diff options
| -rw-r--r-- | hw/net/can/xlnx-zynqmp-can.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/hw/net/can/xlnx-zynqmp-can.c b/hw/net/can/xlnx-zynqmp-can.c index 1f1c686479..f60e480c3a 100644 --- a/hw/net/can/xlnx-zynqmp-can.c +++ b/hw/net/can/xlnx-zynqmp-can.c @@ -778,14 +778,18 @@ static void update_rx_fifo(XlnxZynqMPCANState *s, const qemu_can_frame *frame) } } -static uint64_t can_rxfifo_pre_read(RegisterInfo *reg, uint64_t val) +static uint64_t can_rxfifo_post_read_id(RegisterInfo *reg, uint64_t val) { XlnxZynqMPCANState *s = XLNX_ZYNQMP_CAN(reg->opaque); + unsigned used = fifo32_num_used(&s->rx_fifo); - if (!fifo32_is_empty(&s->rx_fifo)) { - val = fifo32_pop(&s->rx_fifo); - } else { + if (used < CAN_FRAME_SIZE) { ARRAY_FIELD_DP32(s->regs, INTERRUPT_STATUS_REGISTER, RXUFLW, 1); + } else { + val = s->regs[R_RXFIFO_ID] = fifo32_pop(&s->rx_fifo); + s->regs[R_RXFIFO_DLC] = fifo32_pop(&s->rx_fifo); + s->regs[R_RXFIFO_DATA1] = fifo32_pop(&s->rx_fifo); + s->regs[R_RXFIFO_DATA2] = fifo32_pop(&s->rx_fifo); } can_update_irq(s); @@ -946,14 +950,11 @@ static const RegisterAccessInfo can_regs_info[] = { .post_write = can_tx_post_write, },{ .name = "RXFIFO_ID", .addr = A_RXFIFO_ID, .ro = 0xffffffff, - .post_read = can_rxfifo_pre_read, + .post_read = can_rxfifo_post_read_id, },{ .name = "RXFIFO_DLC", .addr = A_RXFIFO_DLC, .rsvd = 0xfff0000, - .post_read = can_rxfifo_pre_read, },{ .name = "RXFIFO_DATA1", .addr = A_RXFIFO_DATA1, - .post_read = can_rxfifo_pre_read, },{ .name = "RXFIFO_DATA2", .addr = A_RXFIFO_DATA2, - .post_read = can_rxfifo_pre_read, },{ .name = "AFR", .addr = A_AFR, .rsvd = 0xfffffff0, .post_write = can_filter_enable_post_write, |