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On Tue, Jun 17, 2014 at 3:57 PM, Alistair Francis
<alistair.fran...@xilinx.com> wrote:
> Add Stefan Hajnoczi as it relies on his work
> (http://lists.gnu.org/archive/html/qemu-devel/2014-05/msg06489.html)
>
> On Tue, Jun 17, 2014 at 2:18 PM, Alistair Francis
> <alistair.fran...@xilinx.com> wrote:
>> This patch adds the Cortex-A9 ARM CPU to the A9MPCore.
>>
>> The CPU is only created if the num-cpu property is set.
>>
>> This patch relies on Stefan Hajnoczi's v3 'virtio-blk:
>> use alias properties in transport devices' patch. This is
>> used to pass the CPU properties through to the mpcore.
>>
>> This patch allows the midr and reset-cbar properties to be set
>>
>> Signed-off-by: Alistair Francis <alistair.fran...@xilinx.com>
>> ---
>> V2: - Small fixes thanks to Peter Crosthwaite
>> - Properties are now passed through
>> - CPUs are no longer inited in the realize
>> function, instead it uses a property listening function
>> - Thanks to Maydell, Crosthwaite and Andreas
>> V1: First Release
>>
>> hw/cpu/a9mpcore.c | 62
>> ++++++++++++++++++++++++++++++++++++++++++++-
>> include/hw/cpu/a9mpcore.h | 3 ++
>> 2 files changed, 64 insertions(+), 1 deletions(-)
>>
>> diff --git a/hw/cpu/a9mpcore.c b/hw/cpu/a9mpcore.c
>> index c09358c..3d22b86 100644
>> --- a/hw/cpu/a9mpcore.c
>> +++ b/hw/cpu/a9mpcore.c
>> @@ -17,10 +17,54 @@ static void a9mp_priv_set_irq(void *opaque, int irq, int
>> level)
>> qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
>> }
>>
>> +static void a9mpcore_init_cpus(Object *obj, Visitor *v,
>> + void *opaque, const char *name,
>> + Error **errp)
>> +{
>> + A9MPPrivState *s = A9MPCORE_PRIV(obj);
>> + ObjectClass *cpu_oc;
>> + Error *err = NULL;
>> + int i;
>> + int64_t value;
>> +
>> + visit_type_int(v, &value, name, &err);
>> + if (err) {
>> + error_propagate(errp, err);
>> + return;
>> + }
>> + s->num_cpu = value;
>> +
>> + s->cpu = g_new0(ARMCPU, s->num_cpu);
>> + cpu_oc = cpu_class_by_name(TYPE_ARM_CPU, "cortex-a9");
>> +
>> + for (i = 0; i < s->num_cpu; i++) {
>> + object_initialize(&s->cpu[i], sizeof(*s->cpu),
>> + object_class_get_name(cpu_oc));
>> +
>> + object_property_add_alias(obj, "midr", OBJECT(&s->cpu[i]),
>> + "midr", NULL);
>> + object_property_add_alias(obj, "reset-cbar", OBJECT(&s->cpu[i]),
>> + "reset-cbar", NULL);
>> + /* This fails to pass through thte reset-cbar property
>> + * The qdev_alias_all_properties() also fails with multiple CPUs
>> + * Hence the code above is used instead
>> + * qdev_alias_all_properties(DEVICE(&s->cpu[i]), obj);
>> + */
>> + }
>> +}
>> +
>> static void a9mp_priv_initfn(Object *obj)
>> {
>> A9MPPrivState *s = A9MPCORE_PRIV(obj);
>>
>> + /* Set up the CPU to be initiated */
>> + object_property_add(obj, "num-cpu", "int",
>> + NULL, a9mpcore_init_cpus,
>> + NULL, NULL, NULL);
>> + /* Use this as the default */
>> + s->cpu = NULL;
>> + s->num_cpu = 1;
>> +
>> memory_region_init(&s->container, obj, "a9mp-priv-container", 0x2000);
>> sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->container);
>>
>> @@ -50,6 +94,17 @@ static void a9mp_priv_realize(DeviceState *dev, Error
>> **errp)
>> Error *err = NULL;
>> int i;
>>
>> + if (s->cpu) {
>> + for (i = 0; i < s->num_cpu; i++) {
>> + object_property_set_bool(OBJECT(&s->cpu[i]), true,
>> + "realized", &err);
>> + if (err) {
>> + error_propagate(errp, err);
>> + return;
>> + }
>> + }
>> + }
>> +
>> scudev = DEVICE(&s->scu);
>> qdev_prop_set_uint32(scudev, "num-cpu", s->num_cpu);
>> object_property_set_bool(OBJECT(&s->scu), true, "realized", &err);
>> @@ -75,6 +130,12 @@ static void a9mp_priv_realize(DeviceState *dev, Error
>> **errp)
>> /* Pass through inbound GPIO lines to the GIC */
>> qdev_init_gpio_in(dev, a9mp_priv_set_irq, s->num_irq - 32);
>>
>> + /* Connect the GIC to the first CPU */
>> + if (s->cpu) {
>> + sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
>> + qdev_get_gpio_in(DEVICE(s->cpu), ARM_CPU_IRQ));
>> + }
>> +
>> gtimerdev = DEVICE(&s->gtimer);
>> qdev_prop_set_uint32(gtimerdev, "num-cpu", s->num_cpu);
>> object_property_set_bool(OBJECT(&s->gtimer), true, "realized", &err);
>> @@ -144,7 +205,6 @@ static void a9mp_priv_realize(DeviceState *dev, Error
>> **errp)
>> }
>>
>> 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
>> diff --git a/include/hw/cpu/a9mpcore.h b/include/hw/cpu/a9mpcore.h
>> index 5d67ca2..2e57116 100644
>> --- a/include/hw/cpu/a9mpcore.h
>> +++ b/include/hw/cpu/a9mpcore.h
>> @@ -15,6 +15,7 @@
>> #include "hw/misc/a9scu.h"
>> #include "hw/timer/arm_mptimer.h"
>> #include "hw/timer/a9gtimer.h"
>> +#include "qapi/visitor.h"
>>
>> #define TYPE_A9MPCORE_PRIV "a9mpcore_priv"
>> #define A9MPCORE_PRIV(obj) \
>> @@ -29,6 +30,8 @@ typedef struct A9MPPrivState {
>> MemoryRegion container;
>> uint32_t num_irq;
>>
>> + ARMCPU *cpu;
>> +
>> A9SCUState scu;
>> GICState gic;
>> A9GTimerState gtimer;
>> --
>> 1.7.1
>>
