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/*
* Cortex-A9MPCore internal peripheral emulation.
*
* Copyright (c) 2009 CodeSourcery.
* Copyright (c) 2011 Linaro Limited.
* Written by Paul Brook, Peter Maydell.
*
* This code is licensed under the GPL.
*/
#include "hw/sysbus.h"
#include "hw/intc/arm_gic.h"
#include "hw/misc/a9scu.h"
#define TYPE_A9MPCORE_PRIV "a9mpcore_priv"
#define A9MPCORE_PRIV(obj) \
OBJECT_CHECK(A9MPPrivState, (obj), TYPE_A9MPCORE_PRIV)
typedef struct A9MPPrivState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
uint32_t num_cpu;
MemoryRegion container;
DeviceState *mptimer;
DeviceState *wdt;
uint32_t num_irq;
GICState gic;
A9SCUState scu;
} A9MPPrivState;
static void a9mp_priv_set_irq(void *opaque, int irq, int level)
{
A9MPPrivState *s = (A9MPPrivState *)opaque;
qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
}
static void a9mp_priv_initfn(Object *obj)
{
A9MPPrivState *s = A9MPCORE_PRIV(obj);
memory_region_init(&s->container, obj, "a9mp-priv-container", 0x2000);
sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->container);
object_initialize(&s->gic, sizeof(s->gic), TYPE_ARM_GIC);
qdev_set_parent_bus(DEVICE(&s->gic), sysbus_get_default());
object_initialize(&s->scu, sizeof(s->scu), TYPE_A9_SCU);
qdev_set_parent_bus(DEVICE(&s->scu), sysbus_get_default());
}
static int a9mp_priv_init(SysBusDevice *dev)
{
A9MPPrivState *s = A9MPCORE_PRIV(dev);
DeviceState *gicdev, *scudev;
SysBusDevice *timerbusdev, *wdtbusdev, *gicbusdev, *scubusdev;
int i;
gicdev = DEVICE(&s->gic);
qdev_prop_set_uint32(gicdev, "num-cpu", s->num_cpu);
qdev_prop_set_uint32(gicdev, "num-irq", s->num_irq);
qdev_init_nofail(gicdev);
gicbusdev = SYS_BUS_DEVICE(&s->gic);
/* Pass through outbound IRQ lines from the GIC */
sysbus_pass_irq(dev, gicbusdev);
/* Pass through inbound GPIO lines to the GIC */
qdev_init_gpio_in(DEVICE(dev), a9mp_priv_set_irq, s->num_irq - 32);
scudev = DEVICE(&s->scu);
qdev_prop_set_uint32(scudev, "num-cpu", s->num_cpu);
qdev_init_nofail(scudev);
scubusdev = SYS_BUS_DEVICE(&s->scu);
s->mptimer = qdev_create(NULL, "arm_mptimer");
qdev_prop_set_uint32(s->mptimer, "num-cpu", s->num_cpu);
qdev_init_nofail(s->mptimer);
timerbusdev = SYS_BUS_DEVICE(s->mptimer);
s->wdt = qdev_create(NULL, "arm_mptimer");
qdev_prop_set_uint32(s->wdt, "num-cpu", s->num_cpu);
qdev_init_nofail(s->wdt);
wdtbusdev = SYS_BUS_DEVICE(s->wdt);
/* Memory map (addresses are offsets from PERIPHBASE):
* 0x0000-0x00ff -- Snoop Control Unit
* 0x0100-0x01ff -- GIC CPU interface
* 0x0200-0x02ff -- Global Timer
* 0x0300-0x05ff -- nothing
* 0x0600-0x06ff -- private timers and watchdogs
* 0x0700-0x0fff -- nothing
* 0x1000-0x1fff -- GIC Distributor
*
* We should implement the global timer but don't currently do so.
*/
memory_region_add_subregion(&s->container, 0,
sysbus_mmio_get_region(scubusdev, 0));
/* GIC CPU interface */
memory_region_add_subregion(&s->container, 0x100,
sysbus_mmio_get_region(gicbusdev, 1));
/* Note that the A9 exposes only the "timer/watchdog for this core"
* memory region, not the "timer/watchdog for core X" ones 11MPcore has.
*/
memory_region_add_subregion(&s->container, 0x600,
sysbus_mmio_get_region(timerbusdev, 0));
memory_region_add_subregion(&s->container, 0x620,
sysbus_mmio_get_region(wdtbusdev, 0));
memory_region_add_subregion(&s->container, 0x1000,
sysbus_mmio_get_region(gicbusdev, 0));
/* Wire up the interrupt from each watchdog and timer.
* For each core the timer is PPI 29 and the watchdog PPI 30.
*/
for (i = 0; i < s->num_cpu; i++) {
int ppibase = (s->num_irq - 32) + i * 32;
sysbus_connect_irq(timerbusdev, i,
qdev_get_gpio_in(gicdev, ppibase + 29));
sysbus_connect_irq(wdtbusdev, i,
qdev_get_gpio_in(gicdev, ppibase + 30));
}
return 0;
}
static Property a9mp_priv_properties[] = {
DEFINE_PROP_UINT32("num-cpu", A9MPPrivState, num_cpu, 1),
/* The Cortex-A9MP may have anything from 0 to 224 external interrupt
* IRQ lines (with another 32 internal). We default to 64+32, which
* is the number provided by the Cortex-A9MP test chip in the
* Realview PBX-A9 and Versatile Express A9 development boards.
* Other boards may differ and should set this property appropriately.
*/
DEFINE_PROP_UINT32("num-irq", A9MPPrivState, num_irq, 96),
DEFINE_PROP_END_OF_LIST(),
};
static void a9mp_priv_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = a9mp_priv_init;
dc->props = a9mp_priv_properties;
}
static const TypeInfo a9mp_priv_info = {
.name = TYPE_A9MPCORE_PRIV,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(A9MPPrivState),
.instance_init = a9mp_priv_initfn,
.class_init = a9mp_priv_class_init,
};
static void a9mp_register_types(void)
{
type_register_static(&a9mp_priv_info);
}
type_init(a9mp_register_types)
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