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| 1658 | 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 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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| 11 | * Luca Abeni <luca@gandalf.sssup.it> |
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| 12 | * (see the web pages for full authors list) |
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| 13 | * |
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| 14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 15 | * |
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| 16 | * http://www.sssup.it |
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| 17 | * http://retis.sssup.it |
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| 18 | * http://shark.sssup.it |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | ------------ |
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| 23 | CVS : $Id: edfstar.h,v 1.1 2004-06-01 11:42:43 giacomo Exp $ |
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| 24 | |||
| 25 | File: $File$ |
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| 26 | Revision: $Revision: 1.1 $ |
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| 27 | Last update: $Date: 2004-06-01 11:42:43 $ |
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| 28 | ------------ |
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| 29 | |||
| 30 | Title: |
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| 31 | EDFSTAR |
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| 32 | |||
| 33 | Task Models Accepted: |
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| 34 | HARD_TASK_MODEL - Hard Tasks (only Periodic) |
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| 35 | wcet field and mit field must be != 0. They are used to set the wcet |
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| 36 | and period of the tasks. |
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| 37 | periodicity field can be only PERIODIC |
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| 38 | drel field is ignored |
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| 39 | |||
| 40 | Guest Models Accepted: |
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| 41 | JOB_TASK_MODEL - a single guest task activation |
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| 42 | Identified by an absolute deadline and a period. |
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| 43 | period field is ignored |
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| 44 | |||
| 45 | Description: |
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| 46 | |||
| 47 | This module schedule his tasks following the classic EDF |
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| 48 | scheme. This module is derived from the EDFACT Scheduling Module. |
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| 49 | |||
| 50 | This module can not stay alone: when it have to schedule a task, it |
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| 51 | simply inserts it into another master module using a |
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| 52 | BUDGET_TASK_MODEL. |
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| 53 | |||
| 54 | No Task guarantee is performed at all. |
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| 55 | The tasks scheduled are only periodic. |
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| 56 | All the task are put in a queue and the scheduling is based on the |
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| 57 | deadline value. |
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| 58 | If a task miss a deadline a counter is incremented. |
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| 59 | If a task exausts the wcet a counter is incremented |
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| 60 | No ZOMBIE support!!!!!! |
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| 61 | |||
| 62 | Exceptions raised: |
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| 63 | XUNVALID_GUEST XUNVALID_TASK |
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| 64 | some primitives are not implemented: |
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| 65 | task_sleep, task_delay, guest_endcycle, guest_sleep, guest_delay |
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| 66 | |||
| 67 | XACTIVATION |
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| 68 | If a task is actiated through task_activate or guest_activate more than |
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| 69 | one time |
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| 70 | |||
| 71 | Restrictions & special features: |
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| 72 | - This level doesn't manage the main task. |
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| 73 | - Functions to return and reset the nact, wcet and dline miss |
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| 74 | counters are provided |
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| 75 | |||
| 76 | **/ |
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| 77 | |||
| 78 | /* |
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| 79 | * Copyright (C) 2001 Paolo Gai |
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| 80 | * |
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| 81 | * This program is free software; you can redistribute it and/or modify |
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| 82 | * it under the terms of the GNU General Public License as published by |
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| 83 | * the Free Software Foundation; either version 2 of the License, or |
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| 84 | * (at your option) any later version. |
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| 85 | * |
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| 86 | * This program is distributed in the hope that it will be useful, |
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| 87 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 88 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 89 | * GNU General Public License for more details. |
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| 90 | * |
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| 91 | * You should have received a copy of the GNU General Public License |
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| 92 | * along with this program; if not, write to the Free Software |
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| 93 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 94 | * |
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| 95 | */ |
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| 96 | |||
| 97 | |||
| 98 | #ifndef __EDFSTAR_H__ |
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| 99 | #define __EDFSTAR_H__ |
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| 100 | |||
| 101 | #include <ll/ll.h> |
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| 102 | #include <kernel/config.h> |
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| 103 | #include <sys/types.h> |
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| 104 | #include <kernel/types.h> |
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| 105 | |||
| 106 | |||
| 107 | |||
| 108 | /* flags... */ |
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| 109 | #define EDFSTAR_ENABLE_GUARANTEE 1 /* Task Guarantee enabled */ |
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| 110 | #define EDFSTAR_ENABLE_ALL 1 |
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| 111 | |||
| 112 | #define EDFSTAR_FAILED_GUARANTEE 8 /* used in the module, unsettabl |
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| 113 | in EDF_register_level... */ |
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| 114 | |||
| 115 | |||
| 116 | |||
| 117 | #define EDFSTAR_LEVELNAME "EDFSTAR base" |
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| 118 | #define EDFSTAR_LEVEL_CODE 166 |
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| 119 | #define EDFSTAR_LEVEL_VERSION 1 |
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| 120 | |||
| 121 | |||
| 122 | /* Registration function: |
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| 123 | int budget The budget used by this module (see CBSSTAR.h) |
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| 124 | int master The master module used by EDFSTAR |
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| 125 | */ |
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| 126 | LEVEL EDFSTAR_register_level(int budget, int master); |
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| 127 | |||
| 128 | /* returns respectively the number of dline, wcet or nact; -1 if error */ |
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| 129 | int EDFSTAR_get_dline_miss(PID p); |
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| 130 | int EDFSTAR_get_wcet_miss(PID p); |
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| 131 | int EDFSTAR_get_nact(PID p); |
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| 132 | |||
| 133 | /* resets respectively the number of dline, wcet miss; -1 if error */ |
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| 134 | int EDFSTAR_reset_dline_miss(PID p); |
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| 135 | int EDFSTAR_reset_wcet_miss(PID p); |
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| 136 | |||
| 137 | #endif |
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| 138 |