1 /* 2 * QEMU RISC-V Spike Board 3 * 4 * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu 5 * Copyright (c) 2017-2018 SiFive, Inc. 6 * 7 * This provides a RISC-V Board with the following devices: 8 * 9 * 0) HTIF Console and Poweroff 10 * 1) CLINT (Timer and IPI) 11 * 2) PLIC (Platform Level Interrupt Controller) 12 * 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms and conditions of the GNU General Public License, 15 * version 2 or later, as published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope it will be useful, but WITHOUT 18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 20 * more details. 21 * 22 * You should have received a copy of the GNU General Public License along with 23 * this program. If not, see <http://www.gnu.org/licenses/>. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "qemu/log.h" 28 #include "qemu/error-report.h" 29 #include "qapi/error.h" 30 #include "hw/boards.h" 31 #include "hw/loader.h" 32 #include "hw/sysbus.h" 33 #include "target/riscv/cpu.h" 34 #include "hw/riscv/riscv_htif.h" 35 #include "hw/riscv/riscv_hart.h" 36 #include "hw/riscv/sifive_clint.h" 37 #include "hw/riscv/spike.h" 38 #include "hw/riscv/boot.h" 39 #include "chardev/char.h" 40 #include "sysemu/arch_init.h" 41 #include "sysemu/device_tree.h" 42 #include "sysemu/qtest.h" 43 #include "sysemu/sysemu.h" 44 #include "exec/address-spaces.h" 45 46 #include <libfdt.h> 47 48 static const struct MemmapEntry { 49 hwaddr base; 50 hwaddr size; 51 } spike_memmap[] = { 52 [SPIKE_MROM] = { 0x1000, 0x11000 }, 53 [SPIKE_CLINT] = { 0x2000000, 0x10000 }, 54 [SPIKE_DRAM] = { 0x80000000, 0x0 }, 55 }; 56 57 static void create_fdt(SpikeState *s, const struct MemmapEntry *memmap, 58 uint64_t mem_size, const char *cmdline) 59 { 60 void *fdt; 61 int cpu; 62 uint32_t *cells; 63 char *nodename; 64 65 fdt = s->fdt = create_device_tree(&s->fdt_size); 66 if (!fdt) { 67 error_report("create_device_tree() failed"); 68 exit(1); 69 } 70 71 qemu_fdt_setprop_string(fdt, "/", "model", "ucbbar,spike-bare,qemu"); 72 qemu_fdt_setprop_string(fdt, "/", "compatible", "ucbbar,spike-bare-dev"); 73 qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x2); 74 qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2); 75 76 qemu_fdt_add_subnode(fdt, "/htif"); 77 qemu_fdt_setprop_string(fdt, "/htif", "compatible", "ucb,htif0"); 78 79 qemu_fdt_add_subnode(fdt, "/soc"); 80 qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0); 81 qemu_fdt_setprop_string(fdt, "/soc", "compatible", "simple-bus"); 82 qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2); 83 qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2); 84 85 nodename = g_strdup_printf("/memory@%lx", 86 (long)memmap[SPIKE_DRAM].base); 87 qemu_fdt_add_subnode(fdt, nodename); 88 qemu_fdt_setprop_cells(fdt, nodename, "reg", 89 memmap[SPIKE_DRAM].base >> 32, memmap[SPIKE_DRAM].base, 90 mem_size >> 32, mem_size); 91 qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory"); 92 g_free(nodename); 93 94 qemu_fdt_add_subnode(fdt, "/cpus"); 95 qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency", 96 SIFIVE_CLINT_TIMEBASE_FREQ); 97 qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0); 98 qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1); 99 100 for (cpu = s->soc.num_harts - 1; cpu >= 0; cpu--) { 101 nodename = g_strdup_printf("/cpus/cpu@%d", cpu); 102 char *intc = g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu); 103 char *isa = riscv_isa_string(&s->soc.harts[cpu]); 104 qemu_fdt_add_subnode(fdt, nodename); 105 qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48"); 106 qemu_fdt_setprop_string(fdt, nodename, "riscv,isa", isa); 107 qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv"); 108 qemu_fdt_setprop_string(fdt, nodename, "status", "okay"); 109 qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu); 110 qemu_fdt_setprop_string(fdt, nodename, "device_type", "cpu"); 111 qemu_fdt_add_subnode(fdt, intc); 112 qemu_fdt_setprop_cell(fdt, intc, "phandle", 1); 113 qemu_fdt_setprop_string(fdt, intc, "compatible", "riscv,cpu-intc"); 