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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* QEMU loongson 3a5000 develop board emulation
*
* Copyright (c) 2021 Loongson Technology Corporation Limited
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu/datadir.h"
#include "qapi/error.h"
#include "hw/boards.h"
#include "sysemu/sysemu.h"
#include "sysemu/qtest.h"
#include "sysemu/runstate.h"
#include "sysemu/reset.h"
#include "sysemu/rtc.h"
#include "hw/loongarch/virt.h"
#include "exec/address-spaces.h"
#include "hw/intc/loongarch_ipi.h"
#include "hw/intc/loongarch_extioi.h"
#include "hw/intc/loongarch_pch_pic.h"
#include "hw/intc/loongarch_pch_msi.h"
#include "hw/pci-host/ls7a.h"
#include "target/loongarch/cpu.h"
static void loongarch_irq_init(LoongArchMachineState *lams)
{
MachineState *ms = MACHINE(lams);
DeviceState *pch_pic, *pch_msi, *cpudev;
DeviceState *ipi, *extioi;
SysBusDevice *d;
LoongArchCPU *lacpu;
CPULoongArchState *env;
CPUState *cpu_state;
int cpu, pin, i;
ipi = qdev_new(TYPE_LOONGARCH_IPI);
sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
extioi = qdev_new(TYPE_LOONGARCH_EXTIOI);
sysbus_realize_and_unref(SYS_BUS_DEVICE(extioi), &error_fatal);
/*
* The connection of interrupts:
* +-----+ +---------+ +-------+
* | IPI |--> | CPUINTC | <-- | Timer |
* +-----+ +---------+ +-------+
* ^
* |
* +---------+
* | EIOINTC |
* +---------+
* ^ ^
* | |
* +---------+ +---------+
* | PCH-PIC | | PCH-MSI |
* +---------+ +---------+
* ^ ^ ^
* | | |
* +--------+ +---------+ +---------+
* | UARTs | | Devices | | Devices |
* +--------+ +---------+ +---------+
*/
for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
cpu_state = qemu_get_cpu(cpu);
cpudev = DEVICE(cpu_state);
lacpu = LOONGARCH_CPU(cpu_state);
env = &(lacpu->env);
/* connect ipi irq to cpu irq */
qdev_connect_gpio_out(ipi, cpu, qdev_get_gpio_in(cpudev, IRQ_IPI));
/* IPI iocsr memory region */
memory_region_add_subregion(&env->system_iocsr, SMP_IPI_MAILBOX,
sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi),
cpu));
/* extioi iocsr memory region */
memory_region_add_subregion(&env->system_iocsr, APIC_BASE,
sysbus_mmio_get_region(SYS_BUS_DEVICE(extioi),
cpu));
}
/*
* connect ext irq to the cpu irq
* cpu_pin[9:2] <= intc_pin[7:0]
*/
for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
cpudev = DEVICE(qemu_get_cpu(cpu));
for (pin = 0; pin < LS3A_INTC_IP; pin++) {
qdev_connect_gpio_out(extioi, (cpu * 8 + pin),
qdev_get_gpio_in(cpudev, pin + 2));
}
}
pch_pic = qdev_new(TYPE_LOONGARCH_PCH_PIC);
d = SYS_BUS_DEVICE(pch_pic);
sysbus_realize_and_unref(d, &error_fatal);
memory_region_add_subregion(get_system_memory(), LS7A_IOAPIC_REG_BASE,
sysbus_mmio_get_region(d, 0));
memory_region_add_subregion(get_system_memory(),
LS7A_IOAPIC_REG_BASE + PCH_PIC_ROUTE_ENTRY_OFFSET,
sysbus_mmio_get_region(d, 1));
memory_region_add_subregion(get_system_memory(),
LS7A_IOAPIC_REG_BASE + PCH_PIC_INT_STATUS_LO,
sysbus_mmio_get_region(d, 2));
/* Connect 64 pch_pic irqs to extioi */
for (int i = 0; i < PCH_PIC_IRQ_NUM; i++) {
qdev_connect_gpio_out(DEVICE(d), i, qdev_get_gpio_in(extioi, i));
}
pch_msi = qdev_new(TYPE_LOONGARCH_PCH_MSI);
d = SYS_BUS_DEVICE(pch_msi);
sysbus_realize_and_unref(d, &error_fatal);
sysbus_mmio_map(d, 0, LS7A_PCH_MSI_ADDR_LOW);
for (i = 0; i < PCH_MSI_IRQ_NUM; i++) {
/* Connect 192 pch_msi irqs to extioi */
qdev_connect_gpio_out(DEVICE(d), i,
qdev_get_gpio_in(extioi, i + PCH_MSI_IRQ_START));
}
}
static void loongarch_init(MachineState *machine)
{
const char *cpu_model = machine->cpu_type;
ram_addr_t offset = 0;
ram_addr_t ram_size = machine->ram_size;
uint64_t highram_size = 0;
MemoryRegion *address_space_mem = get_system_memory();
LoongArchMachineState *lams = LOONGARCH_MACHINE(machine);
int i;
if (!cpu_model) {
cpu_model = LOONGARCH_CPU_TYPE_NAME("la464");
}
if (!strstr(cpu_model, "la464")) {
error_report("LoongArch/TCG needs cpu type la464");
exit(1);
}
if (ram_size < 1 * GiB) {
error_report("ram_size must be greater than 1G.");
exit(1);
}
/* Init CPUs */
for (i = 0; i < machine->smp.cpus; i++) {
cpu_create(machine->cpu_type);
}
/* Add memory region */
memory_region_init_alias(&lams->lowmem, NULL, "loongarch.lowram",
machine->ram, 0, 256 * MiB);
memory_region_add_subregion(address_space_mem, offset, &lams->lowmem);
offset += 256 * MiB;
highram_size = ram_size - 256 * MiB;
memory_region_init_alias(&lams->highmem, NULL, "loongarch.highmem",
machine->ram, offset, highram_size);
memory_region_add_subregion(address_space_mem, 0x90000000, &lams->highmem);
/* Add isa io region */
memory_region_init_alias(&lams->isa_io, NULL, "isa-io",
get_system_io(), 0, LOONGARCH_ISA_IO_SIZE);
memory_region_add_subregion(address_space_mem, LOONGARCH_ISA_IO_BASE,
&lams->isa_io);
/* Initialize the IO interrupt subsystem */
loongarch_irq_init(lams);
}
static void loongarch_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "Loongson-3A5000 LS7A1000 machine";
mc->init = loongarch_init;
mc->default_ram_size = 1 * GiB;
mc->default_cpu_type = LOONGARCH_CPU_TYPE_NAME("la464");
mc->default_ram_id = "loongarch.ram";
mc->max_cpus = LOONGARCH_MAX_VCPUS;
mc->is_default = 1;
mc->default_kernel_irqchip_split = false;
mc->block_default_type = IF_VIRTIO;
mc->default_boot_order = "c";
mc->no_cdrom = 1;
}
static const TypeInfo loongarch_machine_types[] = {
{
.name = TYPE_LOONGARCH_MACHINE,
.parent = TYPE_MACHINE,
.instance_size = sizeof(LoongArchMachineState),
.class_init = loongarch_class_init,
}
};
DEFINE_TYPES(loongarch_machine_types)
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