Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | 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: var.h,v 1.1.1.1 2002-03-29 14:12:51 pj Exp $ |
||
| 25 | |||
| 26 | File: $File$ |
||
| 27 | Revision: $Revision: 1.1.1.1 $ |
||
| 28 | Last update: $Date: 2002-03-29 14:12:51 $ |
||
| 29 | ------------ |
||
| 30 | |||
| 31 | Kernel global variables |
||
| 32 | |||
| 33 | **/ |
||
| 34 | |||
| 35 | /* |
||
| 36 | * Copyright (C) 2000 Paolo Gai |
||
| 37 | * |
||
| 38 | * This program is free software; you can redistribute it and/or modify |
||
| 39 | * it under the terms of the GNU General Public License as published by |
||
| 40 | * the Free Software Foundation; either version 2 of the License, or |
||
| 41 | * (at your option) any later version. |
||
| 42 | * |
||
| 43 | * This program is distributed in the hope that it will be useful, |
||
| 44 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 45 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
| 46 | * GNU General Public License for more details. |
||
| 47 | * |
||
| 48 | * You should have received a copy of the GNU General Public License |
||
| 49 | * along with this program; if not, write to the Free Software |
||
| 50 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||
| 51 | * |
||
| 52 | */ |
||
| 53 | |||
| 54 | #ifndef __KERNEL_VAR_H__ |
||
| 55 | #define __KERNEL_VAR_H__ |
||
| 56 | |||
| 57 | #include <ll/ll.h> |
||
| 58 | #include <sys/types.h> |
||
| 59 | #include <kernel/descr.h> |
||
| 60 | |||
| 61 | /*---------------------------------------------------------------------*/ |
||
| 62 | /* Kernel global variables: system queues & clock counters ... */ |
||
| 63 | /*---------------------------------------------------------------------*/ |
||
| 64 | |||
| 65 | extern proc_des proc_table[]; /*+ Process descriptor table +*/ |
||
| 66 | extern level_des *level_table[]; /*+ Level descriptor table +*/ |
||
| 67 | extern resource_des *resource_table[]; /*+ Resource descriptor table +*/ |
||
| 68 | |||
| 69 | |||
| 70 | extern PID exec; /*+ task suggested by the scheduler +*/ |
||
| 71 | extern PID exec_shadow; /*+ task really executed +*/ |
||
| 72 | |||
| 73 | extern QUEUE freedesc; /*+ Free descriptor handled as a queue +*/ |
||
| 74 | |||
| 75 | extern TIME sys_tick; /*+ System tick (in usec) +*/ |
||
| 76 | extern struct timespec schedule_time; |
||
| 77 | /*+ Time at witch the last scheduler() |
||
| 78 | was called +*/ |
||
| 79 | |||
| 80 | extern int cap_timer; /*+ the capacity event posted when the |
||
| 81 | task starts +*/ |
||
| 82 | extern struct timespec cap_lasttime; |
||
| 83 | /*+ the time at whitch the capacity |
||
| 84 | event is posted. Normally, it is |
||
| 85 | equal to schedule_time +*/ |
||
| 86 | |||
| 87 | extern DWORD sched_levels; /*+ Schedule levels active in the system +*/ |
||
| 88 | extern DWORD res_levels; /*+ Resource levels active in the system +*/ |
||
| 89 | |||
| 90 | extern int task_counter; /*+ Application task counter. It represent |
||
| 91 | the number of Application tasks in the |
||
| 92 | system. When all Application Tasks end, |
||
| 93 | also the system ends. +*/ |
||
| 94 | |||
| 95 | extern int system_counter; /*+ System task counter. It represent |
||
| 96 | the number of System tasks in the |
||
| 97 | system with the NO_KILL flag reset. |
||
| 98 | When all Application Tasks end, |
||
| 99 | the system waits for the end of the |
||
| 100 | system tasks and then it ends. +*/ |
||
| 101 | |||
| 102 | |||
| 103 | extern int mustexit; /*+ This variable is set by the system |
||
| 104 | call sys_end() or sys_abort(). |
||
| 105 | When a sys_end() or sys_abort is called |
||
| 106 | into an event handler, |
||
| 107 | we don't have to change context in the |
||
| 108 | reschedule(). +*/ |
||
| 109 | |||
| 110 | int calling_runlevel_func; /*+ this variable is set to 1 into |
||
| 111 | call_runlevel_func (look at init.c) |
||
| 112 | ad it is used because the task_activate |
||
| 113 | (look at activate.c) must work in a |
||
| 114 | different way when the system is in the |
||
| 115 | global_context +*/ |
||
| 116 | |||
| 117 | #endif /* __VAR_H__ */ |