Rev 2131 | Rev 2292 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2265 | hudecek | 1 | /* |
| 2 | * Copyright (c) 2006 Martin Decky |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | /** @addtogroup ppc32interrupt |
||
| 30 | * @{ |
||
| 31 | */ |
||
| 32 | /** @file |
||
| 33 | */ |
||
| 34 | |||
| 35 | #include <ddi/irq.h> |
||
| 36 | #include <interrupt.h> |
||
| 37 | #include <arch/interrupt.h> |
||
| 38 | #include <arch/types.h> |
||
| 39 | #include <arch.h> |
||
| 40 | #include <time/clock.h> |
||
| 41 | #include <ipc/sysipc.h> |
||
| 42 | #include <arch/drivers/pic.h> |
||
| 43 | #include <arch/mm/tlb.h> |
||
| 44 | #include <print.h> |
||
| 45 | |||
| 46 | |||
| 47 | void start_decrementer(void) |
||
| 48 | { |
||
| 49 | asm volatile ( |
||
| 50 | "mtdec %0\n" |
||
| 51 | : |
||
| 52 | : "r" (1000) |
||
| 53 | ); |
||
| 54 | } |
||
| 55 | |||
| 56 | |||
| 57 | /** Handler of external interrupts */ |
||
| 58 | static void exception_external(int n, istate_t *istate) |
||
| 59 | { |
||
| 60 | int inum; |
||
| 61 | |||
| 62 | while ((inum = pic_get_pending()) != -1) { |
||
| 63 | bool ack = false; |
||
| 64 | irq_t *irq = irq_dispatch_and_lock(inum); |
||
| 65 | if (irq) { |
||
| 66 | /* |
||
| 67 | * The IRQ handler was found. |
||
| 68 | */ |
||
| 69 | |||
| 70 | if (irq->preack) { |
||
| 71 | /* Acknowledge the interrupt before processing */ |
||
| 72 | pic_ack_interrupt(inum); |
||
| 73 | ack = true; |
||
| 74 | } |
||
| 75 | |||
| 76 | irq->handler(irq, irq->arg); |
||
| 77 | spinlock_unlock(&irq->lock); |
||
| 78 | } else { |
||
| 79 | /* |
||
| 80 | * Spurious interrupt. |
||
| 81 | */ |
||
| 82 | #ifdef CONFIG_DEBUG |
||
| 83 | printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum); |
||
| 84 | #endif |
||
| 85 | } |
||
| 86 | |||
| 87 | if (!ack) |
||
| 88 | pic_ack_interrupt(inum); |
||
| 89 | } |
||
| 90 | } |
||
| 91 | |||
| 92 | |||
| 93 | static void exception_decrementer(int n, istate_t *istate) |
||
| 94 | { |
||
| 95 | clock(); |
||
| 96 | start_decrementer(); |
||
| 97 | } |
||
| 98 | |||
| 99 | |||
| 100 | /* Initialize basic tables for exception dispatching */ |
||
| 101 | void interrupt_init(void) |
||
| 102 | { |
||
| 103 | exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill); |
||
| 104 | exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill); |
||
| 105 | exc_register(VECTOR_EXTERNAL, "external", exception_external); |
||
| 106 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
||
| 107 | } |
||
| 108 | |||
| 109 | /** @} |
||
| 110 | */ |