1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Loongson extioi interrupt controller emulation 4 * Copyright (C) 2024 Loongson Technology Corporation Limited 5 */ 6 #include "qemu/osdep.h" 7 #include "qemu/error-report.h" 8 #include "qemu/module.h" 9 #include "qapi/error.h" 10 #include "hw/qdev-properties.h" 11 #include "hw/intc/loongarch_extioi_common.h" 12 #include "migration/vmstate.h" 13 #include "target/loongarch/cpu.h" 14 15 static ExtIOICore *loongarch_extioi_get_cpu(LoongArchExtIOICommonState *s, 16 DeviceState *dev) 17 { 18 CPUClass *k = CPU_GET_CLASS(dev); 19 uint64_t arch_id = k->get_arch_id(CPU(dev)); 20 int i; 21 22 for (i = 0; i < s->num_cpu; i++) { 23 if (s->cpu[i].arch_id == arch_id) { 24 return &s->cpu[i]; 25 } 26 } 27 28 return NULL; 29 } 30 31 static void loongarch_extioi_cpu_plug(HotplugHandler *hotplug_dev, 32 DeviceState *dev, Error **errp) 33 { 34 LoongArchExtIOICommonState *s = LOONGARCH_EXTIOI_COMMON(hotplug_dev); 35 Object *obj = OBJECT(dev); 36 ExtIOICore *core; 37 int pin, index; 38 39 if (!object_dynamic_cast(obj, TYPE_LOONGARCH_CPU)) { 40 warn_report("LoongArch extioi: Invalid %s device type", 41 object_get_typename(obj)); 42 return; 43 } 44 45 core = loongarch_extioi_get_cpu(s, dev); 46 if (!core) { 47 return; 48 } 49 50 core->cpu = CPU(dev); 51 index = core - s->cpu; 52 53 /* 54 * connect extioi irq to the cpu irq 55 * cpu_pin[LS3A_INTC_IP + 2 : 2] <= intc_pin[LS3A_INTC_IP : 0] 56 */ 57 for (pin = 0; pin < LS3A_INTC_IP; pin++) { 58 qdev_connect_gpio_out(DEVICE(s), index * LS3A_INTC_IP + pin, 59 qdev_get_gpio_in(dev, pin + 2)); 60 } 61 } 62 63 static void loongarch_extioi_cpu_unplug(HotplugHandler *hotplug_dev, 64 DeviceState *dev, Error **errp) 65 { 66 LoongArchExtIOICommonState *s = LOONGARCH_EXTIOI_COMMON(hotplug_dev); 67 Object *obj = OBJECT(dev); 68 ExtIOICore *core; 69 70 if (!object_dynamic_cast(obj, TYPE_LOONGARCH_CPU)) { 71 warn_report("LoongArch extioi: Invalid %s device type", 72 object_get_typename(obj)); 73 return; 74 } 75 76 core = loongarch_extioi_get_cpu(s, dev); 77 if (!core) { 78 return; 79 } 80 81 core->cpu = NULL; 82 } 83 84 static void loongarch_extioi_common_realize(DeviceState *dev, Error **errp) 85 { 86 LoongArchExtIOICommonState *s = (LoongArchExtIOICommonState *)dev; 87 MachineState *machine = MACHINE(qdev_get_machine()); 88 MachineClass *mc = MACHINE_GET_CLASS(machine); 89 const CPUArchIdList *id_list; 90 int i, pin; 91 92 assert(mc->possible_cpu_arch_ids); 93 id_list = mc->possible_cpu_arch_ids(machine); 94 s->num_cpu = id_list->len; 95 s->cpu = g_new0(ExtIOICore, s->num_cpu); 96 if (s->cpu == NULL) { 97 error_setg(errp, "Memory allocation for ExtIOICore faile"); 98 return; 99 } 100 101 for (i = 0; i < s->num_cpu; i++) { 102 s->cpu[i].arch_id = id_list->cpus[i].arch_id; 103 s->cpu[i].cpu = CPU(id_list->cpus[i].cpu); 104 105 for (pin = 0; pin < LS3A_INTC_IP; pin++) { 106 qdev_init_gpio_out(dev, &s->cpu[i].parent_irq[pin], 1); 107 } 108 } 109 } 110 111 static int loongarch_extioi_common_pre_save(void *opaque) 112 { 113 LoongArchExtIOICommonState *s = (LoongArchExtIOICommonState *)opaque; 114 LoongArchExtIOICommonClass *lecc = LOONGARCH_EXTIOI_COMMON_GET_CLASS(s); 115 116 if (lecc->pre_save) { 117 return lecc->pre_save(s); 118 } 119 120 return 0; 121 } 122 123 static int loongarch_extioi_common_post_load(void *opaque, int version_id) 124 { 125 LoongArchExtIOICommonState *s = (LoongArchExtIOICommonState *)opaque; 126 LoongArchExtIOICommonClass *lecc = LOONGARCH_EXTIOI_COMMON_GET_CLASS(s); 127 128 if (lecc->post_load) { 129 return lecc->post_load(s, version_id); 130 } 131 132 return 0; 133 } 134 135 static const VMStateDescription vmstate_extioi_core = { 136 .name = "extioi-core", 137 .version_id = 1, 138 .minimum_version_id = 1, 139 .fields = (const VMStateField[]) { 140 VMSTATE_UINT32_ARRAY(coreisr, ExtIOICore, EXTIOI_IRQS_GROUP_COUNT), 141 VMSTATE_END_OF_LIST() 142 } 143 }; 144 145 static const VMStateDescription vmstate_loongarch_extioi = { 146 .name = "loongarch.extioi", 147 .version_id = 3, 148 .minimum_version_id = 3, 149 .pre_save = loongarch_extioi_common_pre_save, 150 .post_load = loongarch_extioi_common_post_load, 151 .fields = (const VMStateField[]) { 152 VMSTATE_UINT32_ARRAY(bounce, LoongArchExtIOICommonState, 153 EXTIOI_IRQS_GROUP_COUNT), 154 VMSTATE_UINT32_ARRAY(nodetype, LoongArchExtIOICommonState, 155 EXTIOI_IRQS_NODETYPE_COUNT / 2), 156 VMSTATE_UINT32_ARRAY(enable, LoongArchExtIOICommonState, 157 EXTIOI_IRQS / 32), 158 VMSTATE_UINT32_ARRAY(isr, LoongArchExtIOICommonState, 159 EXTIOI_IRQS / 32), 160 VMSTATE_UINT32_ARRAY(ipmap, LoongArchExtIOICommonState, 161 EXTIOI_IRQS_IPMAP_SIZE / 4), 162 VMSTATE_UINT32_ARRAY(coremap, LoongArchExtIOICommonState, 163 EXTIOI_IRQS / 4), 164 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(cpu, LoongArchExtIOICommonState, 165 num_cpu, vmstate_extioi_core, ExtIOICore), 166 VMSTATE_UINT32(features, LoongArchExtIOICommonState), 167 VMSTATE_UINT32(status, LoongArchExtIOICommonState), 168 VMSTATE_END_OF_LIST() 169 } 170 }; 171 172 static const Property extioi_properties[] = { 173 DEFINE_PROP_BIT("has-virtualization-extension", LoongArchExtIOICommonState, 174 features, EXTIOI_HAS_VIRT_EXTENSION, 0), 175 }; 176 177 static void loongarch_extioi_common_class_init(ObjectClass *klass, void *data) 178 { 179 DeviceClass *dc = DEVICE_CLASS(klass); 180 LoongArchExtIOICommonClass *lecc = LOONGARCH_EXTIOI_COMMON_CLASS(klass); 181 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 182 183 device_class_set_parent_realize(dc, loongarch_extioi_common_realize, 184 &lecc->parent_realize); 185 device_class_set_props(dc, extioi_properties); 186 dc->vmsd = &vmstate_loongarch_extioi; 187 hc->plug = loongarch_extioi_cpu_plug; 188 hc->unplug = loongarch_extioi_cpu_unplug; 189 } 190 191 static const TypeInfo loongarch_extioi_common_types[] = { 192 { 193 .name = TYPE_LOONGARCH_EXTIOI_COMMON, 194 .parent = TYPE_SYS_BUS_DEVICE, 195 .instance_size = sizeof(LoongArchExtIOICommonState), 196 .class_size = sizeof(LoongArchExtIOICommonClass), 197 .class_init = loongarch_extioi_common_class_init, 198 .interfaces = (InterfaceInfo[]) { 199 { TYPE_HOTPLUG_HANDLER }, 200 { } 201 }, 202 .abstract = true, 203 } 204 }; 205 206 DEFINE_TYPES(loongarch_extioi_common_types) 207