1 |
bfff30bf
|
laforge
|
/* SAM7S system interrupt demultiplexer
|
2 |
|
|
* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
|
3 |
|
|
*
|
4 |
|
|
* This program is free software; you can redistribute it and/or modify
|
5 |
|
|
* it under the terms of the GNU General Public License as published by
|
6 |
|
|
* the Free Software Foundation; either version 2 of the License, or
|
7 |
|
|
* (at your option) any later version.
|
8 |
|
|
*
|
9 |
|
|
* This program is distributed in the hope that it will be useful,
|
10 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
11 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
12 |
|
|
* GNU General Public License for more details.
|
13 |
|
|
*
|
14 |
|
|
* You should have received a copy of the GNU General Public License
|
15 |
|
|
* along with this program; if not, write to the Free Software
|
16 |
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
17 |
|
|
*
|
18 |
|
|
*/
|
19 |
|
|
|
20 |
|
|
#undef DEBUG
|
21 |
|
|
|
22 |
|
|
#include <sys/types.h>
|
23 |
|
|
#include <lib_AT91SAM7.h>
|
24 |
|
|
#include <AT91SAM7.h>
|
25 |
|
|
|
26 |
|
|
#include <os/system_irq.h>
|
27 |
|
|
#include <os/dbgu.h>
|
28 |
8701086c
|
Min Xu
|
#include <string.h>
|
29 |
bfff30bf
|
laforge
|
|
30 |
|
|
#include "../openpcd.h"
|
31 |
|
|
|
32 |
|
|
static sysirq_hdlr *sysirq_hdlrs[AT91SAM7_SYSIRQ_COUNT];
|
33 |
|
|
|
34 |
373c172a
|
Harald Welte
|
void sys_irq(uint32_t previous_pc)
|
35 |
bfff30bf
|
laforge
|
{
|
36 |
373c172a
|
Harald Welte
|
uint32_t sr;
|
37 |
bfff30bf
|
laforge
|
|
38 |
|
|
/* Somehow Atmel decided to do really stupid interrupt sharing
|
39 |
|
|
* for commonly-used interrupts such as the timer irq */
|
40 |
|
|
|
41 |
|
|
/* dbgu */
|
42 |
|
|
if (*AT91C_DBGU_IMR) {
|
43 |
|
|
sr = *AT91C_DBGU_CSR;
|
44 |
|
|
if (sr & *AT91C_DBGU_IMR) {
|
45 |
f796b3e4
|
laforge
|
DEBUGP("DBGU(");
|
46 |
bfff30bf
|
laforge
|
if (sysirq_hdlrs[AT91SAM7_SYSIRQ_DBGU]) {
|
47 |
|
|
DEBUGP("handler ");
|
48 |
|
|
sysirq_hdlrs[AT91SAM7_SYSIRQ_DBGU](sr);
|
49 |
|
|
} else {
|
50 |
|
|
*AT91C_DBGU_IDR = *AT91C_DBGU_IMR;
|
51 |
|
|
DEBUGP("no handler ");
|
52 |
|
|
}
|
53 |
f796b3e4
|
laforge
|
DEBUGP(") ");
|
54 |
bfff30bf
|
laforge
|
}
|
55 |
|
|
}
|
56 |
|
|
|
57 |
|
|
/* pit_irq */
|
58 |
|
|
if (*AT91C_PITC_PIMR & AT91C_PITC_PITIEN) {
|
59 |
|
|
sr = *AT91C_PITC_PISR;
|
60 |
|
|
if (sr & AT91C_PITC_PITS) {
