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-rw-r--r--hw/riscv/spike.c376
1 files changed, 376 insertions, 0 deletions
diff --git a/hw/riscv/spike.c b/hw/riscv/spike.c
new file mode 100644
index 0000000000..2d1f114d40
--- /dev/null
+++ b/hw/riscv/spike.c
@@ -0,0 +1,376 @@
+/*
+ * 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/hw.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 "chardev/char.h"
+#include "sysemu/arch_init.h"
+#include "sysemu/device_tree.h"
+#include "exec/address-spaces.h"
+#include "elf.h"
+
+static const struct MemmapEntry {
+ hwaddr base;
+ hwaddr size;
+} spike_memmap[] = {
+ [SPIKE_MROM] = { 0x1000, 0x2000 },
+ [SPIKE_CLINT] = { 0x2000000, 0x10000 },
+ [SPIKE_DRAM] = { 0x80000000, 0x0 },
+};
+
+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_ram_sym(kernel_filename, identity_translate, NULL,
+ &kernel_entry, NULL, &kernel_high, 0, ELF_MACHINE, 1, 0,
+ NULL, true, htif_symbol_callback) < 0) {
+ error_report("qemu: could not load kernel '%s'", kernel_filename);
+ exit(1);
+ }
+ return kernel_entry;
+}
+
+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", "ucbbar,spike-bare-soc");
+ 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", 10000000);
+ 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);
+ qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency", 1000000000);
+ 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.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);
+
+ qemu_fdt_add_subnode(fdt, "/chosen");
+ qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
+ }
+
+static void spike_v1_10_0_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 *boot_rom = 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), SPIKE_V1_10_0_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);
+
+ /* 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_ram(boot_rom, NULL, "riscv.spike.bootrom",
+ s->fdt_size + 0x2000, &error_fatal);
+ memory_region_add_subregion(system_memory, 0x0, boot_rom);
+
+ 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[SPIKE_DRAM].base, /* start: .dword DRAM_BASE */
+ 0x00000000,
+ /* dtb: */
+ };
+
+ /* copy in the reset vector */
+ copy_le32_to_phys(memmap[SPIKE_MROM].base, reset_vec, sizeof(reset_vec));
+
+ /* copy in the device tree */
+ qemu_fdt_dumpdtb(s->fdt, s->fdt_size);
+ cpu_physical_memory_write(memmap[SPIKE_MROM].base + sizeof(reset_vec),
+ s->fdt, s->fdt_size);
+
+ /* initialize HTIF using symbols found in load_kernel */
+ htif_mm_init(system_memory, boot_rom, &s->soc.harts[0].env, serial_hds[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);
+}
+
+static void spike_v1_09_1_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 *boot_rom = 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), SPIKE_V1_09_1_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);
+
+ /* 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);
+
+ /* boot rom */
+ memory_region_init_ram(boot_rom, NULL, "riscv.spike.bootrom",
+ 0x40000, &error_fatal);
+ memory_region_add_subregion(system_memory, 0x0, boot_rom);
+
+ if (machine->kernel_filename) {
+ load_kernel(machine->kernel_filename);
+ }
+
+ /* reset vector */
+ uint32_t reset_vec[8] = {
+ 0x297 + memmap[SPIKE_DRAM].base - memmap[SPIKE_MROM].base, /* lui */
+ 0x00028067, /* jump to DRAM_BASE */
+ 0x00000000, /* reserved */
+ memmap[SPIKE_MROM].base + sizeof(reset_vec), /* config string pointer */
+ 0, 0, 0, 0 /* trap vector */
+ };
+
+ /* part one of config string - before memory size specified */
+ const char *config_string_tmpl =
+ "platform {\n"
+ " vendor ucb;\n"
+ " arch spike;\n"
+ "};\n"
+ "rtc {\n"
+ " addr 0x%" PRIx64 "x;\n"
+ "};\n"
+ "ram {\n"
+ " 0 {\n"
+ " addr 0x%" PRIx64 "x;\n"
+ " size 0x%" PRIx64 "x;\n"
+ " };\n"
+ "};\n"
+ "core {\n"
+ " 0" " {\n"
+ " " "0 {\n"
+ " isa %s;\n"
+ " timecmp 0x%" PRIx64 "x;\n"
+ " ipi 0x%" PRIx64 "x;\n"
+ " };\n"
+ " };\n"
+ "};\n";
+
+ /* build config string with supplied memory size */
+ char *isa = riscv_isa_string(&s->soc.harts[0]);
+ size_t config_string_size = strlen(config_string_tmpl) + 48;
+ char *config_string = malloc(config_string_size);
+ snprintf(config_string, config_string_size, config_string_tmpl,
+ (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIME_BASE,
+ (uint64_t)memmap[SPIKE_DRAM].base,
+ (uint64_t)ram_size, isa,
+ (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIMECMP_BASE,
+ (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_SIP_BASE);
+ g_free(isa);
+ size_t config_string_len = strlen(config_string);
+
+ /* copy in the reset vector */
+ copy_le32_to_phys(memmap[SPIKE_MROM].base, reset_vec, sizeof(reset_vec));
+
+ /* copy in the config string */
+ cpu_physical_memory_write(memmap[SPIKE_MROM].base + sizeof(reset_vec),
+ config_string, config_string_len);
+
+ /* initialize HTIF using symbols found in load_kernel */
+ htif_mm_init(system_memory, boot_rom, &s->soc.harts[0].env, serial_hds[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);
+}
+
+static const TypeInfo spike_v_1_09_1_device = {
+ .name = TYPE_RISCV_SPIKE_V1_09_1_BOARD,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(SpikeState),
+};
+
+static const TypeInfo spike_v_1_10_0_device = {
+ .name = TYPE_RISCV_SPIKE_V1_10_0_BOARD,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(SpikeState),
+};
+
+static void spike_v1_09_1_machine_init(MachineClass *mc)
+{
+ mc->desc = "RISC-V Spike Board (Privileged ISA v1.9.1)";
+ mc->init = spike_v1_09_1_board_init;
+ mc->max_cpus = 1;
+}
+
+static void spike_v1_10_0_machine_init(MachineClass *mc)
+{
+ mc->desc = "RISC-V Spike Board (Privileged ISA v1.10)";
+ mc->init = spike_v1_10_0_board_init;
+ mc->max_cpus = 1;
+ mc->is_default = 1;
+}
+
+DEFINE_MACHINE("spike_v1.9.1", spike_v1_09_1_machine_init)
+DEFINE_MACHINE("spike_v1.10", spike_v1_10_0_machine_init)
+
+static void riscv_spike_board_register_types(void)
+{
+ type_register_static(&spike_v_1_09_1_device);
+ type_register_static(&spike_v_1_10_0_device);
+}
+
+type_init(riscv_spike_board_register_types);
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