blob: 2bfcadc98f4eb1c941869eff26b00918825f14b8 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*
* PXA255 Interrupt handler by Yang Xi <hiyangxi@gmail.com>
* Copyright (c) 2004 by Jay Monkman <jtm@lopingdog.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp.h>
#include <irq.h>
#include <rtems/score/thread.h>
#include <rtems/score/apiext.h>
#include <pxa255.h>
/*
* This function check that the value given for the irq line
* is valid.
*/
static int isValidInterrupt(int irq)
{
if ( (irq < 0) || (irq >= PRIMARY_IRQS)) {
return 0;
}
return 1;
}
/*
* Installs the interrupt handler.
*/
int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq)
{
rtems_interrupt_level level;
if (!isValidInterrupt(irq->name)) {
return 0;
}
/*
* Check if default handler is actually connected. If not, issue
* an error. Note: irq->name is a number corresponding to the
* interrupt number . We
* convert it to a long word offset to get source's vector register
*/
if (IRQ_table[irq->name] != dummy_handler) {
return 0;
}
_CPU_ISR_Disable(level);
/*
* store the new handler
*/
IRQ_table[irq->name] = irq->hdl;
/*
* unmask interrupt
*/
XSCALE_INT_ICMR = XSCALE_INT_ICMR | 1 << irq->name;
/*
* Enable interrupt on device
*/
if(irq->on) {
irq->on(irq);
}
_CPU_ISR_Enable(level);
return 1;
}
/*
* Remove and interrupt handler
*/
int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq)
{
rtems_interrupt_level level;
if (!isValidInterrupt(irq->name)) {
return 0;
}
/*
* Check if the handler is actually connected. If not, issue an error.
*/
if (IRQ_table[irq->name] != irq->hdl) {
return 0;
}
_CPU_ISR_Disable(level);
/*
* mask interrupt
*/
XSCALE_INT_ICMR = XSCALE_INT_ICMR & (~(1 << irq->name));
/*
* Disable interrupt on device
*/
if(irq->off) {
irq->off(irq);
}
/*
* restore the default irq value
*/
IRQ_table[irq->name] = dummy_handler;
_CPU_ISR_Enable(level);
return 1;
}
|
