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qemu/hw/riscv/opentitan.c
Alexander Wagner d11e316d84 hw/riscv: Fix OT IBEX reset vector 
The IBEX documentation [1] specifies the reset vector to be "the most
significant 3 bytes of the boot address and the reset value (0x80) as
the least significant byte".

[1] https://github.com/lowRISC/ibex/blob/master/doc/03_reference/exception_interrupts.rst

Signed-off-by: Alexander Wagner <alexander.wagner@ulal.de>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20210420080008.119798-1-alexander.wagner@ulal.de
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2021-05-11 20:02:07 +10:00

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/*
* 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 "qemu/units.h"
#include "sysemu/sysemu.h"
static const MemMapEntry ibex_memmap[] = {
[IBEX_DEV_ROM] = { 0x00008000, 16 * KiB },
[IBEX_DEV_RAM] = { 0x10000000, 0x10000 },
[IBEX_DEV_FLASH] = { 0x20000000, 0x80000 },
[IBEX_DEV_UART] = { 0x40000000, 0x1000 },
[IBEX_DEV_GPIO] = { 0x40040000, 0x1000 },
[IBEX_DEV_SPI] = { 0x40050000, 0x1000 },
[IBEX_DEV_I2C] = { 0x40080000, 0x1000 },
[IBEX_DEV_PATTGEN] = { 0x400e0000, 0x1000 },
[IBEX_DEV_RV_TIMER] = { 0x40100000, 0x1000 },
[IBEX_DEV_SENSOR_CTRL] = { 0x40110000, 0x1000 },
[IBEX_DEV_OTP_CTRL] = { 0x40130000, 0x4000 },
[IBEX_DEV_PWRMGR] = { 0x40400000, 0x1000 },
[IBEX_DEV_RSTMGR] = { 0x40410000, 0x1000 },
[IBEX_DEV_CLKMGR] = { 0x40420000, 0x1000 },
[IBEX_DEV_PINMUX] = { 0x40460000, 0x1000 },
[IBEX_DEV_PADCTRL] = { 0x40470000, 0x1000 },
[IBEX_DEV_USBDEV] = { 0x40500000, 0x1000 },
[IBEX_DEV_FLASH_CTRL] = { 0x41000000, 0x1000 },
[IBEX_DEV_PLIC] = { 0x41010000, 0x1000 },
[IBEX_DEV_AES] = { 0x41100000, 0x1000 },
[IBEX_DEV_HMAC] = { 0x41110000, 0x1000 },
[IBEX_DEV_KMAC] = { 0x41120000, 0x1000 },
[IBEX_DEV_KEYMGR] = { 0x41130000, 0x1000 },
[IBEX_DEV_CSRNG] = { 0x41150000, 0x1000 },
[IBEX_DEV_ENTROPY] = { 0x41160000, 0x1000 },
[IBEX_DEV_EDNO] = { 0x41170000, 0x1000 },
[IBEX_DEV_EDN1] = { 0x41180000, 0x1000 },
[IBEX_DEV_ALERT_HANDLER] = { 0x411b0000, 0x1000 },
[IBEX_DEV_NMI_GEN] = { 0x411c0000, 0x1000 },
[IBEX_DEV_OTBN] = { 0x411d0000, 0x10000 },
};
static void opentitan_board_init(MachineState *machine)
{
const 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_DEV_RAM].size, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[IBEX_DEV_RAM].base, main_mem);
if (machine->firmware) {
riscv_load_firmware(machine->firmware, memmap[IBEX_DEV_RAM].base, NULL);
}
if (machine->kernel_filename) {
riscv_load_kernel(machine->kernel_filename,
memmap[IBEX_DEV_RAM].base, NULL);
}
}
static void opentitan_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Board compatible with OpenTitan";
mc->init = opentitan_board_init;
mc->max_cpus = 1;
mc->default_cpu_type = TYPE_RISCV_CPU_IBEX;
}
DEFINE_MACHINE("opentitan", opentitan_machine_init)
static void 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 lowrisc_ibex_soc_realize(DeviceState *dev_soc, Error **errp)
{
const MemMapEntry *memmap = ibex_memmap;
MachineState *ms = MACHINE(qdev_get_machine());
LowRISCIbexSoCState *s = RISCV_IBEX_SOC(dev_soc);
MemoryRegion *sys_mem = get_system_memory();
object_property_set_str(OBJECT(&s->cpus), "cpu-type", ms->cpu_type,
&error_abort);
object_property_set_int(OBJECT(&s->cpus), "num-harts", ms->smp.cpus,
&error_abort);
object_property_set_int(OBJECT(&s->cpus), "resetvec", 0x8080, &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_DEV_ROM].size, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[IBEX_DEV_ROM].base, &s->rom);
/* Flash memory */
memory_region_init_rom(&s->flash_mem, OBJECT(dev_soc), "riscv.lowrisc.ibex.flash",
memmap[IBEX_DEV_FLASH].size, &error_fatal);
memory_region_add_subregion(sys_mem, memmap[IBEX_DEV_FLASH].base,
&s->flash_mem);
/* PLIC */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->plic), errp)) {
return;
}
sysbus_mmio_map(SYS_BUS_DEVICE(&s->plic), 0, memmap[IBEX_DEV_PLIC].base);
/* UART */
qdev_prop_set_chr(DEVICE(&(s->uart)), "chardev", serial_hd(0));
if (!sysbus_realize(SYS_BUS_DEVICE(&s->uart), errp)) {
return;
}
sysbus_mmio_map(SYS_BUS_DEVICE(&s->uart), 0, memmap[IBEX_DEV_UART].base);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
0, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_UART0_TX_WATERMARK_IRQ));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
1, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_UART0_RX_WATERMARK_IRQ));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
2, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_UART0_TX_EMPTY_IRQ));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart),
3, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_UART0_RX_OVERFLOW_IRQ));
create_unimplemented_device("riscv.lowrisc.ibex.gpio",
memmap[IBEX_DEV_GPIO].base, memmap[IBEX_DEV_GPIO].size);
create_unimplemented_device("riscv.lowrisc.ibex.spi",
memmap[IBEX_DEV_SPI].base, memmap[IBEX_DEV_SPI].size);
create_unimplemented_device("riscv.lowrisc.ibex.i2c",
memmap[IBEX_DEV_I2C].base, memmap[IBEX_DEV_I2C].size);
create_unimplemented_device("riscv.lowrisc.ibex.pattgen",
memmap[IBEX_DEV_PATTGEN].base, memmap[IBEX_DEV_PATTGEN].size);
create_unimplemented_device("riscv.lowrisc.ibex.rv_timer",
memmap[IBEX_DEV_RV_TIMER].base, memmap[IBEX_DEV_RV_TIMER].size);
create_unimplemented_device("riscv.lowrisc.ibex.sensor_ctrl",
memmap[IBEX_DEV_SENSOR_CTRL].base, memmap[IBEX_DEV_SENSOR_CTRL].size);
create_unimplemented_device("riscv.lowrisc.ibex.otp_ctrl",
memmap[IBEX_DEV_OTP_CTRL].base, memmap[IBEX_DEV_OTP_CTRL].size);
create_unimplemented_device("riscv.lowrisc.ibex.pwrmgr",
memmap[IBEX_DEV_PWRMGR].base, memmap[IBEX_DEV_PWRMGR].size);
create_unimplemented_device("riscv.lowrisc.ibex.rstmgr",
memmap[IBEX_DEV_RSTMGR].base, memmap[IBEX_DEV_RSTMGR].size);
create_unimplemented_device("riscv.lowrisc.ibex.clkmgr",
memmap[IBEX_DEV_CLKMGR].base, memmap[IBEX_DEV_CLKMGR].size);
create_unimplemented_device("riscv.lowrisc.ibex.pinmux",
memmap[IBEX_DEV_PINMUX].base, memmap[IBEX_DEV_PINMUX].size);
create_unimplemented_device("riscv.lowrisc.ibex.padctrl",
memmap[IBEX_DEV_PADCTRL].base, memmap[IBEX_DEV_PADCTRL].size);
create_unimplemented_device("riscv.lowrisc.ibex.usbdev",
memmap[IBEX_DEV_USBDEV].base, memmap[IBEX_DEV_USBDEV].size);
create_unimplemented_device("riscv.lowrisc.ibex.flash_ctrl",
memmap[IBEX_DEV_FLASH_CTRL].base, memmap[IBEX_DEV_FLASH_CTRL].size);
create_unimplemented_device("riscv.lowrisc.ibex.aes",
memmap[IBEX_DEV_AES].base, memmap[IBEX_DEV_AES].size);
create_unimplemented_device("riscv.lowrisc.ibex.hmac",
memmap[IBEX_DEV_HMAC].base, memmap[IBEX_DEV_HMAC].size);
create_unimplemented_device("riscv.lowrisc.ibex.kmac",
memmap[IBEX_DEV_KMAC].base, memmap[IBEX_DEV_KMAC].size);
create_unimplemented_device("riscv.lowrisc.ibex.keymgr",
memmap[IBEX_DEV_KEYMGR].base, memmap[IBEX_DEV_KEYMGR].size);
create_unimplemented_device("riscv.lowrisc.ibex.csrng",
memmap[IBEX_DEV_CSRNG].base, memmap[IBEX_DEV_CSRNG].size);
create_unimplemented_device("riscv.lowrisc.ibex.entropy",
memmap[IBEX_DEV_ENTROPY].base, memmap[IBEX_DEV_ENTROPY].size);
create_unimplemented_device("riscv.lowrisc.ibex.edn0",
memmap[IBEX_DEV_EDNO].base, memmap[IBEX_DEV_EDNO].size);
create_unimplemented_device("riscv.lowrisc.ibex.edn1",
memmap[IBEX_DEV_EDN1].base, memmap[IBEX_DEV_EDN1].size);
create_unimplemented_device("riscv.lowrisc.ibex.alert_handler",
memmap[IBEX_DEV_ALERT_HANDLER].base, memmap[IBEX_DEV_ALERT_HANDLER].size);
create_unimplemented_device("riscv.lowrisc.ibex.nmi_gen",
memmap[IBEX_DEV_NMI_GEN].base, memmap[IBEX_DEV_NMI_GEN].size);
create_unimplemented_device("riscv.lowrisc.ibex.otbn",
memmap[IBEX_DEV_OTBN].base, memmap[IBEX_DEV_OTBN].size);
}
static void lowrisc_ibex_soc_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->realize = lowrisc_ibex_soc_realize;
/* Reason: Uses serial_hds in realize function, thus can't be used twice */
dc->user_creatable = false;
}
static const TypeInfo lowrisc_ibex_soc_type_info = {
.name = TYPE_RISCV_IBEX_SOC,
.parent = TYPE_DEVICE,
.instance_size = sizeof(LowRISCIbexSoCState),
.instance_init = lowrisc_ibex_soc_init,
.class_init = lowrisc_ibex_soc_class_init,
};
static void lowrisc_ibex_soc_register_types(void)
{
type_register_static(&lowrisc_ibex_soc_type_info);
}
type_init(lowrisc_ibex_soc_register_types)
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