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 "sysemu/kvm.h" 28 #include "sysemu/reset.h" 29 30 qemu_irq get_cps_irq(MIPSCPSState *s, int pin_number) 31 { 32 assert(pin_number < s->num_irq); 33 return s->gic.irq_state[pin_number].irq; 34 } 35 36 static void mips_cps_init(Object *obj) 37 { 38 SysBusDevice *sbd = SYS_BUS_DEVICE(obj); 39 MIPSCPSState *s = MIPS_CPS(obj); 40 41 s->clock = qdev_init_clock_in(DEVICE(obj), "clk-in", NULL, NULL, 0); 42 /* 43 * Cover entire address space as there do not seem to be any 44 * constraints for the base address of CPC and GIC. 45 */ 46 memory_region_init(&s->container, obj, "mips-cps-container", UINT64_MAX); 47 sysbus_init_mmio(sbd, &s->container); 48 } 49 50 static void main_cpu_reset(void *opaque) 51 { 52 MIPSCPU *cpu = opaque; 53 CPUState *cs = CPU(cpu); 54 55 cpu_reset(cs); 56 } 57 58 static bool cpu_mips_itu_supported(CPUMIPSState *env) 59 { 60 bool is_mt = (env->CP0_Config5 & (1 << CP0C5_VP)) || ase_mt_available(env); 61 62 return is_mt && !kvm_enabled(); 63 } 64 65 static void mips_cps_realize(DeviceState *dev, Error **errp) 66 { 67 MIPSCPSState *s = MIPS_CPS(dev); 68 target_ulong gcr_base; 69 bool itu_present = false; 70 71 if (!clock_get(s->clock)) { 72 error_setg(errp, "CPS input clock is not connected to an output clock"); 73 return; 74 } 75 76 for (int i = 0; i < s->num_vp; i++) { 77 MIPSCPU *cpu = MIPS_CPU(object_new(s->cpu_type)); 78 CPUMIPSState *env = &cpu->env; 79 80 /* All VPs are halted on reset. Leave powering up to CPC. */ 81 if (!object_property_set_bool(OBJECT(cpu), "start-powered-off", true, 82 errp)) { 83 return; 84 } 85 /* All cores use the same clock tree */ 86 qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock); 87 88 if (!qdev_realize_and_unref(DEVICE(cpu), NULL, errp)) { 89 return; 90 } 91 92 /* Init internal devices */ 93 cpu_mips_irq_init_cpu(cpu); 94 cpu_mips_clock_init(cpu); 95 96 if (cpu_mips_itu_supported(env)) { 97 itu_present = true; 98 /* Attach ITC Tag to the VP */ 99 env->itc_tag = mips_itu_get_tag_region(&s->itu); 100 env->itu = &s->itu; 101 } 102 qemu_register_reset(main_cpu_reset, cpu); 103 } 104 105 /* Inter-Thread Communication Unit */ 106 if (itu_present) { 107 object_initialize_child(OBJECT(dev), "itu", &s->itu, TYPE_MIPS_ITU); 108 object_property_set_link(OBJECT(&s->itu), "cpu[0]", 109 OBJECT(first_cpu), &error_abort); 110 object_property_set_uint(OBJECT(&s->itu), "num-fifo", 16, 111 &error_abort); 112 object_property_set_uint(OBJECT(&s->itu), "num-semaphores", 16, 113 &error_abort); 114 if (!sysbus_realize(SYS_BUS_DEVICE(&s->itu), errp)) { 115 return; 116 } 117 118 memory_region_add_subregion(&s->container, 0, 119 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->itu), 0)); 120 } 121 122 /* Cluster Power Controller */ 123 object_initialize_child(OBJECT(dev), "cpc", &s->cpc, TYPE_MIPS_CPC); 124 object_property_set_uint(OBJECT(&s->cpc), "num-vp", s->num_vp, 125 &error_abort); 126 object_property_set_int(OBJECT(&s->cpc), "vp-start-running", 1, 127 &error_abort); 128 if (!sysbus_realize(SYS_BUS_DEVICE(&s->cpc), errp)) { 129 return; 130 } 131 132 memory_region_add_subregion(&s->container, 0, 133 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->cpc), 0)); 134 135 /* Global Interrupt Controller */ 136 object_initialize_child(OBJECT(dev), "gic", &s->gic, TYPE_MIPS_GIC); 137 object_property_set_uint(OBJECT(&s->gic), "num-vp", s->num_vp, 138 &error_abort); 139 object_property_set_uint(OBJECT(&s->gic), "num-irq", 128, 140 &error_abort); 141 if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic), errp)) { 142 return; 143 } 144 145 memory_region_add_subregion(&s->container, 0, 146 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gic), 0)); 147 148 /* Global Configuration Registers */ 149 gcr_base = MIPS_CPU(first_cpu)->env.CP0_CMGCRBase << 4; 150 151 object_initialize_child(OBJECT(dev), "gcr", &s->gcr, TYPE_MIPS_GCR); 152 object_property_set_uint(OBJECT(&s->gcr), "num-vp", s->num_vp, 153 &error_abort); 154 object_property_set_int(OBJECT(&s->gcr), "gcr-rev", 0x800, 155 &error_abort); 156 object_property_set_int(OBJECT(&s->gcr), "gcr-base", gcr_base, 157 &error_abort); 158 object_property_set_link(OBJECT(&s->gcr), "gic", OBJECT(&s->gic.mr), 159 &error_abort); 160 object_property_set_link(OBJECT(&s->gcr), "cpc", OBJECT(&s->cpc.mr), 161 &error_abort); 162 if (!sysbus_realize(SYS_BUS_DEVICE(&s->gcr), errp)) { 163 return; 164 } 165 166 memory_region_add_subregion(&s->container, gcr_base, 167 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gcr), 0)); 168 } 169 170 static Property mips_cps_properties[] = { 171 DEFINE_PROP_UINT32("num-vp", MIPSCPSState, num_vp, 1), 172 DEFINE_PROP_UINT32("num-irq", MIPSCPSState, num_irq, 256), 173 DEFINE_PROP_STRING("cpu-type", MIPSCPSState, cpu_type), 174 DEFINE_PROP_END_OF_LIST() 175 }; 176 177 static void mips_cps_class_init(ObjectClass *klass, void *data) 178 { 179 DeviceClass *dc = DEVICE_CLASS(klass); 180 181 dc->realize = mips_cps_realize; 182 device_class_set_props(dc, mips_cps_properties); 183 } 184 185 static const TypeInfo mips_cps_info = { 186 .name = TYPE_MIPS_CPS, 187 .parent = TYPE_SYS_BUS_DEVICE, 188 .instance_size = sizeof(MIPSCPSState), 189 .instance_init = mips_cps_init, 190 .class_init = mips_cps_class_init, 191 }; 192 193 static void mips_cps_register_types(void) 194 { 195 type_register_static(&mips_cps_info); 196 } 197 198 type_init(mips_cps_register_types) 199