Rev 4341 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1480 | palkovsky | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Ondrej Palkovsky |
| 1480 | palkovsky | 3 | * All rights reserved. |
| 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 | |||
| 4348 | svoboda | 29 | /** @addtogroup ppc32 |
| 1702 | cejka | 30 | * @{ |
| 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/drivers/pic.h> |
| 2089 | decky | 37 | #include <mm/page.h> |
| 1480 | palkovsky | 38 | #include <byteorder.h> |
| 39 | #include <bitops.h> |
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| 40 | |||
| 4341 | svoboda | 41 | static volatile uint32_t *pic = NULL; |
| 1480 | palkovsky | 42 | |
| 4348 | svoboda | 43 | void pic_init(uintptr_t base, size_t size, cir_t *cir, void **cir_arg) |
| 1480 | palkovsky | 44 | { |
| 1780 | jermar | 45 | pic = (uint32_t *) hw_map(base, size); |
| 4348 | svoboda | 46 | *cir = pic_ack_interrupt; |
| 47 | *cir_arg = NULL; |
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| 1480 | palkovsky | 48 | } |
| 49 | |||
| 4348 | svoboda | 50 | void pic_enable_interrupt(inr_t intnum) |
| 1480 | palkovsky | 51 | { |
| 4341 | svoboda | 52 | if (pic) { |
| 53 | if (intnum < 32) |
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| 54 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
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| 55 | else |
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| 56 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
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| 1480 | palkovsky | 57 | } |
| 58 | |||
| 59 | } |
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| 60 | |||
| 4348 | svoboda | 61 | void pic_disable_interrupt(inr_t intnum) |
| 1480 | palkovsky | 62 | { |
| 4341 | svoboda | 63 | if (pic) { |
| 64 | if (intnum < 32) |
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| 65 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
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| 66 | else |
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| 67 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
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| 1480 | palkovsky | 68 | } |
| 69 | } |
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| 70 | |||
| 4348 | svoboda | 71 | void pic_ack_interrupt(void *arg, inr_t intnum) |
| 1480 | palkovsky | 72 | { |
| 4341 | svoboda | 73 | if (pic) { |
| 74 | if (intnum < 32) |
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| 75 | pic[PIC_ACK_LOW] = 1 << intnum; |
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| 76 | else |
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| 77 | pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
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| 78 | } |
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| 1480 | palkovsky | 79 | } |
| 80 | |||
| 81 | /** Return number of pending interrupt */ |
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| 82 | int pic_get_pending(void) |
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| 83 | { |
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| 4341 | svoboda | 84 | if (pic) { |
| 85 | int pending; |
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| 86 | |||
| 87 | pending = pic[PIC_PENDING_LOW]; |
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| 88 | if (pending) |
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| 89 | return fnzb32(pending); |
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| 90 | |||
| 91 | pending = pic[PIC_PENDING_HIGH]; |
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| 92 | if (pending) |
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| 93 | return fnzb32(pending) + 32; |
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| 94 | } |
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| 1928 | decky | 95 | |
| 1480 | palkovsky | 96 | return -1; |
| 97 | } |
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| 1702 | cejka | 98 | |
| 1888 | jermar | 99 | /** @} |
| 1702 | cejka | 100 | */ |