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/*
* Raspberry Pi emulation (c) 2012 Gregory Estrade
* Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous
*
* Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft
* Written by Andrew Baumann
*
* This code is licensed under the GNU GPLv2 and later.
*/
#include "hw/arm/bcm2836.h"
#include "hw/arm/raspi_platform.h"
#include "hw/sysbus.h"
#include "exec/address-spaces.h"
/* Peripheral base address seen by the CPU */
#define BCM2836_PERI_BASE 0x3F000000
/* "QA7" (Pi2) interrupt controller and mailboxes etc. */
#define BCM2836_CONTROL_BASE 0x40000000
static void bcm2836_init(Object *obj)
{
BCM2836State *s = BCM2836(obj);
int n;
for (n = 0; n < BCM2836_NCPUS; n++) {
object_initialize(&s->cpus[n], sizeof(s->cpus[n]),
"cortex-a15-" TYPE_ARM_CPU);
object_property_add_child(obj, "cpu[*]", OBJECT(&s->cpus[n]),
&error_abort);
}
object_initialize(&s->control, sizeof(s->control), TYPE_BCM2836_CONTROL);
object_property_add_child(obj, "control", OBJECT(&s->control), NULL);
qdev_set_parent_bus(DEVICE(&s->control), sysbus_get_default());
object_initialize(&s->peripherals, sizeof(s->peripherals),
TYPE_BCM2835_PERIPHERALS);
object_property_add_child(obj, "peripherals", OBJECT(&s->peripherals),
&error_abort);
qdev_set_parent_bus(DEVICE(&s->peripherals), sysbus_get_default());
}
static void bcm2836_realize(DeviceState *dev, Error **errp)
{
BCM2836State *s = BCM2836(dev);
Object *obj;
Error *err = NULL;
int n;
/* common peripherals from bcm2835 */
obj = object_property_get_link(OBJECT(dev), "ram", &err);
if (obj == NULL) {
error_setg(errp, "%s: required ram link not found: %s",
__func__, error_get_pretty(err));
return;
}
object_property_add_const_link(OBJECT(&s->peripherals), "ram", obj, &err);
if (err) {
error_propagate(errp, err);
return;
}
object_property_set_bool(OBJECT(&s->peripherals), true, "realized", &err);
if (err) {
error_propagate(errp, err);
return;
}
sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->peripherals), 0,
BCM2836_PERI_BASE, 1);
/* bcm2836 interrupt controller (and mailboxes, etc.) */
object_property_set_bool(OBJECT(&s->control), true, "realized", &err);
if (err) {
error_propagate(errp, err);
return;
}
sysbus_mmio_map(SYS_BUS_DEVICE(&s->control), 0, BCM2836_CONTROL_BASE);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 0,
qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-irq", 0));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->peripherals), 1,
qdev_get_gpio_in_named(DEVICE(&s->control), "gpu-fiq", 0));
for (n = 0; n < BCM2836_NCPUS; n++) {
/* Mirror bcm2836, which has clusterid set to 0xf
* TODO: this should be converted to a property of ARM_CPU
*/
s->cpus[n].mp_affinity = 0xF00 | n;
/* set periphbase/CBAR value for CPU-local registers */
object_property_set_int(OBJECT(&s->cpus[n]),
BCM2836_PERI_BASE + MCORE_OFFSET,
"reset-cbar", &err);
if (err) {
error_propagate(errp, err);
return;
}
/* start powered off if not enabled */
object_property_set_bool(OBJECT(&s->cpus[n]), n >= s->enabled_cpus,
"start-powered-off", &err);
if (err) {
error_propagate(errp, err);
return;
}
object_property_set_bool(OBJECT(&s->cpus[n]), true, "realized", &err);
if (err) {
error_propagate(errp, err);
return;
}
/* Connect irq/fiq outputs from the interrupt controller. */
qdev_connect_gpio_out_named(DEVICE(&s->control), "irq", n,
qdev_get_gpio_in(DEVICE(&s->cpus[n]), ARM_CPU_IRQ));
qdev_connect_gpio_out_named(DEVICE(&s->control), "fiq", n,
qdev_get_gpio_in(DEVICE(&s->cpus[n]), ARM_CPU_FIQ));
/* Connect timers from the CPU to the interrupt controller */
qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_PHYS,
qdev_get_gpio_in_named(DEVICE(&s->control), "cntpsirq", n));
qdev_connect_gpio_out(DEVICE(&s->cpus[n]), GTIMER_VIRT,
qdev_get_gpio_in_named(DEVICE(&s->control), "cntvirq", n));
}
}
static Property bcm2836_props[] = {
DEFINE_PROP_UINT32("enabled-cpus", BCM2836State, enabled_cpus, BCM2836_NCPUS),
DEFINE_PROP_END_OF_LIST()
};
static void bcm2836_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->props = bcm2836_props;
dc->realize = bcm2836_realize;
/*
* Reason: creates an ARM CPU, thus use after free(), see
* arm_cpu_class_init()
*/
dc->cannot_destroy_with_object_finalize_yet = true;
}
static const TypeInfo bcm2836_type_info = {
.name = TYPE_BCM2836,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(BCM2836State),
.instance_init = bcm2836_init,
.class_init = bcm2836_class_init,
};
static void bcm2836_register_types(void)
{
type_register_static(&bcm2836_type_info);
}
type_init(bcm2836_register_types)
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