hw/intc/loongarch_ipi.c

   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 "hw/intc/loongarch_ipi.h"
  11 #include "target/loongarch/cpu.h"
  12
  13 static AddressSpace *get_iocsr_as(CPUState *cpu)
  14 {
  15     return LOONGARCH_CPU(cpu)->env.address_space_iocsr;
  16 }
  17
  18 static int archid_cmp(const void *a, const void *b)
  19 {
  20    CPUArchId *archid_a = (CPUArchId *)a;
  21    CPUArchId *archid_b = (CPUArchId *)b;
  22
  23    return archid_a->arch_id - archid_b->arch_id;
  24 }
  25
  26 static CPUArchId *find_cpu_by_archid(MachineState *ms, uint32_t id)
  27 {
  28     CPUArchId apic_id, *found_cpu;
  29
  30     apic_id.arch_id = id;
  31     found_cpu = bsearch(&apic_id, ms->possible_cpus->cpus,
  32                         ms->possible_cpus->len,
  33                         sizeof(*ms->possible_cpus->cpus),
  34                         archid_cmp);
  35
  36     return found_cpu;
  37 }
  38
  39 static CPUState *loongarch_cpu_by_arch_id(int64_t arch_id)
  40 {
  41     MachineState *machine = MACHINE(qdev_get_machine());
  42     CPUArchId *archid;
  43
  44     archid = find_cpu_by_archid(machine, arch_id);
  45     if (archid) {
  46         return CPU(archid->cpu);
  47     }
  48
  49     return NULL;
  50 }
  51
  52 static void loongarch_ipi_class_init(ObjectClass *klass, void *data)
  53 {
  54     LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass);
  55
  56     licc->get_iocsr_as = get_iocsr_as;
  57     licc->cpu_by_arch_id = loongarch_cpu_by_arch_id;
  58 }
  59
  60 static const TypeInfo loongarch_ipi_types[] = {
  61     {
  62         .name               = TYPE_LOONGARCH_IPI,
  63         .parent             = TYPE_LOONGSON_IPI_COMMON,
  64         .class_init         = loongarch_ipi_class_init,
  65     }
  66 };
  67
  68 DEFINE_TYPES(loongarch_ipi_types)