Commit 78a96c86 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by John Paul Adrian Glaubitz
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Documentation: kernel-parameters: Add earlyprintk=bios on SH 



Document the use of the "earlyprintk=bios[,keep]" kernel parameter
option on SuperH systems with a SuperH standard BIOS.

Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarJohn Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/febc920964f2f0919d21775132e84c5cc270177e.1697708489.git.geert+renesas@glider.be


Signed-off-by: default avatarJohn Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
parent 553f7ac7

Documentation/admin-guide/kernel-parameters.txt

+3 −0
Original line number Diff line number Diff line
@@ -1331,6 +1331,7 @@ 
			earlyprintk=dbgp[debugController#]

			earlyprintk=pciserial[,force],bus:device.function[,baudrate]

			earlyprintk=xdbc[xhciController#]

			earlyprintk=bios



			earlyprintk is useful when the kernel crashes before

			the normal console is initialized. It is not enabled by
@@ -1361,6 +1362,8 @@ 


			The sclp output can only be used on s390.



			The bios output can only be used on SuperH.



			The optional "force" to "pciserial" enables use of a

			PCI device even when its classcode is not of the

			UART class.