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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 | |||
| 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 | |||
| 1609 | decky | 48 | /** Handler of external interrupts */ |
| 49 | static void exception_external(int n, istate_t *istate) |
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| 50 | { |
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| 51 | int inum; |
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| 52 | |||
| 53 | while ((inum = pic_get_pending()) != -1) { |
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| 54 | exc_dispatch(inum + INT_OFFSET, istate); |
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| 55 | pic_ack_interrupt(inum); |
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| 56 | } |
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| 57 | } |
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| 58 | |||
| 59 | |||
| 1004 | decky | 60 | static void exception_decrementer(int n, istate_t *istate) |
| 61 | { |
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| 62 | clock(); |
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| 1007 | decky | 63 | start_decrementer(); |
| 1004 | decky | 64 | } |
| 65 | |||
| 66 | |||
| 67 | /* Initialize basic tables for exception dispatching */ |
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| 68 | void interrupt_init(void) |
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| 69 | { |
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| 1609 | decky | 70 | exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill); |
| 71 | exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill); |
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| 72 | exc_register(VECTOR_EXTERNAL, "external", exception_external); |
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| 1004 | decky | 73 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
| 74 | } |
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| 1265 | jermar | 75 | |
| 1268 | decky | 76 | |
| 1609 | decky | 77 | static void ipc_int(int n, istate_t *istate) |
| 1265 | jermar | 78 | { |
| 1609 | decky | 79 | ipc_irq_send_notif(n - INT_OFFSET); |
| 1265 | jermar | 80 | } |
| 1480 | palkovsky | 81 | |
| 1609 | decky | 82 | |
| 83 | /* Reregister irq to be IPC-ready */ |
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| 84 | void irq_ipc_bind_arch(__native irq) |
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| 1480 | palkovsky | 85 | { |
| 1609 | decky | 86 | int_register(irq, "ipc_int", ipc_int); |
| 1480 | palkovsky | 87 | } |