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1 /*
2 * ARM11MPCore internal peripheral emulation.
3 *
4 * Copyright (c) 2006-2007 CodeSourcery.
5 * Written by Paul Brook
6 *
7 * This code is licensed under the GPL.
8 */
9
10 #include "qemu/osdep.h"
11 #include "qapi/error.h"
12 #include "qemu/module.h"
13 #include "hw/cpu/arm11mpcore.h"
14 #include "hw/intc/realview_gic.h"
15 #include "hw/core/irq.h"
16 #include "hw/core/qdev-properties.h"
17
18 #define ARM11MPCORE_NUM_GIC_PRIORITY_BITS 4
19
20 static void mpcore_priv_set_irq(void *opaque, int irq, int level)
21 {
22 ARM11MPCorePriveState *s = (ARM11MPCorePriveState *)opaque;
23
24 qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
25 }
26
27 static void mpcore_priv_map_setup(ARM11MPCorePriveState *s)
28 {
29 int i;
30 SysBusDevice *scubusdev = SYS_BUS_DEVICE(&s->scu);
31 DeviceState *gicdev = DEVICE(&s->gic);
32 SysBusDevice *gicbusdev = SYS_BUS_DEVICE(&s->gic);
33 SysBusDevice *timerbusdev = SYS_BUS_DEVICE(&s->mptimer);
34 SysBusDevice *wdtbusdev = SYS_BUS_DEVICE(&s->wdtimer);
35
36 memory_region_add_subregion(&s->container, 0,
37 sysbus_mmio_get_region(scubusdev, 0));
38 /* GIC CPU interfaces: "current CPU" at 0x100, then specific CPUs
39 * at 0x200, 0x300...
40 */
41 for (i = 0; i < (s->num_cpu + 1); i++) {
42 hwaddr offset = 0x100 + (i * 0x100);
43 memory_region_add_subregion(&s->container, offset,
44 sysbus_mmio_get_region(gicbusdev, i + 1));
45 }
46 /* Add the regions for timer and watchdog for "current CPU" and
47 * for each specific CPU.
48 */
49 for (i = 0; i < (s->num_cpu + 1); i++) {
50 /* Timers at 0x600, 0x700, ...; watchdogs at 0x620, 0x720, ... */
51 hwaddr offset = 0x600 + i * 0x100;
52 memory_region_add_subregion(&s->container, offset,
53 sysbus_mmio_get_region(timerbusdev, i));
54 memory_region_add_subregion(&s->container, offset + 0x20,
55 sysbus_mmio_get_region(wdtbusdev, i));
56 }
57 memory_region_add_subregion(&s->container, 0x1000,
58 sysbus_mmio_get_region(gicbusdev, 0));
59 /* Wire up the interrupt from each watchdog and timer.
60 * For each core the timer is PPI 29 and the watchdog PPI 30.
61 */
62 for (i = 0; i < s->num_cpu; i++) {
63 int ppibase = (s->num_irq - 32) + i * 32;
64 sysbus_connect_irq(timerbusdev, i,
65 qdev_get_gpio_in(gicdev, ppibase + 29));
66 sysbus_connect_irq(wdtbusdev, i,
67 qdev_get_gpio_in(gicdev, ppibase + 30));
68 }
69 }
70
71 static void mpcore_priv_realize(DeviceState *dev, Error **errp)
72 {
73 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
74 ARM11MPCorePriveState *s = ARM11MPCORE_PRIV(dev);
75 DeviceState *scudev = DEVICE(&s->scu);
76 DeviceState *gicdev = DEVICE(&s->gic);
77 DeviceState *mptimerdev = DEVICE(&s->mptimer);
78 DeviceState *wdtimerdev = DEVICE(&s->wdtimer);
79
80 qdev_prop_set_uint32(scudev, "num-cpu", s->num_cpu);
81 if (!sysbus_realize(SYS_BUS_DEVICE(&s->scu), errp)) {
82 return;
83 }
84
85 qdev_prop_set_uint32(gicdev, "num-cpu", s->num_cpu);
86 qdev_prop_set_uint32(gicdev, "num-irq", s->num_irq);
87 qdev_prop_set_uint32(gicdev, "num-priority-bits",
88 ARM11MPCORE_NUM_GIC_PRIORITY_BITS);
89
90
91 if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic), errp)) {
92 return;
93 }
94
95 /* Pass through outbound IRQ lines from the GIC */
96 sysbus_pass_irq(sbd, SYS_BUS_DEVICE(&s->gic));
97
98 /* Pass through inbound GPIO lines to the GIC */
99 qdev_init_gpio_in(dev, mpcore_priv_set_irq, s->num_irq - 32);
100
101 qdev_prop_set_uint32(mptimerdev, "num-cpu", s->num_cpu);
102 if (!sysbus_realize(SYS_BUS_DEVICE(&s->mptimer), errp)) {
103 return;
104 }
105
106 qdev_prop_set_uint32(wdtimerdev, "num-cpu", s->num_cpu);
107 if (!sysbus_realize(SYS_BUS_DEVICE(&s->wdtimer), errp)) {
108 return;
109 }
110
111 mpcore_priv_map_setup(s);
112 }
113
114 static void mpcore_priv_initfn(Object *obj)
115 {
116 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
117 ARM11MPCorePriveState *s = ARM11MPCORE_PRIV(obj);
118
119 memory_region_init(&s->container, OBJECT(s),
120 "mpcore-priv-container", 0x2000);
121 sysbus_init_mmio(sbd, &s->container);
122
123 object_initialize_child(obj, "scu", &s->scu, TYPE_ARM11_SCU);
124
125 object_initialize_child(obj, "gic", &s->gic, TYPE_ARM_GIC);
126 /* Request the legacy 11MPCore GIC behaviour: */
127 qdev_prop_set_uint32(DEVICE(&s->gic), "revision", 0);
128
129 object_initialize_child(obj, "mptimer", &s->mptimer, TYPE_ARM_MPTIMER);
130
131 object_initialize_child(obj, "wdtimer", &s->wdtimer, TYPE_ARM_MPTIMER);
132 }
133
134 static const Property mpcore_priv_properties[] = {
135 DEFINE_PROP_UINT32("num-cpu", ARM11MPCorePriveState, num_cpu, 1),
136 /* The ARM11 MPCORE TRM says the on-chip controller may have
137 * anything from 0 to 224 external interrupt IRQ lines (with another
138 * 32 internal). We default to 32+32, which is the number provided by
139 * the ARM11 MPCore test chip in the Realview Versatile Express
140 * coretile. Other boards may differ and should set this property
141 * appropriately. Some Linux kernels may not boot if the hardware
142 * has more IRQ lines than the kernel expects.
143 */
144 DEFINE_PROP_UINT32("num-irq", ARM11MPCorePriveState, num_irq, 64),
145 };
146
147 static void mpcore_priv_class_init(ObjectClass *klass, const void *data)
148 {
149 DeviceClass *dc = DEVICE_CLASS(klass);
150
151 dc->realize = mpcore_priv_realize;
152 device_class_set_props(dc, mpcore_priv_properties);
153 }
154
155 static const TypeInfo arm11mp_types[] = {
156 {
157 .name = TYPE_ARM11MPCORE_PRIV,
158 .parent = TYPE_SYS_BUS_DEVICE,
159 .instance_size = sizeof(ARM11MPCorePriveState),
160 .instance_init = mpcore_priv_initfn,
161 .class_init = mpcore_priv_class_init,
162 },
163 };
164
165 DEFINE_TYPES(arm11mp_types)