Rev 2307 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2292 | hudecek | 1 | /* |
| 2 | * Copyright (c) 2006 Jakub Jermar |
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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 | /** @addtogroup genericddi |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 35 | #ifndef KERN_IRQ_H_ |
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| 36 | #define KERN_IRQ_H_ |
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| 37 | |||
| 38 | typedef enum { |
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| 39 | CMD_MEM_READ_1 = 0, |
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| 40 | CMD_MEM_READ_2, |
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| 41 | CMD_MEM_READ_4, |
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| 42 | CMD_MEM_READ_8, |
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| 43 | CMD_MEM_WRITE_1, |
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| 44 | CMD_MEM_WRITE_2, |
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| 45 | CMD_MEM_WRITE_4, |
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| 46 | CMD_MEM_WRITE_8, |
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| 47 | CMD_PORT_READ_1, |
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| 48 | CMD_PORT_WRITE_1, |
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| 49 | CMD_IA64_GETCHAR, |
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| 50 | CMD_PPC32_GETCHAR, |
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| 51 | CMD_LAST |
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| 52 | } irq_cmd_type; |
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| 53 | |||
| 54 | typedef struct { |
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| 55 | irq_cmd_type cmd; |
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| 56 | void *addr; |
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| 57 | unsigned long long value; |
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| 58 | int dstarg; |
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| 59 | } irq_cmd_t; |
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| 60 | |||
| 61 | typedef struct { |
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| 62 | unsigned int cmdcount; |
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| 63 | irq_cmd_t *cmds; |
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| 64 | } irq_code_t; |
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| 65 | |||
| 66 | #ifdef KERNEL |
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| 67 | |||
| 68 | #include <arch/types.h> |
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| 69 | #include <adt/list.h> |
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| 70 | #include <synch/spinlock.h> |
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| 71 | #include <proc/task.h> |
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| 72 | |||
| 73 | typedef enum { |
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| 74 | IRQ_DECLINE, /**< Decline to service. */ |
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| 75 | IRQ_ACCEPT /**< Accept to service. */ |
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| 76 | } irq_ownership_t; |
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| 77 | |||
| 78 | typedef enum { |
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| 79 | IRQ_TRIGGER_LEVEL = 1, |
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| 80 | IRQ_TRIGGER_EDGE |
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| 81 | } irq_trigger_t; |
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| 82 | |||
| 83 | struct irq; |
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| 84 | typedef void (* irq_handler_t)(struct irq *irq, void *arg, ...); |
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| 85 | |||
| 86 | /** IPC notification config structure. |
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| 87 | * |
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| 88 | * Primarily, this structure is encapsulated in the irq_t structure. |
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| 89 | * It is protected by irq_t::lock. |
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| 90 | */ |
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| 91 | typedef struct { |
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| 92 | /** When false, notifications are not sent. */ |
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| 93 | bool notify; |
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| 94 | /** Answerbox for notifications. */ |
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| 95 | answerbox_t *answerbox; |
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| 96 | /** Method to be used for the notification. */ |
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| 97 | unative_t method; |
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| 98 | /** Top-half pseudocode. */ |
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| 99 | irq_code_t *code; |
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| 100 | /** Counter. */ |
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| 101 | count_t counter; |
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| 102 | /** |
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| 103 | * Link between IRQs that are notifying the same answerbox. The list is |
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| 104 | * protected by the answerbox irq_lock. |
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| 105 | */ |
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| 106 | link_t link; |
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| 107 | } ipc_notif_cfg_t; |
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| 108 | |||
| 109 | /** Structure representing one device IRQ. |
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| 110 | * |
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| 111 | * If one device has multiple interrupts, there will be multiple irq_t |
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| 112 | * instantions with the same devno. |
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| 113 | */ |
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| 114 | typedef struct irq { |
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| 115 | /** Hash table link. */ |
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| 116 | link_t link; |
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| 117 | |||
| 118 | /** Lock protecting everything in this structure |
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| 119 | * except the link member. When both the IRQ |
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| 120 | * hash table lock and this lock are to be acquired, |
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| 121 | * this lock must not be taken first. |
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| 122 | */ |
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| 123 | SPINLOCK_DECLARE(lock); |
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| 2307 | hudecek | 124 | |
| 125 | /** Send EOI before processing the interrupt. |
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| 126 | * This is essential for timer interrupt which |
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| 127 | * has to be acknowledged before doing preemption |
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| 128 | * to make sure another timer interrupt will |
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| 129 | * be eventually generated. |
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| 130 | */ |
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| 131 | bool preack; |
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| 2292 | hudecek | 132 | |
| 133 | /** Unique device number. -1 if not yet assigned. */ |
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| 134 | devno_t devno; |
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| 135 | |||
| 136 | /** Actual IRQ number. -1 if not yet assigned. */ |
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| 137 | inr_t inr; |
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| 2307 | hudecek | 138 | /** Trigger level of the IRQ. */ |
| 2292 | hudecek | 139 | irq_trigger_t trigger; |
| 140 | /** Claim ownership of the IRQ. */ |
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| 141 | irq_ownership_t (* claim)(void); |
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| 142 | /** Handler for this IRQ and device. */ |
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| 143 | irq_handler_t handler; |
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| 144 | /** Argument for the handler. */ |
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| 145 | void *arg; |
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| 146 | |||
| 147 | /** Notification configuration structure. */ |
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| 2456 | hudecek | 148 | ipc_notif_cfg_t* notif_cfg; |
| 2292 | hudecek | 149 | } irq_t; |
| 150 | |||
| 151 | extern void irq_init(count_t inrs, count_t chains); |
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| 152 | extern void irq_initialize(irq_t *irq); |
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| 153 | extern void irq_register(irq_t *irq); |
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| 154 | extern irq_t *irq_dispatch_and_lock(inr_t inr); |
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| 155 | extern irq_t *irq_find_and_lock(inr_t inr, devno_t devno); |
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| 156 | |||
| 157 | #endif |
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| 158 | |||
| 159 | #endif |
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| 160 | |||
| 161 | /** @} |
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| 162 | */ |