Difference between revisions of "Console and outputs"

From coreboot
Jump to navigation Jump to search
Line 23: Line 23:
|-
|-
! [[Spkmodem| Console trough spkmodem]]
! [[Spkmodem| Console trough spkmodem]]
For writting to it:
* coreboot's console
* grub's console
For reading it:
* coreboot's/grub's spkmodem_recv uttility
|
|
* output only
* output only

Revision as of 12:36, 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

For writting to it:

  • coreboot's console
  • grub's console

For reading it:

  • coreboot's/grub's spkmodem_recv uttility
  • 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: