1 /* 2 * QEMU RISCV Hart Array 3 * 4 * Copyright (c) 2017 SiFive, Inc. 5 * 6 * Holds the state of a heterogenous array of RISC-V harts 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms and conditions of the GNU General Public License, 10 * version 2 or later, as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program. If not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include "qapi/error.h" 23 #include "hw/sysbus.h" 24 #include "target/riscv/cpu.h" 25 #include "hw/riscv/riscv_hart.h" 26 27 static Property riscv_harts_props[] = { 28 DEFINE_PROP_UINT32("num-harts", RISCVHartArrayState, num_harts, 1), 29 DEFINE_PROP_STRING("cpu-type", RISCVHartArrayState, cpu_type), 30 DEFINE_PROP_END_OF_LIST(), 31 }; 32 33 static void riscv_harts_cpu_reset(void *opaque) 34 { 35 RISCVCPU *cpu = opaque; 36 cpu_reset(CPU(cpu)); 37 } 38 39 static void riscv_harts_realize(DeviceState *dev, Error **errp) 40 { 41 RISCVHartArrayState *s = RISCV_HART_ARRAY(dev); 42 Error *err = NULL; 43 int n; 44 45 s->harts = g_new0(RISCVCPU, s->num_harts); 46 47 for (n = 0; n < s->num_harts; n++) { 48 object_initialize_child(OBJECT(s), "harts[*]", &s->harts[n], 49 sizeof(RISCVCPU), s->cpu_type, 50 &error_abort, NULL); 51 s->harts[n].env.mhartid = n; 52 qemu_register_reset(riscv_harts_cpu_reset, &s->harts[n]); 53 object_property_set_bool(OBJECT(&s->harts[n]), true, 54 "realized", &err); 55 if (err) { 56 error_propagate(errp, err); 57 return; 58 } 59 } 60 } 61 62 static void riscv_harts_class_init(ObjectClass *klass, void *data) 63 { 64 DeviceClass *dc = DEVICE_CLASS(klass); 65 66 dc->props = riscv_harts_props; 67 dc->realize = riscv_harts_realize; 68 } 69 70 static const TypeInfo riscv_harts_info = { 71 .name = TYPE_RISCV_HART_ARRAY, 72 .parent = TYPE_SYS_BUS_DEVICE, 73 .instance_size = sizeof(RISCVHartArrayState), 74 .class_init = riscv_harts_class_init, 75 }; 76 77 static void riscv_harts_register_types(void) 78 { 79 type_register_static(&riscv_harts_info); 80 } 81 82 type_init(riscv_harts_register_types) 83