Subversion Repositories HelenOS

Rev

Rev 2263 | Rev 2341 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2162 stepan 1
/*
2245 stepan 2
 * Copyright (c) 2007 Petr Stepan
2162 stepan 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
 
29
/** @addtogroup arm32
30
 * @{
31
 */
32
/** @file
33
 */
34
 
2214 kebrt 35
#include <arch/asm.h>
36
#include <arch/regutils.h>
2245 stepan 37
#include <ddi/irq.h>
2274 kebrt 38
#include <arch/machine.h>
2214 kebrt 39
#include <interrupt.h>
2162 stepan 40
 
2245 stepan 41
#define IRQ_COUNT 8
2162 stepan 42
 
2214 kebrt 43
 
2162 stepan 44
/** Disable interrupts.
45
 *
46
 * @return Old interrupt priority level.
47
 */
48
ipl_t interrupts_disable(void)
49
{
2177 stepan 50
    ipl_t ipl = current_status_reg_read();
2162 stepan 51
 
2177 stepan 52
    current_status_reg_control_write(ipl & ~STATUS_REG_IE_ENABLED_BIT);
2162 stepan 53
 
54
    return ipl;
55
}
56
 
57
/** Enable interrupts.
58
 *
59
 * @return Old interrupt priority level.
60
 */
61
ipl_t interrupts_enable(void)
62
{
2177 stepan 63
    ipl_t ipl = current_status_reg_read();
2162 stepan 64
 
2177 stepan 65
    current_status_reg_control_write(ipl | STATUS_REG_IE_ENABLED_BIT);
2162 stepan 66
 
67
    return ipl;
68
}
69
 
70
/** Restore interrupt priority level.
71
 *
72
 * @param ipl Saved interrupt priority level.
73
 */
74
void interrupts_restore(ipl_t ipl)
75
{
2177 stepan 76
    current_status_reg_control_write(current_status_reg_read() |
77
            (ipl & STATUS_REG_IE_ENABLED_BIT));
2162 stepan 78
}
79
 
80
/** Read interrupt priority level.
81
 *
82
 * @return Current interrupt priority level.
83
 */
84
ipl_t interrupts_read(void)
85
{
2177 stepan 86
    return current_status_reg_read();
2162 stepan 87
}
88
 
2245 stepan 89
/** Initialize basic tables for exception dispatching
90
 * and starts the timer.
91
 */
92
void interrupt_init(void)
93
{
2214 kebrt 94
    irq_init(IRQ_COUNT, IRQ_COUNT);
2274 kebrt 95
    machine_timer_irq_start();
2214 kebrt 96
}
97
 
2245 stepan 98
 
2162 stepan 99
/** @}
100
 */