Rev 1089 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1089 | pj | 1 | /* |
2 | * Project: S.Ha.R.K. |
||
3 | * |
||
4 | * Coordinators: |
||
5 | * Giorgio Buttazzo <giorgio@sssup.it> |
||
6 | * Paolo Gai <pj@gandalf.sssup.it> |
||
7 | * |
||
8 | * Authors : |
||
9 | * Paolo Gai <pj@gandalf.sssup.it> |
||
10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
||
11 | * Luca Abeni <luca@gandalf.sssup.it> |
||
12 | * (see the web pages for full authors list) |
||
13 | * |
||
14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
||
15 | * |
||
16 | * http://www.sssup.it |
||
17 | * http://retis.sssup.it |
||
18 | * http://shark.sssup.it |
||
19 | */ |
||
20 | |||
21 | /** |
||
22 | ------------ |
||
1123 | pj | 23 | CVS : $Id: edfstar.h,v 1.2 2003-01-07 17:10:17 pj Exp $ |
1089 | pj | 24 | |
25 | File: $File$ |
||
1123 | pj | 26 | Revision: $Revision: 1.2 $ |
27 | Last update: $Date: 2003-01-07 17:10:17 $ |
||
1089 | pj | 28 | ------------ |
29 | |||
30 | Title: |
||
31 | EDFSTAR |
||
32 | |||
33 | Task Models Accepted: |
||
34 | HARD_TASK_MODEL - Hard Tasks (only Periodic) |
||
35 | wcet field and mit field must be != 0. They are used to set the wcet |
||
36 | and period of the tasks. |
||
37 | periodicity field can be only PERIODIC |
||
38 | drel field is ignored |
||
39 | |||
40 | Guest Models Accepted: |
||
41 | JOB_TASK_MODEL - a single guest task activation |
||
42 | Identified by an absolute deadline and a period. |
||
43 | period field is ignored |
||
44 | |||
45 | Description: |
||
46 | |||
47 | This module schedule his tasks following the classic EDF |
||
48 | scheme. This module is derived from the EDFACT Scheduling Module. |
||
49 | |||
50 | This module can not stay alone: when it have to schedule a task, it |
||
51 | simply inserts it into another master module using a |
||
52 | BUDGET_TASK_MODEL. |
||
53 | |||
54 | No Task guarantee is performed at all. |
||
55 | The tasks scheduled are only periodic. |
||
56 | All the task are put in a queue and the scheduling is based on the |
||
57 | deadline value. |
||
58 | If a task miss a deadline a counter is incremented. |
||
59 | If a task exausts the wcet a counter is incremented |
||
60 | No ZOMBIE support!!!!!! |
||
61 | |||
62 | Exceptions raised: |
||
63 | XUNVALID_GUEST XUNVALID_TASK |
||
64 | some primitives are not implemented: |
||
65 | task_sleep, task_delay, guest_endcycle, guest_sleep, guest_delay |
||
66 | |||
67 | XACTIVATION |
||
68 | If a task is actiated through task_activate or guest_activate more than |
||
69 | one time |
||
70 | |||
71 | Restrictions & special features: |
||
72 | - This level doesn't manage the main task. |
||
73 | - Functions to return and reset the nact, wcet and dline miss |
||
74 | counters are provided |
||
75 | |||
76 | **/ |
||
77 | |||
78 | /* |
||
79 | * Copyright (C) 2001 Paolo Gai |
||
80 | * |
||
81 | * This program is free software; you can redistribute it and/or modify |
||
82 | * it under the terms of the GNU General Public License as published by |
||
83 | * the Free Software Foundation; either version 2 of the License, or |
||
84 | * (at your option) any later version. |
||
85 | * |
||
86 | * This program is distributed in the hope that it will be useful, |
||
87 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
88 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
89 | * GNU General Public License for more details. |
||
90 | * |
||
91 | * You should have received a copy of the GNU General Public License |
||
92 | * along with this program; if not, write to the Free Software |
||
93 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
94 | * |
||
95 | */ |
||
96 | |||
97 | |||
98 | #ifndef __EDFSTAR_H__ |
||
99 | #define __EDFSTAR_H__ |
||
100 | |||
101 | #include <ll/ll.h> |
||
102 | #include <kernel/config.h> |
||
103 | #include <sys/types.h> |
||
104 | #include <kernel/types.h> |
||
105 | |||
106 | |||
107 | |||
108 | /* flags... */ |
||
109 | #define EDFSTAR_ENABLE_GUARANTEE 1 /* Task Guarantee enabled */ |
||
110 | #define EDFSTAR_ENABLE_ALL 1 |
||
111 | |||
112 | #define EDFSTAR_FAILED_GUARANTEE 8 /* used in the module, unsettabl |
||
113 | in EDF_register_level... */ |
||
114 | |||
115 | |||
116 | |||
117 | #define EDFSTAR_LEVELNAME "EDFSTAR base" |
||
118 | #define EDFSTAR_LEVEL_CODE 166 |
||
119 | #define EDFSTAR_LEVEL_VERSION 1 |
||
120 | |||
121 | |||
122 | /* Registration function: |
||
123 | int budget The budget used by this module (see CBSSTAR.h) |
||
124 | int master The master module used by EDFSTAR |
||
125 | */ |
||
126 | LEVEL EDFSTAR_register_level(int budget, int master); |
||
127 | |||
128 | /* returns respectively the number of dline, wcet or nact; -1 if error */ |
||
129 | int EDFSTAR_get_dline_miss(PID p); |
||
130 | int EDFSTAR_get_wcet_miss(PID p); |
||
131 | int EDFSTAR_get_nact(PID p); |
||
132 | |||
133 | /* resets respectively the number of dline, wcet miss; -1 if error */ |
||
134 | int EDFSTAR_reset_dline_miss(PID p); |
||
135 | int EDFSTAR_reset_wcet_miss(PID p); |
||
136 | |||
137 | #endif |
||
138 |