Subversion Repositories HelenOS

Rev

Rev 2071 | Rev 3071 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1004 decky 1
/*
2071 jermar 2
 * Copyright (c) 2006 Martin Decky
1004 decky 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
 
1730 decky 29
/** @addtogroup ppc32interrupt
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1928 decky 35
#include <ddi/irq.h>
1004 decky 36
#include <interrupt.h>
37
#include <arch/interrupt.h>
38
#include <arch/types.h>
39
#include <arch.h>
40
#include <time/clock.h>
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
{
49
    asm volatile (
50
        "mtdec %0\n"
1268 decky 51
        :
52
        : "r" (1000)
1007 decky 53
    );
54
}
55
 
56
 
1609 decky 57
/** Handler of external interrupts */
58
static void exception_external(int n, istate_t *istate)
59
{
60
    int inum;
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) {
66
            /*
67
             * The IRQ handler was found.
68
             */
2218 decky 69
 
70
            if (irq->preack) {
71
                /* Acknowledge the interrupt before processing */
72
                pic_ack_interrupt(inum);
73
                ack = true;
74
            }
75
 
1928 decky 76
            irq->handler(irq, irq->arg);
77
            spinlock_unlock(&irq->lock);
78
        } else {
79
            /*
80
             * Spurious interrupt.
81
             */
82
#ifdef CONFIG_DEBUG
83
            printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
84
#endif
85
        }
2218 decky 86
 
87
        if (!ack)
88
            pic_ack_interrupt(inum);
1609 decky 89
    }
90
}
91
 
92
 
1004 decky 93
static void exception_decrementer(int n, istate_t *istate)
94
{
95
    clock();
1007 decky 96
    start_decrementer();
1004 decky 97
}
98
 
99
 
100
/* Initialize basic tables for exception dispatching */
101
void interrupt_init(void)
102
{
1609 decky 103
    exc_register(VECTOR_DATA_STORAGE, "data_storage", pht_refill);
104
    exc_register(VECTOR_INSTRUCTION_STORAGE, "instruction_storage", pht_refill);
105
    exc_register(VECTOR_EXTERNAL, "external", exception_external);
1004 decky 106
    exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer);
107
}
1265 jermar 108
 
1730 decky 109
/** @}
1702 cejka 110
 */