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git.ipfire.org Git - people/ms/u-boot.git/blob - cpu/mpc5xxx/interrupts.c
8816dd1e2dc4fccf6c378411ff8c81238b6ede15
3 * Detlev Zundel, DENX Software Engineering, dzu@denx.de
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 /* this section was ripped out of arch/ppc/syslib/mpc52xx_pic.c in the
31 * Linux 2.6 source with the following copyright.
33 * Based on (well, mostly copied from) the code from the 2.4 kernel by
34 * Dale Farnsworth <dfarnsworth@mvista.com> and Kent Borg.
36 * Copyright (C) 2004 Sylvain Munaut <tnt@246tNt.com>
37 * Copyright (C) 2003 Montavista Software, Inc
41 #include <asm/processor.h>
46 interrupt_handler_t
*handler
;
51 static struct irq_action irq_handlers
[NR_IRQS
];
53 static struct mpc5xxx_intr
*intr
;
54 static struct mpc5xxx_sdma
*sdma
;
56 static void mpc5xxx_ic_disable(unsigned int irq
)
60 if (irq
== MPC5XXX_IRQ0
) {
61 val
= in_be32(&intr
->ctrl
);
63 out_be32(&intr
->ctrl
, val
);
64 } else if (irq
< MPC5XXX_IRQ1
) {
66 } else if (irq
<= MPC5XXX_IRQ3
) {
67 val
= in_be32(&intr
->ctrl
);
68 val
&= ~(1 << (10 - (irq
- MPC5XXX_IRQ1
)));
69 out_be32(&intr
->ctrl
, val
);
70 } else if (irq
< MPC5XXX_SDMA_IRQ_BASE
) {
71 val
= in_be32(&intr
->main_mask
);
72 val
|= 1 << (16 - (irq
- MPC5XXX_MAIN_IRQ_BASE
));
73 out_be32(&intr
->main_mask
, val
);
74 } else if (irq
< MPC5XXX_PERP_IRQ_BASE
) {
75 val
= in_be32(&sdma
->IntMask
);
76 val
|= 1 << (irq
- MPC5XXX_SDMA_IRQ_BASE
);
77 out_be32(&sdma
->IntMask
, val
);
79 val
= in_be32(&intr
->per_mask
);
80 val
|= 1 << (31 - (irq
- MPC5XXX_PERP_IRQ_BASE
));
81 out_be32(&intr
->per_mask
, val
);
85 static void mpc5xxx_ic_enable(unsigned int irq
)
89 if (irq
== MPC5XXX_IRQ0
) {
90 val
= in_be32(&intr
->ctrl
);
92 out_be32(&intr
->ctrl
, val
);
93 } else if (irq
< MPC5XXX_IRQ1
) {
95 } else if (irq
<= MPC5XXX_IRQ3
) {
96 val
= in_be32(&intr
->ctrl
);
97 val
|= 1 << (10 - (irq
- MPC5XXX_IRQ1
));
98 out_be32(&intr
->ctrl
, val
);
99 } else if (irq
< MPC5XXX_SDMA_IRQ_BASE
) {
100 val
= in_be32(&intr
->main_mask
);
101 val
&= ~(1 << (16 - (irq
- MPC5XXX_MAIN_IRQ_BASE
)));
102 out_be32(&intr
->main_mask
, val
);
103 } else if (irq
< MPC5XXX_PERP_IRQ_BASE
) {
104 val
= in_be32(&sdma
->IntMask
);
105 val
&= ~(1 << (irq
- MPC5XXX_SDMA_IRQ_BASE
));
106 out_be32(&sdma
->IntMask
, val
);
108 val
= in_be32(&intr
->per_mask
);
109 val
&= ~(1 << (31 - (irq
- MPC5XXX_PERP_IRQ_BASE
)));
110 out_be32(&intr
->per_mask
, val
);
114 static void mpc5xxx_ic_ack(unsigned int irq
)
119 * Only some irqs are reset here, others in interrupting hardware.
