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249ad85a XY |
1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* | |
3 | * QEMU Loongson 7A1000 msi interrupt controller. | |
4 | * | |
5 | * Copyright (C) 2021 Loongson Technology Corporation Limited | |
6 | */ | |
7 | ||
8 | #include "qemu/osdep.h" | |
9 | #include "hw/sysbus.h" | |
10 | #include "hw/irq.h" | |
11 | #include "hw/intc/loongarch_pch_msi.h" | |
12 | #include "hw/intc/loongarch_pch_pic.h" | |
13 | #include "hw/pci/msi.h" | |
14 | #include "hw/misc/unimp.h" | |
15 | #include "migration/vmstate.h" | |
16 | #include "trace.h" | |
17 | ||
18 | static uint64_t loongarch_msi_mem_read(void *opaque, hwaddr addr, unsigned size) | |
19 | { | |
20 | return 0; | |
21 | } | |
22 | ||
23 | static void loongarch_msi_mem_write(void *opaque, hwaddr addr, | |
24 | uint64_t val, unsigned size) | |
25 | { | |
490c03ab MB |
26 | LoongArchPCHMSI *s = (LoongArchPCHMSI *)opaque; |
27 | int irq_num; | |
249ad85a | 28 | |
490c03ab MB |
29 | /* |
30 | * vector number is irq number from upper extioi intc | |
31 | * need subtract irq base to get msi vector offset | |
32 | */ | |
33 | irq_num = (val & 0xff) - s->irq_base; | |
249ad85a | 34 | trace_loongarch_msi_set_irq(irq_num); |
6027d274 | 35 | assert(irq_num < s->irq_num); |
249ad85a XY |
36 | qemu_set_irq(s->pch_msi_irq[irq_num], 1); |
37 | } | |
38 | ||
39 | static const MemoryRegionOps loongarch_pch_msi_ops = { | |
40 | .read = loongarch_msi_mem_read, | |
41 | .write = loongarch_msi_mem_write, | |
42 | .endianness = DEVICE_LITTLE_ENDIAN, | |
43 | }; | |
44 | ||
45 | static void pch_msi_irq_handler(void *opaque, int irq, int level) | |
46 | { | |
47 | LoongArchPCHMSI *s = LOONGARCH_PCH_MSI(opaque); | |
48 | ||
49 | qemu_set_irq(s->pch_msi_irq[irq], level); | |
50 | } | |
51 | ||
6027d274 TZ |
52 | static void loongarch_pch_msi_realize(DeviceState *dev, Error **errp) |
53 | { | |
54 | LoongArchPCHMSI *s = LOONGARCH_PCH_MSI(dev); | |
55 | ||
56 | if (!s->irq_num || s->irq_num > PCH_MSI_IRQ_NUM) { | |
57 | error_setg(errp, "Invalid 'msi_irq_num'"); | |
58 | return; | |
59 | } | |
60 | ||
61 | s->pch_msi_irq = g_new(qemu_irq, s->irq_num); | |
62 | ||
63 | qdev_init_gpio_out(dev, s->pch_msi_irq, s->irq_num); | |
64 | qdev_init_gpio_in(dev, pch_msi_irq_handler, s->irq_num); | |
65 | } | |
66 | ||
67 | static void loongarch_pch_msi_unrealize(DeviceState *dev) | |
68 | { | |
69 | LoongArchPCHMSI *s = LOONGARCH_PCH_MSI(dev); | |
70 | ||
71 | g_free(s->pch_msi_irq); | |
72 | } | |
73 | ||
249ad85a XY |
74 | static void loongarch_pch_msi_init(Object *obj) |
75 | { | |
76 | LoongArchPCHMSI *s = LOONGARCH_PCH_MSI(obj); | |
77 | SysBusDevice *sbd = SYS_BUS_DEVICE(obj); | |
78 | ||
79 | memory_region_init_io(&s->msi_mmio, obj, &loongarch_pch_msi_ops, | |
80 | s, TYPE_LOONGARCH_PCH_MSI, 0x8); | |
81 | sysbus_init_mmio(sbd, &s->msi_mmio); | |
82 | msi_nonbroken = true; | |
83 | ||
249ad85a XY |
84 | } |
85 | ||
490c03ab MB |
86 | static Property loongarch_msi_properties[] = { |
87 | DEFINE_PROP_UINT32("msi_irq_base", LoongArchPCHMSI, irq_base, 0), | |
6027d274 | 88 | DEFINE_PROP_UINT32("msi_irq_num", LoongArchPCHMSI, irq_num, 0), |
490c03ab MB |
89 | DEFINE_PROP_END_OF_LIST(), |
90 | }; | |
91 | ||
92 | static void loongarch_pch_msi_class_init(ObjectClass *klass, void *data) | |
93 | { | |
94 | DeviceClass *dc = DEVICE_CLASS(klass); | |
95 | ||
6027d274 TZ |
96 | dc->realize = loongarch_pch_msi_realize; |
97 | dc->unrealize = loongarch_pch_msi_unrealize; | |
490c03ab MB |
98 | device_class_set_props(dc, loongarch_msi_properties); |
99 | } | |
100 | ||
249ad85a XY |
101 | static const TypeInfo loongarch_pch_msi_info = { |
102 | .name = TYPE_LOONGARCH_PCH_MSI, | |
103 | .parent = TYPE_SYS_BUS_DEVICE, | |
104 | .instance_size = sizeof(LoongArchPCHMSI), | |
105 | .instance_init = loongarch_pch_msi_init, | |
490c03ab | 106 | .class_init = loongarch_pch_msi_class_init, |
249ad85a XY |
107 | }; |
108 | ||
109 | static void loongarch_pch_msi_register_types(void) | |
110 | { | |
111 | type_register_static(&loongarch_pch_msi_info); | |
112 | } | |
113 | ||
114 | type_init(loongarch_pch_msi_register_types) |