diff options
| -rw-r--r-- | hw/dma/xlnx_csu_dma.c | 17 | ||||
| -rw-r--r-- | include/hw/dma/xlnx_csu_dma.h | 19 |
2 files changed, 34 insertions, 2 deletions
diff --git a/hw/dma/xlnx_csu_dma.c b/hw/dma/xlnx_csu_dma.c index 896bb3574d..095f954476 100644 --- a/hw/dma/xlnx_csu_dma.c +++ b/hw/dma/xlnx_csu_dma.c @@ -472,6 +472,20 @@ static uint64_t addr_msb_pre_write(RegisterInfo *reg, uint64_t val) return val & R_ADDR_MSB_ADDR_MSB_MASK; } +static MemTxResult xlnx_csu_dma_class_read(XlnxCSUDMA *s, hwaddr addr, + uint32_t len) +{ + RegisterInfo *reg = &s->regs_info[R_SIZE]; + uint64_t we = MAKE_64BIT_MASK(0, 4 * 8); + + s->regs[R_ADDR] = addr; + s->regs[R_ADDR_MSB] = (uint64_t)addr >> 32; + + register_write(reg, len, we, object_get_typename(OBJECT(s)), false); + + return (s->regs[R_SIZE] == 0) ? MEMTX_OK : MEMTX_ERROR; +} + static const RegisterAccessInfo *xlnx_csu_dma_regs_info[] = { #define DMACH_REGINFO(NAME, snd) \ (const RegisterAccessInfo []) { \ @@ -696,6 +710,7 @@ static void xlnx_csu_dma_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); StreamSinkClass *ssc = STREAM_SINK_CLASS(klass); + XlnxCSUDMAClass *xcdc = XLNX_CSU_DMA_CLASS(klass); dc->reset = xlnx_csu_dma_reset; dc->realize = xlnx_csu_dma_realize; @@ -704,6 +719,8 @@ static void xlnx_csu_dma_class_init(ObjectClass *klass, void *data) ssc->push = xlnx_csu_dma_stream_push; ssc->can_push = xlnx_csu_dma_stream_can_push; + + xcdc->read = xlnx_csu_dma_class_read; } static void xlnx_csu_dma_init(Object *obj) diff --git a/include/hw/dma/xlnx_csu_dma.h b/include/hw/dma/xlnx_csu_dma.h index 28806628b1..922ab80eb6 100644 --- a/include/hw/dma/xlnx_csu_dma.h +++ b/include/hw/dma/xlnx_csu_dma.h @@ -51,7 +51,22 @@ typedef struct XlnxCSUDMA { RegisterInfo regs_info[XLNX_CSU_DMA_R_MAX]; } XlnxCSUDMA; -#define XLNX_CSU_DMA(obj) \ - OBJECT_CHECK(XlnxCSUDMA, (obj), TYPE_XLNX_CSU_DMA) +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 |