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Duncan Laurie 86bf3f518f ELOG: Find flash base in FMAP if possible
Now that we have FMAP support in coreboot use it to find the
offset in flash for ELOG to use.

If coreboot has elog configured with a smaller size then use
that over the FMAP size.  This is because I set aside a 16KB
region in the FMAP but we only use 4KB of it to keep the impact
to boot/resume speed to a minimum.

FMAP: Found "FMAP" version 1.0 at ffe10000.
FMAP: base = 0 size = 800000 #areas = 32
FMAP: area RW_ELOG found
FMAP:   offset: 3f0000
FMAP:   size:   16384 bytes
FMAP: No valid base address, using 0xff800000
ELOG: base=0x003f0000 base_ptr=0xffbf0000
ELOG: MEM @0x00190ad8 FLASH @0xffbf0000
ELOG: areas are 4096 bytes, full threshold 3072, shrink size 1024

Change-Id: I3d826812c0f259d61f41b42797c58dd179f9f1c8
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1706
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2012-11-08 19:38:06 +01:00
3rdparty@f933fda790 Finally update 3rdparty 2012-07-19 13:58:02 +02:00
documentation AMD S3: Add a document about S3 on AMD platform 2012-08-15 23:19:50 +02:00
payloads libpayload: Turn the "debug" #define into the usb_debug static inline function. 2012-11-07 18:38:37 +01:00
src ELOG: Find flash base in FMAP if possible 2012-11-08 19:38:06 +01:00
util cbfstool: respect dependencies when building locally 2012-11-07 18:29:18 +01:00
.gitignore Reorder entries in .gitignore 2012-10-27 02:32:49 +02:00
.gitmodules Add 3rdparty as submodule 2012-05-01 00:08:37 +02:00
.gitreview add .gitreview 2012-11-01 23:13:39 +01:00
COPYING
Makefile Makefile: No need to mkdir when distclean 2012-10-22 21:49:35 +02:00
Makefile.inc Strip quotes from $(objcbfs) 2012-11-07 08:28:19 +01:00
README Update README with newer version of the text from the web page 2011-06-15 10:16:33 +02:00

README

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

coreboot is a Free Software project aimed at replacing the proprietary BIOS
(firmware) found in most computers.  coreboot performs a little bit of
hardware initialization and then executes additional boot logic, called a
payload.

With the separation of hardware initialization and later boot logic,
coreboot can scale from specialized applications that run directly
firmware, run operating systems in flash, load custom
bootloaders, or implement firmware standards, like PC BIOS services or
UEFI. This allows for systems to only include the features necessary
in the target application, reducing the amount of code and flash space
required.

coreboot was formerly known as LinuxBIOS.


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.