lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev); |
511 | giacomo | 262 | |
263 | #ifdef INTDRIVE_DEBUG |
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528 | giacomo | 264 | kern_printf("(INTD:IDLE:%d)",delta_time); |
511 | giacomo | 265 | #endif |
266 | |||
267 | } else { |
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268 | if (lev->act_number) { |
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269 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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270 | |||
271 | #ifdef INTDRIVE_DEBUG |
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272 | kern_printf("(INTD:NEXT_ACT)"); |
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273 | #endif |
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274 | |||
275 | } else { |
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276 | |||
277 | #ifdef INTDRIVE_DEBUG |
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278 | kern_printf("(INTD:WAIT_ACT)"); |
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279 | #endif |
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280 | |||
281 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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282 | |||
283 | } |
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284 | } |
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285 | |||
286 | return 0; |
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522 | mauro | 287 | |
511 | giacomo | 288 | } |
289 | |||
290 | static void INTDRIVE_public_end(LEVEL l, PID p) |
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291 | { |
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292 | |||
293 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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294 | |||
295 | if (lev->replenish_timer != NIL) |
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296 | kern_event_delete(lev->replenish_timer); |
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297 | |||
524 | giacomo | 298 | if (lev->wcet_timer != NIL) |
299 | kern_event_delete(lev->wcet_timer); |
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300 | |||
511 | giacomo | 301 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
302 | |||
303 | } |
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304 | |||
305 | /* Registration functions */ |
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306 | |||
307 | /*+ Registration function: +*/ |
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308 | LEVEL INTDRIVE_register_level(TIME capacity, TIME replenish_period, int flags) |
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309 | { |
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310 | LEVEL l; /* the level that we register */ |
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311 | INTDRIVE_level_des *lev; |
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312 | |||
313 | printk("INTDRIVE_register_level\n"); |
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314 | |||
315 | /* request an entry in the level_table */ |
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316 | l = level_alloc_descriptor(sizeof(INTDRIVE_level_des)); |
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317 | |||
318 | lev = (INTDRIVE_level_des *)level_table[l]; |
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319 | |||
320 | lev->l.public_scheduler = INTDRIVE_public_scheduler; |
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321 | lev->l.public_guarantee = NULL; |
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322 | lev->l.public_create = INTDRIVE_public_create; |
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323 | lev->l.public_end = INTDRIVE_public_end; |
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324 | lev->l.public_dispatch = INTDRIVE_public_dispatch; |
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325 | lev->l.public_epilogue = INTDRIVE_public_epilogue; |
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326 | lev->l.public_activate = INTDRIVE_public_activate; |
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327 | lev->l.public_unblock = INTDRIVE_public_unblock; |
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328 | lev->l.public_block = INTDRIVE_public_block; |
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329 | lev->l.public_message = INTDRIVE_public_message; |
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330 | |||
522 | mauro | 331 | NULL_TIMESPEC(&(lev->act_time)); |
332 | |||
511 | giacomo | 333 | lev->capacity = capacity; |
334 | lev->replenish_period = replenish_period; |
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335 | lev->replenish_timer = NIL; |
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336 | lev->wcet_timer = NIL; |
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337 | lev->flags = flags; |
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338 | lev->act_number = 0; |
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522 | mauro | 339 | lev->avail = capacity; |
511 | giacomo | 340 | mul32div32to32(MAX_BANDWIDTH,lev->capacity,lev->replenish_period,lev->U); |
341 | |||
342 | return l; |
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343 | } |
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344 | |||
345 | bandwidth_t INTDRIVE_usedbandwidth(LEVEL l) |
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346 | { |
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347 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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348 | |||
349 | return lev->U; |
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350 | } |
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351 |