|
61 |
|
|
if (sysirq_hdlrs[AT91SAM7_SYSIRQ_PIT]) {
|
62 |
|
|
sysirq_hdlrs[AT91SAM7_SYSIRQ_PIT](sr);
|
63 |
|
|
} else {
|
64 |
f796b3e4
|
laforge
|
DEBUGP("no handler DISABLE_PIT ");
|
65 |
bfff30bf
|
laforge
|
*AT91C_PITC_PIMR &= ~AT91C_PITC_PITIEN;
|
66 |
|
|
}
|
67 |
|
|
}
|
68 |
|
|
}
|
69 |
|
|
|
70 |
|
|
/* rtt_irq */
|
71 |
|
|
if (*AT91C_RTTC_RTMR & (AT91C_RTTC_ALMIEN|AT91C_RTTC_RTTINCIEN)) {
|
72 |
|
|
sr = *AT91C_RTTC_RTSR;
|
73 |
|
|
if (sr) {
|
74 |
f796b3e4
|
laforge
|
DEBUGP("RTT(");
|
75 |
|
|
if (sysirq_hdlrs[AT91SAM7_SYSIRQ_RTT]) {
|
76 |
|
|
DEBUGP("handler ");
|
77 |
bfff30bf
|
laforge
|
sysirq_hdlrs[AT91SAM7_SYSIRQ_RTT](sr);
|
78 |
f796b3e4
|
laforge
|
} else {
|
79 |
bfff30bf
|
laforge
|
*AT91C_RTTC_RTMR &= ~(AT91C_RTTC_ALMIEN|
|
80 |
|
|
AT91C_RTTC_RTTINCIEN);
|
81 |
f796b3e4
|
laforge
|
DEBUGP("no handler ");
|
82 |
|
|
}
|
83 |
|
|
DEBUGP(") ");
|
84 |
bfff30bf
|
laforge
|
}
|
85 |
|
|
}
|
86 |
|
|
|
87 |
|
|
/* pmc_irq */
|
88 |
|
|
if (*AT91C_PMC_IMR) {
|
89 |
|
|
sr = *AT91C_PMC_SR;
|
90 |
|
|
if (sr & *AT91C_PMC_IMR) {
|
91 |
f796b3e4
|
laforge
|
DEBUGP("PMC(");
|
92 |
|
|
if (sysirq_hdlrs[AT91SAM7_SYSIRQ_PMC]) {
|
93 |
|
|
DEBUGP("handler ");
|
94 |
bfff30bf
|
laforge
|
sysirq_hdlrs[AT91SAM7_SYSIRQ_PMC](sr);
|
95 |
f796b3e4
|
laforge
|
} else {
|
96 |
bfff30bf
|
laforge
|
*AT91C_PMC_IDR = *AT91C_PMC_IMR;
|
97 |
f796b3e4
|
laforge
|
DEBUGP("no handler ");
|
98 |
|
|
}
|
99 |
|
|
DEBUGP(") ");
|
100 |
bfff30bf
|
laforge
|
}
|
101 |
|
|
}
|
102 |
|
|
|
103 |
|
|
/* rstc_irq */
|
104 |
|
|
if (*AT91C_RSTC_RMR & (AT91C_RSTC_URSTIEN|AT91C_RSTC_BODIEN)) {
|
105 |
|
|
sr = *AT91C_RSTC_RSR;
|
106 |
|
|
if (sr & (AT91C_RSTC_URSTS|AT91C_RSTC_BODSTS)) {
|
107 |
f796b3e4
|
laforge
|
DEBUGP("RSTC(");
|
108 |
|
|
if (sysirq_hdlrs[AT91SAM7_SYSIRQ_RSTC]) {
|
109 |
|
|
DEBUGP("handler ");
|
110 |
bfff30bf
|
laforge
|
sysirq_hdlrs[AT91SAM7_SYSIRQ_RSTC](sr);
|
111 |
f796b3e4
|
laforge
|
} else {
|
112 |
bfff30bf
|
laforge
|
*AT91C_RSTC_RMR &= ~(AT91C_RSTC_URSTIEN|
|
113 |
|
|
AT91C_RSTC_BODIEN);
|
114 |
f796b3e4
|
laforge
|
DEBUGP("no handler ");
|
115 |
|
|
}
|
116 |
|
|
DEBUGP(") ");
|
117 |
bfff30bf
|
laforge
|
}
|
118 |
|
|
}
|
119 |
|
|
|
120 |
|
|
/* mc_irq */
|
121 |
|
|
if (*AT91C_MC_FMR & (AT91C_MC_LOCKE | AT91C_MC_PROGE)) {
|
122 |
|
|
sr = *AT91C_MC_FSR;
|
123 |
|
|
if ((*AT91C_MC_FMR & AT91C_MC_LOCKE && (sr & AT91C_MC_LOCKE))||
