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hw/loongarch: Add platform bus support

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Add platform bus support and add the bus information such as address,
size, irq number to FDT table.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Acked-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20220908094623.73051-5-yangxiaojuan@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
This commit is contained in:
Xiaojuan Yang 2022-08-10 15:50:35 +08:00 committed by Song Gao
parent ee413a52c1
commit a1f7d78e56
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GPG Key ID: 40A2FFF239263EDF
4 changed files with 40 additions and 0 deletions
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1
hw/loongarch/Kconfig
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@ -8,6 +8,7 @@ config LOONGARCH_VIRT
select SERIAL
select SERIAL_ISA
select VIRTIO_PCI
select PLATFORM_BUS
select LOONGARCH_IPI
select LOONGARCH_PCH_PIC
select LOONGARCH_PCH_MSI

33
hw/loongarch/virt.c
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@ -37,6 +37,8 @@
#include "hw/mem/nvdimm.h"
#include "sysemu/device_tree.h"
#include <libfdt.h>
#include "hw/core/sysbus-fdt.h"
#include "hw/platform-bus.h"
static void create_fdt(LoongArchMachineState *lams)
{
@ -345,6 +347,31 @@ static DeviceState *create_acpi_ged(DeviceState *pch_pic, LoongArchMachineState
return dev;
}
static DeviceState *create_platform_bus(DeviceState *pch_pic)
{
DeviceState *dev;
SysBusDevice *sysbus;
int i, irq;
MemoryRegion *sysmem = get_system_memory();
dev = qdev_new(TYPE_PLATFORM_BUS_DEVICE);
dev->id = g_strdup(TYPE_PLATFORM_BUS_DEVICE);
qdev_prop_set_uint32(dev, "num_irqs", VIRT_PLATFORM_BUS_NUM_IRQS);
qdev_prop_set_uint32(dev, "mmio_size", VIRT_PLATFORM_BUS_SIZE);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
sysbus = SYS_BUS_DEVICE(dev);
for (i = 0; i < VIRT_PLATFORM_BUS_NUM_IRQS; i++) {
irq = VIRT_PLATFORM_BUS_IRQ - PCH_PIC_IRQ_OFFSET + i;
sysbus_connect_irq(sysbus, i, qdev_get_gpio_in(pch_pic, irq));
}
memory_region_add_subregion(sysmem,
VIRT_PLATFORM_BUS_BASEADDRESS,
sysbus_mmio_get_region(sysbus, 0));
return dev;
}
static void loongarch_devices_init(DeviceState *pch_pic, LoongArchMachineState *lams)
{
DeviceState *gpex_dev;
@ -420,6 +447,8 @@ static void loongarch_devices_init(DeviceState *pch_pic, LoongArchMachineState *
memory_region_add_subregion(get_system_memory(), PM_BASE, pm_mem);
/* acpi ged */
lams->acpi_ged = create_acpi_ged(pch_pic, lams);
/* platform bus */
lams->platform_bus_dev = create_platform_bus(pch_pic);
}
static void loongarch_irq_init(LoongArchMachineState *lams)
@ -725,6 +754,10 @@ static void loongarch_init(MachineState *machine)
/* Initialize the IO interrupt subsystem */
loongarch_irq_init(lams);
fdt_add_irqchip_node(lams);
platform_bus_add_all_fdt_nodes(machine->fdt, "/intc",
VIRT_PLATFORM_BUS_BASEADDRESS,
VIRT_PLATFORM_BUS_SIZE,
VIRT_PLATFORM_BUS_IRQ);
lams->machine_done.notify = virt_machine_done;
qemu_add_machine_init_done_notifier(&lams->machine_done);
fdt_add_pcie_node(lams);

1
include/hw/loongarch/virt.h
View File

@ -49,6 +49,7 @@ struct LoongArchMachineState {
char *oem_table_id;
DeviceState *acpi_ged;
int fdt_size;
DeviceState *platform_bus_dev;
};
#define TYPE_LOONGARCH_MACHINE MACHINE_TYPE_NAME("virt")

5
include/hw/pci-host/ls7a.h
View File

@ -42,4 +42,9 @@
#define VIRT_RTC_REG_BASE (VIRT_MISC_REG_BASE + 0x00050100)
#define VIRT_RTC_LEN 0x100
#define VIRT_SCI_IRQ (PCH_PIC_IRQ_OFFSET + 4)
#define VIRT_PLATFORM_BUS_BASEADDRESS 0x16000000
#define VIRT_PLATFORM_BUS_SIZE 0x2000000
#define VIRT_PLATFORM_BUS_NUM_IRQS 2
#define VIRT_PLATFORM_BUS_IRQ 69
#endif