/*
* QEMU RISC-V Board Compatible with OpenTitan FPGA platform
*
* Copyright (c) 2020 Western Digital
*
* Provides a board compatible with the OpenTitan FPGA platform:
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/riscv/opentitan.h"
#include "qapi/error.h"
#include "hw/boards.h"
#include "hw/misc/unimp.h"
#include "hw/riscv/boot.h"
#include "exec/address-spaces.h"
#include "qemu/units.h"
#include "sysemu/sysemu.h"
static const struct MemmapEntry {
hwaddr base;
hwaddr size;
} ibex_memmap[] = {
[IBEX_ROM] = { 0x00008000, 16 * KiB },
[IBEX_RAM] = { 0x10000000, 0x10000 },
[IBEX_FLASH] = { 0x20000000, 0x80000 },
[IBEX_UART] = { 0x40000000, 0x10000 },
[IBEX_GPIO] = { 0x40010000, 0x10000 },
[IBEX_SPI] = { 0x40020000, 0x10000 },
[IBEX_FLASH_CTRL] = { 0x40030000, 0x10000 },
[IBEX_PINMUX] = { 0x40070000, 0x10000 },
[IBEX_RV_TIMER] = { 0x40080000, 0x10000 },
[IBEX_PLIC] = { 0x40090000, 0x10000 },
[IBEX_PWRMGR] = { 0x400A0000, 0x10000 },
[IBEX_RSTMGR] = { 0x400B0000, 0x10000 },
[IBEX_CLKMGR] = { 0x400C0000, 0x10000 },
[IBEX_AES] = { 0x40110000, 0x10000 },
[IBEX_HMAC] = { 0x40120000, 0x10000 },
[IBEX_ALERT_HANDLER] = { 0x40130000, 0x10000 },
[IBEX_NMI_GEN] = { 0x40140000, 0x10000 },
[IBEX_USBDEV] = { 0x40150000, 0x10000 },
[IBEX_PADCTRL] = { 0x40160000, 0x10000 }
};
static void riscv_opentitan_init(MachineState *machine)
{
const struct MemmapEntry *memmap = ibex_memmap;
OpenTitanState *s = g_new0(OpenTitanState, 1);
MemoryRegion *sys_mem = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
/* Initialize SoC */
object_initialize_child(OBJECT(machine), "soc", &s->soc,
TYPE_RISCV_IBEX_SOC);
qdev_realize(DEVICE(&s->soc), NULL, &error_abort);
memory_region_init_ram(main_mem, NULL, "riscv.lowrisc.ibex.ram",
memmap[IBEX_RAM].size, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[IBEX_RAM].base, main_mem);
if (machine->firmware) {
riscv_load_firmware(machine->firmware, memmap[IBEX_RAM].base, NULL);
}
if (machine->kernel_filename) {
riscv_load_kernel(machine->kernel_filename, NULL);
}
}
static void riscv_opentitan_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Board compatible with OpenTitan";
mc->init = riscv_opentitan_init;
mc->max_cpus = 1;
mc->default_cpu_type = TYPE_RISCV_CPU_IBEX;
}
DEFINE_MACHINE("opentitan", riscv_opentitan_machine_init)
static void riscv_lowrisc_ibex_soc_init(Object *obj)
{
LowRISCIbexSoCState *s = RISCV_IBEX_SOC(obj);
object_initialize_child(obj, "cpus", &s->cpus, TYPE_RISCV_HART_ARRAY);
object_initialize_child(obj, "plic", &s->plic, TYPE_IBEX_PLIC);
object_initialize_child(obj, "uart", &s->uart, TYPE_IBEX_UART);
}
static void riscv_lowrisc_ibex_soc_realize(DeviceState *dev_soc, Error **errp)
{
const struct MemmapEntry *memmap = ibex_memmap;
MachineState *ms = MACHINE(qdev_get_machine());
LowRISCIbexSoCState *s = RISCV_IBEX_SOC(dev_soc);
MemoryRegion *sys_mem = get_system_memory();
Error *err = NULL;
object_property_set_str(OBJECT(&s->cpus), ms->cpu_type, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->cpus), ms->smp.cpus, "num-harts",
&error_abort);
sysbus_realize(SYS_BUS_DEVICE(&s->cpus), &error_abort);
/* Boot ROM */
memory_region_init_rom(&s->rom, OBJECT(dev_soc), "riscv.lowrisc.ibex.rom",
memmap[IBEX_ROM].size, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[IBEX_ROM].base, &s->rom);
/* Flash memory */
