Console and outputs: Difference between revisions

Revision as of 12:33, 15 December 2013

Coreboot has various possible consoles:

Output name	direction (from the target coreboot machine point of view)	software compatibility (compatibility with software loaded after coreboot, like OS payloads etc...)
Serial console	input output	seabios grub as a payload grub running after seabios libpayload linux kernel (loaded after the payload) most GNU/Linux init systems(sysvinit, systemd, upstart etc...)
Console Over EHCI debug port	input? output
Console trough spkmodem	output only
Network console	output
Cbmem console	output only	For writting to the buffer: coreboot console output grub console output For reading the buffer: grub with the cbmemc command coreboot's userspace cbmem -c uttility

Other output:

@@ Line 34: / Line 34: @@
 * output only
 |
+For writting to the buffer:
+* coreboot console output
+* grub console output
 For reading the buffer:
 * grub with the cbmemc command
 * coreboot's userspace cbmem -c uttility
-For writting to the buffer:
-* coreboot console output
-* grub console output
 |-
 |}