:orphan:

.. title:: X86_VERY_EARLY_CONSOLE

.. option:: CONFIG_X86_VERY_EARLY_CONSOLE

*Support very early boot printk*

Type: ``bool``

Help
====

Non-emulated X86 devices often require special hardware to attach
a debugger, which may not be easily available. This option adds a
very minimal serial driver which gets initialized at the very
beginning of z_cstart(), via arch_kernel_init(). This driver enables
printk to emit messages to the 16550 UART port 0 instance in device
tree. This mini-driver assumes I/O to the UART is done via ports.

Direct dependencies
===================

\ :option:`PRINTK <CONFIG_PRINTK>` && \ :option:`X86 <CONFIG_X86>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y

Kconfig definition
==================

.. highlight:: kconfig

At ``arch/x86/Kconfig:176``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:29`` → ``arch/Kconfig:12``

Menu path: (Top) → X86 Architecture Options

.. parsed-literal::

    config X86_VERY_EARLY_CONSOLE
    	bool "Support very early boot printk"
    	default y
    	depends on \ :option:`PRINTK <CONFIG_PRINTK>` && \ :option:`X86 <CONFIG_X86>`
    	help
    	  Non-emulated X86 devices often require special hardware to attach
    	  a debugger, which may not be easily available. This option adds a
    	  very minimal serial driver which gets initialized at the very
    	  beginning of z_cstart(), via arch_kernel_init(). This driver enables
    	  printk to emit messages to the 16550 UART port 0 instance in device
    	  tree. This mini-driver assumes I/O to the UART is done via ports.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*