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qemu/hw/riscv/opentitan.c
Samuel Holland 55c136599f hw/riscv: Respect firmware ELF entry point 
When riscv_load_firmware() loads an ELF, the ELF segment addresses are
used, not the passed-in firmware_load_addr. The machine models assume
the firmware entry point is what they provided for firmware_load_addr,
and use that address to generate the boot ROM, so if the ELF is linked
at any other address, the boot ROM will jump to empty memory.

Pass back the ELF entry point to use when generating the boot ROM, so
the boot ROM can jump to firmware loaded anywhere in RAM. For example,
on the virt machine, this allows using an OpenSBI fw_dynamic.elf built
with FW_TEXT_START values other than 0x80000000.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240817002651.3209701-1-samuel.holland@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-10-02 15:11:51 +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 "qemu/cutils.h"
#include "hw/riscv/opentitan.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/boards.h"
#include "hw/misc/unimp.h"
#include "hw/riscv/boot.h"
#include "qemu/units.h"
#include "sysemu/sysemu.h"
/*
* This version of the OpenTitan machine currently supports
* OpenTitan RTL version:
* <lowRISC/opentitan@565e4af39760a123c59a184aa2f5812a961fde47>
*
* MMIO mapping as per (specified commit):
* lowRISC/opentitan: hw/top_earlgrey/sw/autogen/top_earlgrey_memory.h
*/
static const MemMapEntry ibex_memmap[] = {
[IBEX_DEV_ROM] = { 0x00008000, 0x8000 },
[IBEX_DEV_RAM] = { 0x10000000, 0x20000 },
[IBEX_DEV_FLASH] = { 0x20000000, 0x100000 },
[IBEX_DEV_UART] = { 0x40000000, 0x40 },
[IBEX_DEV_GPIO] = { 0x40040000, 0x40 },
[IBEX_DEV_SPI_DEVICE] = { 0x40050000, 0x2000 },
[IBEX_DEV_I2C] = { 0x40080000, 0x80 },
[IBEX_DEV_PATTGEN] = { 0x400e0000, 0x40 },
[IBEX_DEV_TIMER] = { 0x40100000, 0x200 },
[IBEX_DEV_OTP_CTRL] = { 0x40130000, 0x2000 },
[IBEX_DEV_LC_CTRL] = { 0x40140000, 0x100 },
[IBEX_DEV_ALERT_HANDLER] = { 0x40150000, 0x800 },
[IBEX_DEV_SPI_HOST0] = { 0x40300000, 0x40 },
[IBEX_DEV_SPI_HOST1] = { 0x40310000, 0x40 },
[IBEX_DEV_USBDEV] = { 0x40320000, 0x1000 },
[IBEX_DEV_PWRMGR] = { 0x40400000, 0x80 },
[IBEX_DEV_RSTMGR] = { 0x40410000, 0x80 },
[IBEX_DEV_CLKMGR] = { 0x40420000, 0x80 },
[IBEX_DEV_PINMUX] = { 0x40460000, 0x1000 },
[IBEX_DEV_AON_TIMER] = { 0x40470000, 0x40 },
[IBEX_DEV_SENSOR_CTRL] = { 0x40490000, 0x40 },
[IBEX_DEV_FLASH_CTRL] = { 0x41000000, 0x200 },
[IBEX_DEV_AES] = { 0x41100000, 0x100 },
[IBEX_DEV_HMAC] = { 0x41110000, 0x1000 },
[IBEX_DEV_KMAC] = { 0x41120000, 0x1000 },
[IBEX_DEV_OTBN] = { 0x41130000, 0x10000 },
[IBEX_DEV_KEYMGR] = { 0x41140000, 0x100 },
[IBEX_DEV_CSRNG] = { 0x41150000, 0x80 },
[IBEX_DEV_ENTROPY] = { 0x41160000, 0x100 },
[IBEX_DEV_EDNO] = { 0x41170000, 0x80 },
[IBEX_DEV_EDN1] = { 0x41180000, 0x80 },
[IBEX_DEV_SRAM_CTRL] = { 0x411c0000, 0x20 },
[IBEX_DEV_IBEX_CFG] = { 0x411f0000, 0x100 },
[IBEX_DEV_PLIC] = { 0x48000000, 0x8000000 },
[IBEX_DEV_FLASH_VIRTUAL] = { 0x80000000, 0x80000 },
};
