Hi,
I am having a hard time to go through the code of linux kernel and
understands how very early console messages can be sent to the serial
console in 2.6 (I am using an arch/ppc mpc8260 system using u-boot as a
bootloader). Before the serial device driver is installed, my guess is
that messages are sent to serial console over a low level driver using
polling mode.
For example if one considers the following piece of code:
static void __init
47 m8260_setup_arch(void)
48 {
49 /* Print out Vendor and Machine info. */
50 printk(KERN_INFO "%s %s port\n", CPUINFO_VENDOR,
CPUINFO_MACHINE);
That printk is used way before the serial driver is installed. I don't
understand how this can be sent over the console. There is a low level
driver in arch/ppc/boot/simple, but it is not used in vmlinux.
Is that now part of the new 2.6 serial driver?
Thanks a lot
-jf simon
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