/*
* QEMU RISC-V Spike Board
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2017-2018 SiFive, Inc.
*
* This provides a RISC-V Board with the following devices:
*
* 0) HTIF Console and Poweroff
* 1) CLINT (Timer and IPI)
* 2) PLIC (Platform Level Interrupt Controller)
*
* 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/boards.h"
#include "hw/loader.h"
#include "hw/sysbus.h"
#include "target/riscv/cpu.h"
#include "hw/riscv/riscv_htif.h"
#include "hw/riscv/riscv_hart.h"
#include "hw/riscv/sifive_clint.h"
#include "hw/riscv/spike.h"
#include "hw/riscv/boot.h"
#include "chardev/char.h"
#include "sysemu/arch_init.h"
#include "sysemu/device_tree.h"
#include "sysemu/qtest.h"
#include "sysemu/sysemu.h"
#include "exec/address-spaces.h"
#include <libfdt.h>
#if defined(TARGET_RISCV32)
# define BIOS_FILENAME "opensbi-riscv32-spike-fw_jump.elf"
#else
# define BIOS_FILENAME "opensbi-riscv64-spike-fw_jump.elf"
#endif
static const struct MemmapEntry {
hwaddr base;
hwaddr size;
} spike_memmap[] = {
[SPIKE_MROM] = { 0x1000, 0x11000 },
[SPIKE_CLINT] = { 0x2000000, 0x10000 },
[SPIKE_DRAM] = { 0x80000000, 0x0 },
};
static void create_fdt(SpikeState *s, const struct MemmapEntry *memmap,
uint64_t mem_size, const char *cmdline)
{
void *fdt;
int cpu;
uint32_t *cells;
char *nodename;
fdt = s->fdt = create_device_tree(&s->fdt_size);
if (!fdt) {
error_report("create_device_tree() failed");
exit(1);
}
qemu_fdt_setprop_string(fdt, "/", "model", "ucbbar,spike-bare,qemu");
qemu_fdt_setprop_string(fdt, "/", "compatible", "ucbbar,spike-bare-dev");
qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
qemu_fdt_add_subnode(fdt, "/htif");
qemu_fdt_setprop_string(fdt, "/htif", "compatible", "ucb,htif0");
qemu_fdt_add_subnode(fdt, "/soc");
qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
qemu_fdt_setprop_string(fdt, "/soc", "compatible", "simple-bus");
qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2);
qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
nodename = g_strdup_printf("/memory@%lx",
(long)memmap[SPIKE_DRAM].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_cells(fdt, nodename, "reg",
memmap[SPIKE_DRAM].base >> 32, memmap[SPIKE_DRAM].base,
mem_size >> 32, mem_size);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
g_free(nodename);
qemu_fdt_add_subnode(fdt, "/cpus");
qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency",
SIFIVE_CLINT_TIMEBASE_FREQ);
qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
for (cpu = s->soc.num_harts - 1; cpu >= 0; cpu--) {
nodename = g_strdup_printf("/cpus/cpu@%d", cpu);
char *intc = g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
char *isa = riscv_isa_string(&s->soc.harts[cpu]);
qemu_fdt_add_subnode(fdt, nodename);
#if defined(TARGET_RISCV32)
qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv32");
#else
qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48");
#endif
qemu_fdt_setprop_string(fdt, nodename, "riscv,isa", isa);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv");
qemu_fdt_setprop_string(fdt, nodename, "status", "okay");
qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu);
qemu_fdt_setprop_string(fdt, nodename, "device_type", "cpu");
qemu_fdt_add_subnode(fdt, intc);
qemu_fdt_setprop_cell(fdt, intc, "phandle", 1);
qemu_fdt_setprop_string(fdt, intc, "compatible", "riscv,cpu-intc");
qemu_fdt_setprop(fdt, intc, "interrupt-controller", NULL, 0);
qemu_fdt_setprop_cell(fdt, intc, "#interrupt-cells", 1);
g_free(isa);
g_free(intc);
g_free(nodename);
}
cells = g_new0(uint32_t, s->soc.num_harts * 4);
for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
nodename =
g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
