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/boards.h"
  31 #include "hw/loader.h"
  32 #include "hw/sysbus.h"
  33 #include "target/riscv/cpu.h"
  34 #include "hw/riscv/riscv_hart.h"
  35 #include "hw/riscv/spike.h"
  36 #include "hw/riscv/boot.h"
  37 #include "hw/riscv/numa.h"
  38 #include "hw/char/riscv_htif.h"
  39 #include "hw/intc/sifive_clint.h"
  40 #include "chardev/char.h"
  41 #include "sysemu/arch_init.h"
  42 #include "sysemu/device_tree.h"
  43 #include "sysemu/qtest.h"
  44 #include "sysemu/sysemu.h"
  45
  46 /*
  47  * Not like other RISC-V machines that use plain binary bios images,
  48  * keeping ELF files here was intentional because BIN files don't work
  49  * for the Spike machine as HTIF emulation depends on ELF parsing.
  50  */
  51 #if defined(TARGET_RISCV32)
  52 # define BIOS_FILENAME "opensbi-riscv32-generic-fw_dynamic.elf"
  53 #else
  54 # define BIOS_FILENAME "opensbi-riscv64-generic-fw_dynamic.elf"
  55 #endif
  56
  57 static const struct MemmapEntry {
  58     hwaddr base;
  59     hwaddr size;
  60 } spike_memmap[] = {
  61     [SPIKE_MROM] =     {     0x1000,     0xf000 },
  62     [SPIKE_CLINT] =    {  0x2000000,    0x10000 },
  63     [SPIKE_DRAM] =     { 0x80000000,        0x0 },
  64 };
  65
  66 static void create_fdt(SpikeState *s, const struct MemmapEntry *memmap,
  67     uint64_t mem_size, const char *cmdline)
  68 {
  69     void *fdt;
  70     uint64_t addr, size;
  71     unsigned long clint_addr;
  72     int cpu, socket;
  73     MachineState *mc = MACHINE(s);
  74     uint32_t *clint_cells;
  75     uint32_t cpu_phandle, intc_phandle, phandle = 1;
  76     char *name, *mem_name, *clint_name, *clust_name;
  77     char *core_name, *cpu_name, *intc_name;
  78
  79     fdt = s->fdt = create_device_tree(&s->fdt_size);
  80     if (!fdt) {
  81         error_report("create_device_tree() failed");
  82         exit(1);
  83     }
  84
  85     qemu_fdt_setprop_string(fdt, "/", "model", "ucbbar,spike-bare,qemu");
  86     qemu_fdt_setprop_string(fdt, "/", "compatible", "ucbbar,spike-bare-dev");
  87     qemu_fdt_setprop_cell(fdt, "/", "#size-cells", 0x2);
  88     qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 0x2);
  89
  90     qemu_fdt_add_subnode(fdt, "/htif");
  91     qemu_fdt_setprop_string(fdt, "/htif", "compatible", "ucb,htif0");
  92
  93     qemu_fdt_add_subnode(fdt, "/soc");
  94     qemu_fdt_setprop(fdt, "/soc", "ranges", NULL, 0);
  95     qemu_fdt_setprop_string(fdt, "/soc", "compatible", "simple-bus");
  96     qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2);
  97     qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
  98
  99     qemu_fdt_add_subnode(fdt, "/cpus");
 100     qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency",
 101         SIFIVE_CLINT_TIMEBASE_FREQ);
 102     qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
 103     qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
 104     qemu_fdt_add_subnode(fdt, "/cpus/cpu-map");
 105
 106     for (socket = (riscv_socket_count(mc) - 1); socket >= 0; socket--) {
 107         clust_name = g_strdup_printf("/cpus/cpu-map/cluster%d", socket);
 108         qemu_fdt_add_subnode(fdt, clust_name);
 109
 110         clint_cells =  g_new0(uint32_t, s->soc[socket].num_harts * 4);
 111
 112         for (cpu = s->soc[socket].num_harts - 1; cpu >= 0; cpu--) {
 113             cpu_phandle = phandle++;
 114
 115             cpu_name = g_strdup_printf("/cpus/cpu@%d",
 116                 s->soc[socket].hartid_base + cpu);
 117             qemu_fdt_add_subnode(fdt, cpu_name);
 118 #if defined(TARGET_RISCV32)
 119             qemu_fdt_setprop_string(fdt, cpu_name, "mmu-type", "riscv,sv32");
 120 #else
 121             qemu_fdt_setprop_string(fdt, cpu_name, "mmu-type", "riscv,sv48");
 122 #endif
 123             name = riscv_isa_string(&s->soc[socket].harts[cpu]);
 124             qemu_fdt_setprop_string(fdt, cpu_name, "riscv,isa", name);
 125             g_free(name);
 126             qemu_fdt_setprop_string(fdt, cpu_name, "compatible", "riscv");
 127             qemu_fdt_setprop_string(fdt, cpu_name, "status", "okay");
 128             qemu_fdt_setprop_cell(fdt, cpu_name, "reg",
 129                 s->soc[socket].hartid_base + cpu);
 130             qemu_fdt_setprop_string(fdt, cpu_name, "device_type", "cpu");
 131             riscv_socket_fdt_write_id(mc, fdt, cpu_name, socket);
 132             qemu_fdt_setprop_cell(fdt, cpu_name, "phandle", cpu_phandle);