static void opentitan_machine_init(MachineState *machine)
{
MachineClass *mc = MACHINE_GET_CLASS(machine);
OpenTitanState *s = OPENTITAN_MACHINE(machine);
const MemMapEntry *memmap = ibex_memmap;
MemoryRegion *sys_mem = get_system_memory();
if (machine->ram_size != mc->default_ram_size) {
char *sz = size_to_str(mc->default_ram_size);
error_report("Invalid RAM size, should be %s", sz);
g_free(sz);
exit(EXIT_FAILURE);
}
/* Initialize SoC */
object_initialize_child(OBJECT(machine), "soc", &s->soc,
TYPE_RISCV_IBEX_SOC);
qdev_realize(DEVICE(&s->soc), NULL, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[IBEX_DEV_RAM].base, machine->ram);
if (machine->firmware) {
hwaddr firmware_load_addr = memmap[IBEX_DEV_RAM].base;
riscv_load_firmware(machine->firmware, &firmware_load_addr, NULL);
}
if (machine->kernel_filename) {
riscv_load_kernel(machine, &s->soc.cpus,
memmap[IBEX_DEV_RAM].base,
false, NULL);
}
}
static void opentitan_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "RISC-V Board compatible with OpenTitan";
mc->init = opentitan_machine_init;
mc->max_cpus = 1;
mc->default_cpu_type = TYPE_RISCV_CPU_IBEX;
mc->default_ram_id = "riscv.lowrisc.ibex.ram";
mc->default_ram_size = ibex_memmap[IBEX_DEV_RAM].size;
}
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_SIFIVE_PLIC);
object_initialize_child(obj, "uart", &s->uart, TYPE_IBEX_UART);
object_initialize_child(obj, "timer", &s->timer, TYPE_IBEX_TIMER);
for (int i = 0; i < OPENTITAN_NUM_SPI_HOSTS; i++) {
object_initialize_child(obj, "spi_host[*]", &s->spi_host[i],
TYPE_IBEX_SPI_HOST);
}
}
static void lowrisc_ibex_soc_realize(DeviceState *dev_soc, Error **errp)
{
const MemMapEntry *memmap = ibex_memmap;
DeviceState *dev;
SysBusDevice *busdev;
MachineState *ms = MACHINE(qdev_get_machine());
LowRISCIbexSoCState *s = RISCV_IBEX_SOC(dev_soc);
MemoryRegion *sys_mem = get_system_memory();
int i;
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", s->resetvec,
&error_abort);
sysbus_realize(SYS_BUS_DEVICE(&s->cpus), &error_fatal);
/* 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_init_alias(&s->flash_alias, OBJECT(dev_soc),
"riscv.lowrisc.ibex.flash_virtual", &s->flash_mem, 0,
memmap[IBEX_DEV_FLASH_VIRTUAL].size);
memory_region_add_subregion(sys_mem, memmap[IBEX_DEV_FLASH].base,
&s->flash_mem);
memory_region_add_subregion(sys_mem, memmap[IBEX_DEV_FLASH_VIRTUAL].base,
&s->flash_alias);
/* PLIC */
qdev_prop_set_string(DEVICE(&s->plic), "hart-config", "M");
qdev_prop_set_uint32(DEVICE(&s->plic), "num-sources", 180);
qdev_prop_set_uint32(DEVICE(&s->plic), "num-priorities", 3);
qdev_prop_set_uint32(DEVICE(&s->plic), "pending-base", 0x1000);
qdev_prop_set_uint32(DEVICE(&s->plic), "enable-base", 0x2000);
qdev_prop_set_uint32(DEVICE(&s->plic), "enable-stride", 32);
qdev_prop_set_uint32(DEVICE(&s->plic), "context-base", 0x200000);
qdev_prop_set_uint32(DEVICE(&s->plic), "context-stride", 8);
qdev_prop_set_uint32(DEVICE(&s->plic), "aperture-size", memmap[IBEX_DEV_PLIC].size);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->plic), errp)) {
