1 /* 2 * Coherent Processing System emulation. 3 * 4 * Copyright (c) 2016 Imagination Technologies 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qapi/error.h" 22 #include "qemu/module.h" 23 #include "hw/mips/cps.h" 24 #include "hw/mips/mips.h" 25 #include "hw/qdev-clock.h" 26 #include "hw/qdev-properties.h" 27 #include "hw/mips/cpudevs.h" 28 #include "sysemu/kvm.h" 29 #include "sysemu/reset.h" 30 31 qemu_irq get_cps_irq(MIPSCPSState *s, int pin_number) 32 { 33 assert(pin_number < s->num_irq); 34 return s->gic.irq_state[pin_number].irq; 35 } 36 37 static void mips_cps_init(Object *obj) 38 { 39 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 40 MIPSCPSState *s = MIPS_CPS(obj); 41 42 s->clock = qdev_init_clock_in(DEVICE(obj), "clk-in", NULL, NULL, 0); 43 /* 44 * Cover entire address space as there do not seem to be any 45 * constraints for the base address of CPC and GIC. 46 */ 47 memory_region_init(&s->container, obj, "mips-cps-container", UINT64_MAX); 48 sysbus_init_mmio(sbd, &s->container); 49 } 50 51 static void main_cpu_reset(void *opaque) 52 { 53 MIPSCPU *cpu = opaque; 54 CPUState *cs = CPU(cpu); 55 56 cpu_reset(cs); 57 } 58 59 static bool cpu_mips_itu_supported(CPUMIPSState *env) 60 { 61 bool is_mt = (env->CP0_Config5 & (1 << CP0C5_VP)) || ase_mt_available(env); 62 63 return is_mt && !kvm_enabled(); 64 } 65 66 static void mips_cps_realize(DeviceState *dev, Error **errp) 67 { 68 MIPSCPSState *s = MIPS_CPS(dev); 69 target_ulong gcr_base; 70 bool itu_present = false; 71 72 if (!clock_get(s->clock)) { 73 error_setg(errp, "CPS input clock is not connected to an output clock"); 74 return; 75 } 76 77 for (int i = 0; i < s->num_vp; i++) { 78 MIPSCPU *cpu = MIPS_CPU(object_new(s->cpu_type)); 79 CPUMIPSState *env = &cpu->env; 80 81 /* All VPs are halted on reset. Leave powering up to CPC. */ 82 if (!object_property_set_bool(OBJECT(cpu), "start-powered-off", true, 83 errp)) { 84 return; 85 } 86 /* All cores use the same clock tree */ 87 qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock); 88 89 if (!qdev_realize_and_unref(DEVICE(cpu), NULL, errp)) { 90 return; 91 } 92 93 /* Init internal devices */ 94 cpu_mips_irq_init_cpu(cpu); 95 cpu_mips_clock_init(cpu); 96 97 if (cpu_mips_itu_supported(env)) { 98 itu_present = true; 99 /* Attach ITC Tag to the VP */ 100 env->itc_tag = mips_itu_get_tag_region(&s->itu); 101 env->itu = &s->itu; 102 } 103 qemu_register_reset(main_cpu_reset, cpu); 104 } 105 106 /* Inter-Thread Communication Unit */ 107 if (itu_present) { 108 object_initialize_child(OBJECT(dev), "itu", &s->itu, TYPE_MIPS_ITU); 109 object_property_set_link(OBJECT(&s->itu), "cpu[0]", 110 OBJECT(first_cpu), &error_abort); 111 object_property_set_uint(OBJECT(&s->itu), "num-fifo", 16, 112 &error_abort); 113 object_property_set_uint(OBJECT(&s->itu), "num-semaphores", 16, 114 &error_abort); 115 if (!sysbus_realize(SYS_BUS_DEVICE(&s->itu), errp)) { 116 return; 117 } 118 119 memory_region_add_subregion(&s->container, 0, 120 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->itu), 0)); 121 } 122 123 /* Cluster Power Controller */ 124 object_initialize_child(OBJECT(dev), "cpc", &s->cpc, TYPE_MIPS_CPC); 125 object_property_set_uint(OBJECT(&s->cpc), "num-vp", s->num_vp, 126 &error_abort); 127 object_property_set_int(OBJECT(&s->cpc), "vp-start-running", 1, 128 &error_abort); 129 if (!sysbus_realize(SYS_BUS_DEVICE(&s->cpc), errp)) { 130 return; 131 } 132 133 memory_region_add_subregion(&s->container, 0, 134 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->cpc), 0)); 135 136 /* Global Interrupt Controller */ 137 object_initialize_child(OBJECT(dev), "gic", &s->gic, TYPE_MIPS_GIC); 138 object_property_set_uint(OBJECT(&s->gic), "num-vp", s->num_vp, 139 &error_abort); 140 object_property_set_uint(OBJECT(&s->gic), "num-irq", 128, 141 &error_abort); 142 if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic), errp)) { 143 return; 144 } 145 146 memory_region_add_subregion(&s->container, 0, 147 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gic), 0)); 148 149 /* Global Configuration Registers */ 150 gcr_base = MIPS_CPU(first_cpu)->env.CP0_CMGCRBase << 4; 151 152 object_initialize_child(OBJECT(dev), "gcr", &s->gcr, TYPE_MIPS_GCR); 153 object_property_set_uint(OBJECT(&s->gcr), "num-vp", s->num_vp, 154 &error_abort); 155 object_property_set_int(OBJECT(&s->gcr), "gcr-rev", 0x800, 156 &error_abort); 157 object_property_set_int(OBJECT(&s->gcr), "gcr-base", gcr_base, 158 &error_abort); 159 object_property_set_link(OBJECT(&s->gcr), "gic", OBJECT(&s->gic.mr), 160 &error_abort); 161 object_property_set_link(OBJECT(&s->gcr), "cpc", OBJECT(&s->cpc.mr), 162 &error_abort); 163 if (!sysbus_realize(SYS_BUS_DEVICE(&s->gcr), errp)) { 164 return; 165 } 166 167 memory_region_add_subregion(&s->container, gcr_base, 168 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gcr), 0)); 169 } 170 171 static Property mips_cps_properties[] = { 172 DEFINE_PROP_UINT32("num-vp", MIPSCPSState, num_vp, 1), 173 DEFINE_PROP_UINT32("num-irq", MIPSCPSState, num_irq, 256), 174 DEFINE_PROP_STRING("cpu-type", MIPSCPSState, cpu_type), 175 DEFINE_PROP_END_OF_LIST() 176 }; 177 178 static void mips_cps_class_init(ObjectClass *klass, void *data) 179 { 180 DeviceClass *dc = DEVICE_CLASS(klass); 181 182 dc->realize = mips_cps_realize; 183 device_class_set_props(dc, mips_cps_properties); 184 } 185 186 static const TypeInfo mips_cps_info = { 187 .name = TYPE_MIPS_CPS, 188 .parent = TYPE_SYS_BUS_DEVICE, 189 .instance_size = sizeof(MIPSCPSState), 190 .instance_init = mips_cps_init, 191 .class_init = mips_cps_class_init, 192 }; 193 194 static void mips_cps_register_types(void) 195 { 196 type_register_static(&mips_cps_info); 197 } 198 199 type_init(mips_cps_register_types) 200