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hw/a9mpcore: Switch to using sysbus GIC 

Switch the a9mpcore to using the sysbus GIC device rather
than having the a9mp private memory region device subclass
the GIC.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2012-04-13 11:39:08 +00:00
parent 4637a02752
commit ddd761653b
1 changed files with 35 additions and 25 deletions
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60
hw/a9mpcore.c
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@ -10,22 +10,19 @@
#include "sysbus.h"
#define LEGACY_INCLUDED_GIC
#include "arm_gic.c"
/* A9MP private memory region. */
typedef struct a9mp_priv_state {
gic_state gic;
SysBusDevice busdev;
uint32_t scu_control;
uint32_t scu_status;
uint32_t old_timer_status[8];
uint32_t num_cpu;
qemu_irq *timer_irq;
MemoryRegion scu_iomem;
MemoryRegion ptimer_iomem;
MemoryRegion container;
DeviceState *mptimer;
DeviceState *gic;
uint32_t num_irq;
} a9mp_priv_state;
@ -114,18 +111,9 @@ static const MemoryRegionOps a9_scu_ops = {
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void a9mpcore_timer_irq_handler(void *opaque, int irq, int level)
{
a9mp_priv_state *s = (a9mp_priv_state *)opaque;
if (level && !s->old_timer_status[irq]) {
gic_set_pending_private(&s->gic, irq >> 1, 29 + (irq & 1));
}
s->old_timer_status[irq] = level;
}
static void a9mp_priv_reset(DeviceState *dev)
{
a9mp_priv_state *s = FROM_SYSBUSGIC(a9mp_priv_state, sysbus_from_qdev(dev));
a9mp_priv_state *s = FROM_SYSBUS(a9mp_priv_state, sysbus_from_qdev(dev));
int i;
s->scu_control = 0;
for (i = 0; i < ARRAY_SIZE(s->old_timer_status); i++) {
@ -133,13 +121,29 @@ static void a9mp_priv_reset(DeviceState *dev)
}
}
static void a9mp_priv_set_irq(void *opaque, int irq, int level)
{
a9mp_priv_state *s = (a9mp_priv_state *)opaque;
qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
}
static int a9mp_priv_init(SysBusDevice *dev)
{
a9mp_priv_state *s = FROM_SYSBUSGIC(a9mp_priv_state, dev);
SysBusDevice *busdev;
a9mp_priv_state *s = FROM_SYSBUS(a9mp_priv_state, dev);
SysBusDevice *busdev, *gicbusdev;
int i;
gic_init(&s->gic, s->num_cpu, s->num_irq);
s->gic = qdev_create(NULL, "arm_gic");
qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
qdev_prop_set_uint32(s->gic, "num-irq", s->num_irq);
qdev_init_nofail(s->gic);
gicbusdev = sysbus_from_qdev(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(&s->busdev.qdev, a9mp_priv_set_irq, s->num_irq - 32);
s->mptimer = qdev_create(NULL, "arm_mptimer");
qdev_prop_set_uint32(s->mptimer, "num-cpu", s->num_cpu);
@ -161,7 +165,8 @@ static int a9mp_priv_init(SysBusDevice *dev)
memory_region_init_io(&s->scu_iomem, &a9_scu_ops, s, "a9mp-scu", 0x100);
memory_region_add_subregion(&s->container, 0, &s->scu_iomem);
/* GIC CPU interface */
memory_region_add_subregion(&s->container, 0x100, &s->gic.cpuiomem[0]);
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.
*/
@ -169,15 +174,20 @@ static int a9mp_priv_init(SysBusDevice *dev)
sysbus_mmio_get_region(busdev, 0));
memory_region_add_subregion(&s->container, 0x620,
sysbus_mmio_get_region(busdev, 1));
memory_region_add_subregion(&s->container, 0x1000, &s->gic.iomem);
memory_region_add_subregion(&s->container, 0x1000,
sysbus_mmio_get_region(gicbusdev, 0));
sysbus_init_mmio(dev, &s->container);
/* Wire up the interrupt from each watchdog and timer. */
s->timer_irq = qemu_allocate_irqs(a9mpcore_timer_irq_handler,
s, (s->num_cpu + 1) * 2);
for (i = 0; i < s->num_cpu * 2; i++) {
sysbus_connect_irq(busdev, i, s->timer_irq[i]);
/* 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(busdev, i * 2,
qdev_get_gpio_in(s->gic, ppibase + 29));
sysbus_connect_irq(busdev, i * 2 + 1,
qdev_get_gpio_in(s->gic, ppibase + 30));
}
return 0;
}