diff options
| author | Alexander Wagner <alexander.wagner@ulal.de> | 2021-03-09 16:21:30 +0100 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2021-03-22 21:54:40 -0400 |
| commit | 82a4ed8e5014ee814c63be33987e6783d5eacce2 (patch) | |
| tree | cf3d201721301c39b3442d2eb73e95fb7c2121ab /include | |
| parent | 5e437d3ccdccfd85f6e69ca60f921be2dab62c3c (diff) | |
hw/char: disable ibex uart receive if the buffer is full
Not disabling the UART leads to QEMU overwriting the UART receive buffer with
the newest received byte. The rx_level variable is added to allow the use of
the existing OpenTitan driver libraries.
Signed-off-by: Alexander Wagner <alexander.wagner@ulal.de>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20210309152130.13038-1-alexander.wagner@ulal.de
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/char/ibex_uart.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/hw/char/ibex_uart.h b/include/hw/char/ibex_uart.h index 03d19e3f6f..546f958eb8 100644 --- a/include/hw/char/ibex_uart.h +++ b/include/hw/char/ibex_uart.h @@ -62,6 +62,8 @@ REG32(FIFO_CTRL, 0x1c) FIELD(FIFO_CTRL, RXILVL, 2, 3) FIELD(FIFO_CTRL, TXILVL, 5, 2) REG32(FIFO_STATUS, 0x20) + FIELD(FIFO_STATUS, TXLVL, 0, 5) + FIELD(FIFO_STATUS, RXLVL, 16, 5) REG32(OVRD, 0x24) REG32(VAL, 0x28) REG32(TIMEOUT_CTRL, 0x2c) @@ -82,6 +84,8 @@ struct IbexUartState { uint8_t tx_fifo[IBEX_UART_TX_FIFO_SIZE]; uint32_t tx_level; + uint32_t rx_level; + QEMUTimer *fifo_trigger_handle; uint64_t char_tx_time; |