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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* LoongArch IPI interrupt support
*
* Copyright (C) 2024 Loongson Technology Corporation Limited
*/
#include "qemu/osdep.h"
#include "hw/boards.h"
#include "qapi/error.h"
#include "hw/intc/loongarch_ipi.h"
#include "hw/qdev-properties.h"
#include "target/loongarch/cpu.h"
static AddressSpace *get_iocsr_as(CPUState *cpu)
{
return LOONGARCH_CPU(cpu)->env.address_space_iocsr;
}
static int archid_cmp(const void *a, const void *b)
{
CPUArchId *archid_a = (CPUArchId *)a;
CPUArchId *archid_b = (CPUArchId *)b;
return archid_a->arch_id - archid_b->arch_id;
}
static CPUArchId *find_cpu_by_archid(MachineState *ms, uint32_t id)
{
CPUArchId apic_id, *found_cpu;
apic_id.arch_id = id;
found_cpu = bsearch(&apic_id, ms->possible_cpus->cpus,
ms->possible_cpus->len,
sizeof(*ms->possible_cpus->cpus),
archid_cmp);
return found_cpu;
}
static CPUState *loongarch_cpu_by_arch_id(int64_t arch_id)
{
MachineState *machine = MACHINE(qdev_get_machine());
CPUArchId *archid;
archid = find_cpu_by_archid(machine, arch_id);
if (archid) {
return CPU(archid->cpu);
}
return NULL;
}
static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
{
LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(dev);
LoongarchIPIClass *lic = LOONGARCH_IPI_GET_CLASS(dev);
MachineState *machine = MACHINE(qdev_get_machine());
MachineClass *mc = MACHINE_GET_CLASS(machine);
const CPUArchIdList *id_list;
Error *local_err = NULL;
int i;
lic->parent_realize(dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
assert(mc->possible_cpu_arch_ids);
id_list = mc->possible_cpu_arch_ids(machine);
lics->num_cpu = id_list->len;
lics->cpu = g_new0(IPICore, lics->num_cpu);
for (i = 0; i < lics->num_cpu; i++) {
lics->cpu[i].arch_id = id_list->cpus[i].arch_id;
lics->cpu[i].cpu = CPU(id_list->cpus[i].cpu);
lics->cpu[i].ipi = lics;
qdev_init_gpio_out(dev, &lics->cpu[i].irq, 1);
}
}
static const Property loongarch_ipi_properties[] = {
DEFINE_PROP_UINT32("num-cpu", LoongsonIPICommonState, num_cpu, 1),
};
static void loongarch_ipi_class_init(ObjectClass *klass, void *data)
{
LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass);
LoongarchIPIClass *lic = LOONGARCH_IPI_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
device_class_set_parent_realize(dc, loongarch_ipi_realize,
&lic->parent_realize);
device_class_set_props(dc, loongarch_ipi_properties);
licc->get_iocsr_as = get_iocsr_as;
licc->cpu_by_arch_id = loongarch_cpu_by_arch_id;
}
static const TypeInfo loongarch_ipi_types[] = {
{
.name = TYPE_LOONGARCH_IPI,
.parent = TYPE_LOONGSON_IPI_COMMON,
.instance_size = sizeof(LoongarchIPIState),
.class_size = sizeof(LoongarchIPIClass),
.class_init = loongarch_ipi_class_init,
}
};
DEFINE_TYPES(loongarch_ipi_types)
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