hw/riscv/spike.c

   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/hw.h"
  31 #include "hw/boards.h"
  32 #include "hw/loader.h"
  33 #include "hw/sysbus.h"
  34 #include "target/riscv/cpu.h"
  35 #include "hw/riscv/riscv_htif.h"
  36 #include "hw/riscv/riscv_hart.h"
  37 #include "hw/riscv/sifive_clint.h"
  38 #include "hw/riscv/spike.h"
  39 #include "chardev/char.h"
  40 #include "sysemu/arch_init.h"
  41 #include "sysemu/device_tree.h"
  42 #include "exec/address-spaces.h"
  43 #include "elf.h"
  44
  45 #include <libfdt.h>
  46
  47 static const struct MemmapEntry {
  48     hwaddr base;
  49     hwaddr size;
  50 } spike_memmap[] = {
  51     [SPIKE_MROM] =     {     0x1000,    0x11000 },
  52     [SPIKE_CLINT] =    {  0x2000000,    0x10000 },
  53     [SPIKE_DRAM] =     { 0x80000000,        0x0 },
  54 };
  55
  56 static target_ulong load_kernel(const char *kernel_filename)
  57 {
  58     uint64_t kernel_entry, kernel_high;
  59
  60     if (load_elf_ram_sym(kernel_filename, NULL, NULL, NULL,
  61             &kernel_entry, NULL, &kernel_high, 0, EM_RISCV, 1, 0,
  62             NULL, true, htif_symbol_callback) < 0) {
  63         error_report("could not load kernel '%s'", kernel_filename);
  64         exit(1);
  65     }
  66     return kernel_entry;
  67 }
  68
  69 static void create_fdt(SpikeState *s, const struct MemmapEntry *memmap,
  70     uint64_t mem_size, const char *cmdline)
  71 {
  72     void *fdt;
  73     int cpu;
  74     uint32_t *cells;
  75     char *nodename;
  76
  77     fdt = s->fdt = create_device_tree(&s->fdt_size);
  78     if (!fdt) {
  79         error_report("create_device_tree() failed");
  80         exit(1);
  81     }
  82
  83     qemu_fdt_setprop_string(fdt, "/", "model", "ucbbar,spike-bare,qemu");
  84     qemu_fdt_setprop_string(fdt, "/", "compatible", "ucbbar,spike-bare-dev");
  85     qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x2);
  86     qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
  87
  88     qemu_fdt_add_subnode(fdt, "/htif");
  89     qemu_fdt_setprop_string(fdt, "/htif", "compatible", "ucb,htif0");
  90
  91     qemu_fdt_add_subnode(fdt, "/soc");
  92     qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
  93     qemu_fdt_setprop_string(fdt, "/soc", "compatible", "simple-bus");
  94     qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2);
  95     qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
  96
  97     nodename = g_strdup_printf("/memory@%lx",
  98         (long)memmap[SPIKE_DRAM].base);
  99     qemu_fdt_add_subnode(fdt, nodename);
 100     qemu_fdt_setprop_cells(fdt, nodename, "reg",
 101         memmap[SPIKE_DRAM].base >> 32, memmap[SPIKE_DRAM].base,
 102         mem_size >> 32, mem_size);
 103     qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
 104     g_free(nodename);
 105
 106     qemu_fdt_add_subnode(fdt, "/cpus");
 107     qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency",
 108         SIFIVE_CLINT_TIMEBASE_FREQ);
 109     qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
 110     qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
 111
 112     for (cpu = s->soc.num_harts - 1; cpu >= 0; cpu--) {
 113         nodename = g_strdup_printf("/cpus/cpu@%d", cpu);
 114         char *intc = g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
 115         char *isa = riscv_isa_string(&s->soc.harts[cpu]);
 116         qemu_fdt_add_subnode(fdt, nodename);
 117         qemu_fdt_setprop_cell(fdt, nodename, "clock-frequency",
 118                               SPIKE_CLOCK_FREQ);
 119         qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48");
 120         qemu_fdt_setprop_string(fdt, nodename, "riscv,isa", isa);
 121         qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv");
 122         qemu_fdt_setprop_string(fdt, nodename, "status", "okay");
 123         qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu);
 124         qemu_fdt_setprop_string(fdt, nodename, "device_type", "cpu");
 125         qemu_fdt_add_subnode(fdt, intc);
 126         qemu_fdt_setprop_cell(fdt, intc, "phandle", 1);
 127         qemu_fdt_setprop_cell(fdt, intc, "linux,phandle", 1);
 128         qemu_fdt_setprop_string(fdt, intc, "compatible", "riscv,cpu-intc");
 129         qemu_fdt_setprop(fdt, intc, "interrupt-controller", NULL, 0);
 130         qemu_fdt_setprop_cell(fdt, intc, "#interrupt-cells", 1);
 131         g_free(isa);
 132         g_free(intc);
 133         g_free(nodename);
 134     }
 135
 136     cells =  g_new0(uint32_t, s->soc.num_harts * 4);
 137     for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
 138         nodename =
 139             g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
 140         uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
