projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 5edb1b3f PM |
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 | #include "qemu/osdep.h" | |
| 27 | #include "hw/core/split-irq.h" | |
| 28 | #include "qapi/error.h" | |
| 29 | ||
| 30 | static void split_irq_handler(void *opaque, int n, int level) | |
| 31 | { | |
| 32 | SplitIRQ *s = SPLIT_IRQ(opaque); | |
| 33 | int i; | |
| 34 | ||
| 35 | for (i = 0; i < s->num_lines; i++) { | |
| 36 | qemu_set_irq(s->out_irq[i], level); | |
| 37 | } | |
| 38 | } | |
| 39 | ||
| 40 | static void split_irq_init(Object *obj) | |
| 41 | { | |
| 42 | qdev_init_gpio_in(DEVICE(obj), split_irq_handler, 1); | |
| 43 | } | |
| 44 | ||
| 45 | static void split_irq_realize(DeviceState *dev, Error **errp) | |
| 46 | { | |
| 47 | SplitIRQ *s = SPLIT_IRQ(dev); | |
| 48 | ||
| 49 | if (s->num_lines < 1 || s->num_lines >= MAX_SPLIT_LINES) { | |
| 50 | error_setg(errp, | |
| 51 | "IRQ splitter number of lines %d is not between 1 and %d", | |
| 52 | s->num_lines, MAX_SPLIT_LINES); | |
| 53 | return; | |
| 54 | } | |
| 55 | ||
| 56 | qdev_init_gpio_out(dev, s->out_irq, s->num_lines); | |
| 57 | } | |
| 58 | ||
| 59 | static Property split_irq_properties[] = { | |
| 60 | DEFINE_PROP_UINT16("num-lines", SplitIRQ, num_lines, 1), | |
| 61 | DEFINE_PROP_END_OF_LIST(), | |
| 62 | }; | |
| 63 | ||
| 64 | static void split_irq_class_init(ObjectClass *klass, void *data) | |
| 65 | { | |
| 66 | DeviceClass *dc = DEVICE_CLASS(klass); | |
| 67 | ||
| 68 | /* No state to reset or migrate */ | |
| 69 | dc->props = split_irq_properties; | |
| 70 | dc->realize = split_irq_realize; | |
| 71 | ||
| 72 | /* Reason: Needs to be wired up to work */ | |
| 73 | dc->user_creatable = false; | |
| 74 | } | |
| 75 | ||
| 76 | static const TypeInfo split_irq_type_info = { | |
| 77 | .name = TYPE_SPLIT_IRQ, | |
| 78 | .parent = TYPE_DEVICE, | |
| 79 | .instance_size = sizeof(SplitIRQ), | |
| 80 | .instance_init = split_irq_init, | |
| 81 | .class_init = split_irq_class_init, | |
| 82 | }; | |
| 83 | ||
| 84 | static void split_irq_register_types(void) | |
| 85 | { | |
| 86 | type_register_static(&split_irq_type_info); | |
| 87 | } | |
| 88 | ||
| 89 | type_init(split_irq_register_types) |