114 qemu_fdt_setprop(fdt, intc, "interrupt-controller", NULL, 0); 115 qemu_fdt_setprop_cell(fdt, intc, "#interrupt-cells", 1); 116 g_free(isa); 117 g_free(intc); 118 g_free(nodename); 119 } 120 121 cells = g_new0(uint32_t, s->soc.num_harts * 4); 122 for (cpu = 0; cpu < s->soc.num_harts; cpu++) { 123 nodename = 124 g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu); 125 uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename); 126 cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle); 127 cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT); 128 cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle); 129 cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER); 130 g_free(nodename); 131 } 132 nodename = g_strdup_printf("/soc/clint@%lx", 133 (long)memmap[SPIKE_CLINT].base); 134 qemu_fdt_add_subnode(fdt, nodename); 135 qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0"); 136 qemu_fdt_setprop_cells(fdt, nodename, "reg", 137 0x0, memmap[SPIKE_CLINT].base, 138 0x0, memmap[SPIKE_CLINT].size); 139 qemu_fdt_setprop(fdt, nodename, "interrupts-extended", 140 cells, s->soc.num_harts * sizeof(uint32_t) * 4); 141 g_free(cells); 142 g_free(nodename); 143 144 if (cmdline) { 145 qemu_fdt_add_subnode(fdt, "/chosen"); 146 qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline); 147 } 148 } 149 150 static void spike_board_init(MachineState *machine) 151 { 152 const struct MemmapEntry *memmap = spike_memmap; 153 154 SpikeState *s = g_new0(SpikeState, 1); 155 MemoryRegion *system_memory = get_system_memory(); 156 MemoryRegion *main_mem = g_new(MemoryRegion, 1); 157 MemoryRegion *mask_rom = g_new(MemoryRegion, 1); 158 int i; 159 unsigned int smp_cpus = machine->smp.cpus; 160 161 /* Initialize SOC */ 162 object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc), 163 TYPE_RISCV_HART_ARRAY, &error_abort, NULL); 164 object_property_set_str(OBJECT(&s->soc), machine->cpu_type, "cpu-type", 165 &error_abort); 166 object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts", 167 &error_abort); 168 object_property_set_bool(OBJECT(&s->soc), true, "realized", 169 &error_abort); 170 171 /* register system main memory (actual RAM) */ 172 memory_region_init_ram(main_mem, NULL, "riscv.spike.ram", 173 machine->ram_size, &error_fatal); 174 memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base, 175 main_mem); 176 177 /* create device tree */ 178 create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline); 179 180 /* boot rom */ 181 memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom", 182 memmap[SPIKE_MROM].size, &error_fatal); 183 memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base, 184 mask_rom); 185 186 if (machine->kernel_filename) { 187 riscv_load_kernel(machine->kernel_filename, htif_symbol_callback); 188 } 189 190 /* reset vector */ 191 uint32_t reset_vec[8] = { 192 0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */ 193 0x02028593, /* addi a1, t0, %pcrel_lo(1b) */ 194 0xf1402573, /* csrr a0, mhartid */ 195 #if defined(TARGET_RISCV32) 196 0x0182a283, /* lw t0, 24(t0) */ 197 #elif defined(TARGET_RISCV64) 198 0x0182b283, /* ld t0, 24(t0) */ 199 #endif 200 0x00028067, /* jr t0 */ 201 0x00000000, 202 memmap[SPIKE_DRAM].base, /* start: .dword DRAM_BASE */ 203 0x00000000, 204 /* dtb: */ 205 }; 206 207 /* copy in the reset vector in little_endian byte order */ 208 for (i = 0; i < sizeof(reset_vec) >> 2; i++) { 209 reset_vec[i] = cpu_to_le32(reset_vec[i]); 210 } 211 rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec), 212 memmap[SPIKE_MROM].base, &address_space_memory); 213 214 /* copy in the device tree */ 215 if (fdt_pack(s->fdt) || fdt_totalsize(s->fdt) > 216 memmap[SPIKE_MROM].size - sizeof(reset_vec)) { 217 error_report("not enough space to store device-tree"); 218 exit(1); 219 } 220 qemu_fdt_dumpdtb(s->fdt, fdt_totalsize(s->fdt)); 221 rom_add_blob_fixed_as("mrom.fdt", s->fdt, fdt_totalsize(s->fdt), 222 memmap[SPIKE_MROM].base + sizeof(reset_vec), 223 &address_space_memory); 224 225 /* initialize HTIF using symbols found in load_kernel */ 226 htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0)); 227 228 /* Core Local Interruptor (timer and IPI) */ 229 sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size, 230 smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE, 231 false); 232 } 233 234 static void spike_v1_10_0_board_init(MachineState *machine) 235 { 236 const struct MemmapEntry *memmap = spike_memmap; 237 238 SpikeState *s = g_new0(SpikeState, 1); 239 MemoryRegion *system_memory = get_system_memory(); 240 MemoryRegion *main_mem = g_new(MemoryRegion, 1); 241 MemoryRegion *mask_rom = g_new(MemoryRegion, 1); 242 int i; 243 unsigned int smp_cpus = machine->smp.cpus; 244 245 if (!qtest_enabled()) { 246 info_report("The Spike v1.10.0 machine has been deprecated. " 247 "Please use the generic spike machine and specify the ISA " 248 "versions using -cpu."); 249 } 250 251 /* Initialize SOC */ 252 object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc), 253 TYPE_RISCV_HART_ARRAY, &error_abort, NULL); 254 object_property_set_str(OBJECT(&s->soc), SPIKE_V1_10_0_CPU, "cpu-type", 255 &error_abort); 256 object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts", 257 &error_abort); 258 object_property_set_bool(OBJECT(&s->soc), true, "realized", 259 &error_abort); 260 261 /* register system main memory (actual RAM) */ 262 memory_region_init_ram(main_mem, NULL, "riscv.spike.ram", 263 machine->ram_size, &error_fatal); 264 memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base, 265 main_mem); 266 267 /* create device tree */ 268 create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline); 269 270 /* boot rom */ 271 memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom", 272 memmap[SPIKE_MROM].size, &error_fatal); 273 memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base, 274 mask_rom); 275 276 if (machine->kernel_filename) { 277 riscv_load_kernel(machine->kernel_filename, htif_symbol_callback); 278 } 279 280 /* reset vector */ 281 uint32_t reset_vec[8] = { 282 0x00000297, /* 1: auipc t0, %pcrel_hi(dtb) */ 283 0x02028593, /* addi a1, t0, %pcrel_lo(1b) */ 284 0xf1402573, /* csrr a0, mhartid */ 285 #if defined(TARGET_RISCV32) 286 0x0182a283, /* lw t0, 24(t0) */ 287 #elif defined(TARGET_RISCV64) 288 0x0182b283, /* ld t0, 24(t0) */ 289 #endif 290 0x00028067, /* jr t0 */ 291 0x00000000, 292 memmap[SPIKE_DRAM].base, /* start: .dword DRAM_BASE */ 293 0x00000000, 294 /* dtb: */ 295 }; 296 297 /* copy in the reset vector in little_endian byte order */ 298 for (i = 0; i < sizeof(reset_vec) >> 2; i++) { 299 reset_vec[i] = cpu_to_le32(reset_vec[i]); 300 } 301 rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec), 302 memmap[SPIKE_MROM].base, &address_space_memory); 303 304 /* copy in the device tree */ 305 if (fdt_pack(s->fdt) || fdt_totalsize(s->fdt) > 306 memmap[SPIKE_MROM].size - sizeof(reset_vec)) { 307 error_report("not enough space to store device-tree"); 308 exit(1); 309 } 310 qemu_fdt_dumpdtb(s->fdt, fdt_totalsize(s->fdt)); 311 rom_add_blob_fixed_as("mrom.fdt", s->fdt, fdt_totalsize(s->fdt), 312 memmap[SPIKE_MROM].base + sizeof(reset_vec), 313 &address_space_memory); 314 315 /* initialize HTIF using symbols found in load_kernel */ 316 htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0)); 317 318 /* Core Local Interruptor (timer and IPI) */ 319 sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size, 320 smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE, 321 false); 322 } 323 324 static void spike_v1_09_1_board_init(MachineState *machine) 325 { 326 const struct MemmapEntry *memmap = spike_memmap; 327 328 SpikeState *s = g_new0(SpikeState, 1); 329 MemoryRegion *system_memory = get_system_memory(); 330 MemoryRegion *main_mem = g_new(MemoryRegion, 1); 331 MemoryRegion *mask_rom = g_new(MemoryRegion, 1); 332 int i; 333 unsigned int smp_cpus = machine->smp.cpus; 334 335 if (!qtest_enabled()) { 336 info_report("The Spike v1.09.1 machine has been deprecated. " 337 "Please use the generic spike machine