 141         cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
 142         cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
 143         cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
 144         cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
 145         g_free(nodename);
 146     }
 147     nodename = g_strdup_printf("/soc/clint@%lx",
 148         (long)memmap[SPIKE_CLINT].base);
 149     qemu_fdt_add_subnode(fdt, nodename);
 150     qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0");
 151     qemu_fdt_setprop_cells(fdt, nodename, "reg",
 152         0x0, memmap[SPIKE_CLINT].base,
 153         0x0, memmap[SPIKE_CLINT].size);
 154     qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
 155         cells, s->soc.num_harts * sizeof(uint32_t) * 4);
 156     g_free(cells);
 157     g_free(nodename);
 158
 159     if (cmdline) {
 160         qemu_fdt_add_subnode(fdt, "/chosen");
 161         qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
 162     }
 163  }
 164
 165 static void spike_v1_10_0_board_init(MachineState *machine)
 166 {
 167     const struct MemmapEntry *memmap = spike_memmap;
 168
 169     SpikeState *s = g_new0(SpikeState, 1);
 170     MemoryRegion *system_memory = get_system_memory();
 171     MemoryRegion *main_mem = g_new(MemoryRegion, 1);
 172     MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
 173     int i;
 174
 175     /* Initialize SOC */
 176     object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
 177                             TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
 178     object_property_set_str(OBJECT(&s->soc), SPIKE_V1_10_0_CPU, "cpu-type",
 179                             &error_abort);
 180     object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
 181                             &error_abort);
 182     object_property_set_bool(OBJECT(&s->soc), true, "realized",
 183                             &error_abort);
 184
 185     /* register system main memory (actual RAM) */
 186     memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
 187                            machine->ram_size, &error_fatal);
 188     memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
 189         main_mem);
 190
 191     /* create device tree */
 192     create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
 193
 194     /* boot rom */
 195     memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom",
 196                            memmap[SPIKE_MROM].size, &error_fatal);
 197     memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base,
 198                                 mask_rom);
 199
 200     if (machine->kernel_filename) {
 201         load_kernel(machine->kernel_filename);
 202     }
 203
 204     /* reset vector */
 205     uint32_t reset_vec[8] = {
 206         0x00000297,                  /* 1:  auipc  t0, %pcrel_hi(dtb) */
 207         0x02028593,                  /*     addi   a1, t0, %pcrel_lo(1b) */
 208         0xf1402573,                  /*     csrr   a0, mhartid  */
 209 #if defined(TARGET_RISCV32)
 210         0x0182a283,                  /*     lw     t0, 24(t0) */
 211 #elif defined(TARGET_RISCV64)
 212         0x0182b283,                  /*     ld     t0, 24(t0) */
 213 #endif
 214         0x00028067,                  /*     jr     t0 */
 215         0x00000000,
 216         memmap[SPIKE_DRAM].base,     /* start: .dword DRAM_BASE */
 217         0x00000000,
 218                                      /* dtb: */
 219     };
 220
 221     /* copy in the reset vector in little_endian byte order */
 222     for (i = 0; i < sizeof(reset_vec) >> 2; i++) {
 223         reset_vec[i] = cpu_to_le32(reset_vec[i]);
 224     }
 225     rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec),
 226                           memmap[SPIKE_MROM].base, &address_space_memory);
 227
 228     /* copy in the device tree */
 229     if (fdt_pack(s->fdt) || fdt_totalsize(s->fdt) >
 230             memmap[SPIKE_MROM].size - sizeof(reset_vec)) {
 231         error_report("not enough space to store device-tree");
 232         exit(1);
 233     }
 234     qemu_fdt_dumpdtb(s->fdt, fdt_totalsize(s->fdt));
 235     rom_add_blob_fixed_as("mrom.fdt", s->fdt, fdt_totalsize(s->fdt),
 236                           memmap[SPIKE_MROM].base + sizeof(reset_vec),
 237                           &address_space_memory);
 238
 239     /* initialize HTIF using symbols found in load_kernel */
 240     htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
 241
 242     /* Core Local Interruptor (timer and IPI) */
 243     sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
 244         smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);
 245 }
 246
 247 static void spike_v1_09_1_board_init(MachineState *machine)
 248 {
 249     const struct MemmapEntry *memmap = spike_memmap;
 250
