/*
* QEMU RISC-V Board Compatible with SiFive Freedom E SDK
*
* Copyright (c) 2017 SiFive, Inc.
*
* Provides a board compatible with the SiFive Freedom E SDK:
*
* 0) UART
* 1) CLINT (Core Level Interruptor)
* 2) PLIC (Platform Level Interrupt Controller)
* 3) PRCI (Power, Reset, Clock, Interrupt)
* 4) Registers emulated as RAM: AON, GPIO, QSPI, PWM
* 5) Flash memory emulated as RAM
*
* The Mask ROM reset vector jumps to the flash payload at 0x2040_0000.
* The OTP ROM and Flash boot code will be emulated in a future version.
*
* 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/log.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "hw/char/serial.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/riscv_hart.h"
#include "hw/riscv/sifive_plic.h"
#include "hw/riscv/sifive_clint.h"
#include "hw/riscv/sifive_prci.h"
#include "hw/riscv/sifive_uart.h"
#include "hw/riscv/sifive_e.h"
#include "chardev/char.h"
#include "sysemu/arch_init.h"
#include "exec/address-spaces.h"
#include "elf.h"
static const struct MemmapEntry {
hwaddr base;
hwaddr size;
} sifive_e_memmap[] = {
[SIFIVE_E_DEBUG] = { 0x0, 0x100 },
[SIFIVE_E_MROM] = { 0x1000, 0x2000 },
[SIFIVE_E_OTP] = { 0x20000, 0x2000 },
[SIFIVE_E_CLINT] = { 0x2000000, 0x10000 },
[SIFIVE_E_PLIC] = { 0xc000000, 0x4000000 },
[SIFIVE_E_AON] = { 0x10000000, 0x8000 },
[SIFIVE_E_PRCI] = { 0x10008000, 0x8000 },
[SIFIVE_E_OTP_CTRL] = { 0x10010000, 0x1000 },
[SIFIVE_E_GPIO0] = { 0x10012000, 0x1000 },
[SIFIVE_E_UART0] = { 0x10013000, 0x1000 },
[SIFIVE_E_QSPI0] = { 0x10014000, 0x1000 },
[SIFIVE_E_PWM0] = { 0x10015000, 0x1000 },
[SIFIVE_E_UART1] = { 0x10023000, 0x1000 },
[SIFIVE_E_QSPI1] = { 0x10024000, 0x1000 },
[SIFIVE_E_PWM1] = { 0x10025000, 0x1000 },
[SIFIVE_E_QSPI2] = { 0x10034000, 0x1000 },
[SIFIVE_E_PWM2] = { 0x10035000, 0x1000 },
[SIFIVE_E_XIP] = { 0x20000000, 0x20000000 },
[SIFIVE_E_DTIM] = { 0x80000000, 0x4000 }
};
static void copy_le32_to_phys(hwaddr pa, uint32_t *rom, size_t len)
{
int i;
for (i = 0; i < (len >> 2); i++) {
stl_phys(&address_space_memory, pa + (i << 2), rom[i]);
}
}
static uint64_t identity_translate(void *opaque, uint64_t addr)
{
return addr;
}
static uint64_t load_kernel(const char *kernel_filename)
{
uint64_t kernel_entry, kernel_high;
if (load_elf(kernel_filename, identity_translate, NULL,
&kernel_entry, NULL, &kernel_high,
0, ELF_MACHINE, 1, 0) < 0) {
error_report("qemu: could not load kernel '%s'", kernel_filename);
exit(1);
}
return kernel_entry;
}
static void sifive_mmio_emulate(MemoryRegion *parent, const char *name,
uintptr_t offset, uintptr_t length)
{
MemoryRegion *mock_mmio = g_new(MemoryRegion, 1);
memory_region_init_ram(mock_mmio, NULL, name, length, &error_fatal);
memory_region_add_subregion(parent, offset, mock_mmio);
}
static void riscv_sifive_e_init(MachineState *machine)
{
const struct MemmapEntry *memmap = sifive_e_memmap;
SiFiveEState *s = g_new0(SiFiveEState, 1);
MemoryRegion *sys_mem = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
MemoryRegion *xip_mem = g_new(MemoryRegion, 1);
/* Initialize SOC */
object_initialize(&s->soc, sizeof(s->soc), TYPE_RISCV_HART_ARRAY);
object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
&error_abort);
object_property_set_str(OBJECT(&s->soc), SIFIVE_E_CPU, "cpu-type",
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized",
&error_abort);
/* Data Tightly Integrated Memory */
