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1004 | decky | 1 | /* |
2 | * Copyright (C) 2006 Martin Decky |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include <interrupt.h> |
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30 | #include <arch/interrupt.h> |
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31 | #include <arch/types.h> |
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32 | #include <arch.h> |
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33 | #include <time/clock.h> |
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1265 | jermar | 34 | #include <ipc/sysipc.h> |
1480 | palkovsky | 35 | #include <arch/drivers/pic.h> |
1004 | decky | 36 | |
1267 | decky | 37 | |
1007 | decky | 38 | void start_decrementer(void) |
39 | { |
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40 | asm volatile ( |
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41 | "mtdec %0\n" |
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1268 | decky | 42 | : |
43 | : "r" (1000) |
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1007 | decky | 44 | ); |
45 | } |
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46 | |||
47 | |||
1004 | decky | 48 | static void exception_decrementer(int n, istate_t *istate) |
49 | { |
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50 | clock(); |
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1007 | decky | 51 | start_decrementer(); |
1004 | decky | 52 | } |
53 | |||
54 | |||
55 | /* Initialize basic tables for exception dispatching */ |
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56 | void interrupt_init(void) |
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57 | { |
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58 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
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59 | } |
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1265 | jermar | 60 | |
1268 | decky | 61 | |
1265 | jermar | 62 | /* Reregister irq to be IPC-ready */ |
63 | void irq_ipc_bind_arch(__native irq) |
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64 | { |
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65 | panic("not implemented\n"); |
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66 | /* TODO */ |
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67 | } |
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1480 | palkovsky | 68 | |
69 | /** Handler of externul interrupts */ |
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70 | void extint_handler(int n, istate_t *istate) |
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71 | { |
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72 | int inum; |
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73 | |||
74 | while ((inum = pic_get_pending()) != -1) { |
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75 | exc_dispatch(inum+INT_OFFSET, istate); |
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76 | pic_ack_interrupt(inum); |
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77 | } |
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78 | } |