 133
 134             intc_name = g_strdup_printf("%s/interrupt-controller", cpu_name);
 135             qemu_fdt_add_subnode(fdt, intc_name);
 136             intc_phandle = phandle++;
 137             qemu_fdt_setprop_cell(fdt, intc_name, "phandle", intc_phandle);
 138             qemu_fdt_setprop_string(fdt, intc_name, "compatible",
 139                 "riscv,cpu-intc");
 140             qemu_fdt_setprop(fdt, intc_name, "interrupt-controller", NULL, 0);
 141             qemu_fdt_setprop_cell(fdt, intc_name, "#interrupt-cells", 1);
 142
 143             clint_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
 144             clint_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
 145             clint_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
 146             clint_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
 147
 148             core_name = g_strdup_printf("%s/core%d", clust_name, cpu);
 149             qemu_fdt_add_subnode(fdt, core_name);
 150             qemu_fdt_setprop_cell(fdt, core_name, "cpu", cpu_phandle);
 151
 152             g_free(core_name);
 153             g_free(intc_name);
 154             g_free(cpu_name);
 155         }
 156
 157         addr = memmap[SPIKE_DRAM].base + riscv_socket_mem_offset(mc, socket);
 158         size = riscv_socket_mem_size(mc, socket);
 159         mem_name = g_strdup_printf("/memory@%lx", (long)addr);
 160         qemu_fdt_add_subnode(fdt, mem_name);
 161         qemu_fdt_setprop_cells(fdt, mem_name, "reg",
 162             addr >> 32, addr, size >> 32, size);
 163         qemu_fdt_setprop_string(fdt, mem_name, "device_type", "memory");
 164         riscv_socket_fdt_write_id(mc, fdt, mem_name, socket);
 165         g_free(mem_name);
 166
 167         clint_addr = memmap[SPIKE_CLINT].base +
 168             (memmap[SPIKE_CLINT].size * socket);
 169         clint_name = g_strdup_printf("/soc/clint@%lx", clint_addr);
 170         qemu_fdt_add_subnode(fdt, clint_name);
 171         qemu_fdt_setprop_string(fdt, clint_name, "compatible", "riscv,clint0");
 172         qemu_fdt_setprop_cells(fdt, clint_name, "reg",
 173             0x0, clint_addr, 0x0, memmap[SPIKE_CLINT].size);
 174         qemu_fdt_setprop(fdt, clint_name, "interrupts-extended",
 175             clint_cells, s->soc[socket].num_harts * sizeof(uint32_t) * 4);
 176         riscv_socket_fdt_write_id(mc, fdt, clint_name, socket);
 177
 178         g_free(clint_name);
 179         g_free(clint_cells);
 180         g_free(clust_name);
 181     }
 182
 183     riscv_socket_fdt_write_distance_matrix(mc, fdt);
 184
 185     if (cmdline) {
 186         qemu_fdt_add_subnode(fdt, "/chosen");
 187         qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
 188     }
 189 }
 190
 191 static void spike_board_init(MachineState *machine)
 192 {
 193     const struct MemmapEntry *memmap = spike_memmap;
 194     SpikeState *s = SPIKE_MACHINE(machine);
 195     MemoryRegion *system_memory = get_system_memory();
 196     MemoryRegion *main_mem = g_new(MemoryRegion, 1);
 197     MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
 198     uint32_t fdt_load_addr;
 199     uint64_t kernel_entry;
 200     char *soc_name;
 201     int i, base_hartid, hart_count;
 202
 203     /* Check socket count limit */
 204     if (SPIKE_SOCKETS_MAX < riscv_socket_count(machine)) {
 205         error_report("number of sockets/nodes should be less than %d",
 206             SPIKE_SOCKETS_MAX);
 207         exit(1);
 208     }
 209
 210     /* Initialize sockets */
 211     for (i = 0; i < riscv_socket_count(machine); i++) {
 212         if (!riscv_socket_check_hartids(machine, i)) {
 213             error_report("discontinuous hartids in socket%d", i);
 214             exit(1);
 215         }
 216
 217         base_hartid = riscv_socket_first_hartid(machine, i);
 218         if (base_hartid < 0) {
 219             error_report("can't find hartid base for socket%d", i);
 220             exit(1);
 221         }
 222
 223         hart_count = riscv_socket_hart_count(machine, i);
 224         if (hart_count < 0) {
 225             error_report("can't find hart count for socket%d", i);
 226             exit(1);
 227         }
 228
 229         soc_name = g_strdup_printf("soc%d", i);
 230         object_initialize_child(OBJECT(machine), soc_name, &s->soc[i],
 231                                 TYPE_RISCV_HART_ARRAY);
 232         g_free(soc_name);
 233         object_property_set_str(OBJECT(&s->soc[i]), "cpu-type",