memory_region_init_ram(main_mem, NULL, "riscv.sifive.e.ram",
memmap[SIFIVE_E_DTIM].size, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[SIFIVE_E_DTIM].base, main_mem);
/* Mask ROM */
memory_region_init_ram(mask_rom, NULL, "riscv.sifive.e.mrom",
memmap[SIFIVE_E_MROM].size, &error_fatal);
memory_region_add_subregion(sys_mem,
memmap[SIFIVE_E_MROM].base, mask_rom);
/* MMIO */
s->plic = sifive_plic_create(memmap[SIFIVE_E_PLIC].base,
(char *)SIFIVE_E_PLIC_HART_CONFIG,
SIFIVE_E_PLIC_NUM_SOURCES,
SIFIVE_E_PLIC_NUM_PRIORITIES,
SIFIVE_E_PLIC_PRIORITY_BASE,
SIFIVE_E_PLIC_PENDING_BASE,
SIFIVE_E_PLIC_ENABLE_BASE,
SIFIVE_E_PLIC_ENABLE_STRIDE,
SIFIVE_E_PLIC_CONTEXT_BASE,
SIFIVE_E_PLIC_CONTEXT_STRIDE,
memmap[SIFIVE_E_PLIC].size);
sifive_clint_create(memmap[SIFIVE_E_CLINT].base,
memmap[SIFIVE_E_CLINT].size, smp_cpus,
SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.aon",
memmap[SIFIVE_E_AON].base, memmap[SIFIVE_E_AON].size);
sifive_prci_create(memmap[SIFIVE_E_PRCI].base);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.gpio0",
memmap[SIFIVE_E_GPIO0].base, memmap[SIFIVE_E_GPIO0].size);
sifive_uart_create(sys_mem, memmap[SIFIVE_E_UART0].base,
serial_hd(0), SIFIVE_PLIC(s->plic)->irqs[SIFIVE_E_UART0_IRQ]);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi0",
memmap[SIFIVE_E_QSPI0].base, memmap[SIFIVE_E_QSPI0].size);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm0",
memmap[SIFIVE_E_PWM0].base, memmap[SIFIVE_E_PWM0].size);
/* sifive_uart_create(sys_mem, memmap[SIFIVE_E_UART1].base,
serial_hd(1), SIFIVE_PLIC(s->plic)->irqs[SIFIVE_E_UART1_IRQ]); */
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi1",
memmap[SIFIVE_E_QSPI1].base, memmap[SIFIVE_E_QSPI1].size);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm1",
memmap[SIFIVE_E_PWM1].base, memmap[SIFIVE_E_PWM1].size);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi2",
memmap[SIFIVE_E_QSPI2].base, memmap[SIFIVE_E_QSPI2].size);
sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm2",
memmap[SIFIVE_E_PWM2].base, memmap[SIFIVE_E_PWM2].size);
/* Flash memory */
memory_region_init_ram(xip_mem, NULL, "riscv.sifive.e.xip",
memmap[SIFIVE_E_XIP].size, &error_fatal);
memory_region_set_readonly(xip_mem, true);
memory_region_add_subregion(sys_mem, memmap[SIFIVE_E_XIP].base, xip_mem);
/* Mask ROM reset vector */
uint32_t reset_vec[2] = {
0x204002b7, /* 0x1000: lui t0,0x20400 */
0x00028067, /* 0x1004: jr t0 */
};
/* copy in the reset vector */
copy_le32_to_phys(memmap[SIFIVE_E_MROM].base, reset_vec, sizeof(reset_vec));
memory_region_set_readonly(mask_rom, true);
if (machine->kernel_filename) {
load_kernel(machine->kernel_filename);
}
}
static int riscv_sifive_e_sysbus_device_init(SysBusDevice *sysbusdev)
{
return 0;
}
static void riscv_sifive_e_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = riscv_sifive_e_sysbus_device_init;
}
static const TypeInfo riscv_sifive_e_device = {
.name = TYPE_SIFIVE_E,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SiFiveEState),
.class_init = riscv_sifive_e_class_init,
};
static void riscv_sifive_e_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Board compatible with SiFive E SDK";
mc->init = riscv_sifive_e_init;
mc->max_cpus = 1;
}
DEFINE_MACHINE("sifive_e", riscv_sifive_e_machine_init)
static void riscv_sifive_e_register_types(void)
{
type_register_static(&riscv_sifive_e_device);
}
type_init(riscv_sifive_e_register_types);