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Stefan Reinauer 935850e082 asrock/e350m1: reduce default stack size 
The stack used on the ASRock E350M1 is significantly less than
what we currently set (64k per core). In fact, we use about half
of the default stack size (4k) on core 0 and even less on non
BSP cores [1]:

    $ grep stack coreboot_without_patch_but_monotonic_timer.log
    CPU1: stack_base 002a0000, stack_end 002afff8
    CPU1: stack: 002a0000 - 002b0000, lowest used address 002afda8, stack used: 600 bytes
    CPU0: stack: 002b0000 - 002c0000, lowest used address 002bf75c, stack used: 2212 bytes

Removing the Kconfig variable STACK_SIZE to use the default results
in the following numbers of stack usage.

    $ grep stack coreboot_with_patch.log
    CPU1: stack_base 00287000, stack_end 00287ff8
    CPU1: stack: 00287000 - 00288000, lowest used address 00287da8, stack used: 600 bytes
    CPU0: stack: 00288000 - 00289000, lowest used address 0028875c, stack used: 2212 bytes

[1] http://review.coreboot.org/#/c/3154/
    (comment May 2 10:21 AM)

Change-Id: Ibdb2102c86094fce3787e3b5a162ca8423de205c
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Tested-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/3209
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
 		2013-05-07 18:30:43 +02:00
3rdparty@ba8caa30bd Update 3rdparty mark to latest repository 2013-03-15 19:09:08 +01:00
documentation documentation: Complete the AMD-S3.txt 2013-04-16 02:31:08 +02:00
payloads libpayload: make searching for a file less verbose 2013-05-06 23:08:16 +02:00
src asrock/e350m1: reduce default stack size 2013-05-07 18:30:43 +02:00
util nvramtool: Use CMOS_SIZE for cmos size 2013-05-04 00:14:11 +02:00
.gitignore add a few entries to .gitignore 2013-01-10 22:51:20 +01:00
.gitmodules gitmodules: Ignore 3rdparty in "diff family" 2013-03-16 04:07:14 +01:00
.gitreview add .gitreview 2012-11-01 23:13:39 +01:00
COPYING update license template. 2006-08-12 22:03:36 +00:00
Makefile build system: Retire REQUIRES_BLOB 2013-02-19 11:00:41 +01:00
Makefile.inc rmodule: add rmodules class and new type 2013-03-18 20:46:40 +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.