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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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754 | giacomo | 126 | |
127 | if (INTDRIVE_task == NIL) return NIL; |
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511 | giacomo | 128 | |
129 | if (proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
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130 | proc_table[INTDRIVE_task].status == EXE) |
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131 | return INTDRIVE_task; |
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132 | else |
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133 | return NIL; |
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134 | |||
135 | } |
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136 | |||
137 | static int INTDRIVE_public_create(LEVEL l, PID p, TASK_MODEL *m) |
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138 | { |
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139 | |||
140 | HARD_TASK_MODEL *h; |
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141 | |||
142 | if (m->pclass != HARD_PCLASS) return -1; |
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143 | if (m->level != 0 && m->level != l) return -1; |
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144 | h = (HARD_TASK_MODEL *)m; |
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145 | if (!h->wcet && h->periodicity != INTDRIVE) return -1; |
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146 | |||
147 | if (INTDRIVE_task != NIL) return -1; |
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148 | |||
149 | INTDRIVE_task = p; |
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150 | |||
151 | proc_table[INTDRIVE_task].wcet = h->wcet; |
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152 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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153 | proc_table[INTDRIVE_task].control &= ~CONTROL_CAP; |
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154 | |||
155 | return 0; |
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156 | |||
157 | } |
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158 | |||
159 | static void INTDRIVE_public_dispatch(LEVEL l, PID p, int nostop) |
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160 | { |
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161 | |||
162 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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163 | struct timespec time; |
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522 | mauro | 164 | |
165 | kern_gettime(&(lev->act_time)); |
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166 | TIMESPEC_ASSIGN(&time,&(lev->act_time)); |
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511 | giacomo | 167 | ADDUSEC2TIMESPEC(proc_table[INTDRIVE_task].wcet,&time); |
168 | |||
699 | giacomo | 169 | if (lev->flags == INTDRIVE_CHECK_WCET) |
170 | lev->wcet_timer = kern_event_post(&time,INTDRIVE_wcet_timer,(void *)lev); |
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171 | |||
511 | giacomo | 172 | } |
173 | |||
174 | static void INTDRIVE_public_epilogue(LEVEL l, PID p) |
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175 | { |
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176 | |||
699 | giacomo | 177 | struct timespec time; |
511 | giacomo | 178 | |
179 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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180 | |||
181 | if (lev->wcet_timer != NIL) |
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182 | kern_event_delete(lev->wcet_timer); |
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183 | |||
699 | giacomo | 184 | SUBTIMESPEC(&schedule_time, &(lev->act_time), &time); |
528 | giacomo | 185 | lev->avail -= TIMESPEC2USEC(&time); |
511 | giacomo | 186 | |
187 | } |
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188 | |||
657 | anton | 189 | static void INTDRIVE_public_activate(LEVEL l, PID p, struct timespec *t) |
511 | giacomo | 190 | { |
191 | |||
192 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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193 | |||
194 | if (proc_table[INTDRIVE_task].status == INTDRIVE_WAIT) { |
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543 | giacomo | 195 | |
511 | giacomo | 196 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
543 | giacomo | 197 | |
198 | lev->act_number++; |
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199 | |||
511 | giacomo | 200 | } else { |
201 | |||
202 | if (proc_table[INTDRIVE_task].status == INTDRIVE_IDLE || |
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543 | giacomo | 203 | proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
204 | proc_table[INTDRIVE_task].status == EXE) { |
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511 | giacomo | 205 | |
206 | #ifdef INTDRIVE_DEBUG |
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207 | kern_printf("(INTD:WAIT_REC)"); |
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208 | #endif |
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209 | |||
210 | lev->act_number++; |
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211 | |||
212 | } |
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213 | |||
214 | } |
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215 | |||
216 | if (lev->replenish_timer == NIL) { |
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524 | giacomo | 217 | |
528 | giacomo | 218 | kern_gettime(&(lev->replenish_expires)); |
219 | ADDUSEC2TIMESPEC(lev->replenish_period,&(lev->replenish_expires)); |
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220 | lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev); |
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524 | giacomo | 221 | |
511 | giacomo | 222 | } |
223 | |||
224 | } |
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225 | |||
226 | static void INTDRIVE_public_unblock(LEVEL l, PID p) |
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227 | { |
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228 | /* Insert task in the correct position */ |
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229 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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230 | |||
231 | } |
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232 | |||
233 | static void INTDRIVE_public_block(LEVEL l, PID p) |
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234 | { |
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235 | |||
236 | } |
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237 | |||
238 | static int INTDRIVE_public_message(LEVEL l, PID p, void *m) |
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239 | { |
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240 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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698 | giacomo | 241 | struct timespec time, acttime; |
528 | giacomo | 242 | int temp,delta_time;; |
511 | giacomo | 243 | |