and specify the ISA " 338 "versions using -cpu."); 339 } 340 341 /* Initialize SOC */ 342 object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc), 343 TYPE_RISCV_HART_ARRAY, &error_abort, NULL); 344 object_property_set_str(OBJECT(&s->soc), SPIKE_V1_09_1_CPU, "cpu-type", 345 &error_abort); 346 object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts", 347 &error_abort); 348 object_property_set_bool(OBJECT(&s->soc), true, "realized", 349 &error_abort); 350 351 /* register system main memory (actual RAM) */ 352 memory_region_init_ram(main_mem, NULL, "riscv.spike.ram", 353 machine->ram_size, &error_fatal); 354 memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base, 355 main_mem); 356 357 /* boot rom */ 358 memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom", 359 memmap[SPIKE_MROM].size, &error_fatal); 360 memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base, 361 mask_rom); 362 363 if (machine->kernel_filename) { 364 riscv_load_kernel(machine->kernel_filename, htif_symbol_callback); 365 } 366 367 /* reset vector */ 368 uint32_t reset_vec[8] = { 369 0x297 + memmap[SPIKE_DRAM].base - memmap[SPIKE_MROM].base, /* lui */ 370 0x00028067, /* jump to DRAM_BASE */ 371 0x00000000, /* reserved */ 372 memmap[SPIKE_MROM].base + sizeof(reset_vec), /* config string pointer */ 373 0, 0, 0, 0 /* trap vector */ 374 }; 375 376 /* part one of config string - before memory size specified */ 377 const char *config_string_tmpl = 378 "platform {\n" 379 " vendor ucb;\n" 380 " arch spike;\n" 381 "};\n" 382 "rtc {\n" 383 " addr 0x%" PRIx64 "x;\n" 384 "};\n" 385 "ram {\n" 386 " 0 {\n" 387 " addr 0x%" PRIx64 "x;\n" 388 " size 0x%" PRIx64 "x;\n" 389 " };\n" 390 "};\n" 391 "core {\n" 392 " 0" " {\n" 393 " " "0 {\n" 394 " isa %s;\n" 395 " timecmp 0x%" PRIx64 "x;\n" 396 " ipi 0x%" PRIx64 "x;\n" 397 " };\n" 398 " };\n" 399 "};\n"; 400 401 /* build config string with supplied memory size */ 402 char *isa = riscv_isa_string(&s->soc.harts[0]); 403 char *config_string = g_strdup_printf(config_string_tmpl, 404 (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIME_BASE, 405 (uint64_t)memmap[SPIKE_DRAM].base, 406 (uint64_t)ram_size, isa, 407 (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIMECMP_BASE, 408 (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_SIP_BASE); 409 g_free(isa); 410 size_t config_string_len = strlen(config_string); 411 412 /* copy in the reset vector in little_endian byte order */ 413 for (i = 0; i < sizeof(reset_vec) >> 2; i++) { 414 reset_vec[i] = cpu_to_le32(reset_vec[i]); 415 } 416 rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec), 417 memmap[SPIKE_MROM].base, &address_space_memory); 418 419 /* copy in the config string */ 420 rom_add_blob_fixed_as("mrom.reset", config_string, config_string_len, 421 memmap[SPIKE_MROM].base + sizeof(reset_vec), 422 &address_space_memory); 423 424 /* initialize HTIF using symbols found in load_kernel */ 425 htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0)); 426 427 /* Core Local Interruptor (timer and IPI) */ 428 sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size, 429 smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE, 430 false); 431 432 g_free(config_string); 433 } 434 435 static void spike_v1_09_1_machine_init(MachineClass *mc) 436 { 437 mc->desc = "RISC-V Spike Board (Privileged ISA v1.9.1)"; 438 mc->init = spike_v1_09_1_board_init; 439 mc->max_cpus = 1; 440 } 441 442 static void spike_v1_10_0_machine_init(MachineClass *mc) 443 { 444 mc->desc = "RISC-V Spike Board (Privileged ISA v1.10)"; 445 mc->init = spike_v1_10_0_board_init; 446 mc->max_cpus = 1; 447 } 448 449 static void spike_machine_init(MachineClass *mc) 450 { 451 mc->desc = "RISC-V Spike Board"; 452 mc->init = spike_board_init; 453 mc->max_cpus = 1; 454 mc->is_default = true; 455 mc->default_cpu_type = SPIKE_V1_10_0_CPU; 456 } 457 458 DEFINE_MACHINE("spike_v1.9.1", spike_v1_09_1_machine_init) 459 DEFINE_MACHINE("spike_v1.10", spike_v1_10_0_machine_init) 460 DEFINE_MACHINE("spike", spike_machine_init) 461