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/*
* Coherent Processing System emulation.
*
* Copyright (c) 2016 Imagination Technologies
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/mips/cps.h"
#include "hw/mips/mips.h"
#include "hw/mips/cpudevs.h"
#include "sysemu/kvm.h"
qemu_irq get_cps_irq(MIPSCPSState *s, int pin_number)
{
MIPSCPU *cpu = MIPS_CPU(first_cpu);
CPUMIPSState *env = &cpu->env;
assert(pin_number < s->num_irq);
/* TODO: return GIC pins once implemented */
return env->irq[pin_number];
}
static void mips_cps_init(Object *obj)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
MIPSCPSState *s = MIPS_CPS(obj);
/* Cover entire address space as there do not seem to be any
* constraints for the base address of CPC and GIC. */
memory_region_init(&s->container, obj, "mips-cps-container", UINT64_MAX);
sysbus_init_mmio(sbd, &s->container);
}
static void main_cpu_reset(void *opaque)
{
MIPSCPU *cpu = opaque;
CPUState *cs = CPU(cpu);
cpu_reset(cs);
/* All VPs are halted on reset. Leave powering up to CPC. */
cs->halted = 1;
}
static bool cpu_mips_itu_supported(CPUMIPSState *env)
{
bool is_mt = (env->CP0_Config5 & (1 << CP0C5_VP)) ||
(env->CP0_Config3 & (1 << CP0C3_MT));
return is_mt && !kvm_enabled();
}
static void mips_cps_realize(DeviceState *dev, Error **errp)
{
MIPSCPSState *s = MIPS_CPS(dev);
CPUMIPSState *env;
MIPSCPU *cpu;
int i;
Error *err = NULL;
target_ulong gcr_base;
bool itu_present = false;
for (i = 0; i < s->num_vp; i++) {
cpu = cpu_mips_init(s->cpu_model);
if (cpu == NULL) {
error_setg(errp, "%s: CPU initialization failed\n", __func__);
return;
}
env = &cpu->env;
/* Init internal devices */
cpu_mips_irq_init_cpu(env);
cpu_mips_clock_init(env);
if (cpu_mips_itu_supported(env)) {
itu_present = true;
/* Attach ITC Tag to the VP */
env->itc_tag = mips_itu_get_tag_region(&s->itu);
}
qemu_register_reset(main_cpu_reset, cpu);
}
cpu = MIPS_CPU(first_cpu);
env = &cpu->env;
/* Inter-Thread Communication Unit */
if (itu_present) {
object_initialize(&s->itu, sizeof(s->itu), TYPE_MIPS_ITU);
qdev_set_parent_bus(DEVICE(&s->itu), sysbus_get_default());
object_property_set_int(OBJECT(&s->itu), 16, "num-fifo", &err);
object_property_set_int(OBJECT(&s->itu), 16, "num-semaphores", &err);
object_property_set_bool(OBJECT(&s->itu), true, "realized", &err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(&s->container, 0,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->itu), 0));
}
/* Cluster Power Controller */
object_initialize(&s->cpc, sizeof(s->cpc), TYPE_MIPS_CPC);
qdev_set_parent_bus(DEVICE(&s->cpc), sysbus_get_default());
object_property_set_int(OBJECT(&s->cpc), s->num_vp, "num-vp", &err);
object_property_set_int(OBJECT(&s->cpc), 1, "vp-start-running", &err);
object_property_set_bool(OBJECT(&s->cpc), true, "realized", &err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(&s->container, 0,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->cpc), 0));
/* Global Configuration Registers */
gcr_base = env->CP0_CMGCRBase << 4;
object_initialize(&s->gcr, sizeof(s->gcr), TYPE_MIPS_GCR);
qdev_set_parent_bus(DEVICE(&s->gcr), sysbus_get_default());
object_property_set_int(OBJECT(&s->gcr), s->num_vp, "num-vp", &err);
object_property_set_int(OBJECT(&s->gcr), 0x800, "gcr-rev", &err);
object_property_set_int(OBJECT(&s->gcr), gcr_base, "gcr-base", &err);
object_property_set_link(OBJECT(&s->gcr), OBJECT(&s->cpc.mr), "cpc", &err);
object_property_set_bool(OBJECT(&s->gcr), true, "realized", &err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(&s->container, gcr_base,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gcr), 0));
}
static Property mips_cps_properties[] = {
DEFINE_PROP_UINT32("num-vp", MIPSCPSState, num_vp, 1),
DEFINE_PROP_UINT32("num-irq", MIPSCPSState, num_irq, 8),
DEFINE_PROP_STRING("cpu-model", MIPSCPSState, cpu_model),
DEFINE_PROP_END_OF_LIST()
};
static void mips_cps_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = mips_cps_realize;
dc->props = mips_cps_properties;
}
static const TypeInfo mips_cps_info = {
.name = TYPE_MIPS_CPS,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(MIPSCPSState),
.instance_init = mips_cps_init,
.class_init = mips_cps_class_init,
};
static void mips_cps_register_types(void)
{
type_register_static(&mips_cps_info);
}
type_init(mips_cps_register_types)
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