543 | giacomo | 244 | lev->act_number--; |
245 | |||
511 | giacomo | 246 | if (lev->wcet_timer != NIL) |
247 | kern_event_delete(lev->wcet_timer); |
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248 | |||
698 | giacomo | 249 | kern_gettime(&acttime); |
250 | SUBTIMESPEC(&acttime, &(lev->act_time), &time); |
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528 | giacomo | 251 | lev->avail -= TIMESPEC2USEC(&time); |
511 | giacomo | 252 | |
253 | #ifdef INTDRIVE_DEBUG |
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254 | kern_printf("(INTD:AV:%d)",(int)(lev->avail)); |
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255 | #endif |
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256 | |||
257 | if (lev->avail < 0) { |
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258 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
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528 | giacomo | 259 | temp = -lev->avail; |
260 | mul32div32to32(temp,lev->replenish_period,lev->capacity,delta_time); |
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511 | giacomo | 261 | |
262 | if (lev->replenish_timer != NIL) |
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263 | kern_event_delete(lev->replenish_timer); |
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264 | |||
528 | giacomo | 265 | ADDUSEC2TIMESPEC(delta_time,&(lev->replenish_expires)); lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev); |
511 | giacomo | 266 | |
267 | #ifdef INTDRIVE_DEBUG |
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528 | giacomo | 268 | kern_printf("(INTD:IDLE:%d)",delta_time); |
511 | giacomo | 269 | #endif |
270 | |||
271 | } else { |
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272 | if (lev->act_number) { |
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273 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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274 | |||
275 | #ifdef INTDRIVE_DEBUG |
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276 | kern_printf("(INTD:NEXT_ACT)"); |
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277 | #endif |
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278 | |||
279 | } else { |
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280 | |||
281 | #ifdef INTDRIVE_DEBUG |
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282 | kern_printf("(INTD:WAIT_ACT)"); |
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283 | #endif |
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284 | |||
285 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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286 | |||
287 | } |
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288 | } |
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289 | |||
290 | return 0; |
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522 | mauro | 291 | |
511 | giacomo | 292 | } |
293 | |||
294 | static void INTDRIVE_public_end(LEVEL l, PID p) |
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295 | { |
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296 | |||
297 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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298 | |||
299 | if (lev->replenish_timer != NIL) |
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300 | kern_event_delete(lev->replenish_timer); |
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301 | |||
524 | giacomo | 302 | if (lev->wcet_timer != NIL) |
303 | kern_event_delete(lev->wcet_timer); |
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304 | |||
511 | giacomo | 305 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
306 | |||
307 | } |
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308 | |||
309 | /* Registration functions */ |
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310 | |||
311 | /*+ Registration function: +*/ |
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312 | LEVEL INTDRIVE_register_level(TIME capacity, TIME replenish_period, int flags) |
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313 | { |
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314 | LEVEL l; /* the level that we register */ |
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315 | INTDRIVE_level_des *lev; |
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316 | |||
317 | printk("INTDRIVE_register_level\n"); |
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318 | |||
319 | /* request an entry in the level_table */ |
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320 | l = level_alloc_descriptor(sizeof(INTDRIVE_level_des)); |
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321 | |||
322 | lev = (INTDRIVE_level_des *)level_table[l]; |
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323 | |||
324 | lev->l.public_scheduler = INTDRIVE_public_scheduler; |
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325 | lev->l.public_guarantee = NULL; |
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326 | lev->l.public_create = INTDRIVE_public_create; |
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327 | lev->l.public_end = INTDRIVE_public_end; |
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328 | lev->l.public_dispatch = INTDRIVE_public_dispatch; |
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329 | lev->l.public_epilogue = INTDRIVE_public_epilogue; |
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330 | lev->l.public_activate = INTDRIVE_public_activate; |
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331 | lev->l.public_unblock = INTDRIVE_public_unblock; |
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332 | lev->l.public_block = INTDRIVE_public_block; |
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333 | lev->l.public_message = INTDRIVE_public_message; |
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334 | |||
522 | mauro | 335 | NULL_TIMESPEC(&(lev->act_time)); |
336 | |||
511 | giacomo | 337 | lev->capacity = capacity; |
338 | lev->replenish_period = replenish_period; |
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339 | lev->replenish_timer = NIL; |
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340 | lev->wcet_timer = NIL; |
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341 | lev->flags = flags; |
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342 | lev->act_number = 0; |
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522 | mauro | 343 | lev->avail = capacity; |
511 | giacomo | 344 | mul32div32to32(MAX_BANDWIDTH,lev->capacity,lev->replenish_period,lev->U); |
345 | |||
346 | return l; |
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347 | } |
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348 | |||
349 | bandwidth_t INTDRIVE_usedbandwidth(LEVEL l) |
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350 | { |
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351 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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352 | |||
353 | return lev->U; |
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354 | } |
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355 |