2 * DMA device simulation in PKUnity SoC
4 * Copyright (C) 2010-2012 Guan Xuetao
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation, or any later version.
9 * See the COPYING file in the top-level directory.
12 #include "qemu/osdep.h"
14 #include "hw/sysbus.h"
17 #include "hw/unicore32/puv3.h"
18 #include "qemu/module.h"
20 #define PUV3_DMA_CH_NR (6)
21 #define PUV3_DMA_CH_MASK (0xff)
22 #define PUV3_DMA_CH(offset) ((offset) >> 8)
24 #define TYPE_PUV3_DMA "puv3_dma"
25 #define PUV3_DMA(obj) OBJECT_CHECK(PUV3DMAState, (obj), TYPE_PUV3_DMA)
27 typedef struct PUV3DMAState
{
28 SysBusDevice parent_obj
;
31 uint32_t reg_CFG
[PUV3_DMA_CH_NR
];
34 static uint64_t puv3_dma_read(void *opaque
, hwaddr offset
,
37 PUV3DMAState
*s
= opaque
;
40 assert(PUV3_DMA_CH(offset
) < PUV3_DMA_CH_NR
);
42 switch (offset
& PUV3_DMA_CH_MASK
) {
44 ret
= s
->reg_CFG
[PUV3_DMA_CH(offset
)];
47 DPRINTF("Bad offset 0x%x\n", offset
);
49 DPRINTF("offset 0x%x, value 0x%x\n", offset
, ret
);
54 static void puv3_dma_write(void *opaque
, hwaddr offset
,
55 uint64_t value
, unsigned size
)
57 PUV3DMAState
*s
= opaque
;
59 assert(PUV3_DMA_CH(offset
) < PUV3_DMA_CH_NR
);
61 switch (offset
& PUV3_DMA_CH_MASK
) {
63 s
->reg_CFG
[PUV3_DMA_CH(offset
)] = value
;
66 DPRINTF("Bad offset 0x%x\n", offset
);
68 DPRINTF("offset 0x%x, value 0x%x\n", offset
, value
);
71 static const MemoryRegionOps puv3_dma_ops
= {
72 .read
= puv3_dma_read
,
73 .write
= puv3_dma_write
,
78 .endianness
= DEVICE_NATIVE_ENDIAN
,
81 static void puv3_dma_realize(DeviceState
*dev
, Error
**errp
)
83 PUV3DMAState
*s
= PUV3_DMA(dev
);
86 for (i
= 0; i
< PUV3_DMA_CH_NR
; i
++) {
90 memory_region_init_io(&s
->iomem
, OBJECT(s
), &puv3_dma_ops
, s
, "puv3_dma",
92 sysbus_init_mmio(SYS_BUS_DEVICE(dev
), &s
->iomem
);
95 static void puv3_dma_class_init(ObjectClass
*klass
, void *data
)
97 DeviceClass
*dc
= DEVICE_CLASS(klass
);
99 dc
->realize
= puv3_dma_realize
;
102 static const TypeInfo puv3_dma_info
= {
103 .name
= TYPE_PUV3_DMA
,
104 .parent
= TYPE_SYS_BUS_DEVICE
,
105 .instance_size
= sizeof(PUV3DMAState
),
106 .class_init
= puv3_dma_class_init
,
109 static void puv3_dma_register_type(void)
111 type_register_static(&puv3_dma_info
);
114 type_init(puv3_dma_register_type
)