Rev 961 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 961 | 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 | /** |
||
| 23 | ------------ |
||
| 24 | CVS : $Id: dummy.h,v 1.1 2005-02-25 10:55:09 pj Exp $ |
||
| 25 | |||
| 26 | File: $File$ |
||
| 27 | Revision: $Revision: 1.1 $ |
||
| 28 | Last update: $Date: 2005-02-25 10:55:09 $ |
||
| 29 | ------------ |
||
| 30 | |||
| 31 | This file contains the scheduling module RR (Round Robin) |
||
| 32 | |||
| 33 | Title: |
||
| 34 | DUMMY |
||
| 35 | |||
| 36 | Task Models Accepted: |
||
| 37 | DUMMY_TASK_MODEL - Dummy process (not usable) |
||
| 38 | |||
| 39 | Description: |
||
| 40 | This module creates the dummy task, witch is a special task that |
||
| 41 | do nothing. |
||
| 42 | |||
| 43 | Exceptions raised: |
||
| 44 | XUNVALID_GUEST |
||
| 45 | This level doesn't support guests. When a guest operation |
||
| 46 | is called, the exception is raised. |
||
| 47 | XUNVALID_DUMMY_OP |
||
| 48 | The dummy task can't be created, or activated, and so on... |
||
| 49 | |||
| 50 | Restrictions & special features: |
||
| 51 | - the task model DUMMY_TASK_MODEL can be used only at init time |
||
| 52 | to register the dummy process into the system. |
||
| 53 | - if __HLT_WORKS__ defined in this header file, the dummy task can |
||
| 54 | perform a hlt istruction to save power... |
||
| 55 | |||
| 56 | **/ |
||
| 57 | |||
| 58 | /* |
||
| 59 | * Copyright (C) 2000 Paolo Gai |
||
| 60 | * |
||
| 61 | * This program is free software; you can redistribute it and/or modify |
||
| 62 | * it under the terms of the GNU General Public License as published by |
||
| 63 | * the Free Software Foundation; either version 2 of the License, or |
||
| 64 | * (at your option) any later version. |
||
| 65 | * |
||
| 66 | * This program is distributed in the hope that it will be useful, |
||
| 67 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 68 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
| 69 | * GNU General Public License for more details. |
||
| 70 | * |
||
| 71 | * You should have received a copy of the GNU General Public License |
||
| 72 | * along with this program; if not, write to the Free Software |
||
| 73 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
| 74 | * |
||
| 75 | */ |
||
| 76 | |||
| 77 | |||
| 78 | #ifndef __DUMMY_H__ |
||
| 79 | #define __DUMMY_H__ |
||
| 80 | |||
| 81 | #include <kernel/types.h> |
||
| 1689 | fabio | 82 | #include <arch/sys/cdefs.h> |
| 961 | pj | 83 | |
| 84 | __BEGIN_DECLS |
||
| 85 | |||
| 86 | /*+ |
||
| 87 | On upper Intel CPUs it is possible to avoid CPU power consumption |
||
| 88 | when the system is idle issuing the hlt instruction. |
||
| 89 | This is often available on many 32 bit CPUs... |
||
| 90 | If it is, simply define the following!!! |
||
| 91 | +*/ |
||
| 92 | #define __HLT_WORKS__ |
||
| 93 | |||
| 94 | /*+ Registration function |
||
| 95 | |||
| 96 | returns the level number at which the module has been registered. |
||
| 97 | +*/ |
||
| 98 | LEVEL dummy_register_level(); |
||
| 99 | |||
| 100 | __END_DECLS |
||
| 101 | #endif |