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 loongarch_ipi_cmp(const void *a, const void *b) 21 { 22 IPICore *ipi_a = (IPICore *)a; 23 IPICore *ipi_b = (IPICore *)b; 24 25 return ipi_a->arch_id - ipi_b->arch_id; 26 } 27 28 static int loongarch_cpu_by_arch_id(LoongsonIPICommonState *lics, 29 int64_t arch_id, int *index, CPUState **pcs) 30 { 31 IPICore ipi, *found; 32 33 ipi.arch_id = arch_id; 34 found = bsearch(&ipi, lics->cpu, lics->num_cpu, sizeof(IPICore), 35 loongarch_ipi_cmp); 36 if (found && found->cpu) { 37 if (index) { 38 *index = found - lics->cpu; 39 } 40 41 if (pcs) { 42 *pcs = found->cpu; 43 } 44 45 return MEMTX_OK; 46 } 47 48 return MEMTX_ERROR; 49 } 50 51 static void loongarch_ipi_realize(DeviceState *dev, Error **errp) 52 { 53 LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(dev); 54 LoongarchIPIClass *lic = LOONGARCH_IPI_GET_CLASS(dev); 55 MachineState *machine = MACHINE(qdev_get_machine()); 56 MachineClass *mc = MACHINE_GET_CLASS(machine); 57 const CPUArchIdList *id_list; 58 Error *local_err = NULL; 59 int i; 60 61 lic->parent_realize(dev, &local_err); 62 if (local_err) { 63 error_propagate(errp, local_err); 64 return; 65 } 66 67 assert(mc->possible_cpu_arch_ids); 68 id_list = mc->possible_cpu_arch_ids(machine); 69 lics->num_cpu = id_list->len; 70 lics->cpu = g_new0(IPICore, lics->num_cpu); 71 for (i = 0; i < lics->num_cpu; i++) { 72 lics->cpu[i].arch_id = id_list->cpus[i].arch_id; 73 lics->cpu[i].cpu = CPU(id_list->cpus[i].cpu); 74 lics->cpu[i].ipi = lics; 75 qdev_init_gpio_out(dev, &lics->cpu[i].irq, 1); 76 } 77 } 78 79 static void loongarch_ipi_class_init(ObjectClass *klass, void *data) 80 { 81 LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass); 82 LoongarchIPIClass *lic = LOONGARCH_IPI_CLASS(klass); 83 DeviceClass *dc = DEVICE_CLASS(klass); 84 85 device_class_set_parent_realize(dc, loongarch_ipi_realize, 86 &lic->parent_realize); 87 licc->get_iocsr_as = get_iocsr_as; 88 licc->cpu_by_arch_id = loongarch_cpu_by_arch_id; 89 } 90 91 static const TypeInfo loongarch_ipi_types[] = { 92 { 93 .name = TYPE_LOONGARCH_IPI, 94 .parent = TYPE_LOONGSON_IPI_COMMON, 95 .instance_size = sizeof(LoongarchIPIState), 96 .class_size = sizeof(LoongarchIPIClass), 97 .class_init = loongarch_ipi_class_init, 98 } 99 }; 100 101 DEFINE_TYPES(loongarch_ipi_types) 102