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e50a641126
This commit adds the debug-console (or debugcon) device to CHV. It is a very simple device on I/O port 0xe9 supported by QEMU and BOCHS. It is meant for printing information as easy as possible, without any necessary configuration from the guest at all. It is primarily interesting to OS/kernel and firmware developers as they can produce output as soon as the guest starts without any configuration of a serial device or similar. Furthermore, a kernel hacker might use this device for information of type B whereas information of type A are printed to the serial device. This device is not used by default by Linux, Windows, or any other "real" OS, but only by toy kernels and during firmware development. In the CLI, it can be configured similar to --console or --serial with the --debug-console parameter. Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de> |
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