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Rev | Author | Line No. | Line |
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1004 | decky | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Martin Decky |
1004 | decky | 3 | * All rights reserved. |
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 | |||
1730 | decky | 29 | /** @addtogroup ppc32interrupt |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
1928 | decky | 35 | #include <ddi/irq.h> |
1004 | decky | 36 | #include <interrupt.h> |
37 | #include <arch/interrupt.h> |
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38 | #include <arch/types.h> |
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39 | #include <arch.h> |
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40 | #include <time/clock.h> |
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1265 | jermar | 41 | #include <ipc/sysipc.h> |
1480 | palkovsky | 42 | #include <arch/drivers/pic.h> |
1730 | decky | 43 | #include <arch/mm/tlb.h> |
1928 | decky | 44 | #include <print.h> |
1004 | decky | 45 | |
1267 | decky | 46 | |
1007 | decky | 47 | void start_decrementer(void) |
48 | { |
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49 | asm volatile ( |
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50 | "mtdec %0\n" |
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1268 | decky | 51 | : |
52 | : "r" (1000) |
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1007 | decky | 53 | ); |
54 | } |
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55 | |||
56 | |||
1609 | decky | 57 | /** Handler of external interrupts */ |
58 | static void exception_external(int n, istate_t *istate) |
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59 | { |
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60 | int inum; |
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1928 | decky | 61 | |
1609 | decky | 62 | while ((inum = pic_get_pending()) != -1) { |
1928 | decky | 63 | irq_t *irq = irq_dispatch_and_lock(inum); |
64 | if (irq) { |
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65 | /* |
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66 | * The IRQ handler was found. |
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67 | */ |
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68 | irq->handler(irq, irq->arg); |
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69 | spinlock_unlock(&irq->lock); |
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70 | } else { |
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71 | /* |
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72 | * Spurious interrupt. |
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73 | */ |
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74 | #ifdef CONFIG_DEBUG |
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75 | printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum); |
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76 | #endif |
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77 | } |
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1609 | decky | 78 | pic_ack_interrupt(inum); |
79 | } |
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80 | } |
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81 | |||
82 | |||
1004 | decky | 83 | static void exception_decrementer(int n, istate_t *istate) |
84 | { |
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85 | clock(); |
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1007 | decky | 86 | start_decrementer(); |
1004 | decky | 87 | } |
88 | |||
89 | |||
90 | /* Initialize basic tables for exception dispatching */ |
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91 | void interrupt_init(void) |
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92 | { |
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1609 | decky | 93 | exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill); |
94 | exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill); |
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95 | exc_register(VECTOR_EXTERNAL, "external", exception_external); |
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1004 | decky | 96 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
97 | } |
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1265 | jermar | 98 | |
1730 | decky | 99 | /** @} |
1702 | cejka | 100 | */ |