memory_region_init_rom(&s->flash_mem, OBJECT(dev_soc), "riscv.lowrisc.ibex.flash",
memmap[IBEX_FLASH].size, &error_fatal);
memory_region_add_subregion(sys_mem, memmap[IBEX_FLASH].base,
&s->flash_mem);
/* PLIC */
sysbus_realize(SYS_BUS_DEVICE(&s->plic), &err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
sysbus_mmio_map(SYS_BUS_DEVICE(&s->plic), 0, memmap[IBEX_PLIC].base);
/* UART */
qdev_prop_set_chr(DEVICE(&(s->uart)), "chardev", serial_hd(0));
sysbus_realize(SYS_BUS_DEVICE(&s->uart), &err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
sysbus_mmio_map(SYS_BUS_DEVICE(&s->uart), 0, memmap[IBEX_UART].base);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
0, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_UART_TX_WATERMARK_IRQ));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
1, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_UART_RX_WATERMARK_IRQ));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
2, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_UART_TX_EMPTY_IRQ));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
3, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_UART_RX_OVERFLOW_IRQ));
create_unimplemented_device("riscv.lowrisc.ibex.gpio",
memmap[IBEX_GPIO].base, memmap[IBEX_GPIO].size);
create_unimplemented_device("riscv.lowrisc.ibex.spi",
memmap[IBEX_SPI].base, memmap[IBEX_SPI].size);
create_unimplemented_device("riscv.lowrisc.ibex.flash_ctrl",
memmap[IBEX_FLASH_CTRL].base, memmap[IBEX_FLASH_CTRL].size);
create_unimplemented_device("riscv.lowrisc.ibex.rv_timer",
memmap[IBEX_RV_TIMER].base, memmap[IBEX_RV_TIMER].size);
create_unimplemented_device("riscv.lowrisc.ibex.pwrmgr",
memmap[IBEX_PWRMGR].base, memmap[IBEX_PWRMGR].size);
create_unimplemented_device("riscv.lowrisc.ibex.rstmgr",
memmap[IBEX_RSTMGR].base, memmap[IBEX_RSTMGR].size);
create_unimplemented_device("riscv.lowrisc.ibex.clkmgr",
memmap[IBEX_CLKMGR].base, memmap[IBEX_CLKMGR].size);
create_unimplemented_device("riscv.lowrisc.ibex.aes",
memmap[IBEX_AES].base, memmap[IBEX_AES].size);
create_unimplemented_device("riscv.lowrisc.ibex.hmac",
memmap[IBEX_HMAC].base, memmap[IBEX_HMAC].size);
create_unimplemented_device("riscv.lowrisc.ibex.pinmux",
memmap[IBEX_PINMUX].base, memmap[IBEX_PINMUX].size);
create_unimplemented_device("riscv.lowrisc.ibex.alert_handler",
memmap[IBEX_ALERT_HANDLER].base, memmap[IBEX_ALERT_HANDLER].size);
create_unimplemented_device("riscv.lowrisc.ibex.nmi_gen",
memmap[IBEX_NMI_GEN].base, memmap[IBEX_NMI_GEN].size);
create_unimplemented_device("riscv.lowrisc.ibex.usbdev",
memmap[IBEX_USBDEV].base, memmap[IBEX_USBDEV].size);
create_unimplemented_device("riscv.lowrisc.ibex.padctrl",
memmap[IBEX_PADCTRL].base, memmap[IBEX_PADCTRL].size);
}
static void riscv_lowrisc_ibex_soc_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->realize = riscv_lowrisc_ibex_soc_realize;
/* Reason: Uses serial_hds in realize function, thus can't be used twice */
dc->user_creatable = false;
}
static const TypeInfo riscv_lowrisc_ibex_soc_type_info = {
.name = TYPE_RISCV_IBEX_SOC,
.parent = TYPE_DEVICE,
.instance_size = sizeof(LowRISCIbexSoCState),
.instance_init = riscv_lowrisc_ibex_soc_init,
.class_init = riscv_lowrisc_ibex_soc_class_init,
};
static void riscv_lowrisc_ibex_soc_register_types(void)
{
type_register_static(&riscv_lowrisc_ibex_soc_type_info);
}
type_init(riscv_lowrisc_ibex_soc_register_types)