return;
}
sysbus_mmio_map(SYS_BUS_DEVICE(&s->plic), 0, memmap[IBEX_DEV_PLIC].base);
for (i = 0; i < ms->smp.cpus; i++) {
CPUState *cpu = qemu_get_cpu(i);
qdev_connect_gpio_out(DEVICE(&s->plic), ms->smp.cpus + i,
qdev_get_gpio_in(DEVICE(cpu), IRQ_M_EXT));
}
/* 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));
if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer), errp)) {
return;
}
sysbus_mmio_map(SYS_BUS_DEVICE(&s->timer), 0, memmap[IBEX_DEV_TIMER].base);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->timer),
0, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_TIMER_TIMEREXPIRED0_0));
qdev_connect_gpio_out(DEVICE(&s->timer), 0,
qdev_get_gpio_in(DEVICE(qemu_get_cpu(0)),
IRQ_M_TIMER));
/* SPI-Hosts */
for (i = 0; i < OPENTITAN_NUM_SPI_HOSTS; ++i) {
dev = DEVICE(&(s->spi_host[i]));
if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi_host[i]), errp)) {
return;
}
busdev = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(busdev, 0, memmap[IBEX_DEV_SPI_HOST0 + i].base);
switch (i) {
case OPENTITAN_SPI_HOST0:
sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_SPI_HOST0_ERR_IRQ));
sysbus_connect_irq(busdev, 1, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_SPI_HOST0_SPI_EVENT_IRQ));
break;
case OPENTITAN_SPI_HOST1:
sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_SPI_HOST1_ERR_IRQ));
sysbus_connect_irq(busdev, 1, qdev_get_gpio_in(DEVICE(&s->plic),
IBEX_SPI_HOST1_SPI_EVENT_IRQ));
break;
}
}
create_unimplemented_device("riscv.lowrisc.ibex.gpio",
memmap[IBEX_DEV_GPIO].base, memmap[IBEX_DEV_GPIO].size);
create_unimplemented_device("riscv.lowrisc.ibex.spi_device",
memmap[IBEX_DEV_SPI_DEVICE].base, memmap[IBEX_DEV_SPI_DEVICE].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.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.lc_ctrl",
memmap[IBEX_DEV_LC_CTRL].base, memmap[IBEX_DEV_LC_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.aon_timer",
memmap[IBEX_DEV_AON_TIMER].base, memmap[IBEX_DEV_AON_TIMER].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.sram_ctrl",
memmap[IBEX_DEV_SRAM_CTRL].base, memmap[IBEX_DEV_SRAM_CTRL].size);
create_unimplemented_device("riscv.lowrisc.ibex.otbn",
memmap[IBEX_DEV_OTBN].base, memmap[IBEX_DEV_OTBN].size);
create_unimplemented_device("riscv.lowrisc.ibex.ibex_cfg",
memmap[IBEX_DEV_IBEX_CFG].base, memmap[IBEX_DEV_IBEX_CFG].size);
}
static Property lowrisc_ibex_soc_props[] = {
DEFINE_PROP_UINT32("resetvec", LowRISCIbexSoCState, resetvec, 0x20000400),
DEFINE_PROP_END_OF_LIST()
};
static void lowrisc_ibex_soc_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
device_class_set_props(dc, lowrisc_ibex_soc_props);
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 open_titan_types[] = {
{
.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,
}, {
.name = TYPE_OPENTITAN_MACHINE,
.parent = TYPE_MACHINE,
.instance_size = sizeof(OpenTitanState),
.class_init = opentitan_machine_class_init,
}
};
DEFINE_TYPES(open_titan_types)
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