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Rev | Author | Line No. | Line |
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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 | |||
1021 | mauro | 49 | //#define DEBUG_SHARK_GLUE |
1004 | mauro | 50 | |
1046 | tullio | 51 | /* |
52 | * Moved into intdrive.c |
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53 | */ |
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54 | extern PID intr_server; |
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55 | |||
1004 | mauro | 56 | void (*noint_handler)(int n); |
57 | |||
58 | #define MAX_INT_LIST 50 |
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59 | |||
60 | int int_list[MAX_INT_LIST]; |
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61 | |||
62 | int next_free_int = 0; |
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63 | int next_execute_int = 0; |
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64 | int n_intact = 0, n_lost = 0; |
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65 | |||
66 | /* FIFO add job */ |
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67 | int add_interrupt_job(int no) |
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68 | { |
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69 | int old_free_int = next_free_int; |
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70 | |||
1021 | mauro | 71 | #ifdef DEBUG_SHARK_GLUE |
72 | kern_printf("(add_interrupt_job: %d)", no); |
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73 | #endif |
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74 | |||
1004 | mauro | 75 | if (no<16) |
76 | irq_mask(no); |
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77 | |||
1033 | tullio | 78 | #ifdef DEBUG_SHARK_GLUE |
1004 | mauro | 79 | TRACER_LOGEVENT(FTrace_EVT_user_event_1, no, 0); |
1033 | tullio | 80 | #endif |
1004 | mauro | 81 | |
82 | int_list[next_free_int] = no; |
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83 | next_free_int++; |
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84 | |||
85 | if (next_free_int == MAX_INT_LIST) next_free_int = 0; |
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86 | if (next_free_int == next_execute_int) { |
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87 | next_free_int = old_free_int; |
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88 | n_lost++; |
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89 | //Raise an exception?!? |
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90 | return -1; |
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91 | } |
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92 | |||
93 | if (intr_server!=NIL) |
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94 | task_activate(intr_server); |
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95 | |||
96 | return 0; |
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97 | } |
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98 | |||
99 | /* FIFO get job */ |
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100 | int get_interrupt_job() |
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101 | { |
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102 | int res = -1; |
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103 | |||
104 | if (next_free_int != next_execute_int) { |
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105 | res = int_list[next_execute_int]; |
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106 | next_execute_int++; |
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107 | if (next_execute_int == MAX_INT_LIST) next_execute_int = 0; |
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108 | } |
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109 | |||
1033 | tullio | 110 | #ifdef DEBUG_SHARK_GLUE |
1004 | mauro | 111 | TRACER_LOGEVENT(FTrace_EVT_user_event_2, res, 0); |
1033 | tullio | 112 | #endif |
1004 | mauro | 113 | |
1021 | mauro | 114 | #ifdef DEBUG_SHARK_GLUE |
115 | kern_printf("(get_interrupt_job: %d)", res); |
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116 | #endif |
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117 | |||
1004 | mauro | 118 | return res; |
119 | } |
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120 | |||
121 | /* The Interrupt TASK is an aperiodic task designed for |
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122 | the INTDRIVE module. */ |
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123 | |||
1018 | mauro | 124 | void interrupt_job() |
1004 | mauro | 125 | { |
126 | void (*tmp_fast)(int n); |
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127 | int no; |
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128 | |||
1018 | mauro | 129 | n_intact++; |
130 | |||
131 | no = get_interrupt_job(); |
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132 | |||
1021 | mauro | 133 | #ifdef DEBUG_SHARK_GLUE |
134 | kern_printf("(interrupt_job: no %d)",no); |
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135 | #endif |
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136 | |||
1018 | mauro | 137 | if (no != -1 && no < 16) { |
138 | tmp_fast = handler_get_intdrive(no); |
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1021 | mauro | 139 | |
140 | /*extern void linux_intr(int irq); |
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141 | linux_intr(no);*/ |
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142 | |||
1018 | mauro | 143 | (tmp_fast)(no); |
144 | irq_unmask(no); |
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145 | } |
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146 | |||
147 | if (no != -1 && no >= 16) { |
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148 | (noint_handler)(no); |
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149 | } |
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150 | } |
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151 | |||
1077 | fabio | 152 | /* |
153 | * When an handler is removed pending activations have to be removed. |
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154 | * This may cause interrupt losses, drivers should be aware of that. |
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155 | */ |
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156 | void invalidate_pending_jobs(int no) |
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157 | { |
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158 | int i; |
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159 | |||
160 | i = next_execute_int; |
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161 | while (i != next_free_int) { |
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162 | if (int_list[i] == no) |
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163 | int_list[i] = -1; |
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164 | i = (i + 1) % MAX_INT_LIST; |
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165 | } |
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166 | } |
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167 | |||
1018 | mauro | 168 | TASK Interrupt_Server(void *arg) |
169 | { |
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1004 | mauro | 170 | while(1) { |
1018 | mauro | 171 | interrupt_job(); |
1004 | mauro | 172 | |
1018 | mauro | 173 | task_endcycle(); |
174 | } |
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1004 | mauro | 175 | |
1018 | mauro | 176 | } |
1004 | mauro | 177 | |
1018 | mauro | 178 | TASK Interrupt_Server_Prot(void *arg) |
179 | { |
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180 | while(1) { |
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181 | task_nopreempt(); |
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182 | interrupt_job(); |
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183 | task_preempt(); |
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1004 | mauro | 184 | |
185 | task_endcycle(); |
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186 | } |
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187 | |||
188 | } |
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189 | |||
190 | void set_noint_handler(void * new_handler) |
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191 | { |
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192 | noint_handler = new_handler; |
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1018 | mauro | 193 | } |