1 | /* |
2 | * IRQ splitter device. |
3 | * |
4 | * Copyright (c) 2018 Linaro Limited. |
5 | * Written by Peter Maydell |
6 | * |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
8 | * of this software and associated documentation files (the "Software"), to deal |
9 | * in the Software without restriction, including without limitation the rights |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
11 | * copies of the Software, and to permit persons to whom the Software is |
12 | * furnished to do so, subject to the following conditions: |
13 | * |
14 | * The above copyright notice and this permission notice shall be included in |
15 | * all copies or substantial portions of the Software. |
16 | * |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
23 | * THE SOFTWARE. |
24 | */ |
25 | |
26 | /* This is a simple device which has one GPIO input line and multiple |
27 | * GPIO output lines. Any change on the input line is forwarded to all |
28 | * of the outputs. |
29 | * |
30 | * QEMU interface: |
31 | * + one unnamed GPIO input: the input line |
32 | * + N unnamed GPIO outputs: the output lines |
33 | * + QOM property "num-lines": sets the number of output lines |
34 | */ |
35 | #ifndef HW_SPLIT_IRQ_H |
36 | #define HW_SPLIT_IRQ_H |
37 | |
38 | #include "hw/sysbus.h" |
39 | #include "qom/object.h" |
40 | |
41 | #define TYPE_SPLIT_IRQ "split-irq" |
42 | |
43 | #define MAX_SPLIT_LINES 16 |
44 | |
45 | typedef struct SplitIRQ SplitIRQ; |
46 | |
47 | #define SPLIT_IRQ(obj) OBJECT_CHECK(SplitIRQ, (obj), TYPE_SPLIT_IRQ) |
48 | |
49 | struct SplitIRQ { |
50 | DeviceState parent_obj; |
51 | |
52 | qemu_irq out_irq[MAX_SPLIT_LINES]; |
53 | uint16_t num_lines; |
54 | }; |
55 | |
56 | #endif |
57 | |