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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 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 | |||
| 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 | |||
| 1004 | decky | 35 | #include <interrupt.h> |
| 36 | #include <arch/interrupt.h> |
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| 37 | #include <arch/types.h> |
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| 38 | #include <arch.h> |
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| 39 | #include <time/clock.h> |
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| 1265 | jermar | 40 | #include <ipc/sysipc.h> |
| 1480 | palkovsky | 41 | #include <arch/drivers/pic.h> |
| 1730 | decky | 42 | #include <arch/mm/tlb.h> |
| 1004 | decky | 43 | |
| 1267 | decky | 44 | |
| 1007 | decky | 45 | void start_decrementer(void) |
| 46 | { |
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| 47 | asm volatile ( |
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| 48 | "mtdec %0\n" |
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| 1268 | decky | 49 | : |
| 50 | : "r" (1000) |
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| 1007 | decky | 51 | ); |
| 52 | } |
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| 53 | |||
| 54 | |||
| 1609 | decky | 55 | /** Handler of external interrupts */ |
| 56 | static void exception_external(int n, istate_t *istate) |
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| 57 | { |
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| 58 | int inum; |
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| 59 | |||
| 60 | while ((inum = pic_get_pending()) != -1) { |
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| 61 | exc_dispatch(inum + INT_OFFSET, istate); |
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| 62 | pic_ack_interrupt(inum); |
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| 63 | } |
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| 64 | } |
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| 65 | |||
| 66 | |||
| 1004 | decky | 67 | static void exception_decrementer(int n, istate_t *istate) |
| 68 | { |
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| 69 | clock(); |
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| 1007 | decky | 70 | start_decrementer(); |
| 1004 | decky | 71 | } |
| 72 | |||
| 73 | |||
| 74 | /* Initialize basic tables for exception dispatching */ |
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| 75 | void interrupt_init(void) |
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| 76 | { |
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| 1609 | decky | 77 | exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill); |
| 78 | exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill); |
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| 79 | exc_register(VECTOR_EXTERNAL, "external", exception_external); |
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| 1004 | decky | 80 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
| 81 | } |
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| 1265 | jermar | 82 | |
| 1730 | decky | 83 | /** @} |
| 1702 | cejka | 84 | */ |