124 val
= in_be32(&intr
->ctrl
);
126 out_be32(&intr
->ctrl
, val
);
128 case MPC5XXX_CCS_IRQ
:
129 val
= in_be32(&intr
->enc_status
);
131 out_be32(&intr
->enc_status
, val
);
134 val
= in_be32(&intr
->ctrl
);
136 out_be32(&intr
->ctrl
, val
);
139 val
= in_be32(&intr
->ctrl
);
141 out_be32(&intr
->ctrl
, val
);
144 val
= in_be32(&intr
->ctrl
);
146 out_be32(&intr
->ctrl
, val
);
149 if (irq
>= MPC5XXX_SDMA_IRQ_BASE
150 && irq
< (MPC5XXX_SDMA_IRQ_BASE
+ MPC5XXX_SDMA_IRQ_NUM
)) {
151 out_be32(&sdma
->IntPend
,
152 1 << (irq
- MPC5XXX_SDMA_IRQ_BASE
));
158 static void mpc5xxx_ic_disable_and_ack(unsigned int irq
)
160 mpc5xxx_ic_disable(irq
);
164 static void mpc5xxx_ic_end(unsigned int irq
)
166 mpc5xxx_ic_enable(irq
);
169 void mpc5xxx_init_irq(void)
173 /* Remap the necessary zones */
174 intr
= (struct mpc5xxx_intr
*)(MPC5XXX_ICTL
);
175 sdma
= (struct mpc5xxx_sdma
*)(MPC5XXX_SDMA
);
177 /* Disable all interrupt sources. */
178 out_be32(&sdma
->IntPend
, 0xffffffff); /* 1 means clear pending */
179 out_be32(&sdma
->IntMask
, 0xffffffff); /* 1 means disabled */
180 out_be32(&intr
->per_mask
, 0x7ffffc00); /* 1 means disabled */
181 out_be32(&intr
->main_mask
, 0x00010fff); /* 1 means disabled */
182 intr_ctrl
= in_be32(&intr
->ctrl
);
183 intr_ctrl
|= 0x0f000000 | /* clear IRQ 0-3 */
184 0x00ff0000 | /* IRQ 0-3 level sensitive low active */
185 0x00001000 | /* MEE master external enable */
186 0x00000000 | /* 0 means disable IRQ 0-3 */
187 0x00000001; /* CEb route critical normally */
188 out_be32(&intr
->ctrl
, intr_ctrl
);
190 /* Zero a bunch of the priority settings. */
191 out_be32(&intr
->per_pri1
, 0);
192 out_be32(&intr
->per_pri2
, 0);
193 out_be32(&intr
->per_pri3
, 0);
194 out_be32(&intr
->main_pri1
, 0);
195 out_be32(&intr
->main_pri2
, 0);
198 int mpc5xxx_get_irq(struct pt_regs
*regs
)
203 status
= in_be32(&intr
->enc_status
);
205 if (status
& 0x00000400) { /* critical */
206 irq
= (status
>> 8) & 0x3;
207 if (irq
== 2) /* high priority peripheral */
209 irq
+= MPC5XXX_CRIT_IRQ_BASE
;
210 } else if (status
& 0x00200000) { /* main */
211 irq
= (status
>> 16) & 0x1f;
212 if (irq
== 4) /* low priority peripheral */
214 irq
+= MPC5XXX_MAIN_IRQ_BASE
;
215 } else if (status
& 0x20000000) { /* peripheral */
217 irq
= (status
>> 24) & 0x1f;
218 if (irq
== 0) { /* bestcomm */
219 status
= in_be32(&sdma
->IntPend
);
220 irq
= ffs(status
) + MPC5XXX_SDMA_IRQ_BASE
- 1;
222 irq
+= MPC5XXX_PERP_IRQ_BASE
;
228 /****************************************************************************/
230 int interrupt_init_cpu(ulong
* decrementer_count
)
232 *decrementer_count
= get_tbclk() / CFG_HZ
;
239 /****************************************************************************/
242 * Handle external interrupts
244 void external_interrupt(struct pt_regs
*regs
)
248 irq
= mpc5xxx_get_irq(regs
);
250 mpc5xxx_ic_disable_and_ack(irq
);
254 if (irq_handlers
[irq
].handler
!= NULL
)
255 (*irq_handlers
[irq
].handler
) (irq_handlers
[irq
].arg
);
257 printf("\nBogus External Interrupt IRQ %d\n", irq
);
259 * turn off the bogus interrupt, otherwise it
260 * might repeat forever
269 void timer_interrupt_cpu(struct pt_regs
*regs
)
271 /* nothing to do here */
275 /****************************************************************************/
278 * Install and free a interrupt handler.
281 void irq_install_handler(int irq
, interrupt_handler_t
* handler
, void *arg
)
283 if (irq
< 0 || irq
>= NR_IRQS
) {
284 printf("irq_install_handler: bad irq number %d\n", irq
);
288 if (irq_handlers
[irq
].handler
!= NULL
)
289 printf("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
290 (ulong
) handler
, (ulong
) irq_handlers
[irq
].handler
);
292 irq_handlers
[irq
].handler
= handler
;
293 irq_handlers
[irq
].arg
= arg
;
295 mpc5xxx_ic_enable(irq
);
298 void irq_free_handler(int irq
)
300 if (irq
< 0 || irq
>= NR_IRQS
) {
301 printf("irq_free_handler: bad irq number %d\n", irq
);
305 mpc5xxx_ic_disable(irq
);
307 irq_handlers
[irq
].handler
= NULL
;
308 irq_handlers
[irq
].arg
= NULL
;
311 /****************************************************************************/
313 #if defined(CONFIG_CMD_IRQ)
314 void do_irqinfo(cmd_tbl_t
* cmdtp
, bd_t
* bd
, int flag
, int argc
, char *argv
[])
318 char *irq_config
[] = { "level sensitive, active high",
319 "edge sensitive, rising active edge",
320 "edge sensitive, falling active edge",
321 "level sensitive, active low"
324 re_enable
= disable_interrupts();
326 intr_ctrl
= in_be32(&intr
->ctrl
);
327 printf("Interrupt configuration:\n");
329 for (irq
= 0; irq
<= 3; irq
++) {
330 printf("IRQ%d: %s\n", irq
,
331 irq_config
[(intr_ctrl
>> (22 - 2 * irq
)) & 0x3]);
334 puts("\nInterrupt-Information:\n" "Nr Routine Arg Count\n");
336 for (irq
= 0; irq
< NR_IRQS
; irq
++)
337 if (irq_handlers
[irq
].handler
!= NULL
)
338 printf("%02d %08lx %08lx %ld\n", irq
,
339 (ulong
) irq_handlers
[irq
].handler
,
340 (ulong
) irq_handlers
[irq
].arg
,
341 irq_handlers
[irq
].count
);