1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Cortex-A9MPCore Snoop Control Unit (SCU) emulation.
*
* Copyright (c) 2009 CodeSourcery.
* Copyright (c) 2011 Linaro Limited.
* Written by Paul Brook, Peter Maydell.
*
* This code is licensed under the GPL.
*/
#include "qemu/osdep.h"
#include "hw/misc/a9scu.h"
#include "qemu/module.h"
static uint64_t a9_scu_read(void *opaque, hwaddr offset,
unsigned size)
{
A9SCUState *s = (A9SCUState *)opaque;
switch (offset) {
case 0x00: /* Control */
return s->control;
case 0x04: /* Configuration */
return (((1 << s->num_cpu) - 1) << 4) | (s->num_cpu - 1);
case 0x08: /* CPU Power Status */
return s->status;
case 0x09: /* CPU status. */
return s->status >> 8;
case 0x0a: /* CPU status. */
return s->status >> 16;
case 0x0b: /* CPU status. */
return s->status >> 24;
case 0x0c: /* Invalidate All Registers In Secure State */
return 0;
case 0x40: /* Filtering Start Address Register */
case 0x44: /* Filtering End Address Register */
/* RAZ/WI, like an implementation with only one AXI master */
return 0;
case 0x50: /* SCU Access Control Register */
case 0x54: /* SCU Non-secure Access Control Register */
/* unimplemented, fall through */
default:
return 0;
}
}
static void a9_scu_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
A9SCUState *s = (A9SCUState *)opaque;
uint32_t mask;
uint32_t shift;
switch (size) {
case 1:
mask = 0xff;
break;
case 2:
mask = 0xffff;
break;
case 4:
mask = 0xffffffff;
break;
default:
fprintf(stderr, "Invalid size %u in write to a9 scu register %x\n",
size, (unsigned)offset);
return;
}
switch (offset) {
case 0x00: /* Control */
s->control = value & 1;
break;
case 0x4: /* Configuration: RO */
break;
case 0x08: case 0x09: case 0x0A: case 0x0B: /* Power Control */
shift = (offset - 0x8) * 8;
s->status &= ~(mask << shift);
s->status |= ((value & mask) << shift);
break;
case 0x0c: /* Invalidate All Registers In Secure State */
/* no-op as we do not implement caches */
break;
case 0x40: /* Filtering Start Address Register */
case 0x44: /* Filtering End Address Register */
/* RAZ/WI, like an implementation with only one AXI master */
break;
case 0x50: /* SCU Access Control Register */
case 0x54: /* SCU Non-secure Access Control Register */
/* unimplemented, fall through */
default:
break;
}
}
static const MemoryRegionOps a9_scu_ops = {
.read = a9_scu_read,
.write = a9_scu_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void a9_scu_reset(DeviceState *dev)
{
A9SCUState *s = A9_SCU(dev);
s->control = 0;
}
static void a9_scu_init(Object *obj)
{
A9SCUState *s = A9_SCU(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
memory_region_init_io(&s->iomem, obj, &a9_scu_ops, s,
"a9-scu", 0x100);
sysbus_init_mmio(sbd, &s->iomem);
}
static const VMStateDescription vmstate_a9_scu = {
.name = "a9-scu",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(control, A9SCUState),
VMSTATE_UINT32(status, A9SCUState),
VMSTATE_END_OF_LIST()
}
};
static Property a9_scu_properties[] = {
DEFINE_PROP_UINT32("num-cpu", A9SCUState, num_cpu, 1),
DEFINE_PROP_END_OF_LIST(),
};
static void a9_scu_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->props = a9_scu_properties;
dc->vmsd = &vmstate_a9_scu;
dc->reset = a9_scu_reset;
}
static const TypeInfo a9_scu_info = {
.name = TYPE_A9_SCU,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(A9SCUState),
.instance_init = a9_scu_init,
.class_init = a9_scu_class_init,
};
static void a9mp_register_types(void)
{
type_register_static(&a9_scu_info);
}
type_init(a9mp_register_types)
|
