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1480 | palkovsky | 1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
1702 | cejka | 29 | /** @addtogroup ppc32 |
30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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1480 | palkovsky | 34 | |
1702 | cejka | 35 | |
1480 | palkovsky | 36 | #include <arch/asm.h> |
37 | #include <arch/drivers/pic.h> |
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38 | #include <byteorder.h> |
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39 | #include <bitops.h> |
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40 | |||
41 | static volatile __u32 *pic; |
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42 | |||
1756 | decky | 43 | void pic_init(__address base, size_t size) |
1480 | palkovsky | 44 | { |
1756 | decky | 45 | pic = (__u32 *) hw_map(base, size); |
1480 | palkovsky | 46 | } |
47 | |||
48 | |||
49 | |||
50 | void pic_enable_interrupt(int intnum) |
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51 | { |
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52 | if (intnum < 32) { |
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53 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
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54 | } else { |
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1625 | decky | 55 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
1480 | palkovsky | 56 | } |
57 | |||
58 | } |
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59 | |||
60 | void pic_disable_interrupt(int intnum) |
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61 | { |
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62 | if (intnum < 32) { |
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63 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
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64 | } else { |
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1625 | decky | 65 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
1480 | palkovsky | 66 | } |
67 | } |
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68 | |||
69 | void pic_ack_interrupt(int intnum) |
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70 | { |
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71 | if (intnum < 32) |
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72 | pic[PIC_ACK_LOW] = 1 << intnum; |
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73 | else |
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1625 | decky | 74 | pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
1480 | palkovsky | 75 | } |
76 | |||
77 | /** Return number of pending interrupt */ |
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78 | int pic_get_pending(void) |
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79 | { |
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80 | int pending; |
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81 | |||
82 | pending = pic[PIC_PENDING_LOW]; |
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83 | if (pending) { |
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84 | return fnzb32(pending); |
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85 | } |
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86 | pending = pic[PIC_PENDING_HIGH]; |
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87 | if (pending) { |
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88 | return fnzb32(pending) + 32; |
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89 | } |
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90 | return -1; |
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91 | } |
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1702 | cejka | 92 | |
93 | /** @} |
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94 | */ |
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95 |