[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH V3 36/41] xen/arm: Don't use pl011 UART by default for early printk
On Fri, 2013-05-10 at 03:18 +0100, Julien Grall wrote: > Add CONFIG_EARLY_PRINTK options in configs/arm{32,64}.mk to let the user > to choose if he wants to have early output, ie before the console is > initialized. > > This code is specific for each UART. When CONFIG_EARLY_PRINTK is enabled, > Xen will only be able to run on a board with this UART. > > If a developper wants to add support for a new UART, he must implement the > following assembly macro/define: > - EALY_UART_BASE_ADDRESS: variable which contains the physical base address > for the UART > - early_uart_init: initialize the UART > - early_uart_ready: check and wait until the UART can transmit a new > character > - early_uart_transmit: transmit a character > > For more details about the parameters of each function, > see arm{32,64}/debug-pl011.inc comments. > > Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx> _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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