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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) { |
| 2218 | decky | 63 | bool ack = false; |
| 1928 | decky | 64 | irq_t *irq = irq_dispatch_and_lock(inum); |
| 65 | if (irq) { |
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| 66 | /* |
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| 67 | * The IRQ handler was found. |
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| 68 | */ |
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| 2218 | decky | 69 | |
| 70 | if (irq->preack) { |
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| 71 | /* Acknowledge the interrupt before processing */ |
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| 72 | pic_ack_interrupt(inum); |
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| 73 | ack = true; |
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| 74 | } |
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| 75 | |||
| 1928 | decky | 76 | irq->handler(irq, irq->arg); |
| 77 | spinlock_unlock(&irq->lock); |
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| 78 | } else { |
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| 79 | /* |
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| 80 | * Spurious interrupt. |
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| 81 | */ |
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| 82 | #ifdef CONFIG_DEBUG |
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| 3424 | svoboda | 83 | printf("cpu%u: spurious interrupt (inum=%d)\n", CPU->id, inum); |
| 1928 | decky | 84 | #endif |
| 85 | } |
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| 2218 | decky | 86 | |
| 87 | if (!ack) |
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| 88 | pic_ack_interrupt(inum); |
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| 1609 | decky | 89 | } |
| 90 | } |
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| 91 | |||
| 92 | |||
| 1004 | decky | 93 | static void exception_decrementer(int n, istate_t *istate) |
| 94 | { |
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| 95 | clock(); |
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| 1007 | decky | 96 | start_decrementer(); |
| 1004 | decky | 97 | } |
| 98 | |||
| 3431 | svoboda | 99 | #ifdef CONFIG_UDEBUG |
| 100 | |||
| 3116 | svoboda | 101 | static void exception_program_trap(istate_t *istate) |
| 102 | { |
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| 103 | if (istate_from_uspace(istate)) |
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| 104 | udebug_breakpoint_event(0); |
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| 105 | else |
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| 106 | panic("Program trap exception."); |
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| 107 | } |
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| 1004 | decky | 108 | |
| 3116 | svoboda | 109 | static void exception_program(int n, istate_t *istate) |
| 110 | { |
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| 111 | if ((istate->srr1 & SRR1_TRAP_EXC) != 0) { |
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| 112 | exception_program_trap(istate); |
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| 113 | } else { |
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| 114 | fault_if_from_uspace(istate, "Unhandled program exception."); |
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| 115 | panic("Unhandled program exception."); |
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| 116 | } |
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| 117 | } |
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| 118 | |||
| 3431 | svoboda | 119 | #endif |
| 120 | |||
| 1004 | decky | 121 | /* Initialize basic tables for exception dispatching */ |
| 122 | void interrupt_init(void) |
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| 123 | { |
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| 1609 | decky | 124 | exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill); |
| 125 | exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill); |
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| 126 | exc_register(VECTOR_EXTERNAL, "external", exception_external); |
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| 1004 | decky | 127 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
| 3431 | svoboda | 128 | #ifdef CONFIG_UDEBUG |
| 3116 | svoboda | 129 | exc_register(VECTOR_PROGRAM, "program", exception_program); |
| 3431 | svoboda | 130 | #endif |
| 1004 | decky | 131 | } |
| 1265 | jermar | 132 | |
| 1730 | decky | 133 | /** @} |
| 1702 | cejka | 134 | */ |