Subversion Repositories HelenOS

Rev

Rev 4343 | 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 {
4344 svoboda 39
    CMD_PIO_READ_8 = 1,
40
    CMD_PIO_READ_16,
41
    CMD_PIO_READ_32,
42
    CMD_PIO_WRITE_8,
43
    CMD_PIO_WRITE_16,
44
    CMD_PIO_WRITE_32,
45
    CMD_BTEST,
46
    CMD_PREDICATE,
47
    CMD_ACCEPT,
48
    CMD_DECLINE,
2089 decky 49
    CMD_LAST
50
} irq_cmd_type;
51
 
52
typedef struct {
53
    irq_cmd_type cmd;
54
    void *addr;
4344 svoboda 55
    unsigned long long value;
56
    unsigned int srcarg;
57
    unsigned int dstarg;
2089 decky 58
} irq_cmd_t;
59
 
60
typedef struct {
61
    unsigned int cmdcount;
62
    irq_cmd_t *cmds;
63
} irq_code_t;
64
 
65
#ifdef KERNEL
66
 
1919 jermar 67
#include <arch/types.h>
68
#include <adt/list.h>
4344 svoboda 69
#include <adt/hash_table.h>
1921 jermar 70
#include <synch/spinlock.h>
2089 decky 71
#include <proc/task.h>
4344 svoboda 72
#include <ipc/ipc.h>
1919 jermar 73
 
74
typedef enum {
75
    IRQ_DECLINE,        /**< Decline to service. */
76
    IRQ_ACCEPT      /**< Accept to service. */
77
} irq_ownership_t;
78
 
79
typedef enum {
80
    IRQ_TRIGGER_LEVEL = 1,
81
    IRQ_TRIGGER_EDGE
82
} irq_trigger_t;
83
 
2089 decky 84
struct irq;
4343 svoboda 85
typedef void (* irq_handler_t)(struct irq *);
1919 jermar 86
 
3674 svoboda 87
/** Type for function used to clear the interrupt. */
4343 svoboda 88
typedef void (* cir_t)(void *, inr_t);
3674 svoboda 89
 
2089 decky 90
/** IPC notification config structure.
91
 *
92
 * Primarily, this structure is encapsulated in the irq_t structure.
93
 * It is protected by irq_t::lock.
94
 */
95
typedef struct {
2106 jermar 96
    /** When false, notifications are not sent. */
97
    bool notify;
98
    /** Answerbox for notifications. */
99
    answerbox_t *answerbox;
100
    /** Method to be used for the notification. */
101
    unative_t method;
4344 svoboda 102
    /** Arguments that will be sent if the IRQ is claimed. */
103
    unative_t scratch[IPC_CALL_LEN];
2106 jermar 104
    /** Top-half pseudocode. */
105
    irq_code_t *code;
106
    /** Counter. */
107
    count_t counter;
108
    /**
109
     * Link between IRQs that are notifying the same answerbox. The list is
110
     * protected by the answerbox irq_lock.
111
     */
112
    link_t link;
2089 decky 113
} ipc_notif_cfg_t;
114
 
1919 jermar 115
/** Structure representing one device IRQ.
116
 *
2106 jermar 117
 * If one device has multiple interrupts, there will be multiple irq_t
118
 * instantions with the same devno.
1919 jermar 119
 */
2089 decky 120
typedef struct irq {
1919 jermar 121
    /** Hash table link. */
122
    link_t link;
123
 
1921 jermar 124
    /** Lock protecting everything in this structure
125
     *  except the link member. When both the IRQ
126
     *  hash table lock and this lock are to be acquired,
127
     *  this lock must not be taken first.
128
     */
129
    SPINLOCK_DECLARE(lock);
2218 decky 130
 
131
    /** Send EOI before processing the interrupt.
132
     *  This is essential for timer interrupt which
133
     *  has to be acknowledged before doing preemption
134
     *  to make sure another timer interrupt will
135
     *  be eventually generated.
136
     */
137
    bool preack;
1921 jermar 138
 
1919 jermar 139
    /** Unique device number. -1 if not yet assigned. */
140
    devno_t devno;
141
 
142
    /** Actual IRQ number. -1 if not yet assigned. */
143
    inr_t inr;
2218 decky 144
    /** Trigger level of the IRQ. */
1919 jermar 145
    irq_trigger_t trigger;
146
    /** Claim ownership of the IRQ. */
4344 svoboda 147
    irq_ownership_t (* claim)(struct irq *);
1919 jermar 148
    /** Handler for this IRQ and device. */
149
    irq_handler_t handler;
4343 svoboda 150
    /** Instance argument for the handler and the claim function. */
151
    void *instance;
1921 jermar 152
 
3674 svoboda 153
    /** Clear interrupt routine. */
154
    cir_t cir;
155
    /** First argument to the clear interrupt routine. */
156
    void *cir_arg;
157
 
1923 jermar 158
    /** Notification configuration structure. */
159
    ipc_notif_cfg_t notif_cfg;
2089 decky 160
} irq_t;
1919 jermar 161
 
4344 svoboda 162
SPINLOCK_EXTERN(irq_uspace_hash_table_lock);
163
extern hash_table_t irq_uspace_hash_table;
164
 
4343 svoboda 165
extern void irq_init(count_t, count_t);
166
extern void irq_initialize(irq_t *);
167
extern void irq_register(irq_t *);
168
extern irq_t *irq_dispatch_and_lock(inr_t);
1919 jermar 169
 
170
#endif
171
 
2089 decky 172
#endif
173
 
1919 jermar 174
/** @}
175
 */