console: Override uart base address
Add a new CONFIG_OVERRIDE_UART_FOR_CONSOLE token to override the index of uart port, platform use a get_uart_for_console routine to decide what index value should be used for console. Signed-off-by: Bryant Ou <Bryant.Ou.Q@gmail.com> Change-Id: I2079bd1e5ffa209553383b6aafe3b8724849ba2a Reviewed-on: https://review.coreboot.org/c/coreboot/+/45405 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Marc Jones <marc@marcjonesconsulting.com> Reviewed-by: Jonathan Zhang <jonzhang@fb.com>
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@ -58,6 +58,14 @@ if CONSOLE_SERIAL
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comment "device-specific UART"
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depends on HAVE_UART_SPECIAL
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config OVERRIDE_UART_FOR_CONSOLE
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bool
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help
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Set to "y" when the platform overrides the index of uart port by providing
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a get_uart_for_console routine.
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if !OVERRIDE_UART_FOR_CONSOLE
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config UART_FOR_CONSOLE
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int
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prompt "Index for UART port to use for console" if !FIXED_UART_FOR_CONSOLE
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@ -87,6 +95,8 @@ depends on DRIVERS_UART_8250IO && UART_FOR_CONSOLE = 2
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comment "Serial port base address = 0x2e8"
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depends on DRIVERS_UART_8250IO && UART_FOR_CONSOLE = 3
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endif
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config UART_OVERRIDE_BAUDRATE
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bool
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help
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@ -20,6 +20,18 @@ static inline unsigned int get_uart_baudrate(void)
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}
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#endif
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#if CONFIG(OVERRIDE_UART_FOR_CONSOLE)
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/* Return the index of uart port, define this in your platform
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* when need to use variables to override the index.
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*/
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unsigned int get_uart_for_console(void);
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#else
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static inline unsigned int get_uart_for_console(void)
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{
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return CONFIG_UART_FOR_CONSOLE;
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}
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#endif
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/* Returns the divisor value for a given baudrate.
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* The formula to satisfy is:
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* refclk / divisor = baudrate * oversample
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@ -56,15 +68,15 @@ void oxford_remap(unsigned int new_base);
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#if __CONSOLE_SERIAL_ENABLE__
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static inline void __uart_init(void)
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{
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uart_init(CONFIG_UART_FOR_CONSOLE);
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uart_init(get_uart_for_console());
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}
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static inline void __uart_tx_byte(u8 data)
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{
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uart_tx_byte(CONFIG_UART_FOR_CONSOLE, data);
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uart_tx_byte(get_uart_for_console(), data);
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}
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static inline void __uart_tx_flush(void)
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{
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uart_tx_flush(CONFIG_UART_FOR_CONSOLE);
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uart_tx_flush(get_uart_for_console());
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}
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#else
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static inline void __uart_init(void) {}
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