111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* QEMU IRQ/GPIO common code.
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*
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* Copyright (c) 2016 Alistair Francis <alistair@alistair23.me>.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "hw/or-irq.h"
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static void or_irq_handler(void *opaque, int n, int level)
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{
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qemu_or_irq *s = OR_IRQ(opaque);
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int or_level = 0;
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int i;
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s->levels[n] = level;
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for (i = 0; i < s->num_lines; i++) {
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or_level |= s->levels[i];
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}
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qemu_set_irq(s->out_irq, or_level);
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}
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static void or_irq_reset(DeviceState *dev)
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{
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qemu_or_irq *s = OR_IRQ(dev);
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int i;
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for (i = 0; i < MAX_OR_LINES; i++) {
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s->levels[i] = false;
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}
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}
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static void or_irq_realize(DeviceState *dev, Error **errp)
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{
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qemu_or_irq *s = OR_IRQ(dev);
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assert(s->num_lines < MAX_OR_LINES);
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qdev_init_gpio_in(dev, or_irq_handler, s->num_lines);
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}
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static void or_irq_init(Object *obj)
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{
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qemu_or_irq *s = OR_IRQ(obj);
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qdev_init_gpio_out(DEVICE(obj), &s->out_irq, 1);
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}
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static const VMStateDescription vmstate_or_irq = {
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.name = TYPE_OR_IRQ,
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_BOOL_ARRAY(levels, qemu_or_irq, MAX_OR_LINES),
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VMSTATE_END_OF_LIST(),
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}
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};
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static Property or_irq_properties[] = {
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DEFINE_PROP_UINT16("num-lines", qemu_or_irq, num_lines, 1),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void or_irq_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->reset = or_irq_reset;
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dc->props = or_irq_properties;
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dc->realize = or_irq_realize;
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dc->vmsd = &vmstate_or_irq;
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/* Reason: Needs to be wired up to work, e.g. see stm32f205_soc.c */
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dc->user_creatable = false;
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}
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static const TypeInfo or_irq_type_info = {
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.name = TYPE_OR_IRQ,
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.parent = TYPE_DEVICE,
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.instance_size = sizeof(qemu_or_irq),
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.instance_init = or_irq_init,
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.class_init = or_irq_class_init,
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};
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static void or_irq_register_types(void)
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{
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type_register_static(&or_irq_type_info);
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}
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type_init(or_irq_register_types)
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