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
get_iocsr_as(CPUState * cpu)13 static AddressSpace *get_iocsr_as(CPUState *cpu)
14 {
15 return LOONGARCH_CPU(cpu)->env.address_space_iocsr;
16 }
17
archid_cmp(const void * a,const void * b)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
find_cpu_by_archid(MachineState * ms,uint32_t id)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
loongarch_cpu_by_arch_id(int64_t arch_id)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
loongarch_ipi_class_init(ObjectClass * klass,void * data)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)
69