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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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755 | giacomo | 152 | proc_table[INTDRIVE_task].avail_time = h->wcet; |
511 | giacomo | 153 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
154 | proc_table[INTDRIVE_task].control &= ~CONTROL_CAP; |
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155 | |||
156 | return 0; |
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157 | |||
158 | } |
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159 | |||
160 | static void INTDRIVE_public_dispatch(LEVEL l, PID p, int nostop) |
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161 | { |
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162 | |||
163 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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164 | struct timespec time; |
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522 | mauro | 165 | |
166 | kern_gettime(&(lev->act_time)); |
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167 | TIMESPEC_ASSIGN(&time,&(lev->act_time)); |
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511 | giacomo | 168 | ADDUSEC2TIMESPEC(proc_table[INTDRIVE_task].wcet,&time); |
169 | |||
699 | giacomo | 170 | if (lev->flags == INTDRIVE_CHECK_WCET) |
171 | lev->wcet_timer = kern_event_post(&time,INTDRIVE_wcet_timer,(void *)lev); |
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172 | |||
511 | giacomo | 173 | } |
174 | |||
175 | static void INTDRIVE_public_epilogue(LEVEL l, PID p) |
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176 | { |
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177 | |||
699 | giacomo | 178 | struct timespec time; |
511 | giacomo | 179 | |
180 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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181 | |||
182 | if (lev->wcet_timer != NIL) |
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183 | kern_event_delete(lev->wcet_timer); |
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184 | |||
699 | giacomo | 185 | SUBTIMESPEC(&schedule_time, &(lev->act_time), &time); |
528 | giacomo | 186 | lev->avail -= TIMESPEC2USEC(&time); |
511 | giacomo | 187 | |
188 | } |
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189 | |||
657 | anton | 190 | static void INTDRIVE_public_activate(LEVEL l, PID p, struct timespec *t) |
511 | giacomo | 191 | { |
192 | |||
193 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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194 | |||
195 | if (proc_table[INTDRIVE_task].status == INTDRIVE_WAIT) { |
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543 | giacomo | 196 | |
511 | giacomo | 197 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
543 | giacomo | 198 | |
199 | lev->act_number++; |
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200 | |||
511 | giacomo | 201 | } else { |
202 | |||
203 | if (proc_table[INTDRIVE_task].status == INTDRIVE_IDLE || |
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543 | giacomo | 204 | proc_table[INTDRIVE_task].status == INTDRIVE_READY || |
205 | proc_table[INTDRIVE_task].status == EXE) { |
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511 | giacomo | 206 | |
207 | #ifdef INTDRIVE_DEBUG |
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208 | kern_printf("(INTD:WAIT_REC)"); |
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209 | #endif |
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210 | |||
211 | lev->act_number++; |
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212 | |||
213 | } |
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214 | |||
215 | } |
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216 | |||
217 | if (lev->replenish_timer == NIL) { |
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524 | giacomo | 218 | |
528 | giacomo | 219 | kern_gettime(&(lev->replenish_expires)); |
220 | ADDUSEC2TIMESPEC(lev->replenish_period,&(lev->replenish_expires)); |
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221 | lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev); |
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524 | giacomo | 222 | |
511 | giacomo | 223 | } |
224 | |||
225 | } |
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226 | |||
227 | static void INTDRIVE_public_unblock(LEVEL l, PID p) |
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228 | { |
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229 | /* Insert task in the correct position */ |
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230 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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231 | |||
232 | } |
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233 | |||
234 | static void INTDRIVE_public_block(LEVEL l, PID p) |
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235 | { |
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236 | |||
237 | } |
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238 | |||
239 | static int INTDRIVE_public_message(LEVEL l, PID p, void *m) |
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240 | { |
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241 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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698 | giacomo | 242 | struct timespec time, acttime; |
528 | giacomo | 243 | int temp,delta_time;; |
511 | giacomo | 244 | |
543 | giacomo | 245 | lev->act_number--; |
246 | |||
511 | giacomo | 247 | if (lev->wcet_timer != NIL) |
248 | kern_event_delete(lev->wcet_timer); |
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249 | |||
698 | giacomo | 250 | kern_gettime(&acttime); |
251 | SUBTIMESPEC(&acttime, &(lev->act_time), &time); |
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528 | giacomo | 252 | lev->avail -= TIMESPEC2USEC(&time); |
511 | giacomo | 253 | |
254 | #ifdef INTDRIVE_DEBUG |
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255 | kern_printf("(INTD:AV:%d)",(int)(lev->avail)); |
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256 | #endif |
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257 | |||
258 | if (lev->avail < 0) { |
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259 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
