1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Loongson ipi interrupt support
4 *
5 * Copyright (C) 2021 Loongson Technology Corporation Limited
6 */
7
8 #include "qemu/osdep.h"
9 #include "hw/intc/loongson_ipi.h"
10 #include "qapi/error.h"
11 #include "target/mips/cpu.h"
12
get_iocsr_as(CPUState * cpu)13 static AddressSpace *get_iocsr_as(CPUState *cpu)
14 {
15 if (ase_lcsr_available(&MIPS_CPU(cpu)->env)) {
16 return &MIPS_CPU(cpu)->env.iocsr.as;
17 }
18
19 return NULL;
20 }
21
22 static const MemoryRegionOps loongson_ipi_core_ops = {
23 .read_with_attrs = loongson_ipi_core_readl,
24 .write_with_attrs = loongson_ipi_core_writel,
25 .impl.min_access_size = 4,
26 .impl.max_access_size = 4,
27 .valid.min_access_size = 4,
28 .valid.max_access_size = 8,
29 .endianness = DEVICE_LITTLE_ENDIAN,
30 };
31
loongson_ipi_realize(DeviceState * dev,Error ** errp)32 static void loongson_ipi_realize(DeviceState *dev, Error **errp)
33 {
34 LoongsonIPICommonState *sc = LOONGSON_IPI_COMMON(dev);
35 LoongsonIPIState *s = LOONGSON_IPI(dev);
36 LoongsonIPIClass *lic = LOONGSON_IPI_GET_CLASS(dev);
37 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
38 Error *local_err = NULL;
39
40 lic->parent_realize(dev, &local_err);
41 if (local_err) {
42 error_propagate(errp, local_err);
43 return;
44 }
45
46 s->ipi_mmio_mem = g_new0(MemoryRegion, sc->num_cpu);
47 for (unsigned i = 0; i < sc->num_cpu; i++) {
48 g_autofree char *name = g_strdup_printf("loongson_ipi_cpu%d_mmio", i);
49
50 memory_region_init_io(&s->ipi_mmio_mem[i], OBJECT(dev),
51 &loongson_ipi_core_ops, &sc->cpu[i], name, 0x48);
52 sysbus_init_mmio(sbd, &s->ipi_mmio_mem[i]);
53 }
54 }
55
loongson_ipi_unrealize(DeviceState * dev)56 static void loongson_ipi_unrealize(DeviceState *dev)
57 {
58 LoongsonIPIState *s = LOONGSON_IPI(dev);
59 LoongsonIPIClass *k = LOONGSON_IPI_GET_CLASS(dev);
60
61 g_free(s->ipi_mmio_mem);
62
63 k->parent_unrealize(dev);
64 }
65
loongson_ipi_class_init(ObjectClass * klass,void * data)66 static void loongson_ipi_class_init(ObjectClass *klass, void *data)
67 {
68 DeviceClass *dc = DEVICE_CLASS(klass);
69 LoongsonIPIClass *lic = LOONGSON_IPI_CLASS(klass);
70 LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass);
71
72 device_class_set_parent_realize(dc, loongson_ipi_realize,
73 &lic->parent_realize);
74 device_class_set_parent_unrealize(dc, loongson_ipi_unrealize,
75 &lic->parent_unrealize);
76 licc->get_iocsr_as = get_iocsr_as;
77 licc->cpu_by_arch_id = cpu_by_arch_id;
78 }
79
80 static const TypeInfo loongson_ipi_types[] = {
81 {
82 .name = TYPE_LOONGSON_IPI,
83 .parent = TYPE_LOONGSON_IPI_COMMON,
84 .instance_size = sizeof(LoongsonIPIState),
85 .class_size = sizeof(LoongsonIPIClass),
86 .class_init = loongson_ipi_class_init,
87 }
88 };
89
90 DEFINE_TYPES(loongson_ipi_types)
91