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ff8f06ee SP |
1 | /* |
2 | * ARM GICv3 support - common bits of emulated and KVM kernel model | |
3 | * | |
4 | * Copyright (c) 2012 Linaro Limited | |
5 | * Copyright (c) 2015 Huawei. | |
6 | * Written by Peter Maydell | |
7 | * Extended to 64 cores by Shlomo Pongratz | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation, either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, see <http://www.gnu.org/licenses/>. | |
21 | */ | |
22 | ||
23 | #include "hw/intc/arm_gicv3_common.h" | |
24 | ||
25 | static void gicv3_pre_save(void *opaque) | |
26 | { | |
27 | GICv3State *s = (GICv3State *)opaque; | |
28 | ARMGICv3CommonClass *c = ARM_GICV3_COMMON_GET_CLASS(s); | |
29 | ||
30 | if (c->pre_save) { | |
31 | c->pre_save(s); | |
32 | } | |
33 | } | |
34 | ||
35 | static int gicv3_post_load(void *opaque, int version_id) | |
36 | { | |
37 | GICv3State *s = (GICv3State *)opaque; | |
38 | ARMGICv3CommonClass *c = ARM_GICV3_COMMON_GET_CLASS(s); | |
39 | ||
40 | if (c->post_load) { | |
41 | c->post_load(s); | |
42 | } | |
43 | return 0; | |
44 | } | |
45 | ||
46 | static const VMStateDescription vmstate_gicv3 = { | |
47 | .name = "arm_gicv3", | |
48 | .unmigratable = 1, | |
49 | .pre_save = gicv3_pre_save, | |
50 | .post_load = gicv3_post_load, | |
51 | }; | |
52 | ||
53 | void gicv3_init_irqs_and_mmio(GICv3State *s, qemu_irq_handler handler, | |
54 | const MemoryRegionOps *ops) | |
55 | { | |
56 | SysBusDevice *sbd = SYS_BUS_DEVICE(s); | |
57 | int i; | |
58 | ||
59 | /* For the GIC, also expose incoming GPIO lines for PPIs for each CPU. | |
60 | * GPIO array layout is thus: | |
61 | * [0..N-1] spi | |
62 | * [N..N+31] PPIs for CPU 0 | |
63 | * [N+32..N+63] PPIs for CPU 1 | |
64 | * ... | |
65 | */ | |
66 | i = s->num_irq - GIC_INTERNAL + GIC_INTERNAL * s->num_cpu; | |
67 | qdev_init_gpio_in(DEVICE(s), handler, i); | |
68 | ||
69 | s->parent_irq = g_malloc(s->num_cpu * sizeof(qemu_irq)); | |
70 | s->parent_fiq = g_malloc(s->num_cpu * sizeof(qemu_irq)); | |
71 | ||
72 | for (i = 0; i < s->num_cpu; i++) { | |
73 | sysbus_init_irq(sbd, &s->parent_irq[i]); | |
74 | } | |
75 | for (i = 0; i < s->num_cpu; i++) { | |
76 | sysbus_init_irq(sbd, &s->parent_fiq[i]); | |
77 | } | |
78 | ||
79 | memory_region_init_io(&s->iomem_dist, OBJECT(s), ops, s, | |
80 | "gicv3_dist", 0x10000); | |
81 | memory_region_init_io(&s->iomem_redist, OBJECT(s), ops ? &ops[1] : NULL, s, | |
82 | "gicv3_redist", 0x20000 * s->num_cpu); | |
83 | ||
84 | sysbus_init_mmio(sbd, &s->iomem_dist); | |
85 | sysbus_init_mmio(sbd, &s->iomem_redist); | |
86 | } | |
87 | ||
88 | static void arm_gicv3_common_realize(DeviceState *dev, Error **errp) | |
89 | { | |
90 | GICv3State *s = ARM_GICV3_COMMON(dev); | |
91 | ||
92 | /* revision property is actually reserved and currently used only in order | |
93 | * to keep the interface compatible with GICv2 code, avoiding extra | |
94 | * conditions. However, in future it could be used, for example, if we | |
95 | * implement GICv4. | |
96 | */ | |
97 | if (s->revision != 3) { | |
98 | error_setg(errp, "unsupported GIC revision %d", s->revision); | |
99 | return; | |
100 | } | |
101 | } | |
102 | ||
103 | static void arm_gicv3_common_reset(DeviceState *dev) | |
104 | { | |
105 | /* TODO */ | |
106 | } | |
107 | ||
108 | static Property arm_gicv3_common_properties[] = { | |
109 | DEFINE_PROP_UINT32("num-cpu", GICv3State, num_cpu, 1), | |
110 | DEFINE_PROP_UINT32("num-irq", GICv3State, num_irq, 32), | |
111 | DEFINE_PROP_UINT32("revision", GICv3State, revision, 3), | |
112 | DEFINE_PROP_BOOL("has-security-extensions", GICv3State, security_extn, 0), | |
113 | DEFINE_PROP_END_OF_LIST(), | |
114 | }; | |
115 | ||
116 | static void arm_gicv3_common_class_init(ObjectClass *klass, void *data) | |
117 | { | |
118 | DeviceClass *dc = DEVICE_CLASS(klass); | |
119 | ||
120 | dc->reset = arm_gicv3_common_reset; | |
121 | dc->realize = arm_gicv3_common_realize; | |
122 | dc->props = arm_gicv3_common_properties; | |
123 | dc->vmsd = &vmstate_gicv3; | |
124 | } | |
125 | ||
126 | static const TypeInfo arm_gicv3_common_type = { | |
127 | .name = TYPE_ARM_GICV3_COMMON, | |
128 | .parent = TYPE_SYS_BUS_DEVICE, | |
129 | .instance_size = sizeof(GICv3State), | |
130 | .class_size = sizeof(ARMGICv3CommonClass), | |
131 | .class_init = arm_gicv3_common_class_init, | |
132 | .abstract = true, | |
133 | }; | |
134 | ||
135 | static void register_types(void) | |
136 | { | |
137 | type_register_static(&arm_gicv3_common_type); | |
138 | } | |
139 | ||
140 | type_init(register_types) |