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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 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 | |||
| 29 | |||
| 30 | #include <arch/asm.h> |
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| 31 | #include <arch/drivers/pic.h> |
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| 32 | #include <byteorder.h> |
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| 33 | #include <bitops.h> |
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| 34 | |||
| 35 | static volatile __u32 *pic; |
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| 36 | |||
| 37 | void pic_init(void) |
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| 38 | { |
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| 39 | pic = (__u32 *)hw_map(PIC_HW_ADDR, PAGE_SIZE); |
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| 40 | } |
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| 41 | |||
| 42 | |||
| 43 | |||
| 44 | void pic_enable_interrupt(int intnum) |
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| 45 | { |
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| 46 | if (intnum < 32) { |
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| 47 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
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| 48 | } else { |
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| 1625 | decky | 49 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
| 1480 | palkovsky | 50 | } |
| 51 | |||
| 52 | } |
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| 53 | |||
| 54 | void pic_disable_interrupt(int intnum) |
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| 55 | { |
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| 56 | if (intnum < 32) { |
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| 57 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
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| 58 | } else { |
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| 1625 | decky | 59 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
| 1480 | palkovsky | 60 | } |
| 61 | } |
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| 62 | |||
| 63 | void pic_ack_interrupt(int intnum) |
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| 64 | { |
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| 65 | if (intnum < 32) |
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| 66 | pic[PIC_ACK_LOW] = 1 << intnum; |
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| 67 | else |
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| 1625 | decky | 68 | pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
| 1480 | palkovsky | 69 | } |
| 70 | |||
| 71 | /** Return number of pending interrupt */ |
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| 72 | int pic_get_pending(void) |
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| 73 | { |
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| 74 | int pending; |
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| 75 | |||
| 76 | pending = pic[PIC_PENDING_LOW]; |
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| 77 | if (pending) { |
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| 78 | return fnzb32(pending); |
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| 79 | } |
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| 80 | pending = pic[PIC_PENDING_HIGH]; |
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| 81 | if (pending) { |
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| 82 | return fnzb32(pending) + 32; |
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| 83 | } |
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| 84 | return -1; |
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| 85 | } |