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1919 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
1919 | jermar | 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 | |||
1920 | jermar | 29 | /** @addtogroup genericddi |
1919 | jermar | 30 | * @{ |
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 | |||
2089 | decky | 38 | typedef enum { |
3947 | jermar | 39 | CMD_PIO_READ_8 = 1, |
40 | CMD_PIO_READ_16, |
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41 | CMD_PIO_READ_32, |
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42 | CMD_PIO_WRITE_8, |
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43 | CMD_PIO_WRITE_16, |
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44 | CMD_PIO_WRITE_32, |
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45 | CMD_BTEST, |
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46 | CMD_PREDICATE, |
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47 | CMD_ACCEPT, |
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48 | CMD_DECLINE, |
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2089 | decky | 49 | CMD_LAST |
50 | } irq_cmd_type; |
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51 | |||
52 | typedef struct { |
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53 | irq_cmd_type cmd; |
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54 | void *addr; |
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3947 | jermar | 55 | unsigned long long value; |
56 | unsigned int srcarg; |
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57 | unsigned int dstarg; |
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2089 | decky | 58 | } irq_cmd_t; |
59 | |||
60 | typedef struct { |
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61 | unsigned int cmdcount; |
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62 | irq_cmd_t *cmds; |
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63 | } irq_code_t; |
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64 | |||
65 | #ifdef KERNEL |
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66 | |||
1919 | jermar | 67 | #include <arch/types.h> |
68 | #include <adt/list.h> |
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3947 | jermar | 69 | #include <adt/hash_table.h> |
1921 | jermar | 70 | #include <synch/spinlock.h> |
2089 | decky | 71 | #include <proc/task.h> |
3947 | jermar | 72 | #include <ipc/ipc.h> |
1919 | jermar | 73 | |
74 | typedef enum { |
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75 | IRQ_DECLINE, /**< Decline to service. */ |
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76 | IRQ_ACCEPT /**< Accept to service. */ |
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77 | } irq_ownership_t; |
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78 | |||
79 | typedef enum { |
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80 | IRQ_TRIGGER_LEVEL = 1, |
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81 | IRQ_TRIGGER_EDGE |
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82 | } irq_trigger_t; |
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83 | |||
2089 | decky | 84 | struct irq; |
3906 | jermar | 85 | typedef void (* irq_handler_t)(struct irq *); |
1919 | jermar | 86 | |
3655 | jermar | 87 | /** Type for function used to clear the interrupt. */ |
3906 | jermar | 88 | typedef void (* cir_t)(void *, inr_t); |
3655 | jermar | 89 | |
2089 | decky | 90 | /** IPC notification config structure. |
91 | * |
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92 | * Primarily, this structure is encapsulated in the irq_t structure. |
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93 | * It is protected by irq_t::lock. |
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94 | */ |
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95 | typedef struct { |
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2106 | jermar | 96 | /** When false, notifications are not sent. */ |
97 | bool notify; |
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98 | /** Answerbox for notifications. */ |
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99 | answerbox_t *answerbox; |
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100 | /** Method to be used for the notification. */ |
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101 | unative_t method; |
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3947 | jermar | 102 | /** Arguments that will be sent if the IRQ is claimed. */ |
103 | unative_t scratch[IPC_CALL_LEN]; |
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2106 | jermar | 104 | /** Top-half pseudocode. */ |
105 | irq_code_t *code; |
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106 | /** Counter. */ |
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4490 | decky | 107 | size_t counter; |
2106 | jermar | 108 | /** |
109 | * Link between IRQs that are notifying the same answerbox. The list is |
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110 | * protected by the answerbox irq_lock. |
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111 | */ |
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112 | link_t link; |
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2089 | decky | 113 | } ipc_notif_cfg_t; |
114 | |||
1919 | jermar | 115 | /** Structure representing one device IRQ. |
116 | * |
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2106 | jermar | 117 | * If one device has multiple interrupts, there will be multiple irq_t |
118 | * instantions with the same devno. |
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1919 | jermar | 119 | */ |
2089 | decky | 120 | typedef struct irq { |
1919 | jermar | 121 | /** Hash table link. */ |
122 | link_t link; |
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123 | |||
1921 | jermar | 124 | /** Lock protecting everything in this structure |
125 | * except the link member. When both the IRQ |
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126 | * hash table lock and this lock are to be acquired, |
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127 | * this lock must not be taken first. |
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128 | */ |
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129 | SPINLOCK_DECLARE(lock); |
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2218 | decky | 130 | |
131 | /** Send EOI before processing the interrupt. |
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132 | * This is essential for timer interrupt which |
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133 | * has to be acknowledged before doing preemption |
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134 | * to make sure another timer interrupt will |
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135 | * be eventually generated. |
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136 | */ |
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137 | bool preack; |
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1921 | jermar | 138 | |
1919 | jermar | 139 | /** Unique device number. -1 if not yet assigned. */ |
140 | devno_t devno; |
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141 | |||
142 | /** Actual IRQ number. -1 if not yet assigned. */ |
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143 | inr_t inr; |
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2218 | decky | 144 | /** Trigger level of the IRQ. */ |
1919 | jermar | 145 | irq_trigger_t trigger; |
146 | /** Claim ownership of the IRQ. */ |
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3941 | jermar | 147 | irq_ownership_t (* claim)(struct irq *); |
1919 | jermar | 148 | /** Handler for this IRQ and device. */ |
149 | irq_handler_t handler; |
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3906 | jermar | 150 | /** Instance argument for the handler and the claim function. */ |
151 | void *instance; |
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1921 | jermar | 152 | |
3655 | jermar | 153 | /** Clear interrupt routine. */ |
154 | cir_t cir; |
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155 | /** First argument to the clear interrupt routine. */ |
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156 | void *cir_arg; |
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157 | |||
1923 | jermar | 158 | /** Notification configuration structure. */ |
159 | ipc_notif_cfg_t notif_cfg; |
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2089 | decky | 160 | } irq_t; |
1919 | jermar | 161 | |
3947 | jermar | 162 | SPINLOCK_EXTERN(irq_uspace_hash_table_lock); |
163 | extern hash_table_t irq_uspace_hash_table; |
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164 | |||
4490 | decky | 165 | extern void irq_init(size_t, size_t); |
3906 | jermar | 166 | extern void irq_initialize(irq_t *); |
167 | extern void irq_register(irq_t *); |
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168 | extern irq_t *irq_dispatch_and_lock(inr_t); |
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1919 | jermar | 169 | |
170 | #endif |
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171 | |||
2089 | decky | 172 | #endif |
173 | |||
1919 | jermar | 174 | /** @} |
175 | */ |