Go to file
Tobias Diedrich ba9f0b30fb With low serial console loglevels a pcie graphics card is not
initialized properly because the pcie link takes some time to come
up.

I set the timeout rather arbitrary to 100ms, this is what a BIOS_ERR
and higher only boot looks like on my system (with pcie printks set
to BIOS_ERR so they show up):

|Device error
|Device error
|PCI: 00:02.0 PCIe link up after 35800 us
|PCI: 00:03.0 PCIe link up after 12900 us
|PCI: 00:03.1 PCIe link timeout
|PCI: 00:03.2 PCIe link up after 32000 us
|APIC: 00 missing read_resources
|I2C: 01:50 missing read_resources
|I2C: 01:51 missing read_resources
|I2C: 01:52 missing read_resources
|I2C: 01:53 missing read_resources
|Start bios (version pre-0.6.2-20101025_023503-nukunuku)

Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Acked-by: Stefan Reinauer <stepan@coreboot.org>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6121 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
2010-11-24 19:57:08 +00:00
documentation Whitespace/typo/cosmetic fixes (trivial). 2010-09-23 18:48:27 +00:00
payloads Printing coreboot debug messages on VGA console is pretty much useless, since 2010-11-22 08:09:50 +00:00
src With low serial console loglevels a pcie graphics card is not 2010-11-24 19:57:08 +00:00
util USBDEBUG by default in abuild was committed by mistake and 2010-11-23 07:30:50 +00:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
Makefile Add test to check for up-to-date GPL license headers to lint. 2010-11-19 10:16:43 +00:00
README Whitespace/typo/cosmetic fixes (trivial). 2010-09-23 18:48:27 +00:00

README

-------------------------------------------------------------------------------
coreboot README
-------------------------------------------------------------------------------

coreboot is a Free Software project aimed at replacing the proprietary
BIOS you can find in most of today's computers.

It performs just a little bit of hardware initialization and then executes
one of many possible payloads, e.g. a Linux kernel or a bootloader.


Payloads
--------

After the basic initialization of the hardware has been performed, any
desired "payload" can be started by coreboot.

See http://www.coreboot.org/Payloads for a list of supported payloads.


Supported Hardware
------------------

coreboot supports a wide range of chipsets, devices, and mainboards.

For details please consult:

 * http://www.coreboot.org/Supported_Motherboards
 * http://www.coreboot.org/Supported_Chipsets_and_Devices


Build Requirements
------------------

 * gcc / g++
 * make

Optional:

 * doxygen (for generating/viewing documentation)
 * iasl (for targets with ACPI support)
 * gdb (for better debugging facilities on some targets)
 * ncurses (for 'make menuconfig')
 * flex and bison (for regenerating parsers)


Building coreboot
-----------------

Please consult http://www.coreboot.org/Build_HOWTO for details.


Testing coreboot Without Modifying Your Hardware
------------------------------------------------

If you want to test coreboot without any risks before you really decide
to use it on your hardware, you can use the QEMU system emulator to run
coreboot virtually in QEMU.

Please see http://www.coreboot.org/QEMU for details.


Website and Mailing List
------------------------

Further details on the project, a FAQ, many HOWTOs, news, development
guidelines and more can be found on the coreboot website:

  http://www.coreboot.org

You can contact us directly on the coreboot mailing list:

  http://www.coreboot.org/Mailinglist


Copyright and License
---------------------

The copyright on coreboot is owned by quite a large number of individual
developers and companies. Please check the individual source files for details.

coreboot is licensed under the terms of the GNU General Public License (GPL).
Some files are licensed under the "GPL (version 2, or any later version)",
and some files are licensed under the "GPL, version 2". For some parts, which
were derived from other projects, other (GPL-compatible) licenses may apply.
Please check the individual source files for details.

This makes the resulting coreboot images licensed under the GPL, version 2.