92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* QEMU Loongson 7A1000 msi interrupt controller.
|
|
*
|
|
* Copyright (C) 2021 Loongson Technology Corporation Limited
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "hw/sysbus.h"
|
|
#include "hw/irq.h"
|
|
#include "hw/intc/loongarch_pch_msi.h"
|
|
#include "hw/intc/loongarch_pch_pic.h"
|
|
#include "hw/pci/msi.h"
|
|
#include "hw/misc/unimp.h"
|
|
#include "migration/vmstate.h"
|
|
#include "trace.h"
|
|
|
|
static uint64_t loongarch_msi_mem_read(void *opaque, hwaddr addr, unsigned size)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void loongarch_msi_mem_write(void *opaque, hwaddr addr,
|
|
uint64_t val, unsigned size)
|
|
{
|
|
LoongArchPCHMSI *s = (LoongArchPCHMSI *)opaque;
|
|
int irq_num;
|
|
|
|
/*
|
|
* vector number is irq number from upper extioi intc
|
|
* need subtract irq base to get msi vector offset
|
|
*/
|
|
irq_num = (val & 0xff) - s->irq_base;
|
|
trace_loongarch_msi_set_irq(irq_num);
|
|
assert(irq_num < PCH_MSI_IRQ_NUM);
|
|
qemu_set_irq(s->pch_msi_irq[irq_num], 1);
|
|
}
|
|
|
|
static const MemoryRegionOps loongarch_pch_msi_ops = {
|
|
.read = loongarch_msi_mem_read,
|
|
.write = loongarch_msi_mem_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static void pch_msi_irq_handler(void *opaque, int irq, int level)
|
|
{
|
|
LoongArchPCHMSI *s = LOONGARCH_PCH_MSI(opaque);
|
|
|
|
qemu_set_irq(s->pch_msi_irq[irq], level);
|
|
}
|
|
|
|
static void loongarch_pch_msi_init(Object *obj)
|
|
{
|
|
LoongArchPCHMSI *s = LOONGARCH_PCH_MSI(obj);
|
|
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
|
|
|
|
memory_region_init_io(&s->msi_mmio, obj, &loongarch_pch_msi_ops,
|
|
s, TYPE_LOONGARCH_PCH_MSI, 0x8);
|
|
sysbus_init_mmio(sbd, &s->msi_mmio);
|
|
msi_nonbroken = true;
|
|
|
|
qdev_init_gpio_out(DEVICE(obj), s->pch_msi_irq, PCH_MSI_IRQ_NUM);
|
|
qdev_init_gpio_in(DEVICE(obj), pch_msi_irq_handler, PCH_MSI_IRQ_NUM);
|
|
}
|
|
|
|
static Property loongarch_msi_properties[] = {
|
|
DEFINE_PROP_UINT32("msi_irq_base", LoongArchPCHMSI, irq_base, 0),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void loongarch_pch_msi_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
device_class_set_props(dc, loongarch_msi_properties);
|
|
}
|
|
|
|
static const TypeInfo loongarch_pch_msi_info = {
|
|
.name = TYPE_LOONGARCH_PCH_MSI,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(LoongArchPCHMSI),
|
|
.instance_init = loongarch_pch_msi_init,
|
|
.class_init = loongarch_pch_msi_class_init,
|
|
};
|
|
|
|
static void loongarch_pch_msi_register_types(void)
|
|
{
|
|
type_register_static(&loongarch_pch_msi_info);
|
|
}
|
|
|
|
type_init(loongarch_pch_msi_register_types)
|