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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Jakub Jermar |
2 | * Copyright (C) 2005 Jakub Jermar |
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 | #include <arch/drivers/tick.h> |
29 | #include <arch/drivers/tick.h> |
30 | #include <arch/interrupt.h> |
30 | #include <arch/interrupt.h> |
31 | #include <arch/asm.h> |
31 | #include <arch/asm.h> |
32 | #include <arch/register.h> |
32 | #include <arch/register.h> |
33 | #include <debug.h> |
33 | #include <debug.h> |
34 | #include <print.h> |
34 | #include <time/clock.h> |
35 | 35 | ||
- | 36 | /** Initialize tick interrupt. */ |
|
36 | void tick_init(void) |
37 | void tick_init(void) |
37 | { |
38 | { |
38 | tick_compare_reg_t compare; |
39 | tick_compare_reg_t compare; |
39 | 40 | ||
40 | interrupt_register(14, "tick_int", tick_interrupt); |
41 | interrupt_register(14, "tick_int", tick_interrupt); |
41 | compare.int_dis = false; |
42 | compare.int_dis = false; |
42 | compare.tick_cmpr = TICK_DELTA; |
43 | compare.tick_cmpr = TICK_DELTA; |
43 | tick_compare_write(compare.value); |
44 | tick_compare_write(compare.value); |
44 | tick_write(0); |
45 | tick_write(0); |
45 | } |
46 | } |
46 | 47 | ||
- | 48 | /** Process tick interrupt. |
|
- | 49 | * |
|
- | 50 | * @param n Interrupt Level, 14, (can be ignored) |
|
- | 51 | * @param stack Stack pointer of the interrupted context. |
|
- | 52 | */ |
|
47 | void tick_interrupt(int n, void *stack) |
53 | void tick_interrupt(int n, void *stack) |
48 | { |
54 | { |
- | 55 | softint_reg_t softint, clear; |
|
- | 56 | ||
- | 57 | softint.value = softint_read(); |
|
- | 58 | ||
- | 59 | /* |
|
- | 60 | * Make sure we are servicing interrupt_level_14 |
|
- | 61 | */ |
|
- | 62 | ASSERT(n == 14); |
|
- | 63 | ||
- | 64 | /* |
|
49 | panic("Unserviced %s.\n", __FUNCTION__); |
65 | * Make sure we are servicing TICK_INT. |
- | 66 | */ |
|
- | 67 | ASSERT(softint.tick_int); |
|
- | 68 | ||
- | 69 | /* |
|
- | 70 | * Clear tick interrupt. |
|
- | 71 | */ |
|
- | 72 | clear.value = 0; |
|
- | 73 | clear.tick_int = 1; |
|
- | 74 | clear_softint_write(clear.value); |
|
- | 75 | ||
- | 76 | /* |
|
- | 77 | * Restart counter. |
|
- | 78 | */ |
|
- | 79 | tick_write(0); |
|
- | 80 | ||
- | 81 | clock(); |
|
50 | } |
82 | } |
51 | 83 |