 251     SpikeState *s = g_new0(SpikeState, 1);
 252     MemoryRegion *system_memory = get_system_memory();
 253     MemoryRegion *main_mem = g_new(MemoryRegion, 1);
 254     MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
 255     int i;
 256
 257     /* Initialize SOC */
 258     object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
 259                             TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
 260     object_property_set_str(OBJECT(&s->soc), SPIKE_V1_09_1_CPU, "cpu-type",
 261                             &error_abort);
 262     object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
 263                             &error_abort);
 264     object_property_set_bool(OBJECT(&s->soc), true, "realized",
 265                             &error_abort);
 266
 267     /* register system main memory (actual RAM) */
 268     memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
 269                            machine->ram_size, &error_fatal);
 270     memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
 271         main_mem);
 272
 273     /* boot rom */
 274     memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom",
 275                            memmap[SPIKE_MROM].size, &error_fatal);
 276     memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base,
 277                                 mask_rom);
 278
 279     if (machine->kernel_filename) {
 280         load_kernel(machine->kernel_filename);
 281     }
 282
 283     /* reset vector */
 284     uint32_t reset_vec[8] = {
 285         0x297 + memmap[SPIKE_DRAM].base - memmap[SPIKE_MROM].base, /* lui */
 286         0x00028067,                   /* jump to DRAM_BASE */
 287         0x00000000,                   /* reserved */
 288         memmap[SPIKE_MROM].base + sizeof(reset_vec), /* config string pointer */
 289         0, 0, 0, 0                    /* trap vector */
 290     };
 291
 292     /* part one of config string - before memory size specified */
 293     const char *config_string_tmpl =
 294         "platform {\n"
 295         "  vendor ucb;\n"
 296         "  arch spike;\n"
 297         "};\n"
 298         "rtc {\n"
 299         "  addr 0x%" PRIx64 "x;\n"
 300         "};\n"
 301         "ram {\n"
 302         "  0 {\n"
 303         "    addr 0x%" PRIx64 "x;\n"
 304         "    size 0x%" PRIx64 "x;\n"
 305         "  };\n"
 306         "};\n"
 307         "core {\n"
 308         "  0" " {\n"
 309         "    " "0 {\n"
 310         "      isa %s;\n"
 311         "      timecmp 0x%" PRIx64 "x;\n"
 312         "      ipi 0x%" PRIx64 "x;\n"
 313         "    };\n"
 314         "  };\n"
 315         "};\n";
 316
 317     /* build config string with supplied memory size */
 318     char *isa = riscv_isa_string(&s->soc.harts[0]);
 319     char *config_string = g_strdup_printf(config_string_tmpl,
 320         (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIME_BASE,
 321         (uint64_t)memmap[SPIKE_DRAM].base,
 322         (uint64_t)ram_size, isa,
 323         (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIMECMP_BASE,
 324         (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_SIP_BASE);
 325     g_free(isa);
 326     size_t config_string_len = strlen(config_string);
 327
 328     /* copy in the reset vector in little_endian byte order */
 329     for (i = 0; i < sizeof(reset_vec) >> 2; i++) {
 330         reset_vec[i] = cpu_to_le32(reset_vec[i]);
 331     }
 332     rom_add_blob_fixed_as("mrom.reset", reset_vec, sizeof(reset_vec),
 333                           memmap[SPIKE_MROM].base, &address_space_memory);
 334
 335     /* copy in the config string */
 336     rom_add_blob_fixed_as("mrom.reset", config_string, config_string_len,
 337                           memmap[SPIKE_MROM].base + sizeof(reset_vec),
 338                           &address_space_memory);
 339
 340     /* initialize HTIF using symbols found in load_kernel */
 341     htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
 342
 343     /* Core Local Interruptor (timer and IPI) */
 344     sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
 345         smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);
 346
 347     g_free(config_string);
 348 }
 349
 350 static void spike_v1_09_1_machine_init(MachineClass *mc)
 351 {
 352     mc->desc = "RISC-V Spike Board (Privileged ISA v1.9.1)";
 353     mc->init = spike_v1_09_1_board_init;
 354     mc->max_cpus = 1;
 355 }
 356
 357 static void spike_v1_10_0_machine_init(MachineClass *mc)
 358 {
 359     mc->desc = "RISC-V Spike Board (Privileged ISA v1.10)";
 360     mc->init = spike_v1_10_0_board_init;
 361     mc->max_cpus = 1;
 362     mc->is_default = 1;
 363 }
 364
 365 DEFINE_MACHINE("spike_v1.9.1", spike_v1_09_1_machine_init)
 366 DEFINE_MACHINE("spike_v1.10", spike_v1_10_0_machine_init)