forked from mirror/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/*
|
|
* Xilinx Platform CSU Stream DMA emulation
|
|
*
|
|
* This implementation is based on
|
|
* https://github.com/Xilinx/qemu/blob/master/hw/dma/csu_stream_dma.c
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 or
|
|
* (at your option) version 3 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef XLNX_CSU_DMA_H
|
|
#define XLNX_CSU_DMA_H
|
|
|
|
#include "hw/sysbus.h"
|
|
#include "hw/register.h"
|
|
#include "hw/ptimer.h"
|
|
#include "hw/stream.h"
|
|
|
|
#define TYPE_XLNX_CSU_DMA "xlnx.csu_dma"
|
|
|
|
#define XLNX_CSU_DMA_R_MAX (0x2c / 4)
|
|
|
|
typedef struct XlnxCSUDMA {
|
|
SysBusDevice busdev;
|
|
MemoryRegion iomem;
|
|
MemTxAttrs attr;
|
|
MemoryRegion *dma_mr;
|
|
AddressSpace dma_as;
|
|
qemu_irq irq;
|
|
StreamSink *tx_dev; /* Used as generic StreamSink */
|
|
ptimer_state *src_timer;
|
|
|
|
uint16_t width;
|
|
bool is_dst;
|
|
bool r_size_last_word;
|
|
|
|
StreamCanPushNotifyFn notify;
|
|
void *notify_opaque;
|
|
|
|
uint32_t regs[XLNX_CSU_DMA_R_MAX];
|
|
RegisterInfo regs_info[XLNX_CSU_DMA_R_MAX];
|
|
} XlnxCSUDMA;
|
|
|
|
OBJECT_DECLARE_TYPE(XlnxCSUDMA, XlnxCSUDMAClass, XLNX_CSU_DMA)
|
|
|
|
struct XlnxCSUDMAClass {
|
|
SysBusDeviceClass parent_class;
|
|
|
|
/*
|
|
* read: Start a read transfer on a Xilinx CSU DMA engine
|
|
*
|
|
* @s: the Xilinx CSU DMA engine to start the transfer on
|
|
* @addr: the address to read
|
|
* @len: the number of bytes to read at 'addr'
|
|
*
|
|
* @return a MemTxResult indicating whether the operation succeeded ('len'
|
|
* bytes were read) or failed.
|
|
*/
|
|
MemTxResult (*read)(XlnxCSUDMA *s, hwaddr addr, uint32_t len);
|
|
};
|
|
|
|
#endif
|