| /* |
| * QEMU RISC-V Board Compatible with SiFive Freedom U SDK |
| * |
| * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu |
| * Copyright (c) 2017 SiFive, Inc. |
| * |
| * Provides a board compatible with the SiFive Freedom U SDK: |
| * |
| * 0) UART |
| * 1) CLINT (Core Level Interruptor) |
| * 2) PLIC (Platform Level Interrupt Controller) |
| * |
| * This board currently uses a hardcoded devicetree that indicates one hart. |
| * |
| * 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_uart.h" |
| #include "hw/riscv/sifive_prci.h" |
| #include "hw/riscv/sifive_u.h" |
| #include "chardev/char.h" |
| #include "sysemu/arch_init.h" |
| #include "sysemu/device_tree.h" |
| #include "exec/address-spaces.h" |
| #include "elf.h" |
| |
| #include <libfdt.h> |
| |
| static const struct MemmapEntry { |
| hwaddr base; |
| hwaddr size; |
| } sifive_u_memmap[] = { |
| [SIFIVE_U_DEBUG] = { 0x0, 0x100 }, |
| [SIFIVE_U_MROM] = { 0x1000, 0x11000 }, |
| [SIFIVE_U_CLINT] = { 0x2000000, 0x10000 }, |
| [SIFIVE_U_PLIC] = { 0xc000000, 0x4000000 }, |
| [SIFIVE_U_UART0] = { 0x10013000, 0x1000 }, |
| [SIFIVE_U_UART1] = { 0x10023000, 0x1000 }, |
| [SIFIVE_U_DRAM] = { 0x80000000, 0x0 }, |
| [SIFIVE_U_GEM] = { 0x100900FC, 0x2000 }, |
| }; |
| |
| #define GEM_REVISION 0x10070109 |
| |
| static uint64_t load_kernel(const char *kernel_filename) |
| { |
| uint64_t kernel_entry, kernel_high; |
| |
| if (load_elf(kernel_filename, NULL, NULL, |
| &kernel_entry, NULL, &kernel_high, |
| 0, EM_RISCV, 1, 0) < 0) { |
| error_report("qemu: could not load kernel '%s'", kernel_filename); |
| exit(1); |
| } |
| return kernel_entry; |
| } |
| |
| static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap, |
| uint64_t mem_size, const char *cmdline) |
| { |
| void *fdt; |
| int cpu; |
| uint32_t *cells; |
| char *nodename; |
| uint32_t plic_phandle; |
| |
| 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, "/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[SIFIVE_U_DRAM].base); |
| qemu_fdt_add_subnode(fdt, nodename); |
| qemu_fdt_setprop_cells(fdt, nodename, "reg", |
| memmap[SIFIVE_U_DRAM].base >> 32, memmap[SIFIVE_U_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.cpus.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.cpus.harts[cpu]); |
| qemu_fdt_add_subnode(fdt, nodename); |
| qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency", |
| SIFIVE_U_CLOCK_FREQ); |
| qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48"); |
| 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_cell(fdt, intc, "linux,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.cpus.num_harts * 4); |
| for (cpu = 0; cpu < s->soc.cpus.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[SIFIVE_U_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[SIFIVE_U_CLINT].base, |
| 0x0, memmap[SIFIVE_U_CLINT].size); |
| qemu_fdt_setprop(fdt, nodename, "interrupts-extended", |
| cells, s->soc.cpus.num_harts * sizeof(uint32_t) * 4); |
| g_free(cells); |
| g_free(nodename); |
| |
| cells = g_new0(uint32_t, s->soc.cpus.num_harts * 4); |
| for (cpu = 0; cpu < s->soc.cpus.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_EXT); |
| cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle); |
| cells[cpu * 4 + 3] = cpu_to_be32(IRQ_S_EXT); |
| g_free(nodename); |
| } |
| nodename = g_strdup_printf("/soc/interrupt-controller@%lx", |
| (long)memmap[SIFIVE_U_PLIC].base); |
| qemu_fdt_add_subnode(fdt, nodename); |
| qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 1); |
| qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,plic0"); |
| qemu_fdt_setprop(fdt, nodename, "interrupt-controller", NULL, 0); |
| qemu_fdt_setprop(fdt, nodename, "interrupts-extended", |