g_free(nodename);
}
nodename = g_strdup_printf("/soc/clint@%lx",
(long)memmap[SPIKE_CLINT].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[SPIKE_CLINT].base,
0x0, memmap[SPIKE_CLINT].size);
qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
cells, s->soc.num_harts * sizeof(uint32_t) * 4);
g_free(cells);
g_free(nodename);
if (cmdline) {
qemu_fdt_add_subnode(fdt, "/chosen");
qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
}
}
static void spike_board_init(MachineState *machine)
{
const struct MemmapEntry *memmap = spike_memmap;
SpikeState *s = g_new0(SpikeState, 1);
MemoryRegion *system_memory = get_system_memory();
MemoryRegion *main_mem = g_new(MemoryRegion, 1);
MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
int i;
unsigned int smp_cpus = machine->smp.cpus;
/* Initialize SOC */
object_initialize_child(OBJECT(machine), "soc", &s->soc,
TYPE_RISCV_HART_ARRAY);
object_property_set_str(OBJECT(&s->soc), "cpu-type", machine->cpu_type,
&error_abort);
object_property_set_int(OBJECT(&s->soc), "num-harts", smp_cpus,
&error_abort);
sysbus_realize(SYS_BUS_DEVICE(&s->soc), &error_abort);
/* register system main memory (actual RAM) */
memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
machine->ram_size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
main_mem);
/* create device tree */
create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
/* boot rom */
memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom",
memmap[SPIKE_MROM].size, &error_fatal);
memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base,
mask_rom);
riscv_find_and_load_firmware(machine, BIOS_FILENAME,
memmap[SPIKE_DRAM].base,
htif_symbol_callback);
if (machine->kernel_filename) {
uint64_t kernel_entry = riscv_load_kernel(machine->kernel_filename,
htif_symbol_callback);
if (machine->initrd_filename) {
hwaddr start;
hwaddr end = riscv_load_initrd(machine->initrd_filename,
machine->ram_size, kernel_entry,
&start);
qemu_fdt_setprop_cell(s->fdt, "/chosen",
"linux,initrd-start", start);
qemu_fdt_setprop_cell(s->fdt, "/chosen", "linux,initrd-end",
end);
}
}
/* reset vector */
uint32_t reset_vec[8] = {
0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */
0x02028593, /* addi a1, t0, %pcrel_lo(1b) */
0xf1402573, /* csrr a0, mhartid */
#if defined(TARGET_RISCV32)
0x0182a283, /* lw t0, 24(t0) */
#elif defined(TARGET_RISCV64)
0x0182b283, /* ld t0, 24(t0) */
#endif
0x00028067, /* jr t0 */
0x00000000,
memmap[SPIKE_DRAM].base, /* start: .dword DRAM_BASE */
0x00000000,
/* dtb: */
};
/* copy in the reset vector in little_endian byte order */
for (i = 0; i < sizeof(reset_vec) >> 2; i++) {
reset_vec[i] = cpu_to_le32(reset_vec[i]);
}
rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec),
memmap[SPIKE_MROM].base, &address_space_memory);
/* copy in the device tree */
if (fdt_pack(s->fdt) || fdt_totalsize(s->fdt) >
memmap[SPIKE_MROM].size - sizeof(reset_vec)) {
error_report("not enough space to store device-tree");
exit(1);
}
qemu_fdt_dumpdtb(s->fdt, fdt_totalsize(s->fdt));
rom_add_blob_fixed_as("mrom.fdt", s->fdt, fdt_totalsize(s->fdt),
memmap[SPIKE_MROM].base + sizeof(reset_vec),
&address_space_memory);
/* initialize HTIF using symbols found in load_kernel */
htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
/* Core Local Interruptor (timer and IPI) */
sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
false);
}
static void spike_machine_init(MachineClass *mc)
{
mc->desc = "RISC-V Spike Board";
mc->init = spike_board_init;
mc->max_cpus = 8;
mc->is_default = true;
mc->default_cpu_type = SPIKE_V1_10_0_CPU;
}
DEFINE_MACHINE("spike", spike_machine_init)
