linux/arch
Yinghai Lu 18a8bd949d serial: convert early_uart to earlycon for 8250
Beacuse SERIAL_PORT_DFNS is removed from include/asm-i386/serial.h and
include/asm-x86_64/serial.h.  the serial8250_ports need to be probed late in
serial initializing stage.  the console_init=>serial8250_console_init=>
register_console=>serial8250_console_setup will return -ENDEV, and console
ttyS0 can not be enabled at that time.  need to wait till uart_add_one_port in
drivers/serial/serial_core.c to call register_console to get console ttyS0.
that is too late.

Make early_uart to use early_param, so uart console can be used earlier.  Make
it to be bootconsole with CON_BOOT flag, so can use console handover feature.
and it will switch to corresponding normal serial console automatically.

new command line will be:
	console=uart8250,io,0x3f8,9600n8
	console=uart8250,mmio,0xff5e0000,115200n8
or
	earlycon=uart8250,io,0x3f8,9600n8
	earlycon=uart8250,mmio,0xff5e0000,115200n8

it will print in very early stage:
	Early serial console at I/O port 0x3f8 (options '9600n8')
	console [uart0] enabled
later for console it will print:
	console handover: boot [uart0] -> real [ttyS0]

Signed-off-by: <yinghai.lu@sun.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Gerd Hoffmann <kraxel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:35 -07:00
..
alpha PCI: Only build PCI syscalls on architectures that want them 2007-07-11 16:02:13 -07:00
arm Merge branch 'ioat-md-accel-for-linus' of git://lost.foo-projects.org/~dwillia2/git/iop 2007-07-13 10:52:27 -07:00
arm26 all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00
avr32 [AVR32] Update defconfigs 2007-06-23 15:43:48 +02:00
blackfin Blackfin arch: add missing CONFIG_LARGE_ALLOCS when upstream merging 2007-07-12 14:55:05 +08:00
cris Fix trivial typos in Kconfig* files 2007-05-09 07:12:20 +02:00
frv all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00
h8300 h8300 trival patches 2007-06-01 08:18:29 -07:00
i386 x86: initial fixmap support 2007-07-16 09:05:35 -07:00
ia64 serial: convert early_uart to earlycon for 8250 2007-07-16 09:05:35 -07:00
m32r all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00
m68k x86_64: Quieten Atari keyboard warnings in Kconfig 2007-06-20 14:27:26 -07:00
m68knommu m68knommu: fix ColdFire timer off by 1 2007-06-08 17:23:32 -07:00
mips [MIPS] Make show_code static and add __user tag 2007-07-13 17:40:01 +01:00
parisc [PARISC] unwinder improvements 2007-06-21 17:46:22 -04:00
powerpc the wrong variable checked after request_irq() 2007-07-15 16:40:51 -07:00
ppc Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2007-07-12 13:40:57 -07:00
s390 missing argument in bin_attribute ->read()/->write() 2007-07-15 16:40:52 -07:00
sh sh: Handle -ERESTART_RESTARTBLOCK for restartable syscalls. 2007-06-19 12:33:21 +09:00
sh64 sh64: Handle -ERESTART_RESTARTBLOCK for restartable syscalls. 2007-06-19 12:41:32 +09:00
sparc PCI: Only build PCI syscalls on architectures that want them 2007-07-11 16:02:13 -07:00
sparc64 PCI: Only build PCI syscalls on architectures that want them 2007-07-11 16:02:13 -07:00
um uml: remove PAGE_SIZE from libc code 2007-06-16 13:16:16 -07:00
v850 all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00
x86_64 x86: initial fixmap support 2007-07-16 09:05:35 -07:00
xtensa [XTENSA] Remove non-rt signal handling 2007-05-31 17:49:32 -07:00