| cells, s->soc.cpus.num_harts * sizeof(uint32_t) * 4); |
| qemu_fdt_setprop_cells(fdt, nodename, "reg", |
| 0x0, memmap[SIFIVE_U_PLIC].base, |
| 0x0, memmap[SIFIVE_U_PLIC].size); |
| qemu_fdt_setprop_string(fdt, nodename, "reg-names", "control"); |
| qemu_fdt_setprop_cell(fdt, nodename, "riscv,max-priority", 7); |
| qemu_fdt_setprop_cell(fdt, nodename, "riscv,ndev", 0x35); |
| qemu_fdt_setprop_cells(fdt, nodename, "phandle", 2); |
| qemu_fdt_setprop_cells(fdt, nodename, "linux,phandle", 2); |
| plic_phandle = qemu_fdt_get_phandle(fdt, nodename); |
| g_free(cells); |
| g_free(nodename); |
| |
| nodename = g_strdup_printf("/soc/ethernet@%lx", |
| (long)memmap[SIFIVE_U_GEM].base); |
| qemu_fdt_add_subnode(fdt, nodename); |
| qemu_fdt_setprop_string(fdt, nodename, "compatible", "cdns,macb"); |
| qemu_fdt_setprop_cells(fdt, nodename, "reg", |
| 0x0, memmap[SIFIVE_U_GEM].base, |
| 0x0, memmap[SIFIVE_U_GEM].size); |
| qemu_fdt_setprop_string(fdt, nodename, "reg-names", "control"); |
| qemu_fdt_setprop_string(fdt, nodename, "phy-mode", "gmii"); |
| qemu_fdt_setprop_cells(fdt, nodename, "interrupt-parent", plic_phandle); |
| qemu_fdt_setprop_cells(fdt, nodename, "interrupts", SIFIVE_U_GEM_IRQ); |
| qemu_fdt_setprop_cells(fdt, nodename, "#address-cells", 1); |
| qemu_fdt_setprop_cells(fdt, nodename, "#size-cells", 0); |
| g_free(nodename); |
| |
| nodename = g_strdup_printf("/soc/ethernet@%lx/ethernet-phy@0", |
| (long)memmap[SIFIVE_U_GEM].base); |
| qemu_fdt_add_subnode(fdt, nodename); |
| qemu_fdt_setprop_cells(fdt, nodename, "reg", 0x0); |
| g_free(nodename); |
| |
| nodename = g_strdup_printf("/soc/uart@%lx", |
| (long)memmap[SIFIVE_U_UART0].base); |
| qemu_fdt_add_subnode(fdt, nodename); |
| qemu_fdt_setprop_string(fdt, nodename, "compatible", "sifive,uart0"); |
| qemu_fdt_setprop_cells(fdt, nodename, "reg", |
| 0x0, memmap[SIFIVE_U_UART0].base, |
| 0x0, memmap[SIFIVE_U_UART0].size); |
| qemu_fdt_setprop_cells(fdt, nodename, "interrupt-parent", plic_phandle); |
| qemu_fdt_setprop_cells(fdt, nodename, "interrupts", 1); |
| |
| qemu_fdt_add_subnode(fdt, "/chosen"); |
| qemu_fdt_setprop_string(fdt, "/chosen", "stdout-path", nodename); |
| qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline); |
| g_free(nodename); |
| } |
| |
| static void riscv_sifive_u_init(MachineState *machine) |
| { |
| const struct MemmapEntry *memmap = sifive_u_memmap; |
| |
| SiFiveUState *s = g_new0(SiFiveUState, 1); |
| MemoryRegion *system_memory = get_system_memory(); |
| MemoryRegion *main_mem = g_new(MemoryRegion, 1); |
| int i; |
| |
| /* Initialize SoC */ |
| object_initialize_child(OBJECT(machine), "soc", &s->soc, |
| sizeof(s->soc), TYPE_RISCV_U_SOC, |
| &error_abort, NULL); |
| object_property_set_bool(OBJECT(&s->soc), true, "realized", |
| &error_abort); |
| |
| /* register RAM */ |
| memory_region_init_ram(main_mem, NULL, "riscv.sifive.u.ram", |
| machine->ram_size, &error_fatal); |
| memory_region_add_subregion(system_memory, memmap[SIFIVE_U_DRAM].base, |
| main_mem); |
| |
| /* create device tree */ |
| create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline); |
| |
| if (machine->kernel_filename) { |
| load_kernel(machine->kernel_filename); |
| } |
| |
| /* 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[SIFIVE_U_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[SIFIVE_U_MROM].base, &address_space_memory); |
| |
| /* copy in the device tree */ |
| if (fdt_pack(s->fdt) || fdt_totalsize(s->fdt) > |
| memmap[SIFIVE_U_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[SIFIVE_U_MROM].base + sizeof(reset_vec), |
| &address_space_memory); |
| } |
| |
| static void riscv_sifive_u_soc_init(Object *obj) |
| { |
