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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 | /** @addtogroup ppc32 |
|
| - | 30 | * @{ |
|
| - | 31 | */ |
|
| - | 32 | /** @file |
|
| - | 33 | */ |
|
| - | 34 | ||
| 29 | 35 | ||
| 30 | #include <arch/asm.h> |
36 | #include <arch/asm.h> |
| 31 | #include <arch/drivers/pic.h> |
37 | #include <arch/drivers/pic.h> |
| 32 | #include <byteorder.h> |
38 | #include <byteorder.h> |
| 33 | #include <bitops.h> |
39 | #include <bitops.h> |
| 34 | 40 | ||
| 35 | static volatile __u32 *pic; |
41 | static volatile __u32 *pic; |
| 36 | 42 | ||
| 37 | void pic_init(void) |
43 | void pic_init(void) |
| 38 | { |
44 | { |
| 39 | pic = (__u32 *)hw_map(PIC_HW_ADDR, PAGE_SIZE); |
45 | pic = (__u32 *)hw_map(PIC_HW_ADDR, PAGE_SIZE); |
| 40 | } |
46 | } |
| 41 | 47 | ||
| 42 | 48 | ||
| 43 | 49 | ||
| 44 | void pic_enable_interrupt(int intnum) |
50 | void pic_enable_interrupt(int intnum) |
| 45 | { |
51 | { |
| 46 | if (intnum < 32) { |
52 | if (intnum < 32) { |
| 47 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
53 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
| 48 | } else { |
54 | } else { |
| 49 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
55 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
| 50 | } |
56 | } |
| 51 | 57 | ||
| 52 | } |
58 | } |
| 53 | 59 | ||
| 54 | void pic_disable_interrupt(int intnum) |
60 | void pic_disable_interrupt(int intnum) |
| 55 | { |
61 | { |
| 56 | if (intnum < 32) { |
62 | if (intnum < 32) { |
| 57 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
63 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
| 58 | } else { |
64 | } else { |
| 59 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
65 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
| 60 | } |
66 | } |
| 61 | } |
67 | } |
| 62 | 68 | ||
| 63 | void pic_ack_interrupt(int intnum) |
69 | void pic_ack_interrupt(int intnum) |
| 64 | { |
70 | { |
| 65 | if (intnum < 32) |
71 | if (intnum < 32) |
| 66 | pic[PIC_ACK_LOW] = 1 << intnum; |
72 | pic[PIC_ACK_LOW] = 1 << intnum; |
| 67 | else |
73 | else |
| 68 | pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
74 | pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
| 69 | } |
75 | } |
| 70 | 76 | ||
| 71 | /** Return number of pending interrupt */ |
77 | /** Return number of pending interrupt */ |
| 72 | int pic_get_pending(void) |
78 | int pic_get_pending(void) |
| 73 | { |
79 | { |
| 74 | int pending; |
80 | int pending; |
| 75 | 81 | ||
| 76 | pending = pic[PIC_PENDING_LOW]; |
82 | pending = pic[PIC_PENDING_LOW]; |
| 77 | if (pending) { |
83 | if (pending) { |
| 78 | return fnzb32(pending); |
84 | return fnzb32(pending); |
| 79 | } |
85 | } |
| 80 | pending = pic[PIC_PENDING_HIGH]; |
86 | pending = pic[PIC_PENDING_HIGH]; |
| 81 | if (pending) { |
87 | if (pending) { |
| 82 | return fnzb32(pending) + 32; |
88 | return fnzb32(pending) + 32; |
| 83 | } |
89 | } |
| 84 | return -1; |
90 | return -1; |
| 85 | } |
91 | } |
| - | 92 | ||
| - | 93 | /** @} |
|
| - | 94 | */ |
|
| - | 95 | ||
| 86 | 96 | ||