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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 |
29 | /** @addtogroup ppc32 |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | 35 | ||
36 | #include <arch/drivers/pic.h> |
36 | #include <arch/drivers/pic.h> |
37 | #include <mm/page.h> |
37 | #include <mm/page.h> |
38 | #include <byteorder.h> |
38 | #include <byteorder.h> |
39 | #include <bitops.h> |
39 | #include <bitops.h> |
40 | 40 | ||
41 | static volatile uint32_t *pic; |
41 | static volatile uint32_t *pic; |
42 | 42 | ||
43 | void pic_init(uintptr_t base, size_t size) |
43 | void pic_init(uintptr_t base, size_t size) |
44 | { |
44 | { |
45 | pic = (uint32_t *) hw_map(base, size); |
45 | pic = (uint32_t *) hw_map(base, size); |
46 | } |
46 | } |
47 | 47 | ||
48 | void pic_enable_interrupt(int intnum) |
48 | void pic_enable_interrupt(int intnum) |
49 | { |
49 | { |
50 | if (intnum < 32) { |
50 | if (intnum < 32) { |
51 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
51 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
52 | } else { |
52 | } else { |
53 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
53 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
54 | } |
54 | } |
55 | 55 | ||
56 | } |
56 | } |
57 | 57 | ||
58 | void pic_disable_interrupt(int intnum) |
58 | void pic_disable_interrupt(int intnum) |
59 | { |
59 | { |
60 | if (intnum < 32) { |
60 | if (intnum < 32) { |
61 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
61 | pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
62 | } else { |
62 | } else { |
63 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
63 | pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
64 | } |
64 | } |
65 | } |
65 | } |
66 | 66 | ||
67 | void pic_ack_interrupt(int intnum) |
67 | void pic_ack_interrupt(int intnum) |
68 | { |
68 | { |
69 | if (intnum < 32) |
69 | if (intnum < 32) |
70 | pic[PIC_ACK_LOW] = 1 << intnum; |
70 | pic[PIC_ACK_LOW] = 1 << intnum; |
71 | else |
71 | else |
72 | pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
72 | pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
73 | } |
73 | } |
74 | 74 | ||
75 | /** Return number of pending interrupt */ |
75 | /** Return number of pending interrupt */ |
76 | int pic_get_pending(void) |
76 | int pic_get_pending(void) |
77 | { |
77 | { |
78 | int pending; |
78 | int pending; |
79 | 79 | ||
80 | pending = pic[PIC_PENDING_LOW]; |
80 | pending = pic[PIC_PENDING_LOW]; |
81 | if (pending) |
81 | if (pending) |
82 | return fnzb32(pending); |
82 | return fnzb32(pending); |
83 | 83 | ||
84 | pending = pic[PIC_PENDING_HIGH]; |
84 | pending = pic[PIC_PENDING_HIGH]; |
85 | if (pending) |
85 | if (pending) |
86 | return fnzb32(pending) + 32; |
86 | return fnzb32(pending) + 32; |
87 | 87 | ||
88 | return -1; |
88 | return -1; |
89 | } |
89 | } |
90 | 90 | ||
91 | /** @} |
91 | /** @} |
92 | */ |
92 | */ |
93 | 93 |