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hw/char/pl011: add a clock input

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Add a clock input to the PL011 UART so we can compute the current baud
rate and trace it. This is intended for developers who wish to use QEMU
to e.g. debug their firmware or to figure out the baud rate configured
by an unknown/closed source binary.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Luc Michel <luc@lmichel.fr>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Luc Michel 2020-10-10 15:57:58 +02:00 • committed by Peter Maydell
parent 83ad469547
commit aac63e0e6e
3 changed files with 47 additions and 0 deletions
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1
include/hw/char/pl011.h
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@ -49,6 +49,7 @@ struct PL011State {
int read_trigger;
CharBackend chr;
qemu_irq irq[6];
Clock *clk;
const unsigned char *id;
};