Messages in this thread | | | Date | Mon, 21 May 2007 10:36:58 -0700 | From | "Yinghai Lu" <> | Subject | Re: [PATCH]serial: make early_uart to use early_prarm instead of console_initcall |
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On 5/21/07, Bjorn Helgaas <bjorn.helgaas@hp.com> wrote: > > earlycon=uart,io,0x3f8,9600n8 > > earlycon=uart,io,0x3f8,9600n8 console=tty0 > > earlycon=uart,mmio,0xff5e0000,115200n8 > > Why do we have to have a new "earlycon" argument? Why can't we just > parse "console=uart" early?
with console=uart, you need to call early_serial_console_init explictly in your arch setup_arch to get early console.
with console_initcall(early_uart_console_init), the early_uart_console will be called via console_init in start_kernel, init/main.c that is not real early console.
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