| SiFiveUSoCState *s = RISCV_U_SOC(obj); |
| |
| object_initialize_child(obj, "cpus", &s->cpus, sizeof(s->cpus), |
| TYPE_RISCV_HART_ARRAY, &error_abort, NULL); |
| object_property_set_str(OBJECT(&s->cpus), SIFIVE_U_CPU, "cpu-type", |
| &error_abort); |
| object_property_set_int(OBJECT(&s->cpus), smp_cpus, "num-harts", |
| &error_abort); |
| |
| sysbus_init_child_obj(obj, "gem", &s->gem, sizeof(s->gem), |
| TYPE_CADENCE_GEM); |
| } |
| |
| static void riscv_sifive_u_soc_realize(DeviceState *dev, Error **errp) |
| { |
| SiFiveUSoCState *s = RISCV_U_SOC(dev); |
| const struct MemmapEntry *memmap = sifive_u_memmap; |
| MemoryRegion *system_memory = get_system_memory(); |
| MemoryRegion *mask_rom = g_new(MemoryRegion, 1); |
| qemu_irq plic_gpios[SIFIVE_U_PLIC_NUM_SOURCES]; |
| int i; |
| Error *err = NULL; |
| NICInfo *nd = &nd_table[0]; |
| |
| object_property_set_bool(OBJECT(&s->cpus), true, "realized", |
| &error_abort); |
| |
| /* boot rom */ |
| memory_region_init_rom(mask_rom, NULL, "riscv.sifive.u.mrom", |
| memmap[SIFIVE_U_MROM].size, &error_fatal); |
| memory_region_add_subregion(system_memory, memmap[SIFIVE_U_MROM].base, |
| mask_rom); |
| |
| /* MMIO */ |
| s->plic = sifive_plic_create(memmap[SIFIVE_U_PLIC].base, |
| (char *)SIFIVE_U_PLIC_HART_CONFIG, |
| SIFIVE_U_PLIC_NUM_SOURCES, |
| SIFIVE_U_PLIC_NUM_PRIORITIES, |
| SIFIVE_U_PLIC_PRIORITY_BASE, |
| SIFIVE_U_PLIC_PENDING_BASE, |
| SIFIVE_U_PLIC_ENABLE_BASE, |
| SIFIVE_U_PLIC_ENABLE_STRIDE, |
| SIFIVE_U_PLIC_CONTEXT_BASE, |
| SIFIVE_U_PLIC_CONTEXT_STRIDE, |
| memmap[SIFIVE_U_PLIC].size); |
| sifive_uart_create(system_memory, memmap[SIFIVE_U_UART0].base, |
| serial_hd(0), qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_U_UART0_IRQ)); |
| /* sifive_uart_create(system_memory, memmap[SIFIVE_U_UART1].base, |
| serial_hd(1), qdev_get_gpio_in(DEVICE(s->plic), |
| SIFIVE_U_UART1_IRQ)); */ |
| sifive_clint_create(memmap[SIFIVE_U_CLINT].base, |
| memmap[SIFIVE_U_CLINT].size, smp_cpus, |
| SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE); |
| |
| for (i = 0; i < SIFIVE_U_PLIC_NUM_SOURCES; i++) { |
| plic_gpios[i] = qdev_get_gpio_in(DEVICE(s->plic), i); |
| } |
| |
| if (nd->used) { |
| qemu_check_nic_model(nd, TYPE_CADENCE_GEM); |
| qdev_set_nic_properties(DEVICE(&s->gem), nd); |
| } |
| object_property_set_int(OBJECT(&s->gem), GEM_REVISION, "revision", |
| &error_abort); |
| object_property_set_bool(OBJECT(&s->gem), true, "realized", &err); |
| if (err) { |
| error_propagate(errp, err); |
| return; |
| } |
| sysbus_mmio_map(SYS_BUS_DEVICE(&s->gem), 0, memmap[SIFIVE_U_GEM].base); |
| sysbus_connect_irq(SYS_BUS_DEVICE(&s->gem), 0, |
| plic_gpios[SIFIVE_U_GEM_IRQ]); |
| } |
| |
| static void riscv_sifive_u_machine_init(MachineClass *mc) |
| { |
| mc->desc = "RISC-V Board compatible with SiFive U SDK"; |
| mc->init = riscv_sifive_u_init; |
| mc->max_cpus = 1; |
| } |
| |
| DEFINE_MACHINE("sifive_u", riscv_sifive_u_machine_init) |
| |
| static void riscv_sifive_u_soc_class_init(ObjectClass *oc, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(oc); |
| |
| dc->realize = riscv_sifive_u_soc_realize; |
| /* Reason: Uses serial_hds in realize function, thus can't be used twice */ |
| dc->user_creatable = false; |
| } |
| |
| static const TypeInfo riscv_sifive_u_soc_type_info = { |
| .name = TYPE_RISCV_U_SOC, |
| .parent = TYPE_DEVICE, |
| .instance_size = sizeof(SiFiveUSoCState), |
| .instance_init = riscv_sifive_u_soc_init, |
| .class_init = riscv_sifive_u_soc_class_init, |
| }; |
| |
| static void riscv_sifive_u_soc_register_types(void) |
| { |
| type_register_static(&riscv_sifive_u_soc_type_info); |
| } |
| |
| type_init(riscv_sifive_u_soc_register_types) |
