110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
|
|
* 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.h"
|
|
#include "sysbus.h"
|
|
|
|
#undef DEBUG_PUV3
|
|
#include "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, &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)
|