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1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * QEMU Loongson 7A1000 I/O interrupt controller.
4 * Copyright (C) 2024 Loongson Technology Corporation Limited
5 */
6
7 #include "qemu/osdep.h"
8 #include "qapi/error.h"
9 #include "hw/intc/loongarch_pic_common.h"
10 #include "hw/core/qdev-properties.h"
11 #include "migration/vmstate.h"
12
13 static int loongarch_pic_pre_save(void *opaque)
14 {
15 LoongArchPICCommonState *s = (LoongArchPICCommonState *)opaque;
16 LoongArchPICCommonClass *lpcc = LOONGARCH_PIC_COMMON_GET_CLASS(s);
17
18 if (lpcc->pre_save) {
19 return lpcc->pre_save(s);
20 }
21
22 return 0;
23 }
24
25 static int loongarch_pic_post_load(void *opaque, int version_id)
26 {
27 LoongArchPICCommonState *s = (LoongArchPICCommonState *)opaque;
28 LoongArchPICCommonClass *lpcc = LOONGARCH_PIC_COMMON_GET_CLASS(s);
29
30 if (lpcc->post_load) {
31 return lpcc->post_load(s, version_id);
32 }
33
34 return 0;
35 }
36
37 static void loongarch_pic_common_realize(DeviceState *dev, Error **errp)
38 {
39 LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(dev);
40
41 if (!s->irq_num || s->irq_num > VIRT_PCH_PIC_IRQ_NUM) {
42 error_setg(errp, "Invalid 'pic_irq_num'");
43 return;
44 }
45 }
46
47 static void loongarch_pic_common_reset_hold(Object *obj, ResetType type)
48 {
49 LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(obj);
50 int i;
51
52 /*
53 * With Loongson 7A1000 user manual
54 * Chapter 5.2 "Description of Interrupt-related Registers"
55 *
56 * Interrupt controller identification register 1
57 * Bit 24-31 Interrupt Controller ID
58 * Interrupt controller identification register 2
59 * Bit 0-7 Interrupt Controller version number
60 * Bit 16-23 The number of interrupt sources supported
61 */
62 s->id.desc.id = PCH_PIC_INT_ID_VAL;
63 s->id.desc.version = PCH_PIC_INT_ID_VER;
64 s->id.desc.irq_num = s->irq_num - 1;
65 s->int_mask = UINT64_MAX;
66 s->htmsi_en = 0x0;
67 s->intedge = 0x0;
68 s->intclr = 0x0;
69 s->auto_crtl0 = 0x0;
70 s->auto_crtl1 = 0x0;
71 for (i = 0; i < 64; i++) {
72 s->route_entry[i] = 0x1;
73 s->htmsi_vector[i] = 0x0;
74 }
75 s->intirr = 0x0;
76 s->intisr = 0x0;
77 s->last_intirr = 0x0;
78 s->int_polarity = 0x0;
79 }
80
81 static const Property loongarch_pic_common_properties[] = {
82 DEFINE_PROP_UINT32("pch_pic_irq_num", LoongArchPICCommonState, irq_num, 0),
83 };
84
85 static const VMStateDescription vmstate_loongarch_pic_common = {
86 .name = "loongarch_pch_pic",
87 .version_id = 1,
88 .minimum_version_id = 1,
89 .pre_save = loongarch_pic_pre_save,
90 .post_load = loongarch_pic_post_load,
91 .fields = (const VMStateField[]) {
92 VMSTATE_UINT64(int_mask, LoongArchPICCommonState),
93 VMSTATE_UINT64(htmsi_en, LoongArchPICCommonState),
94 VMSTATE_UINT64(intedge, LoongArchPICCommonState),
95 VMSTATE_UINT64(intclr, LoongArchPICCommonState),
96 VMSTATE_UINT64(auto_crtl0, LoongArchPICCommonState),
97 VMSTATE_UINT64(auto_crtl1, LoongArchPICCommonState),
98 VMSTATE_UINT8_ARRAY(route_entry, LoongArchPICCommonState, 64),
99 VMSTATE_UINT8_ARRAY(htmsi_vector, LoongArchPICCommonState, 64),
100 VMSTATE_UINT64(last_intirr, LoongArchPICCommonState),
101 VMSTATE_UINT64(intirr, LoongArchPICCommonState),
102 VMSTATE_UINT64(intisr, LoongArchPICCommonState),
103 VMSTATE_UINT64(int_polarity, LoongArchPICCommonState),
104 VMSTATE_END_OF_LIST()
105 }
106 };
107
108 static void loongarch_pic_common_class_init(ObjectClass *klass,
109 const void *data)
110 {
111 DeviceClass *dc = DEVICE_CLASS(klass);
112 LoongArchPICCommonClass *lpcc = LOONGARCH_PIC_COMMON_CLASS(klass);
113 ResettableClass *rc = RESETTABLE_CLASS(klass);
114
115 device_class_set_parent_realize(dc, loongarch_pic_common_realize,
116 &lpcc->parent_realize);
117 resettable_class_set_parent_phases(rc, NULL,
118 loongarch_pic_common_reset_hold,
119 NULL, &lpcc->parent_phases);
120 device_class_set_props(dc, loongarch_pic_common_properties);
121 dc->vmsd = &vmstate_loongarch_pic_common;
122 }
123
124 static const TypeInfo loongarch_pic_common_types[] = {
125 {
126 .name = TYPE_LOONGARCH_PIC_COMMON,
127 .parent = TYPE_SYS_BUS_DEVICE,
128 .instance_size = sizeof(LoongArchPICCommonState),
129 .class_size = sizeof(LoongArchPICCommonClass),
130 .class_init = loongarch_pic_common_class_init,
131 .abstract = true,
132 }
133 };
134
135 DEFINE_TYPES(loongarch_pic_common_types)