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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/**
* @file
*
* @ingroup mpc55xx
*
* @brief Source file for MPC55XX interrupt support.
*/
/*
* Copyright (c) 2008
* Embedded Brains GmbH
* Obere Lagerstr. 30
* D-82178 Puchheim
* Germany
* rtems@embedded-brains.de
*
* 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.
*/
#include <mpc55xx/regs.h>
#include <libcpu/raw_exception.h>
#include <bsp/irq.h>
#include <bsp/irq-generic.h>
#include <bsp/ppc_exc_bspsupp.h>
#define RTEMS_STATUS_CHECKS_USE_PRINTK
#include <rtems/status-checks.h>
/**
* @brief Returns the priority @a p of IRQ @a i from the INTC.
*/
rtems_status_code mpc55xx_intc_get_priority( int i, int *p)
{
if (MPC55XX_IRQ_IS_VALID( i)) {
*p = INTC.PSR [i].B.PRI;
return RTEMS_SUCCESSFUL;
} else {
*p = MPC55XX_INTC_INVALID_PRIORITY;
return RTEMS_INVALID_NUMBER;
}
}
/**
* @brief Sets the priority of IRQ @a i to @a p at the INTC.
*/
rtems_status_code mpc55xx_intc_set_priority( int i, int p)
{
if (MPC55XX_IRQ_IS_VALID( i) && MPC55XX_INTC_IS_VALID_PRIORITY( p)) {
INTC.PSR [i].B.PRI = p;
if (INTC.PSR [i].B.PRI == p) {
return RTEMS_SUCCESSFUL;
} else {
return RTEMS_IO_ERROR;
}
} else {
return RTEMS_INVALID_NUMBER;
}
}
/**
* @brief Raises the software IRQ with number @a i.
*/
rtems_status_code mpc55xx_intc_raise_software_irq( int i)
{
if (MPC55XX_IRQ_IS_SOFTWARE( i)) {
INTC.SSCIR [i].B.SET = 1;
return RTEMS_SUCCESSFUL;
} else {
return RTEMS_INVALID_NUMBER;
}
}
/**
* @brief Clears the software IRQ with number @a i.
*/
rtems_status_code mpc55xx_intc_clear_software_irq( int i)
{
if (MPC55XX_IRQ_IS_SOFTWARE( i)) {
INTC.SSCIR [i].B.CLR = 1;
return RTEMS_SUCCESSFUL;
} else {
return RTEMS_INVALID_NUMBER;
}
}
/**
* @brief Installs interrupt handler and sets priority.
*/
rtems_status_code mpc55xx_interrupt_handler_install(
rtems_vector_number vector,
int priority,
const char *info,
rtems_option options,
rtems_interrupt_handler handler,
void *arg
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
if (MPC55XX_IRQ_IS_VALID( vector) && MPC55XX_INTC_IS_VALID_PRIORITY( priority)) {
sc = rtems_interrupt_handler_install( vector, info, options, handler, arg);
CHECK_SC( sc, "Install interrupt handler");
return mpc55xx_intc_set_priority( vector, priority);
} else {
return RTEMS_INVALID_NUMBER;
}
}
/**
* @brief External exception handler.
*/
static int mpc55xx_external_exception_handler( BSP_Exception_frame *frame, unsigned exception_number)
{
/* Acknowlege interrupt request */
rtems_vector_number vector_number = INTC.IACKR.B.INTVEC;
/* Save current interrupt level */
uint32_t level = _ISR_Get_level();
/* Enable all interrupts */
_ISR_Set_level( 0);
/* Dispatch interrupt handlers */
bsp_interrupt_handler_dispatch( vector_number);
/* Restore interrupt level */
_ISR_Set_level( level);
/* End of interrupt */
INTC.EOIR.R = 1;
return 0;
}
rtems_status_code bsp_interrupt_facility_initialize()
{
/* Install exception handler */
if (ppc_exc_set_handler( ASM_EXT_VECTOR, mpc55xx_external_exception_handler)) {
return RTEMS_IO_ERROR;
}
/* Initialize interrupt controller */
/* Software vector mode */
INTC.MCR.B.VTES = 0;
INTC.MCR.B.HVEN = 0;
/* Set current priority to 0 */
INTC.CPR.B.PRI = 0;
return RTEMS_SUCCESSFUL;
}
rtems_status_code bsp_interrupt_vector_enable( rtems_vector_number vector)
{
if (MPC55XX_IRQ_IS_VALID( vector)) {
return mpc55xx_intc_set_priority( vector, MPC55XX_INTC_DEFAULT_PRIORITY);
} else {
return RTEMS_SUCCESSFUL;
}
}
rtems_status_code bsp_interrupt_vector_disable( rtems_vector_number vector)
{
if (MPC55XX_IRQ_IS_VALID( vector)) {
return mpc55xx_intc_set_priority( vector, MPC55XX_INTC_DISABLED_PRIORITY);
} else {
return RTEMS_SUCCESSFUL;
}
}
void bsp_interrupt_handler_default( rtems_vector_number vector)
{
/* Do nothing */
}
|
