| commit | 294cdac2a02d3172b69c84dec727d6ac6006bb59 | |
| author | Peter Crosthwaite <peter.crosthwaite@xilinx.com> | |
| Mon, 6 Jan 2014 10:16:40 +0000 (6 10:16 +0000) | ||
| committer | Peter Maydell <peter.maydell@linaro.org> | |
| Tue, 7 Jan 2014 19:18:07 +0000 (7 19:18 +0000) | ||
| tree | c4a72fb0a8f23c45ec384e4bae6a7bd168b86d71 | treesnapshot (tar.gz zip) |
| parent | a33f37a1784691556ed6fd3f58badfce22b761ad | commitdiff |
char/cadence_uart: Implement Tx flow control
If the UART back-end blocks, buffer in the Tx FIFO to try again later.
This stops the IO-thread busy waiting on char back-ends (which causes
all sorts of performance problems).
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 4bea048b3ab38425701d82ccc1ab92545c26b79c.1388626249.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
If the UART back-end blocks, buffer in the Tx FIFO to try again later.
This stops the IO-thread busy waiting on char back-ends (which causes
all sorts of performance problems).
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 4bea048b3ab38425701d82ccc1ab92545c26b79c.1388626249.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| hw/char/cadence_uart.c | diffblobblamehistory |