 234                                 machine->cpu_type, &error_abort);
 235         object_property_set_int(OBJECT(&s->soc[i]), "hartid-base",
 236                                 base_hartid, &error_abort);
 237         object_property_set_int(OBJECT(&s->soc[i]), "num-harts",
 238                                 hart_count, &error_abort);
 239         sysbus_realize(SYS_BUS_DEVICE(&s->soc[i]), &error_abort);
 240
 241         /* Core Local Interruptor (timer and IPI) for each socket */
 242         sifive_clint_create(
 243             memmap[SPIKE_CLINT].base + i * memmap[SPIKE_CLINT].size,
 244             memmap[SPIKE_CLINT].size, base_hartid, hart_count,
 245             SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
 246             SIFIVE_CLINT_TIMEBASE_FREQ, false);
 247     }
 248
 249     /* register system main memory (actual RAM) */
 250     memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
 251                            machine->ram_size, &error_fatal);
 252     memory_region_add_subregion(system_memory, memmap[SPIKE_DRAM].base,
 253         main_mem);
 254
 255     /* create device tree */
 256     create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
 257
 258     /* boot rom */
 259     memory_region_init_rom(mask_rom, NULL, "riscv.spike.mrom",
 260                            memmap[SPIKE_MROM].size, &error_fatal);
 261     memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base,
 262                                 mask_rom);
 263
 264     riscv_find_and_load_firmware(machine, BIOS_FILENAME,
 265                                  memmap[SPIKE_DRAM].base,
 266                                  htif_symbol_callback);
 267
 268     if (machine->kernel_filename) {
 269         kernel_entry = riscv_load_kernel(machine->kernel_filename,
 270                                          htif_symbol_callback);
 271
 272         if (machine->initrd_filename) {
 273             hwaddr start;
 274             hwaddr end = riscv_load_initrd(machine->initrd_filename,
 275                                            machine->ram_size, kernel_entry,
 276                                            &start);
 277             qemu_fdt_setprop_cell(s->fdt, "/chosen",
 278                                   "linux,initrd-start", start);
 279             qemu_fdt_setprop_cell(s->fdt, "/chosen", "linux,initrd-end",
 280                                   end);
 281         }
 282     } else {
 283        /*
 284         * If dynamic firmware is used, it doesn't know where is the next mode
 285         * if kernel argument is not set.
 286         */
 287         kernel_entry = 0;
 288     }
 289
 290     /* Compute the fdt load address in dram */
 291     fdt_load_addr = riscv_load_fdt(memmap[SPIKE_DRAM].base,
 292                                    machine->ram_size, s->fdt);
 293     /* load the reset vector */
 294     riscv_setup_rom_reset_vec(memmap[SPIKE_DRAM].base, memmap[SPIKE_MROM].base,
 295                               memmap[SPIKE_MROM].size, kernel_entry,
 296                               fdt_load_addr, s->fdt);
 297
 298     /* initialize HTIF using symbols found in load_kernel */
 299     htif_mm_init(system_memory, mask_rom,
 300                  &s->soc[0].harts[0].env, serial_hd(0));
 301 }
 302
 303 static void spike_machine_instance_init(Object *obj)
 304 {
 305 }
 306
 307 static void spike_machine_class_init(ObjectClass *oc, void *data)
 308 {
 309     MachineClass *mc = MACHINE_CLASS(oc);
 310
 311     mc->desc = "RISC-V Spike board";
 312     mc->init = spike_board_init;
 313     mc->max_cpus = SPIKE_CPUS_MAX;
 314     mc->is_default = true;
 315     mc->default_cpu_type = SPIKE_V1_10_0_CPU;
 316     mc->possible_cpu_arch_ids = riscv_numa_possible_cpu_arch_ids;
 317     mc->cpu_index_to_instance_props = riscv_numa_cpu_index_to_props;
 318     mc->get_default_cpu_node_id = riscv_numa_get_default_cpu_node_id;
 319     mc->numa_mem_supported = true;
 320 }
 321
 322 static const TypeInfo spike_machine_typeinfo = {
 323     .name       = MACHINE_TYPE_NAME("spike"),
 324     .parent     = TYPE_MACHINE,
 325     .class_init = spike_machine_class_init,
 326     .instance_init = spike_machine_instance_init,
 327     .instance_size = sizeof(SpikeState),
 328 };
 329
 330 static void spike_machine_init_register_types(void)
 331 {
 332     type_register_static(&spike_machine_typeinfo);
 333 }
 334
 335 type_init(spike_machine_init_register_types)