1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * LoongArch IPI interrupt support 4 * 5 * Copyright (C) 2024 Loongson Technology Corporation Limited 6 */ 7 8 #include "qemu/osdep.h" 9 #include "hw/boards.h" 10 #include "qapi/error.h" 11 #include "hw/intc/loongarch_ipi.h" 12 #include "hw/qdev-properties.h" 13 #include "target/loongarch/cpu.h" 14 15 static AddressSpace *get_iocsr_as(CPUState *cpu) 16 { 17 return LOONGARCH_CPU(cpu)->env.address_space_iocsr; 18 } 19 20 static int archid_cmp(const void *a, const void *b) 21 { 22 CPUArchId *archid_a = (CPUArchId *)a; 23 CPUArchId *archid_b = (CPUArchId *)b; 24 25 return archid_a->arch_id - archid_b->arch_id; 26 } 27 28 static CPUArchId *find_cpu_by_archid(MachineState *ms, uint32_t id) 29 { 30 CPUArchId apic_id, *found_cpu; 31 32 apic_id.arch_id = id; 33 found_cpu = bsearch(&apic_id, ms->possible_cpus->cpus, 34 ms->possible_cpus->len, 35 sizeof(*ms->possible_cpus->cpus), 36 archid_cmp); 37 38 return found_cpu; 39 } 40 41 static CPUState *loongarch_cpu_by_arch_id(int64_t arch_id) 42 { 43 MachineState *machine = MACHINE(qdev_get_machine()); 44 CPUArchId *archid; 45 46 archid = find_cpu_by_archid(machine, arch_id); 47 if (archid) { 48 return CPU(archid->cpu); 49 } 50 51 return NULL; 52 } 53 54 static void loongarch_ipi_realize(DeviceState *dev, Error **errp) 55 { 56 LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(dev); 57 LoongarchIPIClass *lic = LOONGARCH_IPI_GET_CLASS(dev); 58 MachineState *machine = MACHINE(qdev_get_machine()); 59 MachineClass *mc = MACHINE_GET_CLASS(machine); 60 const CPUArchIdList *id_list; 61 Error *local_err = NULL; 62 int i; 63 64 lic->parent_realize(dev, &local_err); 65 if (local_err) { 66 error_propagate(errp, local_err); 67 return; 68 } 69 70 assert(mc->possible_cpu_arch_ids); 71 id_list = mc->possible_cpu_arch_ids(machine); 72 lics->num_cpu = id_list->len; 73 lics->cpu = g_new0(IPICore, lics->num_cpu); 74 for (i = 0; i < lics->num_cpu; i++) { 75 lics->cpu[i].arch_id = id_list->cpus[i].arch_id; 76 lics->cpu[i].cpu = CPU(id_list->cpus[i].cpu); 77 lics->cpu[i].ipi = lics; 78 qdev_init_gpio_out(dev, &lics->cpu[i].irq, 1); 79 } 80 } 81 82 static const Property loongarch_ipi_properties[] = { 83 DEFINE_PROP_UINT32("num-cpu", LoongsonIPICommonState, num_cpu, 1), 84 }; 85 86 static void loongarch_ipi_class_init(ObjectClass *klass, void *data) 87 { 88 LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass); 89 LoongarchIPIClass *lic = LOONGARCH_IPI_CLASS(klass); 90 DeviceClass *dc = DEVICE_CLASS(klass); 91 92 device_class_set_parent_realize(dc, loongarch_ipi_realize, 93 &lic->parent_realize); 94 device_class_set_props(dc, loongarch_ipi_properties); 95 licc->get_iocsr_as = get_iocsr_as; 96 licc->cpu_by_arch_id = loongarch_cpu_by_arch_id; 97 } 98 99 static const TypeInfo loongarch_ipi_types[] = { 100 { 101 .name = TYPE_LOONGARCH_IPI, 102 .parent = TYPE_LOONGSON_IPI_COMMON, 103 .instance_size = sizeof(LoongarchIPIState), 104 .class_size = sizeof(LoongarchIPIClass), 105 .class_init = loongarch_ipi_class_init, 106 } 107 }; 108 109 DEFINE_TYPES(loongarch_ipi_types) 110