Subversion Repositories HelenOS

Rev

Rev 3655 | Rev 3941 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1919 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2006 Jakub Jermar
1919 jermar 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
 
1920 jermar 29
/** @addtogroup genericddi
1919 jermar 30
 * @{
31
 */
32
/** @file
33
 */
34
 
35
#ifndef KERN_IRQ_H_
36
#define KERN_IRQ_H_
37
 
2089 decky 38
typedef enum {
39
    CMD_MEM_READ_1 = 0,
40
    CMD_MEM_READ_2,
41
    CMD_MEM_READ_4,
42
    CMD_MEM_READ_8,
43
    CMD_MEM_WRITE_1,
44
    CMD_MEM_WRITE_2,
45
    CMD_MEM_WRITE_4,
46
    CMD_MEM_WRITE_8,
47
    CMD_PORT_READ_1,
48
    CMD_PORT_WRITE_1,
49
    CMD_LAST
50
} irq_cmd_type;
51
 
52
typedef struct {
53
    irq_cmd_type cmd;
54
    void *addr;
55
    unsigned long long value;
56
    int dstarg;
57
} irq_cmd_t;
58
 
59
typedef struct {
60
    unsigned int cmdcount;
61
    irq_cmd_t *cmds;
62
} irq_code_t;
63
 
64
#ifdef KERNEL
65
 
1919 jermar 66
#include <arch/types.h>
67
#include <adt/list.h>
1921 jermar 68
#include <synch/spinlock.h>
2089 decky 69
#include <proc/task.h>
1919 jermar 70
 
71
typedef enum {
72
    IRQ_DECLINE,        /**< Decline to service. */
73
    IRQ_ACCEPT      /**< Accept to service. */
74
} irq_ownership_t;
75
 
76
typedef enum {
77
    IRQ_TRIGGER_LEVEL = 1,
78
    IRQ_TRIGGER_EDGE
79
} irq_trigger_t;
80
 
2089 decky 81
struct irq;
82
typedef void (* irq_handler_t)(struct irq *irq, void *arg, ...);
1919 jermar 83
 
3655 jermar 84
/** Type for function used to clear the interrupt. */
85
typedef void (* cir_t)(void *arg, inr_t inr);
86
 
2089 decky 87
/** IPC notification config structure.
88
 *
89
 * Primarily, this structure is encapsulated in the irq_t structure.
90
 * It is protected by irq_t::lock.
91
 */
92
typedef struct {
2106 jermar 93
    /** When false, notifications are not sent. */
94
    bool notify;
95
    /** Answerbox for notifications. */
96
    answerbox_t *answerbox;
97
    /** Method to be used for the notification. */
98
    unative_t method;
99
    /** Top-half pseudocode. */
100
    irq_code_t *code;
101
    /** Counter. */
102
    count_t counter;
103
    /**
104
     * Link between IRQs that are notifying the same answerbox. The list is
105
     * protected by the answerbox irq_lock.
106
     */
107
    link_t link;
2089 decky 108
} ipc_notif_cfg_t;
109
 
1919 jermar 110
/** Structure representing one device IRQ.
111
 *
2106 jermar 112
 * If one device has multiple interrupts, there will be multiple irq_t
113
 * instantions with the same devno.
1919 jermar 114
 */
2089 decky 115
typedef struct irq {
1919 jermar 116
    /** Hash table link. */
117
    link_t link;
118
 
1921 jermar 119
    /** Lock protecting everything in this structure
120
     *  except the link member. When both the IRQ
121
     *  hash table lock and this lock are to be acquired,
122
     *  this lock must not be taken first.
123
     */
124
    SPINLOCK_DECLARE(lock);
2218 decky 125
 
126
    /** Send EOI before processing the interrupt.
127
     *  This is essential for timer interrupt which
128
     *  has to be acknowledged before doing preemption
129
     *  to make sure another timer interrupt will
130
     *  be eventually generated.
131
     */
132
    bool preack;
1921 jermar 133
 
1919 jermar 134
    /** Unique device number. -1 if not yet assigned. */
135
    devno_t devno;
136
 
137
    /** Actual IRQ number. -1 if not yet assigned. */
138
    inr_t inr;
2218 decky 139
    /** Trigger level of the IRQ. */
1919 jermar 140
    irq_trigger_t trigger;
141
    /** Claim ownership of the IRQ. */
142
    irq_ownership_t (* claim)(void);
143
    /** Handler for this IRQ and device. */
144
    irq_handler_t handler;
145
    /** Argument for the handler. */
146
    void *arg;
1921 jermar 147
 
3655 jermar 148
    /** Clear interrupt routine. */
149
    cir_t cir;
150
    /** First argument to the clear interrupt routine. */
151
    void *cir_arg;
152
 
1923 jermar 153
    /** Notification configuration structure. */
154
    ipc_notif_cfg_t notif_cfg;
2089 decky 155
} irq_t;
1919 jermar 156
 
157
extern void irq_init(count_t inrs, count_t chains);
158
extern void irq_initialize(irq_t *irq);
159
extern void irq_register(irq_t *irq);
1922 jermar 160
extern irq_t *irq_dispatch_and_lock(inr_t inr);
161
extern irq_t *irq_find_and_lock(inr_t inr, devno_t devno);
1919 jermar 162
 
163
#endif
164
 
2089 decky 165
#endif
166
 
1919 jermar 167
/** @}
168
 */