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| 2 | pj | 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 | |||
| 22 | /** |
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| 23 | ------------ |
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| 24 | CVS : $Id: var.h,v 1.1.1.1 2002-03-29 14:12:51 pj Exp $ |
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| 25 | |||
| 26 | File: $File$ |
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| 27 | Revision: $Revision: 1.1.1.1 $ |
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| 28 | Last update: $Date: 2002-03-29 14:12:51 $ |
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| 29 | ------------ |
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| 30 | |||
| 31 | Kernel global variables |
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| 32 | |||
| 33 | **/ |
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| 34 | |||
| 35 | /* |
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| 36 | * Copyright (C) 2000 Paolo Gai |
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| 37 | * |
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| 38 | * This program is free software; you can redistribute it and/or modify |
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| 39 | * it under the terms of the GNU General Public License as published by |
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| 40 | * the Free Software Foundation; either version 2 of the License, or |
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| 41 | * (at your option) any later version. |
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| 42 | * |
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| 43 | * This program is distributed in the hope that it will be useful, |
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| 44 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 45 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 46 | * GNU General Public License for more details. |
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| 47 | * |
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| 48 | * You should have received a copy of the GNU General Public License |
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| 49 | * along with this program; if not, write to the Free Software |
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| 50 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 51 | * |
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| 52 | */ |
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| 53 | |||
| 54 | #ifndef __KERNEL_VAR_H__ |
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| 55 | #define __KERNEL_VAR_H__ |
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| 56 | |||
| 57 | #include <ll/ll.h> |
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| 58 | #include <sys/types.h> |
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| 59 | #include <kernel/descr.h> |
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| 60 | |||
| 61 | /*---------------------------------------------------------------------*/ |
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| 62 | /* Kernel global variables: system queues & clock counters ... */ |
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| 63 | /*---------------------------------------------------------------------*/ |
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| 64 | |||
| 65 | extern proc_des proc_table[]; /*+ Process descriptor table +*/ |
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| 66 | extern level_des *level_table[]; /*+ Level descriptor table +*/ |
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| 67 | extern resource_des *resource_table[]; /*+ Resource descriptor table +*/ |
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| 68 | |||
| 69 | |||
| 70 | extern PID exec; /*+ task suggested by the scheduler +*/ |
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| 71 | extern PID exec_shadow; /*+ task really executed +*/ |
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| 72 | |||
| 73 | extern QUEUE freedesc; /*+ Free descriptor handled as a queue +*/ |
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| 74 | |||
| 75 | extern TIME sys_tick; /*+ System tick (in usec) +*/ |
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| 76 | extern struct timespec schedule_time; |
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| 77 | /*+ Time at witch the last scheduler() |
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| 78 | was called +*/ |
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| 79 | |||
| 80 | extern int cap_timer; /*+ the capacity event posted when the |
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| 81 | task starts +*/ |
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| 82 | extern struct timespec cap_lasttime; |
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| 83 | /*+ the time at whitch the capacity |
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| 84 | event is posted. Normally, it is |
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| 85 | equal to schedule_time +*/ |
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| 86 | |||
| 87 | extern DWORD sched_levels; /*+ Schedule levels active in the system +*/ |
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| 88 | extern DWORD res_levels; /*+ Resource levels active in the system +*/ |
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| 89 | |||
| 90 | extern int task_counter; /*+ Application task counter. It represent |
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| 91 | the number of Application tasks in the |
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| 92 | system. When all Application Tasks end, |
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| 93 | also the system ends. +*/ |
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| 94 | |||
| 95 | extern int system_counter; /*+ System task counter. It represent |
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| 96 | the number of System tasks in the |
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| 97 | system with the NO_KILL flag reset. |
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| 98 | When all Application Tasks end, |
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| 99 | the system waits for the end of the |
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| 100 | system tasks and then it ends. +*/ |
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| 101 | |||
| 102 | |||
| 103 | extern int mustexit; /*+ This variable is set by the system |
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| 104 | call sys_end() or sys_abort(). |
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| 105 | When a sys_end() or sys_abort is called |
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| 106 | into an event handler, |
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| 107 | we don't have to change context in the |
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| 108 | reschedule(). +*/ |
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| 109 | |||
| 110 | int calling_runlevel_func; /*+ this variable is set to 1 into |
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| 111 | call_runlevel_func (look at init.c) |
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| 112 | ad it is used because the task_activate |
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| 113 | (look at activate.c) must work in a |
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| 114 | different way when the system is in the |
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| 115 | global_context +*/ |
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| 116 | |||
| 117 | #endif /* __VAR_H__ */ |