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
|
/*
* DMA device simulation in PKUnity SoC
*
* Copyright (C) 2010-2012 Guan Xuetao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation, or any later version.
* See the COPYING file in the top-level directory.
*/
#include "hw/hw.h"
#include "hw/sysbus.h"
#undef DEBUG_PUV3
#include "hw/unicore32/puv3.h"
#define PUV3_DMA_CH_NR (6)
#define PUV3_DMA_CH_MASK (0xff)
#define PUV3_DMA_CH(offset) ((offset) >> 8)
typedef struct {
SysBusDevice busdev;
MemoryRegion iomem;
uint32_t reg_CFG[PUV3_DMA_CH_NR];
} PUV3DMAState;
static uint64_t puv3_dma_read(void *opaque, hwaddr offset,
unsigned size)
{
PUV3DMAState *s = opaque;
uint32_t ret = 0;
assert(PUV3_DMA_CH(offset) < PUV3_DMA_CH_NR);
switch (offset & PUV3_DMA_CH_MASK) {
case 0x10:
ret = s->reg_CFG[PUV3_DMA_CH(offset)];
break;
default:
DPRINTF("Bad offset 0x%x\n", offset);
}
DPRINTF("offset 0x%x, value 0x%x\n", offset, ret);
return ret;
}
static void puv3_dma_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
PUV3DMAState *s = opaque;
assert(PUV3_DMA_CH(offset) < PUV3_DMA_CH_NR);
switch (offset & PUV3_DMA_CH_MASK) {
case 0x10:
s->reg_CFG[PUV3_DMA_CH(offset)] = value;
break;
default:
DPRINTF("Bad offset 0x%x\n", offset);
}
DPRINTF("offset 0x%x, value 0x%x\n", offset, value);
}
static const MemoryRegionOps puv3_dma_ops = {
.read = puv3_dma_read,
.write = puv3_dma_write,
.impl = {
.min_access_size = 4,
.max_access_size = 4,
},
.endianness = DEVICE_NATIVE_ENDIAN,
};
static int puv3_dma_init(SysBusDevice *dev)
{
PUV3DMAState *s = FROM_SYSBUS(PUV3DMAState, dev);
int i;
for (i = 0; i < PUV3_DMA_CH_NR; i++) {
s->reg_CFG[i] = 0x0;
}
memory_region_init_io(&s->iomem, OBJECT(s), &puv3_dma_ops, s, "puv3_dma",
PUV3_REGS_OFFSET);
sysbus_init_mmio(dev, &s->iomem);
return 0;
}
static void puv3_dma_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
sdc->init = puv3_dma_init;
}
static const TypeInfo puv3_dma_info = {
.name = "puv3_dma",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(PUV3DMAState),
.class_init = puv3_dma_class_init,
};
static void puv3_dma_register_type(void)
{
type_register_static(&puv3_dma_info);
}
type_init(puv3_dma_register_type)
|
