diff options
Diffstat (limited to 'include/hw/dma')
| -rw-r--r-- | include/hw/dma/sifive_pdma.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/include/hw/dma/sifive_pdma.h b/include/hw/dma/sifive_pdma.h new file mode 100644 index 0000000..e319bbd --- /dev/null +++ b/include/hw/dma/sifive_pdma.h @@ -0,0 +1,57 @@ +/* + * SiFive Platform DMA emulation + * + * Copyright (c) 2020 Wind River Systems, Inc. + * + * Author: + * Bin Meng <bin.meng@windriver.com> + * + * 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 SIFIVE_PDMA_H +#define SIFIVE_PDMA_H + +struct sifive_pdma_chan { + uint32_t control; + uint32_t next_config; + uint64_t next_bytes; + uint64_t next_dst; + uint64_t next_src; + uint32_t exec_config; + uint64_t exec_bytes; + uint64_t exec_dst; + uint64_t exec_src; + int state; +}; + +#define SIFIVE_PDMA_CHANS 4 +#define SIFIVE_PDMA_IRQS (SIFIVE_PDMA_CHANS * 2) +#define SIFIVE_PDMA_REG_SIZE 0x100000 +#define SIFIVE_PDMA_CHAN_NO(reg) ((reg & (SIFIVE_PDMA_REG_SIZE - 1)) >> 12) + +typedef struct SiFivePDMAState { + SysBusDevice parent; + MemoryRegion iomem; + qemu_irq irq[SIFIVE_PDMA_IRQS]; + + struct sifive_pdma_chan chan[SIFIVE_PDMA_CHANS]; +} SiFivePDMAState; + +#define TYPE_SIFIVE_PDMA "sifive.pdma" + +#define SIFIVE_PDMA(obj) \ + OBJECT_CHECK(SiFivePDMAState, (obj), TYPE_SIFIVE_PDMA) + +#endif /* SIFIVE_PDMA_H */ |