Rev 1018 | Go to most recent revision | Details | Last modification | View Log | RSS feed
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| 1004 | mauro | 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 | * ... <......> |
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| 10 | * (see the web pages for full authors list) |
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| 11 | * |
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| 12 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 13 | * |
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| 14 | * http://www.sssup.it |
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| 15 | * http://retis.sssup.it |
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| 16 | * http://shark.sssup.it |
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| 17 | */ |
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| 18 | |||
| 19 | /* |
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| 20 | * Copyright (C) 2000,2002 Paolo Gai |
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| 21 | * |
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| 22 | * This program is free software; you can redistribute it and/or modify |
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| 23 | * it under the terms of the GNU General Public License as published by |
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| 24 | * the Free Software Foundation; either version 2 of the License, or |
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| 25 | * (at your option) any later version. |
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| 26 | * |
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| 27 | * This program is distributed in the hope that it will be useful, |
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| 28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 30 | * GNU General Public License for more details. |
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| 31 | * |
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| 32 | * You should have received a copy of the GNU General Public License |
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| 33 | * along with this program; if not, write to the Free Software |
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| 34 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 35 | * |
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| 36 | */ |
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| 37 | |||
| 38 | /* Interrupt Driver Module */ |
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| 39 | |||
| 40 | #include <kernel/int_sem.h> |
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| 41 | #include <stdlib.h> |
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| 42 | #include <kernel/func.h> |
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| 43 | #include <ll/sys/ll/event.h> |
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| 44 | #include <ll/i386/pic.h> |
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| 45 | #include <tracer.h> |
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| 46 | |||
| 47 | #include <intdrive/intdrive/inttask.h> |
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| 48 | |||
| 49 | //#define DEBUG_SHARK_GLUE |
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| 50 | |||
| 51 | PID intr_server = NIL; |
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| 52 | void (*noint_handler)(int n); |
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| 53 | |||
| 54 | #define MAX_INT_LIST 50 |
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| 55 | |||
| 56 | int int_list[MAX_INT_LIST]; |
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| 57 | |||
| 58 | int next_free_int = 0; |
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| 59 | int next_execute_int = 0; |
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| 60 | int n_intact = 0, n_lost = 0; |
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| 61 | |||
| 62 | /* FIFO add job */ |
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| 63 | int add_interrupt_job(int no) |
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| 64 | { |
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| 65 | int old_free_int = next_free_int; |
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| 66 | |||
| 67 | if (no<16) |
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| 68 | irq_mask(no); |
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| 69 | |||
| 70 | TRACER_LOGEVENT(FTrace_EVT_user_event_1, no, 0); |
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| 71 | |||
| 72 | int_list[next_free_int] = no; |
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| 73 | next_free_int++; |
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| 74 | |||
| 75 | if (next_free_int == MAX_INT_LIST) next_free_int = 0; |
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| 76 | if (next_free_int == next_execute_int) { |
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| 77 | next_free_int = old_free_int; |
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| 78 | n_lost++; |
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| 79 | //Raise an exception?!? |
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| 80 | return -1; |
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| 81 | } |
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| 82 | |||
| 83 | if (intr_server!=NIL) |
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| 84 | task_activate(intr_server); |
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| 85 | |||
| 86 | return 0; |
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| 87 | } |
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| 88 | |||
| 89 | /* FIFO get job */ |
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| 90 | int get_interrupt_job() |
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| 91 | { |
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| 92 | int res = -1; |
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| 93 | |||
| 94 | if (next_free_int != next_execute_int) { |
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| 95 | res = int_list[next_execute_int]; |
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| 96 | next_execute_int++; |
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| 97 | if (next_execute_int == MAX_INT_LIST) next_execute_int = 0; |
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| 98 | } |
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| 99 | |||
| 100 | TRACER_LOGEVENT(FTrace_EVT_user_event_2, res, 0); |
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| 101 | |||
| 102 | return res; |
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| 103 | } |
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| 104 | |||
| 105 | /* The Interrupt TASK is an aperiodic task designed for |
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| 106 | the INTDRIVE module. */ |
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| 107 | |||
| 108 | TASK Interrupt_Server(void *arg) |
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| 109 | { |
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| 110 | void (*tmp_fast)(int n); |
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| 111 | int no; |
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| 112 | |||
| 113 | while(1) { |
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| 114 | n_intact++; |
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| 115 | |||
| 116 | no = get_interrupt_job(); |
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| 117 | |||
| 118 | if (no != -1 && no < 16) { |
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| 119 | tmp_fast = handler_get_intdrive(no); |
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| 120 | (tmp_fast)(no); |
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| 121 | irq_unmask(no); |
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| 122 | } |
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| 123 | |||
| 124 | if (no != -1 && no >= 16) { |
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| 125 | (noint_handler)(no); |
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| 126 | } |
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| 127 | |||
| 128 | task_endcycle(); |
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| 129 | } |
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| 130 | |||
| 131 | } |
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| 132 | |||
| 133 | int intdrive_taskinit(int wcet) |
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| 134 | { |
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| 135 | HARD_TASK_MODEL ht; |
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| 136 | |||
| 137 | hard_task_default_model(ht); |
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| 138 | hard_task_def_wcet(ht, wcet); |
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| 139 | hard_task_def_interrupt(ht); |
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| 140 | hard_task_def_system(ht); |
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| 141 | hard_task_def_nokill(ht); |
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| 142 | |||
| 143 | intr_server = task_create("Interrupt Server",Interrupt_Server,&ht,NULL); |
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| 144 | if (intr_server == NIL) |
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| 145 | return -1; |
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| 146 | } |
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| 147 | |||
| 148 | void set_noint_handler(void * new_handler) |
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| 149 | { |
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| 150 | noint_handler = new_handler; |
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| 151 | } |