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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* (C) Copyright 2007 Michal Simek
* (C) Copyright 2004 Atmark Techno, Inc.
*
* Michal SIMEK <monstr@monstr.eu>
* Yasushi SHOJI <yashi@atmark-techno.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <asm/microblaze_intc.h>
#include <asm/asm.h>
#undef DEBUG_INT
extern void microblaze_disable_interrupts (void);
extern void microblaze_enable_interrupts (void);
void enable_interrupts (void)
{
microblaze_enable_interrupts ();
}
int disable_interrupts (void)
{
microblaze_disable_interrupts ();
return 0;
}
#ifdef CFG_INTC_0
#ifdef CFG_TIMER_0
extern void timer_init (void);
#endif
static struct irq_action vecs[CFG_INTC_0_NUM];
/* mapping structure to interrupt controller */
microblaze_intc_t *intc = (microblaze_intc_t *) (CFG_INTC_0_ADDR);
/* default handler */
void def_hdlr (void)
{
puts ("def_hdlr\n");
}
void enable_one_interrupt (int irq)
{
int mask;
int offset = 1;
offset <<= irq;
mask = intc->ier;
intc->ier = (mask | offset);
#ifdef DEBUG_INT
printf ("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
intc->ier);
printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
intc->iar, intc->mer);
#endif
}
void disable_one_interrupt (int irq)
{
int mask;
int offset = 1;
offset <<= irq;
mask = intc->ier;
intc->ier = (mask & ~offset);
#ifdef DEBUG_INT
printf ("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
intc->ier);
printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
intc->iar, intc->mer);
#endif
}
/* adding new handler for interrupt */
void install_interrupt_handler (int irq, interrupt_handler_t * hdlr, void *arg)
{
struct irq_action *act;
/* irq out of range */
if ((irq < 0) || (irq > CFG_INTC_0_NUM)) {
puts ("IRQ out of range\n");
return;
}
act = &vecs[irq];
if (hdlr) { /* enable */
act->handler = hdlr;
act->arg = arg;
act->count = 0;
enable_one_interrupt (irq);
} else { /* disable */
act->handler = (interrupt_handler_t *) def_hdlr;
act->arg = (void *)irq;
disable_one_interrupt (irq);
}
}
/* initialization interrupt controller - hardware */
void intc_init (void)
{
intc->mer = 0;
intc->ier = 0;
intc->iar = 0xFFFFFFFF;
/* XIntc_Start - hw_interrupt enable and all interrupt enable */
intc->mer = 0x3;
#ifdef DEBUG_INT
printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
intc->iar, intc->mer);
#endif
}
int interrupts_init (void)
{
int i;
/* initialize irq list */
for (i = 0; i < CFG_INTC_0_NUM; i++) {
vecs[i].handler = (interrupt_handler_t *) def_hdlr;
vecs[i].arg = (void *)i;
vecs[i].count = 0;
}
/* initialize intc controller */
intc_init ();
#ifdef CFG_TIMER_0
timer_init ();
#endif
enable_interrupts ();
return 0;
}
void interrupt_handler (void)
{
int irqs = (intc->isr & intc->ier); /* find active interrupt */
int i = 1;
#ifdef DEBUG_INT
int value;
printf ("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
intc->iar, intc->mer);
R14(value);
printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
#endif
struct irq_action *act = vecs;
while (irqs) {
if (irqs & 1) {
#ifdef DEBUG_INT
printf
("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
act->handler, act->count, act->arg);
#endif
act->handler (act->arg);
act->count++;
intc->iar = i;
return;
}
irqs >>= 1;
act++;
i <<= 1;
}
#ifdef DEBUG_INT
printf ("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
intc->ier, intc->iar, intc->mer);
R14(value);
printf ("Interrupt handler on %x line, r14 %x\n", irqs, value);
#endif
}
#endif
#if (CONFIG_COMMANDS & CFG_CMD_IRQ)
#ifdef CFG_INTC_0
int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int i;
struct irq_action *act = vecs;
puts ("\nInterrupt-Information:\n\n"
"Nr Routine Arg Count\n"
"-----------------------------\n");
for (i = 0; i < CFG_INTC_0_NUM; i++) {
if (act->handler != (interrupt_handler_t*) def_hdlr) {
printf ("%02d %08lx %08lx %d\n", i,
(int)act->handler, (int)act->arg, act->count);
}
act++;
}
puts ("\n");
return (0);
}
#else
int do_irqinfo (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
puts ("Undefined interrupt controller\n");
}
#endif
#endif /* CONFIG_COMMANDS & CFG_CMD_IRQ */
|
