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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Martin Decky |
2 | * Copyright (c) 2006 Martin Decky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup ppc64interrupt |
29 | /** @addtogroup ppc64interrupt |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <ddi/irq.h> |
35 | #include <ddi/irq.h> |
36 | #include <interrupt.h> |
36 | #include <interrupt.h> |
37 | #include <arch/interrupt.h> |
37 | #include <arch/interrupt.h> |
38 | #include <arch/types.h> |
38 | #include <arch/types.h> |
39 | #include <arch.h> |
39 | #include <arch.h> |
40 | #include <time/clock.h> |
40 | #include <time/clock.h> |
41 | #include <ipc/sysipc.h> |
41 | #include <ipc/sysipc.h> |
42 | #include <arch/drivers/pic.h> |
42 | #include <arch/drivers/pic.h> |
43 | #include <arch/mm/tlb.h> |
43 | #include <arch/mm/tlb.h> |
44 | #include <print.h> |
44 | #include <print.h> |
45 | 45 | ||
46 | 46 | ||
47 | void start_decrementer(void) |
47 | void start_decrementer(void) |
48 | { |
48 | { |
49 | asm volatile ( |
49 | asm volatile ( |
50 | "mtdec %0\n" |
50 | "mtdec %0\n" |
51 | : |
51 | : |
52 | : "r" (1000) |
52 | : "r" (1000) |
53 | ); |
53 | ); |
54 | } |
54 | } |
55 | 55 | ||
56 | 56 | ||
57 | /** Handler of external interrupts */ |
57 | /** Handler of external interrupts */ |
58 | static void exception_external(int n, istate_t *istate) |
58 | static void exception_external(int n, istate_t *istate) |
59 | { |
59 | { |
60 | int inum; |
60 | int inum; |
61 | 61 | ||
62 | while ((inum = pic_get_pending()) != -1) { |
62 | while ((inum = pic_get_pending()) != -1) { |
63 | bool ack = false; |
- | |
64 | irq_t *irq = irq_dispatch_and_lock(inum); |
63 | irq_t *irq = irq_dispatch_and_lock(inum); |
65 | if (irq) { |
64 | if (irq) { |
66 | /* |
65 | /* |
67 | * The IRQ handler was found. |
66 | * The IRQ handler was found. |
68 | */ |
67 | */ |
69 | - | ||
70 | if (irq->preack) { |
- | |
71 | /* Acknowledge the interrupt before processing */ |
- | |
72 | pic_ack_interrupt(inum); |
- | |
73 | ack = true; |
- | |
74 | } |
- | |
75 | - | ||
76 | irq->handler(irq, irq->arg); |
68 | irq->handler(irq, irq->arg); |
77 | spinlock_unlock(&irq->lock); |
69 | spinlock_unlock(&irq->lock); |
78 | } else { |
70 | } else { |
79 | /* |
71 | /* |
80 | * Spurious interrupt. |
72 | * Spurious interrupt. |
81 | */ |
73 | */ |
82 | #ifdef CONFIG_DEBUG |
74 | #ifdef CONFIG_DEBUG |
83 | printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum); |
75 | printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum); |
84 | #endif |
76 | #endif |
85 | } |
77 | } |
86 | - | ||
87 | if (!ack) |
- | |
88 | pic_ack_interrupt(inum); |
78 | pic_ack_interrupt(inum); |
89 | } |
79 | } |
90 | } |
80 | } |
91 | 81 | ||
92 | 82 | ||
93 | static void exception_decrementer(int n, istate_t *istate) |
83 | static void exception_decrementer(int n, istate_t *istate) |
94 | { |
84 | { |
95 | clock(); |
85 | clock(); |
96 | start_decrementer(); |
86 | start_decrementer(); |
97 | } |
87 | } |
98 | 88 | ||
99 | 89 | ||
100 | /* Initialize basic tables for exception dispatching */ |
90 | /* Initialize basic tables for exception dispatching */ |
101 | void interrupt_init(void) |
91 | void interrupt_init(void) |
102 | { |
92 | { |
103 | exc_register(VECTOR_EXTERNAL, "external", exception_external); |
93 | exc_register(VECTOR_EXTERNAL, "external", exception_external); |
104 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
94 | exc_register(VECTOR_DECREMENTER, "timer", exception_decrementer); |
105 | } |
95 | } |
106 | 96 | ||
107 | /** @} |
97 | /** @} |
108 | */ |
98 | */ |
109 | 99 |