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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
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 | 29 | ||
30 | #include <arch/asm.h> |
30 | #include <arch/asm.h> |
31 | #include <arch/drivers/pic.h> |
31 | #include <arch/drivers/pic.h> |
32 | #include <byteorder.h> |
32 | #include <byteorder.h> |
33 | #include <bitops.h> |
33 | #include <bitops.h> |
34 | 34 | ||
35 | static volatile __u32 *pic; |
35 | static volatile __u32 *pic; |
36 | 36 | ||
37 | void pic_init(void) |
37 | void pic_init(void) |
38 | { |
38 | { |
39 | pic = (__u32 *)hw_map(PIC_HW_ADDR, PAGE_SIZE); |
39 | pic = (__u32 *)hw_map(PIC_HW_ADDR, PAGE_SIZE); |
40 | } |
40 | } |
41 | 41 | ||
42 | 42 | ||
43 | 43 | ||
44 | void pic_enable_interrupt(int intnum) |
44 | void pic_enable_interrupt(int intnum) |
45 | { |
45 | { |
46 | if (intnum < 32) { |
46 | if (intnum < 32) { |
47 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
47 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
48 | } else { |
48 | } else { |
49 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum-32)); |
49 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
50 | } |
50 | } |
51 | 51 | ||
52 | } |
52 | } |
53 | 53 | ||
54 | void pic_disable_interrupt(int intnum) |
54 | void pic_disable_interrupt(int intnum) |
55 | { |
55 | { |
56 | if (intnum < 32) { |
56 | if (intnum < 32) { |
57 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
57 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
58 | } else { |
58 | } else { |
59 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum-32))); |
59 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
60 | } |
60 | } |
61 | } |
61 | } |
62 | 62 | ||
63 | void pic_ack_interrupt(int intnum) |
63 | void pic_ack_interrupt(int intnum) |
64 | { |
64 | { |
65 | if (intnum < 32) |
65 | if (intnum < 32) |
66 | pic[PIC_ACK_LOW] = 1 << intnum; |
66 | pic[PIC_ACK_LOW] = 1 << intnum; |
67 | else |
67 | else |
68 | pic[PIC_ACK_HIGH] = 1 << (intnum-32); |
68 | pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
69 | } |
69 | } |
70 | 70 | ||
71 | /** Return number of pending interrupt */ |
71 | /** Return number of pending interrupt */ |
72 | int pic_get_pending(void) |
72 | int pic_get_pending(void) |
73 | { |
73 | { |
74 | int pending; |
74 | int pending; |
75 | 75 | ||
76 | pending = pic[PIC_PENDING_LOW]; |
76 | pending = pic[PIC_PENDING_LOW]; |
77 | if (pending) { |
77 | if (pending) { |
78 | return fnzb32(pending); |
78 | return fnzb32(pending); |
79 | } |
79 | } |
80 | pending = pic[PIC_PENDING_HIGH]; |
80 | pending = pic[PIC_PENDING_HIGH]; |
81 | if (pending) { |
81 | if (pending) { |
82 | return fnzb32(pending) + 32; |
82 | return fnzb32(pending) + 32; |
83 | } |
83 | } |
84 | return -1; |
84 | return -1; |
85 | } |
85 | } |
86 | 86 |