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hw/intc/loongarch_extioi: Implment cpu hotplug interface

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When cpu is added, connect extioi gpio irq to CPU irq pin.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
This commit is contained in:
Bibo Mao 2025-01-10 16:38:42 +08:00
parent e45c96b7d6
commit 8e63a7a7c2
1 changed files with 45 additions and 0 deletions
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45
hw/intc/loongarch_extioi_common.c
View file

@ -12,28 +12,73 @@
#include "migration/vmstate.h"
#include "target/loongarch/cpu.h"
static ExtIOICore *loongarch_extioi_get_cpu(LoongArchExtIOICommonState *s,
DeviceState *dev)
{
CPUClass *k = CPU_GET_CLASS(dev);
uint64_t arch_id = k->get_arch_id(CPU(dev));
int i;
for (i = 0; i < s->num_cpu; i++) {
if (s->cpu[i].arch_id == arch_id) {
return &s->cpu[i];
}
}
return NULL;
}
static void loongarch_extioi_cpu_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
LoongArchExtIOICommonState *s = LOONGARCH_EXTIOI_COMMON(hotplug_dev);
Object *obj = OBJECT(dev);
ExtIOICore *core;
int pin, index;
if (!object_dynamic_cast(obj, TYPE_LOONGARCH_CPU)) {
warn_report("LoongArch extioi: Invalid %s device type",
object_get_typename(obj));
return;
}
core = loongarch_extioi_get_cpu(s, dev);
if (!core) {
return;
}
core->cpu = CPU(dev);
index = core - s->cpu;
/*
* connect extioi irq to the cpu irq
* cpu_pin[LS3A_INTC_IP + 2 : 2] <= intc_pin[LS3A_INTC_IP : 0]
*/
for (pin = 0; pin < LS3A_INTC_IP; pin++) {
qdev_connect_gpio_out(DEVICE(s), index * LS3A_INTC_IP + pin,
qdev_get_gpio_in(dev, pin + 2));
}
}
static void loongarch_extioi_cpu_unplug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
LoongArchExtIOICommonState *s = LOONGARCH_EXTIOI_COMMON(hotplug_dev);
Object *obj = OBJECT(dev);
ExtIOICore *core;
if (!object_dynamic_cast(obj, TYPE_LOONGARCH_CPU)) {
warn_report("LoongArch extioi: Invalid %s device type",
object_get_typename(obj));
return;
}
core = loongarch_extioi_get_cpu(s, dev);
if (!core) {
return;
}
core->cpu = NULL;
}
static void loongarch_extioi_common_realize(DeviceState *dev, Error **errp)