|
124 |
|
|
(*AT91C_MC_FMR & AT91C_MC_PROGE && (sr & AT91C_MC_PROGE))){
|
125 |
f796b3e4
|
laforge
|
DEBUGP("EFC(");
|
126 |
|
|
if (sysirq_hdlrs[AT91SAM7_SYSIRQ_EFC]) {
|
127 |
|
|
DEBUGP("handler ");
|
128 |
bfff30bf
|
laforge
|
sysirq_hdlrs[AT91SAM7_SYSIRQ_EFC](sr);
|
129 |
f796b3e4
|
laforge
|
} else {
|
130 |
bfff30bf
|
laforge
|
*AT91C_MC_FMR &= ~(AT91C_MC_LOCKE |
|
131 |
|
|
AT91C_MC_PROGE);
|
132 |
f796b3e4
|
laforge
|
DEBUGP("no handler ");
|
133 |
|
|
}
|
134 |
|
|
DEBUGP(") ");
|
135 |
bfff30bf
|
laforge
|
}
|
136 |
|
|
}
|
137 |
|
|
|
138 |
|
|
/* wdt_irq */
|
139 |
|
|
if (*AT91C_WDTC_WDMR & AT91C_WDTC_WDFIEN) {
|
140 |
|
|
sr = *AT91C_WDTC_WDSR;
|
141 |
|
|
if (sr) {
|
142 |
8701086c
|
Min Xu
|
char dbg_buf[100];
|
143 |
|
|
sprintf(dbg_buf, "sys_irq [Old PC = %08X]\n\r", previous_pc);
|
144 |
|
|
AT91F_DBGU_Frame(dbg_buf);
|
145 |
|
|
|
146 |
f796b3e4
|
laforge
|
DEBUGP("WDT(");
|
147 |
|
|
if (sysirq_hdlrs[AT91SAM7_SYSIRQ_WDT]) {
|
148 |
|
|
DEBUGP("handler ");
|
149 |
bfff30bf
|
laforge
|
sysirq_hdlrs[AT91SAM7_SYSIRQ_WDT](sr);
|
150 |
f796b3e4
|
laforge
|
} else {
|
151 |
|
|
/* we can't disable it... */
|
152 |
|
|
DEBUGP("no handler ");
|
153 |
|
|
}
|
154 |
|
|
DEBUGP(") ");
|
155 |
bfff30bf
|
laforge
|
}
|
156 |
|
|
}
|
157 |
|
|
AT91F_AIC_ClearIt(AT91C_BASE_AIC, AT91C_ID_SYS);
|
158 |
f796b3e4
|
laforge
|
DEBUGPCR("END");
|
159 |
bfff30bf
|
laforge
|
}
|
160 |
|
|
|
161 |
8701086c
|
Min Xu
|
static void sysirq_entry(void)
|
162 |
|
|
{
|
163 |
|
|
/* DON'T MODIFY THIS SECTION AND Cstartup.S/IRQ_Handler_Entry */
|
164 |
|
|
register unsigned *previous_pc asm("r0");
|
165 |
|
|
asm("ADD R1, SP, #16; LDR R0, [R1]");
|
166 |
|
|
sys_irq(previous_pc);
|
167 |
|
|
}
|
168 |
|
|
|
169 |
bfff30bf
|
laforge
|
void sysirq_register(enum sysirqs irq, sysirq_hdlr *hdlr)
|
170 |
|
|
{
|
171 |
|
|
if (irq >= AT91SAM7_SYSIRQ_COUNT)
|
172 |
|
|
return;
|
173 |
|
|
|
174 |
|
|
sysirq_hdlrs[irq] = hdlr;
|
175 |
|
|
}
|
176 |
|
|
|
177 |
|
|
void sysirq_init(void)
|
178 |
|
|
{
|
179 |
|
|
AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_SYS,
|
180 |
|
|
OPENPCD_IRQ_PRIO_SYS,
|
181 |
f796b3e4
|
laforge
|
AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL,
|
182 |
8701086c
|
Min Xu
|
&sysirq_entry);
|
183 |
bfff30bf
|
laforge
|
AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_SYS);
|
184 |
|
|
}
|