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Make the current baud rate (if specified) a property of the UART, to
allow the default_serial_console() function to specify the default
baud rate as well as the default UART device.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Remove the assumption that all platforms use a fixed number of 16550
UARTs identifiable by a simple numeric index. Create an abstraction
allowing for dynamic instantiation and registration of any number of
arbitrary UART models.
The common case of the serial console on x86 uses a single fixed UART
specified at compile time. Avoid unnecessarily dragging in the
dynamic instantiation code in this use case by allowing COMCONSOLE to
refer to a single static UART object representing the relevant port.
When selecting a UART by command-line argument (as used in the
"gdbstub serial <port>" command), allow the UART to be specified as
either a numeric index (to retain backwards compatiblity) or a
case-insensitive port name such as "COM2".
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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In the context of serial consoles, the use of any frame formats other
than the standard 8 data bits, no parity, and one stop bit is so rare
as to be nonexistent.
Remove the almost certainly unused support for custom frame formats.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Check for existence of the UART in uart_select(), not just in
uart_init(). This allows uart_select() to refuse to set a non-working
address in uart->base, which in turns means that the serial console
code will not attempt to use a non-existent UART.
Reported-by: Torgeir Wulfsberg <Torgeir.Wulfsberg@kongsberg.com>
Reported-by: Ján ONDREJ (SAL) <ondrejj@salstar.sk>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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