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    SubjectRe: [patch] early printk and boot console fixups.
    Date
    On Tuesday 15 May 2007 10:17:50 pm Yinghai Lu wrote:
    > for early_uart_console, I have some ideas:
    > 1. merged that into early_serial_console in
    > arch/x86_64/kernel/early_printk.c, and
    > move early_printk.c to kernel/, --- make it understand
    > earlyprintk=uart,io,0x3f8,9600n8
    > earlyprintk=uart,mmio,0xff5e0000,115200n8
    > in addition to vga, ttyS, serial

    I would rather try to merge 8250_early and early_printk.
    "console=uart,io,0x3f8" is already pretty similar to
    "earlyprintk=serial", and it would be nice to have only one.

    "console=uart" does have the disadvantage that you have to know the
    port address. But it has the advantage that it doesn't depend on
    compiled-in legacy serial port names. If you need early console
    output, you're probably a developer and can come up with the address.

    I think it would be nice to have a "console=vga". That could use
    the current "earlyprintk=vga" implementation, and automatically
    hand off to tty0.

    Then we could remove "earlyprintk=" and always use "console=uart"
    or "console=vga".

    Bjorn


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