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528 | giacomo | 260 | temp = -lev->avail; |
261 | mul32div32to32(temp,lev->replenish_period,lev->capacity,delta_time); |
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511 | giacomo | 262 | |
263 | if (lev->replenish_timer != NIL) |
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264 | kern_event_delete(lev->replenish_timer); |
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265 | |||
528 | giacomo | 266 | ADDUSEC2TIMESPEC(delta_time,&(lev->replenish_expires)); lev->replenish_timer = kern_event_post(&(lev->replenish_expires),INTDRIVE_timer,(void *)lev); |
511 | giacomo | 267 | |
268 | #ifdef INTDRIVE_DEBUG |
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528 | giacomo | 269 | kern_printf("(INTD:IDLE:%d)",delta_time); |
511 | giacomo | 270 | #endif |
271 | |||
272 | } else { |
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273 | if (lev->act_number) { |
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274 | proc_table[INTDRIVE_task].status = INTDRIVE_READY; |
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275 | |||
276 | #ifdef INTDRIVE_DEBUG |
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277 | kern_printf("(INTD:NEXT_ACT)"); |
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278 | #endif |
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279 | |||
280 | } else { |
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281 | |||
282 | #ifdef INTDRIVE_DEBUG |
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283 | kern_printf("(INTD:WAIT_ACT)"); |
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284 | #endif |
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285 | |||
286 | proc_table[INTDRIVE_task].status = INTDRIVE_WAIT; |
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287 | |||
288 | } |
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289 | } |
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290 | |||
291 | return 0; |
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522 | mauro | 292 | |
511 | giacomo | 293 | } |
294 | |||
295 | static void INTDRIVE_public_end(LEVEL l, PID p) |
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296 | { |
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297 | |||
298 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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299 | |||
300 | if (lev->replenish_timer != NIL) |
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301 | kern_event_delete(lev->replenish_timer); |
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302 | |||
524 | giacomo | 303 | if (lev->wcet_timer != NIL) |
304 | kern_event_delete(lev->wcet_timer); |
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305 | |||
511 | giacomo | 306 | proc_table[INTDRIVE_task].status = INTDRIVE_IDLE; |
307 | |||
308 | } |
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309 | |||
310 | /* Registration functions */ |
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311 | |||
312 | /*+ Registration function: +*/ |
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313 | LEVEL INTDRIVE_register_level(TIME capacity, TIME replenish_period, int flags) |
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314 | { |
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315 | LEVEL l; /* the level that we register */ |
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316 | INTDRIVE_level_des *lev; |
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317 | |||
318 | printk("INTDRIVE_register_level\n"); |
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319 | |||
320 | /* request an entry in the level_table */ |
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321 | l = level_alloc_descriptor(sizeof(INTDRIVE_level_des)); |
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322 | |||
323 | lev = (INTDRIVE_level_des *)level_table[l]; |
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324 | |||
325 | lev->l.public_scheduler = INTDRIVE_public_scheduler; |
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326 | lev->l.public_guarantee = NULL; |
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327 | lev->l.public_create = INTDRIVE_public_create; |
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328 | lev->l.public_end = INTDRIVE_public_end; |
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329 | lev->l.public_dispatch = INTDRIVE_public_dispatch; |
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330 | lev->l.public_epilogue = INTDRIVE_public_epilogue; |
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331 | lev->l.public_activate = INTDRIVE_public_activate; |
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332 | lev->l.public_unblock = INTDRIVE_public_unblock; |
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333 | lev->l.public_block = INTDRIVE_public_block; |
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334 | lev->l.public_message = INTDRIVE_public_message; |
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335 | |||
522 | mauro | 336 | NULL_TIMESPEC(&(lev->act_time)); |
337 | |||
511 | giacomo | 338 | lev->capacity = capacity; |
339 | lev->replenish_period = replenish_period; |
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340 | lev->replenish_timer = NIL; |
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341 | lev->wcet_timer = NIL; |
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342 | lev->flags = flags; |
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343 | lev->act_number = 0; |
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522 | mauro | 344 | lev->avail = capacity; |
511 | giacomo | 345 | mul32div32to32(MAX_BANDWIDTH,lev->capacity,lev->replenish_period,lev->U); |
346 | |||
347 | return l; |
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348 | } |
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349 | |||
350 | bandwidth_t INTDRIVE_usedbandwidth(LEVEL l) |
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351 | { |
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352 | INTDRIVE_level_des *lev = (INTDRIVE_level_des *)(level_table[l]); |
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353 | |||
354 | return lev->U; |
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355 | } |
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356 |