at91_intor.c
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/*
* AT91 Interrupt Logic OR
*
* Copyright (c) 2009 Filip Navara
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "sysbus.h"
typedef struct IntOrState {
SysBusDevice busdev;
qemu_irq parent_irq;
uint32_t sources;
} IntOrState;
static void at91_intor_set_irq(void *opaque, int irq, int level)
{
IntOrState *s = opaque;
if (level) {
s->sources |= 1 << irq;
} else {
s->sources &= ~(1 << irq);
}
qemu_set_irq(s->parent_irq, !!s->sources);
}
static void at91_intor_save(QEMUFile *f, void *opaque)
{
IntOrState *s = opaque;
qemu_put_be32(f, s->sources);
}
static int at91_intor_load(QEMUFile *f, void *opaque, int version_id)
{
IntOrState *s = opaque;
if (version_id != 1)
return -EINVAL;
s->sources = qemu_get_be32(f);
return 0;
}
static void at91_intor_reset(void *opaque)
{
IntOrState *s = opaque;
s->sources = 0;
}
static void at91_intor_init(SysBusDevice *dev)
{
IntOrState *s = FROM_SYSBUS(typeof (*s), dev);
qdev_init_gpio_in(&dev->qdev, at91_intor_set_irq, 32);
sysbus_init_irq(dev, &s->parent_irq);
qemu_register_reset(at91_intor_reset, s);
register_savevm("at91_intor", -1, 1, at91_intor_save, at91_intor_load, s);
}
static void at91_intor_register(void)
{
sysbus_register_dev("at91,intor", sizeof(IntOrState), at91_intor_init);
}
device_init(at91_intor_register)