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/*
* Samsung exynos4210 GIC implementation. Based on hw/arm_gic.c
*
* Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
* All rights reserved.
*
* Evgeny Voevodin <e.voevodin@samsung.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "hw/irq.h"
#include "hw/qdev-properties.h"
#include "hw/intc/exynos4210_gic.h"
#include "hw/arm/exynos4210.h"
#include "qom/object.h"
#define EXYNOS4210_GIC_NIRQ 160
#define EXYNOS4210_EXT_GIC_CPU_REGION_SIZE 0x10000
#define EXYNOS4210_EXT_GIC_DIST_REGION_SIZE 0x10000
#define EXYNOS4210_EXT_GIC_PER_CPU_OFFSET 0x8000
#define EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(n) \
((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET)
#define EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(n) \
((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET)
#define EXYNOS4210_GIC_CPU_REGION_SIZE 0x100
#define EXYNOS4210_GIC_DIST_REGION_SIZE 0x1000
static void exynos4210_gic_set_irq(void *opaque, int irq, int level)
{
Exynos4210GicState *s = (Exynos4210GicState *)opaque;
qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
}
static void exynos4210_gic_realize(DeviceState *dev, Error **errp)
{
Object *obj = OBJECT(dev);
Exynos4210GicState *s = EXYNOS4210_GIC(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
SysBusDevice *gicbusdev;
uint32_t n = s->num_cpu;
uint32_t i;
s->gic = qdev_new("arm_gic");
qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
qdev_prop_set_uint32(s->gic, "num-irq", EXYNOS4210_GIC_NIRQ);
gicbusdev = SYS_BUS_DEVICE(s->gic);
sysbus_realize_and_unref(gicbusdev, &error_fatal);
/* Pass through outbound IRQ lines from the GIC */
sysbus_pass_irq(sbd, gicbusdev);
/* Pass through inbound GPIO lines to the GIC */
qdev_init_gpio_in(dev, exynos4210_gic_set_irq,
EXYNOS4210_GIC_NIRQ - 32);
memory_region_init(&s->cpu_container, obj, "exynos4210-cpu-container",
EXYNOS4210_EXT_GIC_CPU_REGION_SIZE);
memory_region_init(&s->dist_container, obj, "exynos4210-dist-container",
EXYNOS4210_EXT_GIC_DIST_REGION_SIZE);
/*
* This clues in gcc that our on-stack buffers do, in fact have
* enough room for the cpu numbers. gcc 9.2.1 on 32-bit x86
* doesn't figure this out, otherwise and gives spurious warnings.
*/
assert(n <= EXYNOS4210_GIC_NCPUS);
for (i = 0; i < n; i++) {
g_autofree char *cpu_alias_name = g_strdup_printf("exynos4210-gic-alias_cpu%u", i);
g_autofree char *dist_alias_name = g_strdup_printf("exynos4210-gic-alias_dist%u", i);
/* Map CPU interface per SMP Core */
memory_region_init_alias(&s->cpu_alias[i], obj,
cpu_alias_name,
sysbus_mmio_get_region(gicbusdev, 1),
0,
EXYNOS4210_GIC_CPU_REGION_SIZE);
memory_region_add_subregion(&s->cpu_container,
EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(i), &s->cpu_alias[i]);
/* Map Distributor per SMP Core */
memory_region_init_alias(&s->dist_alias[i], obj,
dist_alias_name,
sysbus_mmio_get_region(gicbusdev, 0),
0,
EXYNOS4210_GIC_DIST_REGION_SIZE);
memory_region_add_subregion(&s->dist_container,
EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(i), &s->dist_alias[i]);
}
sysbus_init_mmio(sbd, &s->cpu_container);
sysbus_init_mmio(sbd, &s->dist_container);
}
static const Property exynos4210_gic_properties[] = {
DEFINE_PROP_UINT32("num-cpu", Exynos4210GicState, num_cpu, 1),
};
static void exynos4210_gic_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
device_class_set_props(dc, exynos4210_gic_properties);
dc->realize = exynos4210_gic_realize;
}
static const TypeInfo exynos4210_gic_info = {
.name = TYPE_EXYNOS4210_GIC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(Exynos4210GicState),
.class_init = exynos4210_gic_class_init,
};
static void exynos4210_gic_register_types(void)
{
type_register_static(&exynos4210_gic_info);
}
type_init(exynos4210_gic_register_types)
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