Don't handle object_property_get_link() failure that can't happen unless the programmer screwed up, pass &error_abort. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200707160613.848843-25-armbru@redhat.com>
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
|
|
* QEMU Altera Internal Interrupt Controller.
|
|
*
|
|
* Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see
|
|
* <http://www.gnu.org/licenses/lgpl-2.1.html>
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/module.h"
|
|
#include "qapi/error.h"
|
|
|
|
#include "hw/irq.h"
|
|
#include "hw/sysbus.h"
|
|
#include "cpu.h"
|
|
|
|
#define TYPE_ALTERA_IIC "altera,iic"
|
|
#define ALTERA_IIC(obj) \
|
|
OBJECT_CHECK(AlteraIIC, (obj), TYPE_ALTERA_IIC)
|
|
|
|
typedef struct AlteraIIC {
|
|
SysBusDevice parent_obj;
|
|
void *cpu;
|
|
qemu_irq parent_irq;
|
|
} AlteraIIC;
|
|
|
|
static void update_irq(AlteraIIC *pv)
|
|
{
|
|
CPUNios2State *env = &((Nios2CPU *)(pv->cpu))->env;
|
|
|
|
qemu_set_irq(pv->parent_irq,
|
|
env->regs[CR_IPENDING] & env->regs[CR_IENABLE]);
|
|
}
|
|
|
|
static void irq_handler(void *opaque, int irq, int level)
|
|
{
|
|
AlteraIIC *pv = opaque;
|
|
CPUNios2State *env = &((Nios2CPU *)(pv->cpu))->env;
|
|
|
|
env->regs[CR_IPENDING] &= ~(1 << irq);
|
|
env->regs[CR_IPENDING] |= !!level << irq;
|
|
|
|
update_irq(pv);
|
|
}
|
|
|
|
static void altera_iic_init(Object *obj)
|
|
{
|
|
AlteraIIC *pv = ALTERA_IIC(obj);
|
|
|
|
qdev_init_gpio_in(DEVICE(pv), irq_handler, 32);
|
|
sysbus_init_irq(SYS_BUS_DEVICE(obj), &pv->parent_irq);
|
|
}
|
|
|
|
static void altera_iic_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
struct AlteraIIC *pv = ALTERA_IIC(dev);
|
|
|
|
pv->cpu = object_property_get_link(OBJECT(dev), "cpu", &error_abort);
|
|
}
|
|
|
|
static void altera_iic_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
/* Reason: needs to be wired up, e.g. by nios2_10m50_ghrd_init() */
|
|
dc->user_creatable = false;
|
|
dc->realize = altera_iic_realize;
|
|
}
|
|
|
|
static TypeInfo altera_iic_info = {
|
|
.name = "altera,iic",
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(AlteraIIC),
|
|
.instance_init = altera_iic_init,
|
|
.class_init = altera_iic_class_init,
|
|
};
|
|
|
|
static void altera_iic_register(void)
|
|
{
|
|
type_register_static(&altera_iic_info);
|
|
}
|
|
|
|
type_init(altera_iic_register)
|